swarm: integrate OpenTracing; propagate ctx to internal APIs (#17169)

* swarm: propagate ctx, enable opentracing

* swarm/tracing: log error when tracing is misconfigured

120 files changed, 21038 insertions, 0 deletions

diff --git a/vendor/github.com/codahale/hdrhistogram/LICENSE b/vendor/github.com/codahale/hdrhistogram/LICENSE
new file mode 100644
index 000000000..f9835c241
--- /dev/null
+++ b/vendor/github.com/codahale/hdrhistogram/LICENSE
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2014 Coda Hale
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/vendor/github.com/codahale/hdrhistogram/README.md b/vendor/github.com/codahale/hdrhistogram/README.md
new file mode 100644
index 000000000..614b197c3
--- /dev/null
+++ b/vendor/github.com/codahale/hdrhistogram/README.md
@@ -0,0 +1,15 @@
+hdrhistogram
+============
+
+[![Build Status](https://travis-ci.org/codahale/hdrhistogram.png?branch=master)](https://travis-ci.org/codahale/hdrhistogram)
+
+A pure Go implementation of the [HDR Histogram](https://github.com/HdrHistogram/HdrHistogram).
+
+> A Histogram that supports recording and analyzing sampled data value counts
+> across a configurable integer value range with configurable value precision
+> within the range. Value precision is expressed as the number of significant
+> digits in the value recording, and provides control over value quantization
+> behavior across the value range and the subsequent value resolution at any
+> given level.
+
+For documentation, check [godoc](http://godoc.org/github.com/codahale/hdrhistogram).
diff --git a/vendor/github.com/codahale/hdrhistogram/hdr.go b/vendor/github.com/codahale/hdrhistogram/hdr.go
new file mode 100644
index 000000000..c97842926
--- /dev/null
+++ b/vendor/github.com/codahale/hdrhistogram/hdr.go
@@ -0,0 +1,564 @@
+// Package hdrhistogram provides an implementation of Gil Tene's HDR Histogram
+// data structure. The HDR Histogram allows for fast and accurate analysis of
+// the extreme ranges of data with non-normal distributions, like latency.
+package hdrhistogram
+
+import (
+	"fmt"
+	"math"
+)
+
+// A Bracket is a part of a cumulative distribution.
+type Bracket struct {
+	Quantile       float64
+	Count, ValueAt int64
+}
+
+// A Snapshot is an exported view of a Histogram, useful for serializing them.
+// A Histogram can be constructed from it by passing it to Import.
+type Snapshot struct {
+	LowestTrackableValue  int64
+	HighestTrackableValue int64
+	SignificantFigures    int64
+	Counts                []int64
+}
+
+// A Histogram is a lossy data structure used to record the distribution of
+// non-normally distributed data (like latency) with a high degree of accuracy
+// and a bounded degree of precision.
+type Histogram struct {
+	lowestTrackableValue        int64
+	highestTrackableValue       int64
+	unitMagnitude               int64
+	significantFigures          int64
+	subBucketHalfCountMagnitude int32
+	subBucketHalfCount          int32
+	subBucketMask               int64
+	subBucketCount              int32
+	bucketCount                 int32
+	countsLen                   int32
+	totalCount                  int64
+	counts                      []int64
+}
+
+// New returns a new Histogram instance capable of tracking values in the given
+// range and with the given amount of precision.
+func New(minValue, maxValue int64, sigfigs int) *Histogram {
+	if sigfigs < 1 || 5 < sigfigs {
+		panic(fmt.Errorf("sigfigs must be [1,5] (was %d)", sigfigs))
+	}
+
+	largestValueWithSingleUnitResolution := 2 * math.Pow10(sigfigs)
+	subBucketCountMagnitude := int32(math.Ceil(math.Log2(float64(largestValueWithSingleUnitResolution))))
+
+	subBucketHalfCountMagnitude := subBucketCountMagnitude
+	if subBucketHalfCountMagnitude < 1 {
+		subBucketHalfCountMagnitude = 1
+	}
+	subBucketHalfCountMagnitude--
+
+	unitMagnitude := int32(math.Floor(math.Log2(float64(minValue))))
+	if unitMagnitude < 0 {
+		unitMagnitude = 0
+	}
+
+	subBucketCount := int32(math.Pow(2, float64(subBucketHalfCountMagnitude)+1))
+
+	subBucketHalfCount := subBucketCount / 2
+	subBucketMask := int64(subBucketCount-1) << uint(unitMagnitude)
+
+	// determine exponent range needed to support the trackable value with no
+	// overflow:
+	smallestUntrackableValue := int64(subBucketCount) << uint(unitMagnitude)
+	bucketsNeeded := int32(1)
+	for smallestUntrackableValue < maxValue {
+		smallestUntrackableValue <<= 1
+		bucketsNeeded++
+	}
+
+	bucketCount := bucketsNeeded
+	countsLen := (bucketCount + 1) * (subBucketCount / 2)
+
+	return &Histogram{
+		lowestTrackableValue:        minValue,
+		highestTrackableValue:       maxValue,
+		unitMagnitude:               int64(unitMagnitude),
+		significantFigures:          int64(sigfigs),
+		subBucketHalfCountMagnitude: subBucketHalfCountMagnitude,
+		subBucketHalfCount:          subBucketHalfCount,
+		subBucketMask:               subBucketMask,
+		subBucketCount:              subBucketCount,
+		bucketCount:                 bucketCount,
+		countsLen:                   countsLen,
+		totalCount:                  0,
+		counts:                      make([]int64, countsLen),
+	}
+}
+
+// ByteSize returns an estimate of the amount of memory allocated to the
+// histogram in bytes.
+//
+// N.B.: This does not take into account the overhead for slices, which are
+// small, constant, and specific to the compiler version.
+func (h *Histogram) ByteSize() int {
+	return 6*8 + 5*4 + len(h.counts)*8
+}
+
+// Merge merges the data stored in the given histogram with the receiver,
+// returning the number of recorded values which had to be dropped.
+func (h *Histogram) Merge(from *Histogram) (dropped int64) {
+	i := from.rIterator()
+	for i.next() {
+		v := i.valueFromIdx
+		c := i.countAtIdx
+
+		if h.RecordValues(v, c) != nil {
+			dropped += c
+		}
+	}
+
+	return
+}
+
+// TotalCount returns total number of values recorded.
+func (h *Histogram) TotalCount() int64 {
+	return h.totalCount
+}
+
+// Max returns the approximate maximum recorded value.
+func (h *Histogram) Max() int64 {
+	var max int64
+	i := h.iterator()
+	for i.next() {
+		if i.countAtIdx != 0 {
+			max = i.highestEquivalentValue
+		}
+	}
+	return h.highestEquivalentValue(max)
+}
+
+// Min returns the approximate minimum recorded value.
+func (h *Histogram) Min() int64 {
+	var min int64
+	i := h.iterator()
+	for i.next() {
+		if i.countAtIdx != 0 && min == 0 {
+			min = i.highestEquivalentValue
+			break
+		}
+	}
+	return h.lowestEquivalentValue(min)
+}
+
+// Mean returns the approximate arithmetic mean of the recorded values.
+func (h *Histogram) Mean() float64 {
+	if h.totalCount == 0 {
+		return 0
+	}
+	var total int64
+	i := h.iterator()
+	for i.next() {
+		if i.countAtIdx != 0 {
+			total += i.countAtIdx * h.medianEquivalentValue(i.valueFromIdx)
+		}
+	}
+	return float64(total) / float64(h.totalCount)
+}
+
+// StdDev returns the approximate standard deviation of the recorded values.
+func (h *Histogram) StdDev() float64 {
+	if h.totalCount == 0 {
+		return 0
+	}
+
+	mean := h.Mean()
+	geometricDevTotal := 0.0
+
+	i := h.iterator()
+	for i.next() {
+		if i.countAtIdx != 0 {
+			dev := float64(h.medianEquivalentValue(i.valueFromIdx)) - mean
+			geometricDevTotal += (dev * dev) * float64(i.countAtIdx)
+		}
+	}
+
+	return math.Sqrt(geometricDevTotal / float64(h.totalCount))
+}
+
+// Reset deletes all recorded values and restores the histogram to its original
+// state.
+func (h *Histogram) Reset() {
+	h.totalCount = 0
+	for i := range h.counts {
+		h.counts[i] = 0
+	}
+}
+
+// RecordValue records the given value, returning an error if the value is out
+// of range.
+func (h *Histogram) RecordValue(v int64) error {
+	return h.RecordValues(v, 1)
+}
+
+// RecordCorrectedValue records the given value, correcting for stalls in the
+// recording process. This only works for processes which are recording values
+// at an expected interval (e.g., doing jitter analysis). Processes which are
+// recording ad-hoc values (e.g., latency for incoming requests) can't take
+// advantage of this.
+func (h *Histogram) RecordCorrectedValue(v, expectedInterval int64) error {
+	if err := h.RecordValue(v); err != nil {
+		return err
+	}
+
+	if expectedInterval <= 0 || v <= expectedInterval {
+		return nil
+	}
+
+	missingValue := v - expectedInterval
+	for missingValue >= expectedInterval {
+		if err := h.RecordValue(missingValue); err != nil {
+			return err
+		}
+		missingValue -= expectedInterval
+	}
+
+	return nil
+}
+
+// RecordValues records n occurrences of the given value, returning an error if
+// the value is out of range.
+func (h *Histogram) RecordValues(v, n int64) error {
+	idx := h.countsIndexFor(v)
+	if idx < 0 || int(h.countsLen) <= idx {
+		return fmt.Errorf("value %d is too large to be recorded", v)
+	}
+	h.counts[idx] += n
+	h.totalCount += n
+
+	return nil
+}
+
+// ValueAtQuantile returns the recorded value at the given quantile (0..100).
+func (h *Histogram) ValueAtQuantile(q float64) int64 {
+	if q > 100 {
+		q = 100
+	}
+
+	total := int64(0)
+	countAtPercentile := int64(((q / 100) * float64(h.totalCount)) + 0.5)
+
+	i := h.iterator()
+	for i.next() {
+		total += i.countAtIdx
+		if total >= countAtPercentile {
+			return h.highestEquivalentValue(i.valueFromIdx)
+		}
+	}
+
+	return 0
+}
+
+// CumulativeDistribution returns an ordered list of brackets of the
+// distribution of recorded values.
+func (h *Histogram) CumulativeDistribution() []Bracket {
+	var result []Bracket
+
+	i := h.pIterator(1)
+	for i.next() {
+		result = append(result, Bracket{
+			Quantile: i.percentile,
+			Count:    i.countToIdx,
+			ValueAt:  i.highestEquivalentValue,
+		})
+	}
+
+	return result
+}
+
+// SignificantFigures returns the significant figures used to create the
+// histogram
+func (h *Histogram) SignificantFigures() int64 {
+	return h.significantFigures
+}
+
+// LowestTrackableValue returns the lower bound on values that will be added
+// to the histogram
+func (h *Histogram) LowestTrackableValue() int64 {
+	return h.lowestTrackableValue
+}
+
+// HighestTrackableValue returns the upper bound on values that will be added
+// to the histogram
+func (h *Histogram) HighestTrackableValue() int64 {
+	return h.highestTrackableValue
+}
+
+// Histogram bar for plotting
+type Bar struct {
+	From, To, Count int64
+}
+
+// Pretty print as csv for easy plotting
+func (b Bar) String() string {
+	return fmt.Sprintf("%v, %v, %v\n", b.From, b.To, b.Count)
+}
+
+// Distribution returns an ordered list of bars of the
+// distribution of recorded values, counts can be normalized to a probability
+func (h *Histogram) Distribution() (result []Bar) {
+	i := h.iterator()
+	for i.next() {
+		result = append(result, Bar{
+			Count: i.countAtIdx,
+			From:  h.lowestEquivalentValue(i.valueFromIdx),
+			To:    i.highestEquivalentValue,
+		})
+	}
+
+	return result
+}
+
+// Equals returns true if the two Histograms are equivalent, false if not.
+func (h *Histogram) Equals(other *Histogram) bool {
+	switch {
+	case
+		h.lowestTrackableValue != other.lowestTrackableValue,
+		h.highestTrackableValue != other.highestTrackableValue,
+		h.unitMagnitude != other.unitMagnitude,
+		h.significantFigures != other.significantFigures,
+		h.subBucketHalfCountMagnitude != other.subBucketHalfCountMagnitude,
+		h.subBucketHalfCount != other.subBucketHalfCount,
+		h.subBucketMask != other.subBucketMask,
+		h.subBucketCount != other.subBucketCount,
+		h.bucketCount != other.bucketCount,
+		h.countsLen != other.countsLen,
+		h.totalCount != other.totalCount:
+		return false
+	default:
+		for i, c := range h.counts {
+			if c != other.counts[i] {
+				return false
+			}
+		}
+	}
+	return true
+}
+
+// Export returns a snapshot view of the Histogram. This can be later passed to
+// Import to construct a new Histogram with the same state.
+func (h *Histogram) Export() *Snapshot {
+	return &Snapshot{
+		LowestTrackableValue:  h.lowestTrackableValue,
+		HighestTrackableValue: h.highestTrackableValue,
+		SignificantFigures:    h.significantFigures,
+		Counts:                append([]int64(nil), h.counts...), // copy
+	}
+}
+
+// Import returns a new Histogram populated from the Snapshot data (which the
+// caller must stop accessing).
+func Import(s *Snapshot) *Histogram {
+	h := New(s.LowestTrackableValue, s.HighestTrackableValue, int(s.SignificantFigures))
+	h.counts = s.Counts
+	totalCount := int64(0)
+	for i := int32(0); i < h.countsLen; i++ {
+		countAtIndex := h.counts[i]
+		if countAtIndex > 0 {
+			totalCount += countAtIndex
+		}
+	}
+	h.totalCount = totalCount
+	return h
+}
+
+func (h *Histogram) iterator() *iterator {
+	return &iterator{
+		h:            h,
+		subBucketIdx: -1,
+	}
+}
+
+func (h *Histogram) rIterator() *rIterator {
+	return &rIterator{
+		iterator: iterator{
+			h:            h,
+			subBucketIdx: -1,
+		},
+	}
+}
+
+func (h *Histogram) pIterator(ticksPerHalfDistance int32) *pIterator {
+	return &pIterator{
+		iterator: iterator{
+			h:            h,
+			subBucketIdx: -1,
+		},
+		ticksPerHalfDistance: ticksPerHalfDistance,
+	}
+}
+
+func (h *Histogram) sizeOfEquivalentValueRange(v int64) int64 {
+	bucketIdx := h.getBucketIndex(v)
+	subBucketIdx := h.getSubBucketIdx(v, bucketIdx)
+	adjustedBucket := bucketIdx
+	if subBucketIdx >= h.subBucketCount {
+		adjustedBucket++
+	}
+	return int64(1) << uint(h.unitMagnitude+int64(adjustedBucket))
+}
+
+func (h *Histogram) valueFromIndex(bucketIdx, subBucketIdx int32) int64 {
+	return int64(subBucketIdx) << uint(int64(bucketIdx)+h.unitMagnitude)
+}
+
+func (h *Histogram) lowestEquivalentValue(v int64) int64 {
+	bucketIdx := h.getBucketIndex(v)
+	subBucketIdx := h.getSubBucketIdx(v, bucketIdx)
+	return h.valueFromIndex(bucketIdx, subBucketIdx)
+}
+
+func (h *Histogram) nextNonEquivalentValue(v int64) int64 {
+	return h.lowestEquivalentValue(v) + h.sizeOfEquivalentValueRange(v)
+}
+
+func (h *Histogram) highestEquivalentValue(v int64) int64 {
+	return h.nextNonEquivalentValue(v) - 1
+}
+
+func (h *Histogram) medianEquivalentValue(v int64) int64 {
+	return h.lowestEquivalentValue(v) + (h.sizeOfEquivalentValueRange(v) >> 1)
+}
+
+func (h *Histogram) getCountAtIndex(bucketIdx, subBucketIdx int32) int64 {
+	return h.counts[h.countsIndex(bucketIdx, subBucketIdx)]
+}
+
+func (h *Histogram) countsIndex(bucketIdx, subBucketIdx int32) int32 {
+	bucketBaseIdx := (bucketIdx + 1) << uint(h.subBucketHalfCountMagnitude)
+	offsetInBucket := subBucketIdx - h.subBucketHalfCount
+	return bucketBaseIdx + offsetInBucket
+}
+
+func (h *Histogram) getBucketIndex(v int64) int32 {
+	pow2Ceiling := bitLen(v | h.subBucketMask)
+	return int32(pow2Ceiling - int64(h.unitMagnitude) -
+		int64(h.subBucketHalfCountMagnitude+1))
+}
+
+func (h *Histogram) getSubBucketIdx(v int64, idx int32) int32 {
+	return int32(v >> uint(int64(idx)+int64(h.unitMagnitude)))
+}
+
+func (h *Histogram) countsIndexFor(v int64) int {
+	bucketIdx := h.getBucketIndex(v)
+	subBucketIdx := h.getSubBucketIdx(v, bucketIdx)
+	return int(h.countsIndex(bucketIdx, subBucketIdx))
+}
+
+type iterator struct {
+	h                                    *Histogram
+	bucketIdx, subBucketIdx              int32
+	countAtIdx, countToIdx, valueFromIdx int64
+	highestEquivalentValue               int64
+}
+
+func (i *iterator) next() bool {
+	if i.countToIdx >= i.h.totalCount {
+		return false
+	}
+
+	// increment bucket
+	i.subBucketIdx++
+	if i.subBucketIdx >= i.h.subBucketCount {
+		i.subBucketIdx = i.h.subBucketHalfCount
+		i.bucketIdx++
+	}
+
+	if i.bucketIdx >= i.h.bucketCount {
+		return false
+	}
+
+	i.countAtIdx = i.h.getCountAtIndex(i.bucketIdx, i.subBucketIdx)
+	i.countToIdx += i.countAtIdx
+	i.valueFromIdx = i.h.valueFromIndex(i.bucketIdx, i.subBucketIdx)
+	i.highestEquivalentValue = i.h.highestEquivalentValue(i.valueFromIdx)
+
+	return true
+}
+
+type rIterator struct {
+	iterator
+	countAddedThisStep int64
+}
+
+func (r *rIterator) next() bool {
+	for r.iterator.next() {
+		if r.countAtIdx != 0 {
+			r.countAddedThisStep = r.countAtIdx
+			return true
+		}
+	}
+	return false
+}
+
+type pIterator struct {
+	iterator
+	seenLastValue          bool
+	ticksPerHalfDistance   int32
+	percentileToIteratorTo float64
+	percentile             float64
+}
+
+func (p *pIterator) next() bool {
+	if !(p.countToIdx < p.h.totalCount) {
+		if p.seenLastValue {
+			return false
+		}
+
+		p.seenLastValue = true
+		p.percentile = 100
+
+		return true
+	}
+
+	if p.subBucketIdx == -1 && !p.iterator.next() {
+		return false
+	}
+
+	var done = false
+	for !done {
+		currentPercentile := (100.0 * float64(p.countToIdx)) / float64(p.h.totalCount)
+		if p.countAtIdx != 0 && p.percentileToIteratorTo <= currentPercentile {
+			p.percentile = p.percentileToIteratorTo
+			halfDistance := math.Trunc(math.Pow(2, math.Trunc(math.Log2(100.0/(100.0-p.percentileToIteratorTo)))+1))
+			percentileReportingTicks := float64(p.ticksPerHalfDistance) * halfDistance
+			p.percentileToIteratorTo += 100.0 / percentileReportingTicks
+			return true
+		}
+		done = !p.iterator.next()
+	}
+
+	return true
+}
+
+func bitLen(x int64) (n int64) {
+	for ; x >= 0x8000; x >>= 16 {
+		n += 16
+	}
+	if x >= 0x80 {
+		x >>= 8
+		n += 8
+	}
+	if x >= 0x8 {
+		x >>= 4
+		n += 4
+	}
+	if x >= 0x2 {
+		x >>= 2
+		n += 2
+	}
+	if x >= 0x1 {
+		n++
+	}
+	return
+}
diff --git a/vendor/github.com/codahale/hdrhistogram/window.go b/vendor/github.com/codahale/hdrhistogram/window.go
new file mode 100644
index 000000000..dc43612a4
--- /dev/null
+++ b/vendor/github.com/codahale/hdrhistogram/window.go
@@ -0,0 +1,45 @@
+package hdrhistogram
+
+// A WindowedHistogram combines histograms to provide windowed statistics.
+type WindowedHistogram struct {
+	idx int
+	h   []Histogram
+	m   *Histogram
+
+	Current *Histogram
+}
+
+// NewWindowed creates a new WindowedHistogram with N underlying histograms with
+// the given parameters.
+func NewWindowed(n int, minValue, maxValue int64, sigfigs int) *WindowedHistogram {
+	w := WindowedHistogram{
+		idx: -1,
+		h:   make([]Histogram, n),
+		m:   New(minValue, maxValue, sigfigs),
+	}
+
+	for i := range w.h {
+		w.h[i] = *New(minValue, maxValue, sigfigs)
+	}
+	w.Rotate()
+
+	return &w
+}
+
+// Merge returns a histogram which includes the recorded values from all the
+// sections of the window.
+func (w *WindowedHistogram) Merge() *Histogram {
+	w.m.Reset()
+	for _, h := range w.h {
+		w.m.Merge(&h)
+	}
+	return w.m
+}
+
+// Rotate resets the oldest histogram and rotates it to be used as the current
+// histogram.
+func (w *WindowedHistogram) Rotate() {
+	w.idx++
+	w.Current = &w.h[w.idx%len(w.h)]
+	w.Current.Reset()
+}
diff --git a/vendor/github.com/opentracing/opentracing-go/CHANGELOG.md b/vendor/github.com/opentracing/opentracing-go/CHANGELOG.md
new file mode 100644
index 000000000..1fc9fdf7f
--- /dev/null
+++ b/vendor/github.com/opentracing/opentracing-go/CHANGELOG.md
@@ -0,0 +1,14 @@
+Changes by Version
+==================
+
+1.1.0 (unreleased)
+-------------------
+
+- Deprecate InitGlobalTracer() in favor of SetGlobalTracer()
+
+
+1.0.0 (2016-09-26)
+-------------------
+
+- This release implements OpenTracing Specification 1.0 (http://opentracing.io/spec)
+
diff --git a/vendor/github.com/opentracing/opentracing-go/LICENSE b/vendor/github.com/opentracing/opentracing-go/LICENSE
new file mode 100644
index 000000000..f0027349e
--- /dev/null
+++ b/vendor/github.com/opentracing/opentracing-go/LICENSE
@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
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+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
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+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
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+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
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+          of the following places: within a NOTICE text file distributed
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+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "{}"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright 2016 The OpenTracing Authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/vendor/github.com/opentracing/opentracing-go/Makefile b/vendor/github.com/opentracing/opentracing-go/Makefile
new file mode 100644
index 000000000..d49a5c0d4
--- /dev/null
+++ b/vendor/github.com/opentracing/opentracing-go/Makefile
@@ -0,0 +1,32 @@
+PACKAGES := . ./mocktracer/... ./ext/...
+
+.DEFAULT_GOAL := test-and-lint
+
+.PHONE: test-and-lint
+
+test-and-lint: test lint
+
+.PHONY: test
+test:
+	go test -v -cover -race ./...
+
+cover:
+	@rm -rf cover-all.out
+	$(foreach pkg, $(PACKAGES), $(MAKE) cover-pkg PKG=$(pkg) || true;)
+	@grep mode: cover.out > coverage.out
+	@cat cover-all.out >> coverage.out
+	go tool cover -html=coverage.out -o cover.html
+	@rm -rf cover.out cover-all.out coverage.out
+
+cover-pkg:
+	go test -coverprofile cover.out $(PKG)
+	@grep -v mode: cover.out >> cover-all.out
+
+.PHONY: lint
+lint:
+	go fmt ./...
+	golint ./...
+	@# Run again with magic to exit non-zero if golint outputs anything.
+	@! (golint ./... | read dummy)
+	go vet ./...
+
diff --git a/vendor/github.com/opentracing/opentracing-go/README.md b/vendor/github.com/opentracing/opentracing-go/README.md
new file mode 100644
index 000000000..007ee237c
--- /dev/null
+++ b/vendor/github.com/opentracing/opentracing-go/README.md
@@ -0,0 +1,171 @@
+[![Gitter chat](http://img.shields.io/badge/gitter-join%20chat%20%E2%86%92-brightgreen.svg)](https://gitter.im/opentracing/public) [![Build Status](https://travis-ci.org/opentracing/opentracing-go.svg?branch=master)](https://travis-ci.org/opentracing/opentracing-go) [![GoDoc](https://godoc.org/github.com/opentracing/opentracing-go?status.svg)](http://godoc.org/github.com/opentracing/opentracing-go)
+[![Sourcegraph Badge](https://sourcegraph.com/github.com/opentracing/opentracing-go/-/badge.svg)](https://sourcegraph.com/github.com/opentracing/opentracing-go?badge)
+
+# OpenTracing API for Go
+
+This package is a Go platform API for OpenTracing.
+
+## Required Reading
+
+In order to understand the Go platform API, one must first be familiar with the
+[OpenTracing project](http://opentracing.io) and
+[terminology](http://opentracing.io/documentation/pages/spec.html) more specifically.
+
+## API overview for those adding instrumentation
+
+Everyday consumers of this `opentracing` package really only need to worry
+about a couple of key abstractions: the `StartSpan` function, the `Span`
+interface, and binding a `Tracer` at `main()`-time. Here are code snippets
+demonstrating some important use cases.
+
+#### Singleton initialization
+
+The simplest starting point is `./default_tracer.go`. As early as possible, call
+
+```go
+    import "github.com/opentracing/opentracing-go"
+    import ".../some_tracing_impl"
+
+    func main() {
+        opentracing.SetGlobalTracer(
+            // tracing impl specific:
+            some_tracing_impl.New(...),
+        )
+        ...
+    }
+```
+
+#### Non-Singleton initialization
+
+If you prefer direct control to singletons, manage ownership of the
+`opentracing.Tracer` implementation explicitly.
+
+#### Creating a Span given an existing Go `context.Context`
+
+If you use `context.Context` in your application, OpenTracing's Go library will
+happily rely on it for `Span` propagation. To start a new (blocking child)
+`Span`, you can use `StartSpanFromContext`.
+
+```go
+    func xyz(ctx context.Context, ...) {
+        ...
+        span, ctx := opentracing.StartSpanFromContext(ctx, "operation_name")
+        defer span.Finish()
+        span.LogFields(
+            log.String("event", "soft error"),
+            log.String("type", "cache timeout"),
+            log.Int("waited.millis", 1500))
+        ...
+    }
+```
+
+#### Starting an empty trace by creating a "root span"
+
+It's always possible to create a "root" `Span` with no parent or other causal
+reference.
+
+```go
+    func xyz() {
+        ...
+        sp := opentracing.StartSpan("operation_name")
+        defer sp.Finish()
+        ...
+    }
+```
+
+#### Creating a (child) Span given an existing (parent) Span
+
+```go
+    func xyz(parentSpan opentracing.Span, ...) {
+        ...
+        sp := opentracing.StartSpan(
+            "operation_name",
+            opentracing.ChildOf(parentSpan.Context()))
+        defer sp.Finish()
+        ...
+    }
+```
+
+#### Serializing to the wire
+
+```go
+    func makeSomeRequest(ctx context.Context) ... {
+        if span := opentracing.SpanFromContext(ctx); span != nil {
+            httpClient := &http.Client{}
+            httpReq, _ := http.NewRequest("GET", "http://myservice/", nil)
+
+            // Transmit the span's TraceContext as HTTP headers on our
+            // outbound request.
+            opentracing.GlobalTracer().Inject(
+                span.Context(),
+                opentracing.HTTPHeaders,
+                opentracing.HTTPHeadersCarrier(httpReq.Header))
+
+            resp, err := httpClient.Do(httpReq)
+            ...
+        }
+        ...
+    }
+```
+
+#### Deserializing from the wire
+
+```go
+    http.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
+        var serverSpan opentracing.Span
+        appSpecificOperationName := ...
+        wireContext, err := opentracing.GlobalTracer().Extract(
+            opentracing.HTTPHeaders,
+            opentracing.HTTPHeadersCarrier(req.Header))
+        if err != nil {
+            // Optionally record something about err here
+        }
+
+        // Create the span referring to the RPC client if available.
+        // If wireContext == nil, a root span will be created.
+        serverSpan = opentracing.StartSpan(
+            appSpecificOperationName,
+            ext.RPCServerOption(wireContext))
+
+        defer serverSpan.Finish()
+
+        ctx := opentracing.ContextWithSpan(context.Background(), serverSpan)
+        ...
+    }
+```
+
+#### Conditionally capture a field using `log.Noop`
+
+In some situations, you may want to dynamically decide whether or not
+to log a field.  For example, you may want to capture additional data,
+such as a customer ID, in non-production environments:
+
+```go
+    func Customer(order *Order) log.Field {
+        if os.Getenv("ENVIRONMENT") == "dev" {
+            return log.String("customer", order.Customer.ID)
+        }
+        return log.Noop()
+    }
+```
+
+#### Goroutine-safety
+
+The entire public API is goroutine-safe and does not require external
+synchronization.
+
+## API pointers for those implementing a tracing system
+
+Tracing system implementors may be able to reuse or copy-paste-modify the `basictracer` package, found [here](https://github.com/opentracing/basictracer-go). In particular, see `basictracer.New(...)`.
+
+## API compatibility
+
+For the time being, "mild" backwards-incompatible changes may be made without changing the major version number. As OpenTracing and `opentracing-go` mature, backwards compatibility will become more of a priority.
+
+## Tracer test suite
+
+A test suite is available in the [harness](https://godoc.org/github.com/opentracing/opentracing-go/harness) package that can assist Tracer implementors to assert that their Tracer is working correctly.
+
+## Licensing
+
+[Apache 2.0 License](./LICENSE).
diff --git a/vendor/github.com/opentracing/opentracing-go/ext/tags.go b/vendor/github.com/opentracing/opentracing-go/ext/tags.go
new file mode 100644
index 000000000..8800129a2
--- /dev/null
+++ b/vendor/github.com/opentracing/opentracing-go/ext/tags.go
@@ -0,0 +1,210 @@
+package ext
+
+import opentracing "github.com/opentracing/opentracing-go"
+
+// These constants define common tag names recommended for better portability across
+// tracing systems and languages/platforms.
+//
+// The tag names are defined as typed strings, so that in addition to the usual use
+//
+//     span.setTag(TagName, value)
+//
+// they also support value type validation via this additional syntax:
+//
+//    TagName.Set(span, value)
+//
+var (
+	//////////////////////////////////////////////////////////////////////
+	// SpanKind (client/server or producer/consumer)
+	//////////////////////////////////////////////////////////////////////
+
+	// SpanKind hints at relationship between spans, e.g. client/server
+	SpanKind = spanKindTagName("span.kind")
+
+	// SpanKindRPCClient marks a span representing the client-side of an RPC
+	// or other remote call
+	SpanKindRPCClientEnum = SpanKindEnum("client")
+	SpanKindRPCClient     = opentracing.Tag{Key: string(SpanKind), Value: SpanKindRPCClientEnum}
+
+	// SpanKindRPCServer marks a span representing the server-side of an RPC
+	// or other remote call
+	SpanKindRPCServerEnum = SpanKindEnum("server")
+	SpanKindRPCServer     = opentracing.Tag{Key: string(SpanKind), Value: SpanKindRPCServerEnum}
+
+	// SpanKindProducer marks a span representing the producer-side of a
+	// message bus
+	SpanKindProducerEnum = SpanKindEnum("producer")
+	SpanKindProducer     = opentracing.Tag{Key: string(SpanKind), Value: SpanKindProducerEnum}
+
+	// SpanKindConsumer marks a span representing the consumer-side of a
+	// message bus
+	SpanKindConsumerEnum = SpanKindEnum("consumer")
+	SpanKindConsumer     = opentracing.Tag{Key: string(SpanKind), Value: SpanKindConsumerEnum}
+
+	//////////////////////////////////////////////////////////////////////
+	// Component name
+	//////////////////////////////////////////////////////////////////////
+
+	// Component is a low-cardinality identifier of the module, library,
+	// or package that is generating a span.
+	Component = stringTagName("component")
+
+	//////////////////////////////////////////////////////////////////////
+	// Sampling hint
+	//////////////////////////////////////////////////////////////////////
+
+	// SamplingPriority determines the priority of sampling this Span.
+	SamplingPriority = uint16TagName("sampling.priority")
+
+	//////////////////////////////////////////////////////////////////////
+	// Peer tags. These tags can be emitted by either client-side of
+	// server-side to describe the other side/service in a peer-to-peer
+	// communications, like an RPC call.
+	//////////////////////////////////////////////////////////////////////
+
+	// PeerService records the service name of the peer.
+	PeerService = stringTagName("peer.service")
+
+	// PeerAddress records the address name of the peer. This may be a "ip:port",
+	// a bare "hostname", a FQDN or even a database DSN substring
+	// like "mysql://username@127.0.0.1:3306/dbname"
+	PeerAddress = stringTagName("peer.address")
+
+	// PeerHostname records the host name of the peer
+	PeerHostname = stringTagName("peer.hostname")
+
+	// PeerHostIPv4 records IP v4 host address of the peer
+	PeerHostIPv4 = ipv4Tag("peer.ipv4")
+
+	// PeerHostIPv6 records IP v6 host address of the peer
+	PeerHostIPv6 = stringTagName("peer.ipv6")
+
+	// PeerPort records port number of the peer
+	PeerPort = uint16TagName("peer.port")
+
+	//////////////////////////////////////////////////////////////////////
+	// HTTP Tags
+	//////////////////////////////////////////////////////////////////////
+
+	// HTTPUrl should be the URL of the request being handled in this segment
+	// of the trace, in standard URI format. The protocol is optional.
+	HTTPUrl = stringTagName("http.url")
+
+	// HTTPMethod is the HTTP method of the request, and is case-insensitive.
+	HTTPMethod = stringTagName("http.method")
+
+	// HTTPStatusCode is the numeric HTTP status code (200, 404, etc) of the
+	// HTTP response.
+	HTTPStatusCode = uint16TagName("http.status_code")
+
+	//////////////////////////////////////////////////////////////////////
+	// DB Tags
+	//////////////////////////////////////////////////////////////////////
+
+	// DBInstance is database instance name.
+	DBInstance = stringTagName("db.instance")
+
+	// DBStatement is a database statement for the given database type.
+	// It can be a query or a prepared statement (i.e., before substitution).
+	DBStatement = stringTagName("db.statement")
+
+	// DBType is a database type. For any SQL database, "sql".
+	// For others, the lower-case database category, e.g. "redis"
+	DBType = stringTagName("db.type")
+
+	// DBUser is a username for accessing database.
+	DBUser = stringTagName("db.user")
+
+	//////////////////////////////////////////////////////////////////////
+	// Message Bus Tag
+	//////////////////////////////////////////////////////////////////////
+
+	// MessageBusDestination is an address at which messages can be exchanged
+	MessageBusDestination = stringTagName("message_bus.destination")
+
+	//////////////////////////////////////////////////////////////////////
+	// Error Tag
+	//////////////////////////////////////////////////////////////////////
+
+	// Error indicates that operation represented by the span resulted in an error.
+	Error = boolTagName("error")
+)
+
+// ---
+
+// SpanKindEnum represents common span types
+type SpanKindEnum string
+
+type spanKindTagName string
+
+// Set adds a string tag to the `span`
+func (tag spanKindTagName) Set(span opentracing.Span, value SpanKindEnum) {
+	span.SetTag(string(tag), value)
+}
+
+type rpcServerOption struct {
+	clientContext opentracing.SpanContext
+}
+
+func (r rpcServerOption) Apply(o *opentracing.StartSpanOptions) {
+	if r.clientContext != nil {
+		opentracing.ChildOf(r.clientContext).Apply(o)
+	}
+	SpanKindRPCServer.Apply(o)
+}
+
+// RPCServerOption returns a StartSpanOption appropriate for an RPC server span
+// with `client` representing the metadata for the remote peer Span if available.
+// In case client == nil, due to the client not being instrumented, this RPC
+// server span will be a root span.
+func RPCServerOption(client opentracing.SpanContext) opentracing.StartSpanOption {
+	return rpcServerOption{client}
+}
+
+// ---
+
+type stringTagName string
+
+// Set adds a string tag to the `span`
+func (tag stringTagName) Set(span opentracing.Span, value string) {
+	span.SetTag(string(tag), value)
+}
+
+// ---
+
+type uint32TagName string
+
+// Set adds a uint32 tag to the `span`
+func (tag uint32TagName) Set(span opentracing.Span, value uint32) {
+	span.SetTag(string(tag), value)
+}
+
+// ---
+
+type uint16TagName string
+
+// Set adds a uint16 tag to the `span`
+func (tag uint16TagName) Set(span opentracing.Span, value uint16) {
+	span.SetTag(string(tag), value)
+}
+
+// ---
+
+type boolTagName string
+
+// Add adds a bool tag to the `span`
+func (tag boolTagName) Set(span opentracing.Span, value bool) {
+	span.SetTag(string(tag), value)
+}
+
+type ipv4Tag string
+
+// Set adds IP v4 host address of the peer as an uint32 value to the `span`, keep this for backward and zipkin compatibility
+func (tag ipv4Tag) Set(span opentracing.Span, value uint32) {
+	span.SetTag(string(tag), value)
+}
+
+// SetString records IP v4 host address of the peer as a .-separated tuple to the `span`. E.g., "127.0.0.1"
+func (tag ipv4Tag) SetString(span opentracing.Span, value string) {
+	span.SetTag(string(tag), value)
+}
diff --git a/vendor/github.com/opentracing/opentracing-go/globaltracer.go b/vendor/github.com/opentracing/opentracing-go/globaltracer.go
new file mode 100644
index 000000000..8c8e793ff
--- /dev/null
+++ b/vendor/github.com/opentracing/opentracing-go/globaltracer.go
@@ -0,0 +1,32 @@
+package opentracing
+
+var (
+	globalTracer Tracer = NoopTracer{}
+)
+
+// SetGlobalTracer sets the [singleton] opentracing.Tracer returned by
+// GlobalTracer(). Those who use GlobalTracer (rather than directly manage an
+// opentracing.Tracer instance) should call SetGlobalTracer as early as
+// possible in main(), prior to calling the `StartSpan` global func below.
+// Prior to calling `SetGlobalTracer`, any Spans started via the `StartSpan`
+// (etc) globals are noops.
+func SetGlobalTracer(tracer Tracer) {
+	globalTracer = tracer
+}
+
+// GlobalTracer returns the global singleton `Tracer` implementation.
+// Before `SetGlobalTracer()` is called, the `GlobalTracer()` is a noop
+// implementation that drops all data handed to it.
+func GlobalTracer() Tracer {
+	return globalTracer
+}
+
+// StartSpan defers to `Tracer.StartSpan`. See `GlobalTracer()`.
+func StartSpan(operationName string, opts ...StartSpanOption) Span {
+	return globalTracer.StartSpan(operationName, opts...)
+}
+
+// InitGlobalTracer is deprecated. Please use SetGlobalTracer.
+func InitGlobalTracer(tracer Tracer) {
+	SetGlobalTracer(tracer)
+}
diff --git a/vendor/github.com/opentracing/opentracing-go/gocontext.go b/vendor/github.com/opentracing/opentracing-go/gocontext.go
new file mode 100644
index 000000000..05a62e70b
--- /dev/null
+++ b/vendor/github.com/opentracing/opentracing-go/gocontext.go
@@ -0,0 +1,54 @@
+package opentracing
+
+import "context"
+
+type contextKey struct{}
+
+var activeSpanKey = contextKey{}
+
+// ContextWithSpan returns a new `context.Context` that holds a reference to
+// `span`'s SpanContext.
+func ContextWithSpan(ctx context.Context, span Span) context.Context {
+	return context.WithValue(ctx, activeSpanKey, span)
+}
+
+// SpanFromContext returns the `Span` previously associated with `ctx`, or
+// `nil` if no such `Span` could be found.
+//
+// NOTE: context.Context != SpanContext: the former is Go's intra-process
+// context propagation mechanism, and the latter houses OpenTracing's per-Span
+// identity and baggage information.
+func SpanFromContext(ctx context.Context) Span {
+	val := ctx.Value(activeSpanKey)
+	if sp, ok := val.(Span); ok {
+		return sp
+	}
+	return nil
+}
+
+// StartSpanFromContext starts and returns a Span with `operationName`, using
+// any Span found within `ctx` as a ChildOfRef. If no such parent could be
+// found, StartSpanFromContext creates a root (parentless) Span.
+//
+// The second return value is a context.Context object built around the
+// returned Span.
+//
+// Example usage:
+//
+//    SomeFunction(ctx context.Context, ...) {
+//        sp, ctx := opentracing.StartSpanFromContext(ctx, "SomeFunction")
+//        defer sp.Finish()
+//        ...
+//    }
+func StartSpanFromContext(ctx context.Context, operationName string, opts ...StartSpanOption) (Span, context.Context) {
+	return startSpanFromContextWithTracer(ctx, GlobalTracer(), operationName, opts...)
+}
+
+// startSpanFromContextWithTracer is factored out for testing purposes.
+func startSpanFromContextWithTracer(ctx context.Context, tracer Tracer, operationName string, opts ...StartSpanOption) (Span, context.Context) {
+	if parentSpan := SpanFromContext(ctx); parentSpan != nil {
+		opts = append(opts, ChildOf(parentSpan.Context()))
+	}
+	span := tracer.StartSpan(operationName, opts...)
+	return span, ContextWithSpan(ctx, span)
+}
diff --git a/vendor/github.com/opentracing/opentracing-go/log/field.go b/vendor/github.com/opentracing/opentracing-go/log/field.go
new file mode 100644
index 000000000..50feea341
--- /dev/null
+++ b/vendor/github.com/opentracing/opentracing-go/log/field.go
@@ -0,0 +1,269 @@
+package log
+
+import (
+	"fmt"
+	"math"
+)
+
+type fieldType int
+
+const (
+	stringType fieldType = iota
+	boolType
+	intType
+	int32Type
+	uint32Type
+	int64Type
+	uint64Type
+	float32Type
+	float64Type
+	errorType
+	objectType
+	lazyLoggerType
+	noopType
+)
+
+// Field instances are constructed via LogBool, LogString, and so on.
+// Tracing implementations may then handle them via the Field.Marshal
+// method.
+//
+// "heavily influenced by" (i.e., partially stolen from)
+// https://github.com/uber-go/zap
+type Field struct {
+	key          string
+	fieldType    fieldType
+	numericVal   int64
+	stringVal    string
+	interfaceVal interface{}
+}
+
+// String adds a string-valued key:value pair to a Span.LogFields() record
+func String(key, val string) Field {
+	return Field{
+		key:       key,
+		fieldType: stringType,
+		stringVal: val,
+	}
+}
+
+// Bool adds a bool-valued key:value pair to a Span.LogFields() record
+func Bool(key string, val bool) Field {
+	var numericVal int64
+	if val {
+		numericVal = 1
+	}
+	return Field{
+		key:        key,
+		fieldType:  boolType,
+		numericVal: numericVal,
+	}
+}
+
+// Int adds an int-valued key:value pair to a Span.LogFields() record
+func Int(key string, val int) Field {
+	return Field{
+		key:        key,
+		fieldType:  intType,
+		numericVal: int64(val),
+	}
+}
+
+// Int32 adds an int32-valued key:value pair to a Span.LogFields() record
+func Int32(key string, val int32) Field {
+	return Field{
+		key:        key,
+		fieldType:  int32Type,
+		numericVal: int64(val),
+	}
+}
+
+// Int64 adds an int64-valued key:value pair to a Span.LogFields() record
+func Int64(key string, val int64) Field {
+	return Field{
+		key:        key,
+		fieldType:  int64Type,
+		numericVal: val,
+	}
+}
+
+// Uint32 adds a uint32-valued key:value pair to a Span.LogFields() record
+func Uint32(key string, val uint32) Field {
+	return Field{
+		key:        key,
+		fieldType:  uint32Type,
+		numericVal: int64(val),
+	}
+}
+
+// Uint64 adds a uint64-valued key:value pair to a Span.LogFields() record
+func Uint64(key string, val uint64) Field {
+	return Field{
+		key:        key,
+		fieldType:  uint64Type,
+		numericVal: int64(val),
+	}
+}
+
+// Float32 adds a float32-valued key:value pair to a Span.LogFields() record
+func Float32(key string, val float32) Field {
+	return Field{
+		key:        key,
+		fieldType:  float32Type,
+		numericVal: int64(math.Float32bits(val)),
+	}
+}
+
+// Float64 adds a float64-valued key:value pair to a Span.LogFields() record
+func Float64(key string, val float64) Field {
+	return Field{
+		key:        key,
+		fieldType:  float64Type,
+		numericVal: int64(math.Float64bits(val)),
+	}
+}
+
+// Error adds an error with the key "error" to a Span.LogFields() record
+func Error(err error) Field {
+	return Field{
+		key:          "error",
+		fieldType:    errorType,
+		interfaceVal: err,
+	}
+}
+
+// Object adds an object-valued key:value pair to a Span.LogFields() record
+func Object(key string, obj interface{}) Field {
+	return Field{
+		key:          key,
+		fieldType:    objectType,
+		interfaceVal: obj,
+	}
+}
+
+// LazyLogger allows for user-defined, late-bound logging of arbitrary data
+type LazyLogger func(fv Encoder)
+
+// Lazy adds a LazyLogger to a Span.LogFields() record; the tracing
+// implementation will call the LazyLogger function at an indefinite time in
+// the future (after Lazy() returns).
+func Lazy(ll LazyLogger) Field {
+	return Field{
+		fieldType:    lazyLoggerType,
+		interfaceVal: ll,
+	}
+}
+
+// Noop creates a no-op log field that should be ignored by the tracer.
+// It can be used to capture optional fields, for example those that should
+// only be logged in non-production environment:
+//
+//     func customerField(order *Order) log.Field {
+//          if os.Getenv("ENVIRONMENT") == "dev" {
+//              return log.String("customer", order.Customer.ID)
+//          }
+//          return log.Noop()
+//     }
+//
+//     span.LogFields(log.String("event", "purchase"), customerField(order))
+//
+func Noop() Field {
+	return Field{
+		fieldType: noopType,
+	}
+}
+
+// Encoder allows access to the contents of a Field (via a call to
+// Field.Marshal).
+//
+// Tracer implementations typically provide an implementation of Encoder;
+// OpenTracing callers typically do not need to concern themselves with it.
+type Encoder interface {
+	EmitString(key, value string)
+	EmitBool(key string, value bool)
+	EmitInt(key string, value int)
+	EmitInt32(key string, value int32)
+	EmitInt64(key string, value int64)
+	EmitUint32(key string, value uint32)
+	EmitUint64(key string, value uint64)
+	EmitFloat32(key string, value float32)
+	EmitFloat64(key string, value float64)
+	EmitObject(key string, value interface{})
+	EmitLazyLogger(value LazyLogger)
+}
+
+// Marshal passes a Field instance through to the appropriate
+// field-type-specific method of an Encoder.
+func (lf Field) Marshal(visitor Encoder) {
+	switch lf.fieldType {
+	case stringType:
+		visitor.EmitString(lf.key, lf.stringVal)
+	case boolType:
+		visitor.EmitBool(lf.key, lf.numericVal != 0)
+	case intType:
+		visitor.EmitInt(lf.key, int(lf.numericVal))
+	case int32Type:
+		visitor.EmitInt32(lf.key, int32(lf.numericVal))
+	case int64Type:
+		visitor.EmitInt64(lf.key, int64(lf.numericVal))
+	case uint32Type:
+		visitor.EmitUint32(lf.key, uint32(lf.numericVal))
+	case uint64Type:
+		visitor.EmitUint64(lf.key, uint64(lf.numericVal))
+	case float32Type:
+		visitor.EmitFloat32(lf.key, math.Float32frombits(uint32(lf.numericVal)))
+	case float64Type:
+		visitor.EmitFloat64(lf.key, math.Float64frombits(uint64(lf.numericVal)))
+	case errorType:
+		if err, ok := lf.interfaceVal.(error); ok {
+			visitor.EmitString(lf.key, err.Error())
+		} else {
+			visitor.EmitString(lf.key, "<nil>")
+		}
+	case objectType:
+		visitor.EmitObject(lf.key, lf.interfaceVal)
+	case lazyLoggerType:
+		visitor.EmitLazyLogger(lf.interfaceVal.(LazyLogger))
+	case noopType:
+		// intentionally left blank
+	}
+}
+
+// Key returns the field's key.
+func (lf Field) Key() string {
+	return lf.key
+}
+
+// Value returns the field's value as interface{}.
+func (lf Field) Value() interface{} {
+	switch lf.fieldType {
+	case stringType:
+		return lf.stringVal
+	case boolType:
+		return lf.numericVal != 0
+	case intType:
+		return int(lf.numericVal)
+	case int32Type:
+		return int32(lf.numericVal)
+	case int64Type:
+		return int64(lf.numericVal)
+	case uint32Type:
+		return uint32(lf.numericVal)
+	case uint64Type:
+		return uint64(lf.numericVal)
+	case float32Type:
+		return math.Float32frombits(uint32(lf.numericVal))
+	case float64Type:
+		return math.Float64frombits(uint64(lf.numericVal))
+	case errorType, objectType, lazyLoggerType:
+		return lf.interfaceVal
+	case noopType:
+		return nil
+	default:
+		return nil
+	}
+}
+
+// String returns a string representation of the key and value.
+func (lf Field) String() string {
+	return fmt.Sprint(lf.key, ":", lf.Value())
+}
diff --git a/vendor/github.com/opentracing/opentracing-go/log/util.go b/vendor/github.com/opentracing/opentracing-go/log/util.go
new file mode 100644
index 000000000..3832feb5c
--- /dev/null
+++ b/vendor/github.com/opentracing/opentracing-go/log/util.go
@@ -0,0 +1,54 @@
+package log
+
+import "fmt"
+
+// InterleavedKVToFields converts keyValues a la Span.LogKV() to a Field slice
+// a la Span.LogFields().
+func InterleavedKVToFields(keyValues ...interface{}) ([]Field, error) {
+	if len(keyValues)%2 != 0 {
+		return nil, fmt.Errorf("non-even keyValues len: %d", len(keyValues))
+	}
+	fields := make([]Field, len(keyValues)/2)
+	for i := 0; i*2 < len(keyValues); i++ {
+		key, ok := keyValues[i*2].(string)
+		if !ok {
+			return nil, fmt.Errorf(
+				"non-string key (pair #%d): %T",
+				i, keyValues[i*2])
+		}
+		switch typedVal := keyValues[i*2+1].(type) {
+		case bool:
+			fields[i] = Bool(key, typedVal)
+		case string:
+			fields[i] = String(key, typedVal)
+		case int:
+			fields[i] = Int(key, typedVal)
+		case int8:
+			fields[i] = Int32(key, int32(typedVal))
+		case int16:
+			fields[i] = Int32(key, int32(typedVal))
+		case int32:
+			fields[i] = Int32(key, typedVal)
+		case int64:
+			fields[i] = Int64(key, typedVal)
+		case uint:
+			fields[i] = Uint64(key, uint64(typedVal))
+		case uint64:
+			fields[i] = Uint64(key, typedVal)
+		case uint8:
+			fields[i] = Uint32(key, uint32(typedVal))
+		case uint16:
+			fields[i] = Uint32(key, uint32(typedVal))
+		case uint32:
+			fields[i] = Uint32(key, typedVal)
+		case float32:
+			fields[i] = Float32(key, typedVal)
+		case float64:
+			fields[i] = Float64(key, typedVal)
+		default:
+			// When in doubt, coerce to a string
+			fields[i] = String(key, fmt.Sprint(typedVal))
+		}
+	}
+	return fields, nil
+}
diff --git a/vendor/github.com/opentracing/opentracing-go/noop.go b/vendor/github.com/opentracing/opentracing-go/noop.go
new file mode 100644
index 000000000..0d32f692c
--- /dev/null
+++ b/vendor/github.com/opentracing/opentracing-go/noop.go
@@ -0,0 +1,64 @@
+package opentracing
+
+import "github.com/opentracing/opentracing-go/log"
+
+// A NoopTracer is a trivial, minimum overhead implementation of Tracer
+// for which all operations are no-ops.
+//
+// The primary use of this implementation is in libraries, such as RPC
+// frameworks, that make tracing an optional feature controlled by the
+// end user. A no-op implementation allows said libraries to use it
+// as the default Tracer and to write instrumentation that does
+// not need to keep checking if the tracer instance is nil.
+//
+// For the same reason, the NoopTracer is the default "global" tracer
+// (see GlobalTracer and SetGlobalTracer functions).
+//
+// WARNING: NoopTracer does not support baggage propagation.
+type NoopTracer struct{}
+
+type noopSpan struct{}
+type noopSpanContext struct{}
+
+var (
+	defaultNoopSpanContext = noopSpanContext{}
+	defaultNoopSpan        = noopSpan{}
+	defaultNoopTracer      = NoopTracer{}
+)
+
+const (
+	emptyString = ""
+)
+
+// noopSpanContext:
+func (n noopSpanContext) ForeachBaggageItem(handler func(k, v string) bool) {}
+
+// noopSpan:
+func (n noopSpan) Context() SpanContext                                  { return defaultNoopSpanContext }
+func (n noopSpan) SetBaggageItem(key, val string) Span                   { return defaultNoopSpan }
+func (n noopSpan) BaggageItem(key string) string                         { return emptyString }
+func (n noopSpan) SetTag(key string, value interface{}) Span             { return n }
+func (n noopSpan) LogFields(fields ...log.Field)                         {}
+func (n noopSpan) LogKV(keyVals ...interface{})                          {}
+func (n noopSpan) Finish()                                               {}
+func (n noopSpan) FinishWithOptions(opts FinishOptions)                  {}
+func (n noopSpan) SetOperationName(operationName string) Span            { return n }
+func (n noopSpan) Tracer() Tracer                                        { return defaultNoopTracer }
+func (n noopSpan) LogEvent(event string)                                 {}
+func (n noopSpan) LogEventWithPayload(event string, payload interface{}) {}
+func (n noopSpan) Log(data LogData)                                      {}
+
+// StartSpan belongs to the Tracer interface.
+func (n NoopTracer) StartSpan(operationName string, opts ...StartSpanOption) Span {
+	return defaultNoopSpan
+}
+
+// Inject belongs to the Tracer interface.
+func (n NoopTracer) Inject(sp SpanContext, format interface{}, carrier interface{}) error {
+	return nil
+}
+
+// Extract belongs to the Tracer interface.
+func (n NoopTracer) Extract(format interface{}, carrier interface{}) (SpanContext, error) {
+	return nil, ErrSpanContextNotFound
+}
diff --git a/vendor/github.com/opentracing/opentracing-go/propagation.go b/vendor/github.com/opentracing/opentracing-go/propagation.go
new file mode 100644
index 000000000..0dd466a37
--- /dev/null
+++ b/vendor/github.com/opentracing/opentracing-go/propagation.go
@@ -0,0 +1,176 @@
+package opentracing
+
+import (
+	"errors"
+	"net/http"
+)
+
+///////////////////////////////////////////////////////////////////////////////
+// CORE PROPAGATION INTERFACES:
+///////////////////////////////////////////////////////////////////////////////
+
+var (
+	// ErrUnsupportedFormat occurs when the `format` passed to Tracer.Inject() or
+	// Tracer.Extract() is not recognized by the Tracer implementation.
+	ErrUnsupportedFormat = errors.New("opentracing: Unknown or unsupported Inject/Extract format")
+
+	// ErrSpanContextNotFound occurs when the `carrier` passed to
+	// Tracer.Extract() is valid and uncorrupted but has insufficient
+	// information to extract a SpanContext.
+	ErrSpanContextNotFound = errors.New("opentracing: SpanContext not found in Extract carrier")
+
+	// ErrInvalidSpanContext errors occur when Tracer.Inject() is asked to
+	// operate on a SpanContext which it is not prepared to handle (for
+	// example, since it was created by a different tracer implementation).
+	ErrInvalidSpanContext = errors.New("opentracing: SpanContext type incompatible with tracer")
+
+	// ErrInvalidCarrier errors occur when Tracer.Inject() or Tracer.Extract()
+	// implementations expect a different type of `carrier` than they are
+	// given.
+	ErrInvalidCarrier = errors.New("opentracing: Invalid Inject/Extract carrier")
+
+	// ErrSpanContextCorrupted occurs when the `carrier` passed to
+	// Tracer.Extract() is of the expected type but is corrupted.
+	ErrSpanContextCorrupted = errors.New("opentracing: SpanContext data corrupted in Extract carrier")
+)
+
+///////////////////////////////////////////////////////////////////////////////
+// BUILTIN PROPAGATION FORMATS:
+///////////////////////////////////////////////////////////////////////////////
+
+// BuiltinFormat is used to demarcate the values within package `opentracing`
+// that are intended for use with the Tracer.Inject() and Tracer.Extract()
+// methods.
+type BuiltinFormat byte
+
+const (
+	// Binary represents SpanContexts as opaque binary data.
+	//
+	// For Tracer.Inject(): the carrier must be an `io.Writer`.
+	//
+	// For Tracer.Extract(): the carrier must be an `io.Reader`.
+	Binary BuiltinFormat = iota
+
+	// TextMap represents SpanContexts as key:value string pairs.
+	//
+	// Unlike HTTPHeaders, the TextMap format does not restrict the key or
+	// value character sets in any way.
+	//
+	// For Tracer.Inject(): the carrier must be a `TextMapWriter`.
+	//
+	// For Tracer.Extract(): the carrier must be a `TextMapReader`.
+	TextMap
+
+	// HTTPHeaders represents SpanContexts as HTTP header string pairs.
+	//
+	// Unlike TextMap, the HTTPHeaders format requires that the keys and values
+	// be valid as HTTP headers as-is (i.e., character casing may be unstable
+	// and special characters are disallowed in keys, values should be
+	// URL-escaped, etc).
+	//
+	// For Tracer.Inject(): the carrier must be a `TextMapWriter`.
+	//
+	// For Tracer.Extract(): the carrier must be a `TextMapReader`.
+	//
+	// See HTTPHeadersCarrier for an implementation of both TextMapWriter
+	// and TextMapReader that defers to an http.Header instance for storage.
+	// For example, Inject():
+	//
+	//    carrier := opentracing.HTTPHeadersCarrier(httpReq.Header)
+	//    err := span.Tracer().Inject(
+	//        span.Context(), opentracing.HTTPHeaders, carrier)
+	//
+	// Or Extract():
+	//
+	//    carrier := opentracing.HTTPHeadersCarrier(httpReq.Header)
+	//    clientContext, err := tracer.Extract(
+	//        opentracing.HTTPHeaders, carrier)
+	//
+	HTTPHeaders
+)
+
+// TextMapWriter is the Inject() carrier for the TextMap builtin format. With
+// it, the caller can encode a SpanContext for propagation as entries in a map
+// of unicode strings.
+type TextMapWriter interface {
+	// Set a key:value pair to the carrier. Multiple calls to Set() for the
+	// same key leads to undefined behavior.
+	//
+	// NOTE: The backing store for the TextMapWriter may contain data unrelated
+	// to SpanContext. As such, Inject() and Extract() implementations that
+	// call the TextMapWriter and TextMapReader interfaces must agree on a
+	// prefix or other convention to distinguish their own key:value pairs.
+	Set(key, val string)
+}
+
+// TextMapReader is the Extract() carrier for the TextMap builtin format. With it,
+// the caller can decode a propagated SpanContext as entries in a map of
+// unicode strings.
+type TextMapReader interface {
+	// ForeachKey returns TextMap contents via repeated calls to the `handler`
+	// function. If any call to `handler` returns a non-nil error, ForeachKey
+	// terminates and returns that error.
+	//
+	// NOTE: The backing store for the TextMapReader may contain data unrelated
+	// to SpanContext. As such, Inject() and Extract() implementations that
+	// call the TextMapWriter and TextMapReader interfaces must agree on a
+	// prefix or other convention to distinguish their own key:value pairs.
+	//
+	// The "foreach" callback pattern reduces unnecessary copying in some cases
+	// and also allows implementations to hold locks while the map is read.
+	ForeachKey(handler func(key, val string) error) error
+}
+
+// TextMapCarrier allows the use of regular map[string]string
+// as both TextMapWriter and TextMapReader.
+type TextMapCarrier map[string]string
+
+// ForeachKey conforms to the TextMapReader interface.
+func (c TextMapCarrier) ForeachKey(handler func(key, val string) error) error {
+	for k, v := range c {
+		if err := handler(k, v); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// Set implements Set() of opentracing.TextMapWriter
+func (c TextMapCarrier) Set(key, val string) {
+	c[key] = val
+}
+
+// HTTPHeadersCarrier satisfies both TextMapWriter and TextMapReader.
+//
+// Example usage for server side:
+//
+//     carrier := opentracing.HTTPHeadersCarrier(httpReq.Header)
+//     clientContext, err := tracer.Extract(opentracing.HTTPHeaders, carrier)
+//
+// Example usage for client side:
+//
+//     carrier := opentracing.HTTPHeadersCarrier(httpReq.Header)
+//     err := tracer.Inject(
+//         span.Context(),
+//         opentracing.HTTPHeaders,
+//         carrier)
+//
+type HTTPHeadersCarrier http.Header
+
+// Set conforms to the TextMapWriter interface.
+func (c HTTPHeadersCarrier) Set(key, val string) {
+	h := http.Header(c)
+	h.Add(key, val)
+}
+
+// ForeachKey conforms to the TextMapReader interface.
+func (c HTTPHeadersCarrier) ForeachKey(handler func(key, val string) error) error {
+	for k, vals := range c {
+		for _, v := range vals {
+			if err := handler(k, v); err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
diff --git a/vendor/github.com/opentracing/opentracing-go/span.go b/vendor/github.com/opentracing/opentracing-go/span.go
new file mode 100644
index 000000000..0d3fb5341
--- /dev/null
+++ b/vendor/github.com/opentracing/opentracing-go/span.go
@@ -0,0 +1,189 @@
+package opentracing
+
+import (
+	"time"
+
+	"github.com/opentracing/opentracing-go/log"
+)
+
+// SpanContext represents Span state that must propagate to descendant Spans and across process
+// boundaries (e.g., a <trace_id, span_id, sampled> tuple).
+type SpanContext interface {
+	// ForeachBaggageItem grants access to all baggage items stored in the
+	// SpanContext.
+	// The handler function will be called for each baggage key/value pair.
+	// The ordering of items is not guaranteed.
+	//
+	// The bool return value indicates if the handler wants to continue iterating
+	// through the rest of the baggage items; for example if the handler is trying to
+	// find some baggage item by pattern matching the name, it can return false
+	// as soon as the item is found to stop further iterations.
+	ForeachBaggageItem(handler func(k, v string) bool)
+}
+
+// Span represents an active, un-finished span in the OpenTracing system.
+//
+// Spans are created by the Tracer interface.
+type Span interface {
+	// Sets the end timestamp and finalizes Span state.
+	//
+	// With the exception of calls to Context() (which are always allowed),
+	// Finish() must be the last call made to any span instance, and to do
+	// otherwise leads to undefined behavior.
+	Finish()
+	// FinishWithOptions is like Finish() but with explicit control over
+	// timestamps and log data.
+	FinishWithOptions(opts FinishOptions)
+
+	// Context() yields the SpanContext for this Span. Note that the return
+	// value of Context() is still valid after a call to Span.Finish(), as is
+	// a call to Span.Context() after a call to Span.Finish().
+	Context() SpanContext
+
+	// Sets or changes the operation name.
+	//
+	// Returns a reference to this Span for chaining.
+	SetOperationName(operationName string) Span
+
+	// Adds a tag to the span.
+	//
+	// If there is a pre-existing tag set for `key`, it is overwritten.
+	//
+	// Tag values can be numeric types, strings, or bools. The behavior of
+	// other tag value types is undefined at the OpenTracing level. If a
+	// tracing system does not know how to handle a particular value type, it
+	// may ignore the tag, but shall not panic.
+	//
+	// Returns a reference to this Span for chaining.
+	SetTag(key string, value interface{}) Span
+
+	// LogFields is an efficient and type-checked way to record key:value
+	// logging data about a Span, though the programming interface is a little
+	// more verbose than LogKV(). Here's an example:
+	//
+	//    span.LogFields(
+	//        log.String("event", "soft error"),
+	//        log.String("type", "cache timeout"),
+	//        log.Int("waited.millis", 1500))
+	//
+	// Also see Span.FinishWithOptions() and FinishOptions.BulkLogData.
+	LogFields(fields ...log.Field)
+
+	// LogKV is a concise, readable way to record key:value logging data about
+	// a Span, though unfortunately this also makes it less efficient and less
+	// type-safe than LogFields(). Here's an example:
+	//
+	//    span.LogKV(
+	//        "event", "soft error",
+	//        "type", "cache timeout",
+	//        "waited.millis", 1500)
+	//
+	// For LogKV (as opposed to LogFields()), the parameters must appear as
+	// key-value pairs, like
+	//
+	//    span.LogKV(key1, val1, key2, val2, key3, val3, ...)
+	//
+	// The keys must all be strings. The values may be strings, numeric types,
+	// bools, Go error instances, or arbitrary structs.
+	//
+	// (Note to implementors: consider the log.InterleavedKVToFields() helper)
+	LogKV(alternatingKeyValues ...interface{})
+
+	// SetBaggageItem sets a key:value pair on this Span and its SpanContext
+	// that also propagates to descendants of this Span.
+	//
+	// SetBaggageItem() enables powerful functionality given a full-stack
+	// opentracing integration (e.g., arbitrary application data from a mobile
+	// app can make it, transparently, all the way into the depths of a storage
+	// system), and with it some powerful costs: use this feature with care.
+	//
+	// IMPORTANT NOTE #1: SetBaggageItem() will only propagate baggage items to
+	// *future* causal descendants of the associated Span.
+	//
+	// IMPORTANT NOTE #2: Use this thoughtfully and with care. Every key and
+	// value is copied into every local *and remote* child of the associated
+	// Span, and that can add up to a lot of network and cpu overhead.
+	//
+	// Returns a reference to this Span for chaining.
+	SetBaggageItem(restrictedKey, value string) Span
+
+	// Gets the value for a baggage item given its key. Returns the empty string
+	// if the value isn't found in this Span.
+	BaggageItem(restrictedKey string) string
+
+	// Provides access to the Tracer that created this Span.
+	Tracer() Tracer
+
+	// Deprecated: use LogFields or LogKV
+	LogEvent(event string)
+	// Deprecated: use LogFields or LogKV
+	LogEventWithPayload(event string, payload interface{})
+	// Deprecated: use LogFields or LogKV
+	Log(data LogData)
+}
+
+// LogRecord is data associated with a single Span log. Every LogRecord
+// instance must specify at least one Field.
+type LogRecord struct {
+	Timestamp time.Time
+	Fields    []log.Field
+}
+
+// FinishOptions allows Span.FinishWithOptions callers to override the finish
+// timestamp and provide log data via a bulk interface.
+type FinishOptions struct {
+	// FinishTime overrides the Span's finish time, or implicitly becomes
+	// time.Now() if FinishTime.IsZero().
+	//
+	// FinishTime must resolve to a timestamp that's >= the Span's StartTime
+	// (per StartSpanOptions).
+	FinishTime time.Time
+
+	// LogRecords allows the caller to specify the contents of many LogFields()
+	// calls with a single slice. May be nil.
+	//
+	// None of the LogRecord.Timestamp values may be .IsZero() (i.e., they must
+	// be set explicitly). Also, they must be >= the Span's start timestamp and
+	// <= the FinishTime (or time.Now() if FinishTime.IsZero()). Otherwise the
+	// behavior of FinishWithOptions() is undefined.
+	//
+	// If specified, the caller hands off ownership of LogRecords at
+	// FinishWithOptions() invocation time.
+	//
+	// If specified, the (deprecated) BulkLogData must be nil or empty.
+	LogRecords []LogRecord
+
+	// BulkLogData is DEPRECATED.
+	BulkLogData []LogData
+}
+
+// LogData is DEPRECATED
+type LogData struct {
+	Timestamp time.Time
+	Event     string
+	Payload   interface{}
+}
+
+// ToLogRecord converts a deprecated LogData to a non-deprecated LogRecord
+func (ld *LogData) ToLogRecord() LogRecord {
+	var literalTimestamp time.Time
+	if ld.Timestamp.IsZero() {
+		literalTimestamp = time.Now()
+	} else {
+		literalTimestamp = ld.Timestamp
+	}
+	rval := LogRecord{
+		Timestamp: literalTimestamp,
+	}
+	if ld.Payload == nil {
+		rval.Fields = []log.Field{
+			log.String("event", ld.Event),
+		}
+	} else {
+		rval.Fields = []log.Field{
+			log.String("event", ld.Event),
+			log.Object("payload", ld.Payload),
+		}
+	}
+	return rval
+}
diff --git a/vendor/github.com/opentracing/opentracing-go/tracer.go b/vendor/github.com/opentracing/opentracing-go/tracer.go
new file mode 100644
index 000000000..7bca1f736
--- /dev/null
+++ b/vendor/github.com/opentracing/opentracing-go/tracer.go
@@ -0,0 +1,305 @@
+package opentracing
+
+import "time"
+
+// Tracer is a simple, thin interface for Span creation and SpanContext
+// propagation.
+type Tracer interface {
+
+	// Create, start, and return a new Span with the given `operationName` and
+	// incorporate the given StartSpanOption `opts`. (Note that `opts` borrows
+	// from the "functional options" pattern, per
+	// http://dave.cheney.net/2014/10/17/functional-options-for-friendly-apis)
+	//
+	// A Span with no SpanReference options (e.g., opentracing.ChildOf() or
+	// opentracing.FollowsFrom()) becomes the root of its own trace.
+	//
+	// Examples:
+	//
+	//     var tracer opentracing.Tracer = ...
+	//
+	//     // The root-span case:
+	//     sp := tracer.StartSpan("GetFeed")
+	//
+	//     // The vanilla child span case:
+	//     sp := tracer.StartSpan(
+	//         "GetFeed",
+	//         opentracing.ChildOf(parentSpan.Context()))
+	//
+	//     // All the bells and whistles:
+	//     sp := tracer.StartSpan(
+	//         "GetFeed",
+	//         opentracing.ChildOf(parentSpan.Context()),
+	//         opentracing.Tag{"user_agent", loggedReq.UserAgent},
+	//         opentracing.StartTime(loggedReq.Timestamp),
+	//     )
+	//
+	StartSpan(operationName string, opts ...StartSpanOption) Span
+
+	// Inject() takes the `sm` SpanContext instance and injects it for
+	// propagation within `carrier`. The actual type of `carrier` depends on
+	// the value of `format`.
+	//
+	// OpenTracing defines a common set of `format` values (see BuiltinFormat),
+	// and each has an expected carrier type.
+	//
+	// Other packages may declare their own `format` values, much like the keys
+	// used by `context.Context` (see
+	// https://godoc.org/golang.org/x/net/context#WithValue).
+	//
+	// Example usage (sans error handling):
+	//
+	//     carrier := opentracing.HTTPHeadersCarrier(httpReq.Header)
+	//     err := tracer.Inject(
+	//         span.Context(),
+	//         opentracing.HTTPHeaders,
+	//         carrier)
+	//
+	// NOTE: All opentracing.Tracer implementations MUST support all
+	// BuiltinFormats.
+	//
+	// Implementations may return opentracing.ErrUnsupportedFormat if `format`
+	// is not supported by (or not known by) the implementation.
+	//
+	// Implementations may return opentracing.ErrInvalidCarrier or any other
+	// implementation-specific error if the format is supported but injection
+	// fails anyway.
+	//
+	// See Tracer.Extract().
+	Inject(sm SpanContext, format interface{}, carrier interface{}) error
+
+	// Extract() returns a SpanContext instance given `format` and `carrier`.
+	//
+	// OpenTracing defines a common set of `format` values (see BuiltinFormat),
+	// and each has an expected carrier type.
+	//
+	// Other packages may declare their own `format` values, much like the keys
+	// used by `context.Context` (see
+	// https://godoc.org/golang.org/x/net/context#WithValue).
+	//
+	// Example usage (with StartSpan):
+	//
+	//
+	//     carrier := opentracing.HTTPHeadersCarrier(httpReq.Header)
+	//     clientContext, err := tracer.Extract(opentracing.HTTPHeaders, carrier)
+	//
+	//     // ... assuming the ultimate goal here is to resume the trace with a
+	//     // server-side Span:
+	//     var serverSpan opentracing.Span
+	//     if err == nil {
+	//         span = tracer.StartSpan(
+	//             rpcMethodName, ext.RPCServerOption(clientContext))
+	//     } else {
+	//         span = tracer.StartSpan(rpcMethodName)
+	//     }
+	//
+	//
+	// NOTE: All opentracing.Tracer implementations MUST support all
+	// BuiltinFormats.
+	//
+	// Return values:
+	//  - A successful Extract returns a SpanContext instance and a nil error
+	//  - If there was simply no SpanContext to extract in `carrier`, Extract()
+	//    returns (nil, opentracing.ErrSpanContextNotFound)
+	//  - If `format` is unsupported or unrecognized, Extract() returns (nil,
+	//    opentracing.ErrUnsupportedFormat)
+	//  - If there are more fundamental problems with the `carrier` object,
+	//    Extract() may return opentracing.ErrInvalidCarrier,
+	//    opentracing.ErrSpanContextCorrupted, or implementation-specific
+	//    errors.
+	//
+	// See Tracer.Inject().
+	Extract(format interface{}, carrier interface{}) (SpanContext, error)
+}
+
+// StartSpanOptions allows Tracer.StartSpan() callers and implementors a
+// mechanism to override the start timestamp, specify Span References, and make
+// a single Tag or multiple Tags available at Span start time.
+//
+// StartSpan() callers should look at the StartSpanOption interface and
+// implementations available in this package.
+//
+// Tracer implementations can convert a slice of `StartSpanOption` instances
+// into a `StartSpanOptions` struct like so:
+//
+//     func StartSpan(opName string, opts ...opentracing.StartSpanOption) {
+//         sso := opentracing.StartSpanOptions{}
+//         for _, o := range opts {
+//             o.Apply(&sso)
+//         }
+//         ...
+//     }
+//
+type StartSpanOptions struct {
+	// Zero or more causal references to other Spans (via their SpanContext).
+	// If empty, start a "root" Span (i.e., start a new trace).
+	References []SpanReference
+
+	// StartTime overrides the Span's start time, or implicitly becomes
+	// time.Now() if StartTime.IsZero().
+	StartTime time.Time
+
+	// Tags may have zero or more entries; the restrictions on map values are
+	// identical to those for Span.SetTag(). May be nil.
+	//
+	// If specified, the caller hands off ownership of Tags at
+	// StartSpan() invocation time.
+	Tags map[string]interface{}
+}
+
+// StartSpanOption instances (zero or more) may be passed to Tracer.StartSpan.
+//
+// StartSpanOption borrows from the "functional options" pattern, per
+// http://dave.cheney.net/2014/10/17/functional-options-for-friendly-apis
+type StartSpanOption interface {
+	Apply(*StartSpanOptions)
+}
+
+// SpanReferenceType is an enum type describing different categories of
+// relationships between two Spans. If Span-2 refers to Span-1, the
+// SpanReferenceType describes Span-1 from Span-2's perspective. For example,
+// ChildOfRef means that Span-1 created Span-2.
+//
+// NOTE: Span-1 and Span-2 do *not* necessarily depend on each other for
+// completion; e.g., Span-2 may be part of a background job enqueued by Span-1,
+// or Span-2 may be sitting in a distributed queue behind Span-1.
+type SpanReferenceType int
+
+const (
+	// ChildOfRef refers to a parent Span that caused *and* somehow depends
+	// upon the new child Span. Often (but not always), the parent Span cannot
+	// finish until the child Span does.
+	//
+	// An timing diagram for a ChildOfRef that's blocked on the new Span:
+	//
+	//     [-Parent Span---------]
+	//          [-Child Span----]
+	//
+	// See http://opentracing.io/spec/
+	//
+	// See opentracing.ChildOf()
+	ChildOfRef SpanReferenceType = iota
+
+	// FollowsFromRef refers to a parent Span that does not depend in any way
+	// on the result of the new child Span. For instance, one might use
+	// FollowsFromRefs to describe pipeline stages separated by queues,
+	// or a fire-and-forget cache insert at the tail end of a web request.
+	//
+	// A FollowsFromRef Span is part of the same logical trace as the new Span:
+	// i.e., the new Span is somehow caused by the work of its FollowsFromRef.
+	//
+	// All of the following could be valid timing diagrams for children that
+	// "FollowFrom" a parent.
+	//
+	//     [-Parent Span-]  [-Child Span-]
+	//
+	//
+	//     [-Parent Span--]
+	//      [-Child Span-]
+	//
+	//
+	//     [-Parent Span-]
+	//                 [-Child Span-]
+	//
+	// See http://opentracing.io/spec/
+	//
+	// See opentracing.FollowsFrom()
+	FollowsFromRef
+)
+
+// SpanReference is a StartSpanOption that pairs a SpanReferenceType and a
+// referenced SpanContext. See the SpanReferenceType documentation for
+// supported relationships.  If SpanReference is created with
+// ReferencedContext==nil, it has no effect. Thus it allows for a more concise
+// syntax for starting spans:
+//
+//     sc, _ := tracer.Extract(someFormat, someCarrier)
+//     span := tracer.StartSpan("operation", opentracing.ChildOf(sc))
+//
+// The `ChildOf(sc)` option above will not panic if sc == nil, it will just
+// not add the parent span reference to the options.
+type SpanReference struct {
+	Type              SpanReferenceType
+	ReferencedContext SpanContext
+}
+
+// Apply satisfies the StartSpanOption interface.
+func (r SpanReference) Apply(o *StartSpanOptions) {
+	if r.ReferencedContext != nil {
+		o.References = append(o.References, r)
+	}
+}
+
+// ChildOf returns a StartSpanOption pointing to a dependent parent span.
+// If sc == nil, the option has no effect.
+//
+// See ChildOfRef, SpanReference
+func ChildOf(sc SpanContext) SpanReference {
+	return SpanReference{
+		Type:              ChildOfRef,
+		ReferencedContext: sc,
+	}
+}
+
+// FollowsFrom returns a StartSpanOption pointing to a parent Span that caused
+// the child Span but does not directly depend on its result in any way.
+// If sc == nil, the option has no effect.
+//
+// See FollowsFromRef, SpanReference
+func FollowsFrom(sc SpanContext) SpanReference {
+	return SpanReference{
+		Type:              FollowsFromRef,
+		ReferencedContext: sc,
+	}
+}
+
+// StartTime is a StartSpanOption that sets an explicit start timestamp for the
+// new Span.
+type StartTime time.Time
+
+// Apply satisfies the StartSpanOption interface.
+func (t StartTime) Apply(o *StartSpanOptions) {
+	o.StartTime = time.Time(t)
+}
+
+// Tags are a generic map from an arbitrary string key to an opaque value type.
+// The underlying tracing system is responsible for interpreting and
+// serializing the values.
+type Tags map[string]interface{}
+
+// Apply satisfies the StartSpanOption interface.
+func (t Tags) Apply(o *StartSpanOptions) {
+	if o.Tags == nil {
+		o.Tags = make(map[string]interface{})
+	}
+	for k, v := range t {
+		o.Tags[k] = v
+	}
+}
+
+// Tag may be passed as a StartSpanOption to add a tag to new spans,
+// or its Set method may be used to apply the tag to an existing Span,
+// for example:
+//
+// tracer.StartSpan("opName", Tag{"Key", value})
+//
+//   or
+//
+// Tag{"key", value}.Set(span)
+type Tag struct {
+	Key   string
+	Value interface{}
+}
+
+// Apply satisfies the StartSpanOption interface.
+func (t Tag) Apply(o *StartSpanOptions) {
+	if o.Tags == nil {
+		o.Tags = make(map[string]interface{})
+	}
+	o.Tags[t.Key] = t.Value
+}
+
+// Set applies the tag to an existing Span.
+func (t Tag) Set(s Span) {
+	s.SetTag(t.Key, t.Value)
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/CHANGELOG.md b/vendor/github.com/uber/jaeger-client-go/CHANGELOG.md
new file mode 100644
index 000000000..28e2c2425
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/CHANGELOG.md
@@ -0,0 +1,186 @@
+Changes by Version
+==================
+
+2.15.0 (unreleased)
+-------------------
+
+- nothing yet
+
+
+2.14.0 (2018-04-30)
+-------------------
+
+- Support throttling for debug traces (#274) <Isaac Hier>
+- Remove dependency on Apache Thrift (#303) <Yuri Shkuro>
+- Remove dependency on tchannel  (#295) (#294) <Yuri Shkuro>
+- Test with Go 1.9 (#298) <Yuri Shkuro>
+
+
+2.13.0 (2018-04-15)
+-------------------
+
+- Use value receiver for config.NewTracer() (#283) <Yuri Shkuro>
+- Lock span during jaeger thrift conversion (#273) <Won Jun Jang>
+- Fix the RemotelyControlledSampler so that it terminates go-routine on Close() (#260) <Scott Kidder> <Yuri Shkuro>
+- Added support for client configuration via env vars (#275) <Juraci Paixão Kröhling>
+- Allow overriding sampler in the Config (#270) <Mike Kabischev>
+
+
+2.12.0 (2018-03-14)
+-------------------
+
+- Use lock when retrieving span.Context() (#268)
+- Add Configuration support for custom Injector and Extractor (#263) <Martin Liu>
+
+
+2.11.2 (2018-01-12)
+-------------------
+
+- Add Gopkg.toml to allow using the lib with `dep`
+
+
+2.11.1 (2018-01-03)
+-------------------
+
+- Do not enqueue spans after Reporter is closed (#235, #245)
+- Change default flush interval to 1sec (#243)
+
+
+2.11.0 (2017-11-27)
+-------------------
+
+- Normalize metric names and tags to be compatible with Prometheus (#222)
+
+
+2.10.0 (2017-11-14)
+-------------------
+
+- Support custom tracing headers (#176)
+- Add BaggageRestrictionManager (#178) and RemoteBaggageRestrictionManager (#182)
+- Do not coerce baggage keys to lower case (#196)
+- Log span name when span cannot be reported (#198)
+- Add option to enable gen128Bit for tracer (#193) and allow custom generator for high bits of trace ID (#219)
+
+
+2.9.0 (2017-07-29)
+------------------
+
+- Pin thrift <= 0.10 (#179)
+- Introduce a parallel interface ContribObserver (#159)
+
+
+2.8.0 (2017-07-05)
+------------------
+
+- Drop `jaeger.` prefix from `jaeger.hostname` process-level tag
+- Add options to set tracer tags
+
+
+2.7.0 (2017-06-21)
+------------------
+
+- Fix rate limiter balance [#135](https://github.com/uber/jaeger-client-go/pull/135) [#140](https://github.com/uber/jaeger-client-go/pull/140)
+- Default client to send Jaeger.thrift [#147](https://github.com/uber/jaeger-client-go/pull/147)
+- Save baggage in span [#153](https://github.com/uber/jaeger-client-go/pull/153)
+- Move reporter.queueLength to the top of the struct to guarantee 64bit alignment [#158](https://github.com/uber/jaeger-client-go/pull/158)
+- Support HTTP transport with jaeger.thrift [#161](https://github.com/uber/jaeger-client-go/pull/161)
+
+
+2.6.0 (2017-03-28)
+------------------
+
+- Add config option to initialize RPC Metrics feature
+
+
+2.5.0 (2017-03-23)
+------------------
+
+- Split request latency metric by success/failure [#123](https://github.com/uber/jaeger-client-go/pull/123)
+- Add mutex to adaptive sampler and fix race condition [#124](https://github.com/uber/jaeger-client-go/pull/124)
+- Fix rate limiter panic [#125](https://github.com/uber/jaeger-client-go/pull/125)
+
+
+2.4.0 (2017-03-21)
+------------------
+
+- Remove `_ms` suffix from request latency metric name [#121](https://github.com/uber/jaeger-client-go/pull/121)
+- Rename all metrics to "request" and "http_request" and use tags for other dimensions [#121](https://github.com/uber/jaeger-client-go/pull/121)
+
+
+2.3.0 (2017-03-20)
+------------------
+
+- Make Span type public to allow access to non-std methods for testing [#117](https://github.com/uber/jaeger-client-go/pull/117)
+- Add a structured way to extract traces for logging with zap [#118](https://github.com/uber/jaeger-client-go/pull/118)
+
+
+2.2.1 (2017-03-14)
+------------------
+
+- Fix panic caused by updating the remote sampler from adaptive sampler to any other sampler type (https://github.com/uber/jaeger-client-go/pull/111)
+
+
+2.2.0 (2017-03-10)
+------------------
+
+- Introduce Observer and SpanObserver (https://github.com/uber/jaeger-client-go/pull/94)
+- Add RPC metrics emitter as Observer/SpanObserver (https://github.com/uber/jaeger-client-go/pull/103)
+
+
+2.1.2 (2017-02-27)
+-------------------
+
+- Fix leaky bucket bug (https://github.com/uber/jaeger-client-go/pull/99)
+- Fix zap logger Infof (https://github.com/uber/jaeger-client-go/pull/100)
+- Add tracer initialization godoc examples
+
+
+2.1.1 (2017-02-21)
+-------------------
+
+- Fix inefficient usage of zap.Logger
+
+
+2.1.0 (2017-02-17)
+-------------------
+
+- Add adapter for zap.Logger (https://github.com/uber-go/zap)
+- Move logging API to ./log/ package
+
+
+2.0.0 (2017-02-08)
+-------------------
+
+- Support Adaptive Sampling
+- Support 128bit Trace IDs
+- Change trace/span IDs from uint64 to strong types TraceID and SpanID
+- Add Zipkin HTTP B3 Propagation format support #72
+- Rip out existing metrics and use github.com/uber/jaeger-lib/metrics
+- Change API for tracer, reporter, sampler initialization
+
+
+1.6.0 (2016-10-14)
+-------------------
+
+- Add Zipkin HTTP transport
+- Support external baggage via jaeger-baggage header
+- Unpin Thrift version, keep to master
+
+
+1.5.1 (2016-09-27)
+-------------------
+
+- Relax dependency on opentracing to ^1
+
+
+1.5.0 (2016-09-27)
+-------------------
+
+- Upgrade to opentracing-go 1.0
+- Support KV logging for Spans
+
+
+1.4.0 (2016-09-14)
+-------------------
+
+- Support debug traces via HTTP header "jaeger-debug-id"
diff --git a/vendor/github.com/uber/jaeger-client-go/CONTRIBUTING.md b/vendor/github.com/uber/jaeger-client-go/CONTRIBUTING.md
new file mode 100644
index 000000000..7cf014a51
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/CONTRIBUTING.md
@@ -0,0 +1,170 @@
+# How to Contribute to Jaeger
+
+We'd love your help!
+
+Jaeger is [Apache 2.0 licensed](LICENSE) and accepts contributions via GitHub
+pull requests. This document outlines some of the conventions on development
+workflow, commit message formatting, contact points and other resources to make
+it easier to get your contribution accepted.
+
+We gratefully welcome improvements to documentation as well as to code.
+
+# Certificate of Origin
+
+By contributing to this project you agree to the [Developer Certificate of
+Origin](https://developercertificate.org/) (DCO). This document was created
+by the Linux Kernel community and is a simple statement that you, as a
+contributor, have the legal right to make the contribution. See the [DCO](DCO)
+file for details.
+
+## Getting Started
+
+This library uses [glide](https://github.com/Masterminds/glide) to manage dependencies.
+
+To get started, make sure you clone the Git repository into the correct location
+`github.com/uber/jaeger-client-go` relative to `$GOPATH`:
+
+```
+mkdir -p $GOPATH/src/github.com/uber
+cd $GOPATH/src/github.com/uber
+git clone git@github.com:jaegertracing/jaeger-client-go.git jaeger-client-go
+cd jaeger-client-go
+```
+
+Then install dependencies and run the tests:
+
+```
+git submodule update --init --recursive
+glide install
+make test
+```
+
+## Imports grouping
+
+This projects follows the following pattern for grouping imports in Go files:
+  * imports from standard library
+  * imports from other projects
+  * imports from `jaeger-client-go` project
+  
+For example:
+
+```go
+import (
+	"fmt"
+ 
+	"github.com/uber/jaeger-lib/metrics"
+	"go.uber.org/zap"
+
+	"github.com/uber/jaeger-client-go/config"
+)
+```
+
+## Making A Change
+
+*Before making any significant changes, please [open an
+issue](https://github.com/jaegertracing/jaeger-client-go/issues).* Discussing your proposed
+changes ahead of time will make the contribution process smooth for everyone.
+
+Once we've discussed your changes and you've got your code ready, make sure
+that tests are passing (`make test` or `make cover`) and open your PR. Your
+pull request is most likely to be accepted if it:
+
+* Includes tests for new functionality.
+* Follows the guidelines in [Effective
+  Go](https://golang.org/doc/effective_go.html) and the [Go team's common code
+  review comments](https://github.com/golang/go/wiki/CodeReviewComments).
+* Has a [good commit message](https://chris.beams.io/posts/git-commit/):
+   * Separate subject from body with a blank line
+   * Limit the subject line to 50 characters
+   * Capitalize the subject line
+   * Do not end the subject line with a period
+   * Use the imperative mood in the subject line
+   * Wrap the body at 72 characters
+   * Use the body to explain _what_ and _why_ instead of _how_
+* Each commit must be signed by the author ([see below](#sign-your-work)).
+
+## License
+
+By contributing your code, you agree to license your contribution under the terms
+of the [Apache License](LICENSE).
+
+If you are adding a new file it should have a header like below.  The easiest
+way to add such header is to run `make fmt`.
+
+```
+// Copyright (c) 2017 The Jaeger Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+```
+
+## Sign your work
+
+The sign-off is a simple line at the end of the explanation for the
+patch, which certifies that you wrote it or otherwise have the right to
+pass it on as an open-source patch.  The rules are pretty simple: if you
+can certify the below (from
+[developercertificate.org](http://developercertificate.org/)):
+
+```
+Developer Certificate of Origin
+Version 1.1
+
+Copyright (C) 2004, 2006 The Linux Foundation and its contributors.
+660 York Street, Suite 102,
+San Francisco, CA 94110 USA
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+
+Developer's Certificate of Origin 1.1
+
+By making a contribution to this project, I certify that:
+
+(a) The contribution was created in whole or in part by me and I
+    have the right to submit it under the open source license
+    indicated in the file; or
+
+(b) The contribution is based upon previous work that, to the best
+    of my knowledge, is covered under an appropriate open source
+    license and I have the right under that license to submit that
+    work with modifications, whether created in whole or in part
+    by me, under the same open source license (unless I am
+    permitted to submit under a different license), as indicated
+    in the file; or
+
+(c) The contribution was provided directly to me by some other
+    person who certified (a), (b) or (c) and I have not modified
+    it.
+
+(d) I understand and agree that this project and the contribution
+    are public and that a record of the contribution (including all
+    personal information I submit with it, including my sign-off) is
+    maintained indefinitely and may be redistributed consistent with
+    this project or the open source license(s) involved.
+```
+
+then you just add a line to every git commit message:
+
+    Signed-off-by: Joe Smith <joe@gmail.com>
+
+using your real name (sorry, no pseudonyms or anonymous contributions.)
+
+You can add the sign off when creating the git commit via `git commit -s`.
+
+If you want this to be automatic you can set up some aliases:
+
+```
+git config --add alias.amend "commit -s --amend"
+git config --add alias.c "commit -s"
+```
diff --git a/vendor/github.com/uber/jaeger-client-go/DCO b/vendor/github.com/uber/jaeger-client-go/DCO
new file mode 100644
index 000000000..068953d4b
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/DCO
@@ -0,0 +1,37 @@
+Developer Certificate of Origin
+Version 1.1
+
+Copyright (C) 2004, 2006 The Linux Foundation and its contributors.
+660 York Street, Suite 102,
+San Francisco, CA 94110 USA
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+
+Developer's Certificate of Origin 1.1
+
+By making a contribution to this project, I certify that:
+
+(a) The contribution was created in whole or in part by me and I
+    have the right to submit it under the open source license
+    indicated in the file; or
+
+(b) The contribution is based upon previous work that, to the best
+    of my knowledge, is covered under an appropriate open source
+    license and I have the right under that license to submit that
+    work with modifications, whether created in whole or in part
+    by me, under the same open source license (unless I am
+    permitted to submit under a different license), as indicated
+    in the file; or
+
+(c) The contribution was provided directly to me by some other
+    person who certified (a), (b) or (c) and I have not modified
+    it.
+
+(d) I understand and agree that this project and the contribution
+    are public and that a record of the contribution (including all
+    personal information I submit with it, including my sign-off) is
+    maintained indefinitely and may be redistributed consistent with
+    this project or the open source license(s) involved.
+
diff --git a/vendor/github.com/uber/jaeger-client-go/Gopkg.lock b/vendor/github.com/uber/jaeger-client-go/Gopkg.lock
new file mode 100644
index 000000000..ec054c6ed
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/Gopkg.lock
@@ -0,0 +1,164 @@
+# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'.
+
+
+[[projects]]
+  branch = "master"
+  name = "github.com/beorn7/perks"
+  packages = ["quantile"]
+  revision = "3a771d992973f24aa725d07868b467d1ddfceafb"
+
+[[projects]]
+  branch = "master"
+  name = "github.com/codahale/hdrhistogram"
+  packages = ["."]
+  revision = "3a0bb77429bd3a61596f5e8a3172445844342120"
+
+[[projects]]
+  branch = "master"
+  name = "github.com/crossdock/crossdock-go"
+  packages = [
+    ".",
+    "assert",
+    "require"
+  ]
+  revision = "049aabb0122b03bc9bd30cab8f3f91fb60166361"
+
+[[projects]]
+  name = "github.com/davecgh/go-spew"
+  packages = ["spew"]
+  revision = "346938d642f2ec3594ed81d874461961cd0faa76"
+  version = "v1.1.0"
+
+[[projects]]
+  name = "github.com/golang/protobuf"
+  packages = ["proto"]
+  revision = "925541529c1fa6821df4e44ce2723319eb2be768"
+  version = "v1.0.0"
+
+[[projects]]
+  name = "github.com/matttproud/golang_protobuf_extensions"
+  packages = ["pbutil"]
+  revision = "3247c84500bff8d9fb6d579d800f20b3e091582c"
+  version = "v1.0.0"
+
+[[projects]]
+  name = "github.com/opentracing/opentracing-go"
+  packages = [
+    ".",
+    "ext",
+    "log"
+  ]
+  revision = "1949ddbfd147afd4d964a9f00b24eb291e0e7c38"
+  version = "v1.0.2"
+
+[[projects]]
+  name = "github.com/pkg/errors"
+  packages = ["."]
+  revision = "645ef00459ed84a119197bfb8d8205042c6df63d"
+  version = "v0.8.0"
+
+[[projects]]
+  name = "github.com/pmezard/go-difflib"
+  packages = ["difflib"]
+  revision = "792786c7400a136282c1664665ae0a8db921c6c2"
+  version = "v1.0.0"
+
+[[projects]]
+  name = "github.com/prometheus/client_golang"
+  packages = ["prometheus"]
+  revision = "c5b7fccd204277076155f10851dad72b76a49317"
+  version = "v0.8.0"
+
+[[projects]]
+  branch = "master"
+  name = "github.com/prometheus/client_model"
+  packages = ["go"]
+  revision = "99fa1f4be8e564e8a6b613da7fa6f46c9edafc6c"
+
+[[projects]]
+  branch = "master"
+  name = "github.com/prometheus/common"
+  packages = [
+    "expfmt",
+    "internal/bitbucket.org/ww/goautoneg",
+    "model"
+  ]
+  revision = "d811d2e9bf898806ecfb6ef6296774b13ffc314c"
+
+[[projects]]
+  branch = "master"
+  name = "github.com/prometheus/procfs"
+  packages = [
+    ".",
+    "internal/util",
+    "nfs",
+    "xfs"
+  ]
+  revision = "8b1c2da0d56deffdbb9e48d4414b4e674bd8083e"
+
+[[projects]]
+  name = "github.com/stretchr/testify"
+  packages = [
+    "assert",
+    "require",
+    "suite"
+  ]
+  revision = "12b6f73e6084dad08a7c6e575284b177ecafbc71"
+  version = "v1.2.1"
+
+[[projects]]
+  name = "github.com/uber-go/atomic"
+  packages = ["."]
+  revision = "8474b86a5a6f79c443ce4b2992817ff32cf208b8"
+  version = "v1.3.1"
+
+[[projects]]
+  name = "github.com/uber/jaeger-lib"
+  packages = [
+    "metrics",
+    "metrics/prometheus",
+    "metrics/testutils"
+  ]
+  revision = "4267858c0679cd4e47cefed8d7f70fd386cfb567"
+  version = "v1.4.0"
+
+[[projects]]
+  name = "go.uber.org/atomic"
+  packages = ["."]
+  revision = "54f72d32435d760d5604f17a82e2435b28dc4ba5"
+  version = "v1.3.0"
+
+[[projects]]
+  name = "go.uber.org/multierr"
+  packages = ["."]
+  revision = "3c4937480c32f4c13a875a1829af76c98ca3d40a"
+  version = "v1.1.0"
+
+[[projects]]
+  name = "go.uber.org/zap"
+  packages = [
+    ".",
+    "buffer",
+    "internal/bufferpool",
+    "internal/color",
+    "internal/exit",
+    "zapcore"
+  ]
+  revision = "eeedf312bc6c57391d84767a4cd413f02a917974"
+  version = "v1.8.0"
+
+[[projects]]
+  branch = "master"
+  name = "golang.org/x/net"
+  packages = [
+    "context",
+    "context/ctxhttp"
+  ]
+  revision = "5f9ae10d9af5b1c89ae6904293b14b064d4ada23"
+
+[solve-meta]
+  analyzer-name = "dep"
+  analyzer-version = 1
+  inputs-digest = "f9dcfaf37a785c5dac1e20c29605eda29a83ba9c6f8842e92960dc94c8c4ff80"
+  solver-name = "gps-cdcl"
+  solver-version = 1
diff --git a/vendor/github.com/uber/jaeger-client-go/Gopkg.toml b/vendor/github.com/uber/jaeger-client-go/Gopkg.toml
new file mode 100644
index 000000000..baf7a6bdf
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/Gopkg.toml
@@ -0,0 +1,27 @@
+[[constraint]]
+  name = "github.com/crossdock/crossdock-go"
+  branch = "master"
+
+[[constraint]]
+  name = "github.com/opentracing/opentracing-go"
+  version = "^1"
+
+[[constraint]]
+  name = "github.com/prometheus/client_golang"
+  version = "0.8.0"
+
+[[constraint]]
+  name = "github.com/stretchr/testify"
+  version = "^1.1.3"
+
+[[constraint]]
+  name = "github.com/uber-go/atomic"
+  version = "^1"
+
+[[constraint]]
+  name = "github.com/uber/jaeger-lib"
+  version = "^1.3"
+
+[[constraint]]
+  name = "go.uber.org/zap"
+  version = "^1"
diff --git a/vendor/github.com/uber/jaeger-client-go/LICENSE b/vendor/github.com/uber/jaeger-client-go/LICENSE
new file mode 100644
index 000000000..261eeb9e9
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/LICENSE
@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
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+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
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+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
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+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
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+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
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+   3. Grant of Patent License. Subject to the terms and conditions of
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+
+      (b) You must cause any modified files to carry prominent notices
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+      (d) If the Work includes a "NOTICE" text file as part of its
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+          notices within Derivative Works that You distribute, alongside
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+          that such additional attribution notices cannot be construed
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+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
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+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
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+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
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+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
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+      Work (including but not limited to damages for loss of goodwill,
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+      other commercial damages or losses), even if such Contributor
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+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
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+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
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+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/vendor/github.com/uber/jaeger-client-go/Makefile b/vendor/github.com/uber/jaeger-client-go/Makefile
new file mode 100644
index 000000000..601cc6514
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/Makefile
@@ -0,0 +1,117 @@
+PROJECT_ROOT=github.com/uber/jaeger-client-go
+PACKAGES := $(shell glide novendor | grep -v -e ./thrift-gen/... -e ./thrift/...)
+# all .go files that don't exist in hidden directories
+ALL_SRC := $(shell find . -name "*.go" | grep -v -e vendor -e thrift-gen -e ./thrift/ \
+        -e ".*/\..*" \
+        -e ".*/_.*" \
+        -e ".*/mocks.*")
+
+-include crossdock/rules.mk
+
+export GO15VENDOREXPERIMENT=1
+
+RACE=-race
+GOTEST=go test -v $(RACE)
+GOLINT=golint
+GOVET=go vet
+GOFMT=gofmt
+FMT_LOG=fmt.log
+LINT_LOG=lint.log
+
+THRIFT_VER=0.9.3
+THRIFT_IMG=thrift:$(THRIFT_VER)
+THRIFT=docker run -v "${PWD}:/data" $(THRIFT_IMG) thrift
+THRIFT_GO_ARGS=thrift_import="github.com/apache/thrift/lib/go/thrift"
+THRIFT_GEN_DIR=thrift-gen
+
+PASS=$(shell printf "\033[32mPASS\033[0m")
+FAIL=$(shell printf "\033[31mFAIL\033[0m")
+COLORIZE=sed ''/PASS/s//$(PASS)/'' | sed ''/FAIL/s//$(FAIL)/''
+
+.DEFAULT_GOAL := test-and-lint
+
+.PHONY: test-and-lint
+test-and-lint: test fmt lint
+
+.PHONY: test
+test:
+	bash -c "set -e; set -o pipefail; $(GOTEST) $(PACKAGES) | $(COLORIZE)"
+
+.PHONY: fmt
+fmt:
+	$(GOFMT) -e -s -l -w $(ALL_SRC)
+	./scripts/updateLicenses.sh
+
+.PHONY: lint
+lint:
+	$(GOVET) $(PACKAGES)
+	@cat /dev/null > $(LINT_LOG)
+	@$(foreach pkg, $(PACKAGES), $(GOLINT) $(pkg) | grep -v crossdock/thrift >> $(LINT_LOG) || true;)
+	@[ ! -s "$(LINT_LOG)" ] || (echo "Lint Failures" | cat - $(LINT_LOG) && false)
+	@$(GOFMT) -e -s -l $(ALL_SRC) > $(FMT_LOG)
+	./scripts/updateLicenses.sh >> $(FMT_LOG)
+	@[ ! -s "$(FMT_LOG)" ] || (echo "go fmt or license check failures, run 'make fmt'" | cat - $(FMT_LOG) && false)
+
+
+.PHONY: install
+install:
+	glide --version || go get github.com/Masterminds/glide
+ifeq ($(USE_DEP),true)
+	dep ensure
+else
+	glide install
+endif
+
+
+.PHONY: cover
+cover:
+	./scripts/cover.sh $(shell go list $(PACKAGES))
+	go tool cover -html=cover.out -o cover.html
+
+
+# This is not part of the regular test target because we don't want to slow it
+# down.
+.PHONY: test-examples
+test-examples:
+	make -C examples
+
+# TODO at the moment we're not generating tchan_*.go files
+thrift: idl-submodule thrift-image
+	$(THRIFT) -o /data --gen go:$(THRIFT_GO_ARGS) --out /data/$(THRIFT_GEN_DIR) /data/idl/thrift/agent.thrift
+	$(THRIFT) -o /data --gen go:$(THRIFT_GO_ARGS) --out /data/$(THRIFT_GEN_DIR) /data/idl/thrift/sampling.thrift
+	$(THRIFT) -o /data --gen go:$(THRIFT_GO_ARGS) --out /data/$(THRIFT_GEN_DIR) /data/idl/thrift/jaeger.thrift
+	$(THRIFT) -o /data --gen go:$(THRIFT_GO_ARGS) --out /data/$(THRIFT_GEN_DIR) /data/idl/thrift/zipkincore.thrift
+	$(THRIFT) -o /data --gen go:$(THRIFT_GO_ARGS) --out /data/$(THRIFT_GEN_DIR) /data/idl/thrift/baggage.thrift
+	$(THRIFT) -o /data --gen go:$(THRIFT_GO_ARGS) --out /data/crossdock/thrift/ /data/idl/thrift/crossdock/tracetest.thrift
+	sed -i '' 's|"zipkincore"|"$(PROJECT_ROOT)/thrift-gen/zipkincore"|g' $(THRIFT_GEN_DIR)/agent/*.go
+	sed -i '' 's|"jaeger"|"$(PROJECT_ROOT)/thrift-gen/jaeger"|g' $(THRIFT_GEN_DIR)/agent/*.go
+	sed -i '' 's|"github.com/apache/thrift/lib/go/thrift"|"github.com/uber/jaeger-client-go/thrift"|g' \
+		$(THRIFT_GEN_DIR)/*/*.go crossdock/thrift/tracetest/*.go
+	rm -rf thrift-gen/*/*-remote
+	rm -rf crossdock/thrift/*/*-remote
+	rm -rf thrift-gen/jaeger/collector.go
+
+idl-submodule:
+	git submodule init
+	git submodule update
+
+thrift-image:
+	$(THRIFT) -version
+
+.PHONY: install-dep-ci
+install-dep-ci:
+	- curl -L -s https://github.com/golang/dep/releases/download/v0.3.2/dep-linux-amd64 -o $$GOPATH/bin/dep
+	- chmod +x $$GOPATH/bin/dep
+
+.PHONY: install-ci
+install-ci: install-dep-ci install
+	go get github.com/wadey/gocovmerge
+	go get github.com/mattn/goveralls
+	go get golang.org/x/tools/cmd/cover
+	go get github.com/golang/lint/golint
+
+.PHONY: test-ci
+test-ci:
+	@./scripts/cover.sh $(shell go list $(PACKAGES))
+	make lint
+
diff --git a/vendor/github.com/uber/jaeger-client-go/README.md b/vendor/github.com/uber/jaeger-client-go/README.md
new file mode 100644
index 000000000..16b04454e
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/README.md
@@ -0,0 +1,260 @@
+[![GoDoc][doc-img]][doc] [![Build Status][ci-img]][ci] [![Coverage Status][cov-img]][cov] [![OpenTracing 1.0 Enabled][ot-img]][ot-url]
+
+# Jaeger Bindings for Go OpenTracing API
+
+Instrumentation library that implements an
+[OpenTracing](http://opentracing.io) Tracer for Jaeger (https://jaegertracing.io).
+
+**IMPORTANT**: The library's import path is based on its original location under `github.com/uber`. Do not try to import it as `github.com/jaegertracing`, it will not compile. We might revisit this in the next major release.
+  * :white_check_mark: `import "github.com/uber/jaeger-client-go"`
+  * :x: `import "github.com/jaegertracing/jaeger-client-go"`
+
+## How to Contribute
+
+Please see [CONTRIBUTING.md](CONTRIBUTING.md).
+
+## Installation
+
+We recommended using a dependency manager like [glide](https://github.com/Masterminds/glide)
+and [semantic versioning](http://semver.org/) when including this library into an application.
+For example, Jaeger backend imports this library like this:
+
+```yaml
+- package: github.com/uber/jaeger-client-go
+  version: ^2.7.0
+```
+
+If you instead want to use the latest version in `master`, you can pull it via `go get`.
+Note that during `go get` you may see build errors due to incompatible dependencies, which is why
+we recommend using semantic versions for dependencies.  The error  may be fixed by running
+`make install` (it will install `glide` if you don't have it):
+
+```shell
+go get -u github.com/uber/jaeger-client-go/
+cd $GOPATH/src/github.com/uber/jaeger-client-go/
+git submodule update --init --recursive
+make install
+```
+
+## Initialization
+
+See tracer initialization examples in [godoc](https://godoc.org/github.com/uber/jaeger-client-go/config#pkg-examples)
+and [config/example_test.go](./config/example_test.go).
+
+### Environment variables
+
+The tracer can be initialized with values coming from environment variables. None of the env vars are required
+and all of them can be overriden via direct setting of the property on the configuration object.
+
+Property| Description
+--- | ---
+JAEGER_SERVICE_NAME | The service name
+JAEGER_AGENT_HOST | The hostname for communicating with agent via UDP
+JAEGER_AGENT_PORT | The port for communicating with agent via UDP
+JAEGER_REPORTER_LOG_SPANS | Whether the reporter should also log the spans
+JAEGER_REPORTER_MAX_QUEUE_SIZE | The reporter's maximum queue size
+JAEGER_REPORTER_FLUSH_INTERVAL | The reporter's flush interval (ms)
+JAEGER_SAMPLER_TYPE | The sampler type
+JAEGER_SAMPLER_PARAM | The sampler parameter (number)
+JAEGER_SAMPLER_MANAGER_HOST_PORT | The host name and port when using the remote controlled sampler
+JAEGER_SAMPLER_MAX_OPERATIONS | The maximum number of operations that the sampler will keep track of
+JAEGER_SAMPLER_REFRESH_INTERVAL | How often the remotely controlled sampler will poll jaeger-agent for the appropriate sampling strategy
+JAEGER_TAGS | A comma separated list of `name = value` tracer level tags, which get added to all reported spans. The value can also refer to an environment variable using the format `${envVarName:default}`, where the `:default` is optional, and identifies a value to be used if the environment variable cannot be found
+JAEGER_DISABLED | Whether the tracer is disabled or not. If true, the default `opentracing.NoopTracer` is used.
+JAEGER_RPC_METRICS | Whether to store RPC metrics
+
+### Closing the tracer via `io.Closer`
+
+The constructor function for Jaeger Tracer returns the tracer itself and an `io.Closer` instance.
+It is recommended to structure your `main()` so that it calls the `Close()` function on the closer
+before exiting, e.g.
+
+```go
+tracer, closer, err := cfg.NewTracer(...)
+defer closer.Close()
+```
+
+This is especially useful for command-line tools that enable tracing, as well as
+for the long-running apps that support graceful shutdown. For example, if your deployment
+system sends SIGTERM instead of killing the process and you trap that signal to do a graceful
+exit, then having `defer closer.Closer()` ensures that all buffered spans are flushed.
+
+### Metrics & Monitoring
+
+The tracer emits a number of different metrics, defined in
+[metrics.go](metrics.go). The monitoring backend is expected to support
+tag-based metric names, e.g. instead of `statsd`-style string names
+like `counters.my-service.jaeger.spans.started.sampled`, the metrics
+are defined by a short name and a collection of key/value tags, for
+example: `name:jaeger.traces, state:started, sampled:y`. See [metrics.go](./metrics.go)
+file for the full list and descriptions of emitted metrics.
+
+The monitoring backend is represented by the `metrics.Factory` interface from package
+[`"github.com/uber/jaeger-lib/metrics"`](https://github.com/jaegertracing/jaeger-lib/tree/master/metrics).  An implementation
+of that interface can be passed as an option to either the Configuration object or the Tracer
+constructor, for example:
+
+```go
+import (
+    "github.com/uber/jaeger-client-go/config"
+    "github.com/uber/jaeger-lib/metrics/prometheus"
+)
+
+    metricsFactory := prometheus.New()
+    tracer, closer, err := config.Configuration{
+        ServiceName: "your-service-name",
+    }.NewTracer(
+        config.Metrics(metricsFactory),
+    )
+```
+
+By default, a no-op `metrics.NullFactory` is used.
+
+### Logging
+
+The tracer can be configured with an optional logger, which will be
+used to log communication errors, or log spans if a logging reporter
+option is specified in the configuration. The logging API is abstracted
+by the [Logger](logger.go) interface. A logger instance implementing
+this interface can be set on the `Config` object before calling the
+`New` method.
+
+Besides the [zap](https://github.com/uber-go/zap) implementation
+bundled with this package there is also a [go-kit](https://github.com/go-kit/kit)
+one in the [jaeger-lib](https://github.com/jaegertracing/jaeger-lib) repository.
+
+## Instrumentation for Tracing
+
+Since this tracer is fully compliant with OpenTracing API 1.0,
+all code instrumentation should only use the API itself, as described
+in the [opentracing-go](https://github.com/opentracing/opentracing-go) documentation.
+
+## Features
+
+### Reporters
+
+A "reporter" is a component that receives the finished spans and reports
+them to somewhere. Under normal circumstances, the Tracer
+should use the default `RemoteReporter`, which sends the spans out of
+process via configurable "transport". For testing purposes, one can
+use an `InMemoryReporter` that accumulates spans in a buffer and
+allows to retrieve them for later verification. Also available are
+`NullReporter`, a no-op reporter that does nothing, a `LoggingReporter`
+which logs all finished spans using their `String()` method, and a
+`CompositeReporter` that can be used to combine more than one reporter
+into one, e.g. to attach a logging reporter to the main remote reporter.
+
+### Span Reporting Transports
+
+The remote reporter uses "transports" to actually send the spans out
+of process. Currently the supported transports include:
+  * [Jaeger Thrift](https://github.com/jaegertracing/jaeger-idl/blob/master/thrift/agent.thrift) over UDP or HTTP,
+  * [Zipkin Thrift](https://github.com/jaegertracing/jaeger-idl/blob/master/thrift/zipkincore.thrift) over HTTP.
+
+### Sampling
+
+The tracer does not record all spans, but only those that have the
+sampling bit set in the `flags`. When a new trace is started and a new
+unique ID is generated, a sampling decision is made whether this trace
+should be sampled. The sampling decision is propagated to all downstream
+calls via the `flags` field of the trace context. The following samplers
+are available:
+  1. `RemotelyControlledSampler` uses one of the other simpler samplers
+     and periodically updates it by polling an external server. This
+     allows dynamic control of the sampling strategies.
+  1. `ConstSampler` always makes the same sampling decision for all
+     trace IDs. it can be configured to either sample all traces, or
+     to sample none.
+  1. `ProbabilisticSampler` uses a fixed sampling rate as a probability
+     for a given trace to be sampled. The actual decision is made by
+     comparing the trace ID with a random number multiplied by the
+     sampling rate.
+  1. `RateLimitingSampler` can be used to allow only a certain fixed
+     number of traces to be sampled per second.
+
+### Baggage Injection
+
+The OpenTracing spec allows for [baggage][baggage], which are key value pairs that are added
+to the span context and propagated throughout the trace. An external process can inject baggage
+by setting the special HTTP Header `jaeger-baggage` on a request:
+
+```sh
+curl -H "jaeger-baggage: key1=value1, key2=value2" http://myhost.com
+```
+
+Baggage can also be programatically set inside your service:
+
+```go
+if span := opentracing.SpanFromContext(ctx); span != nil {
+    span.SetBaggageItem("key", "value")
+}
+```
+
+Another service downstream of that can retrieve the baggage in a similar way:
+
+```go
+if span := opentracing.SpanFromContext(ctx); span != nil {
+    val := span.BaggageItem("key")
+    println(val)
+}
+```
+
+### Debug Traces (Forced Sampling)
+
+#### Programmatically
+
+The OpenTracing API defines a `sampling.priority` standard tag that
+can be used to affect the sampling of a span and its children:
+
+```go
+import (
+    "github.com/opentracing/opentracing-go"
+    "github.com/opentracing/opentracing-go/ext"
+)
+
+span := opentracing.SpanFromContext(ctx)
+ext.SamplingPriority.Set(span, 1)    
+```
+
+#### Via HTTP Headers
+
+Jaeger Tracer also understands a special HTTP Header `jaeger-debug-id`,
+which can be set in the incoming request, e.g.
+
+```sh
+curl -H "jaeger-debug-id: some-correlation-id" http://myhost.com
+```
+
+When Jaeger sees this header in the request that otherwise has no
+tracing context, it ensures that the new trace started for this
+request will be sampled in the "debug" mode (meaning it should survive
+all downsampling that might happen in the collection pipeline), and the
+root span will have a tag as if this statement was executed:
+
+```go
+span.SetTag("jaeger-debug-id", "some-correlation-id")
+```
+
+This allows using Jaeger UI to find the trace by this tag.
+
+### Zipkin HTTP B3 compatible header propagation
+
+Jaeger Tracer supports Zipkin B3 Propagation HTTP headers, which are used
+by a lot of Zipkin tracers. This means that you can use Jaeger in conjunction with e.g. [these OpenZipkin tracers](https://github.com/openzipkin).
+
+However it is not the default propagation format, see [here](zipkin/README.md#NewZipkinB3HTTPHeaderPropagator) how to set it up.
+
+## License
+
+[Apache 2.0 License](LICENSE).
+
+
+[doc-img]: https://godoc.org/github.com/uber/jaeger-client-go?status.svg
+[doc]: https://godoc.org/github.com/uber/jaeger-client-go
+[ci-img]: https://travis-ci.org/jaegertracing/jaeger-client-go.svg?branch=master
+[ci]: https://travis-ci.org/jaegertracing/jaeger-client-go
+[cov-img]: https://codecov.io/gh/jaegertracing/jaeger-client-go/branch/master/graph/badge.svg
+[cov]: https://codecov.io/gh/jaegertracing/jaeger-client-go
+[ot-img]: https://img.shields.io/badge/OpenTracing--1.0-enabled-blue.svg
+[ot-url]: http://opentracing.io
+[baggage]: https://github.com/opentracing/specification/blob/master/specification.md#set-a-baggage-item
diff --git a/vendor/github.com/uber/jaeger-client-go/RELEASE.md b/vendor/github.com/uber/jaeger-client-go/RELEASE.md
new file mode 100644
index 000000000..115e49ab8
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/RELEASE.md
@@ -0,0 +1,11 @@
+# Release Process
+
+1. Create a PR "Preparing for release X.Y.Z" against master branch
+    * Alter CHANGELOG.md from `<placeholder_version> (unreleased)` to `<X.Y.Z> (YYYY-MM-DD)`
+    * Update `JaegerClientVersion` in constants.go to `Go-X.Y.Z`
+2. Create a release "Release X.Y.Z" on Github
+    * Create Tag `vX.Y.Z`
+    * Copy CHANGELOG.md into the release notes
+3. Create a PR "Back to development" against master branch
+    * Add `<next_version> (unreleased)` to CHANGELOG.md
+    * Update `JaegerClientVersion` in constants.go to `Go-<next_version>dev`
diff --git a/vendor/github.com/uber/jaeger-client-go/baggage_setter.go b/vendor/github.com/uber/jaeger-client-go/baggage_setter.go
new file mode 100644
index 000000000..1037ca0e8
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/baggage_setter.go
@@ -0,0 +1,77 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"github.com/opentracing/opentracing-go/log"
+
+	"github.com/uber/jaeger-client-go/internal/baggage"
+)
+
+// baggageSetter is an actor that can set a baggage value on a Span given certain
+// restrictions (eg. maxValueLength).
+type baggageSetter struct {
+	restrictionManager baggage.RestrictionManager
+	metrics            *Metrics
+}
+
+func newBaggageSetter(restrictionManager baggage.RestrictionManager, metrics *Metrics) *baggageSetter {
+	return &baggageSetter{
+		restrictionManager: restrictionManager,
+		metrics:            metrics,
+	}
+}
+
+// (NB) span should hold the lock before making this call
+func (s *baggageSetter) setBaggage(span *Span, key, value string) {
+	var truncated bool
+	var prevItem string
+	restriction := s.restrictionManager.GetRestriction(span.serviceName(), key)
+	if !restriction.KeyAllowed() {
+		s.logFields(span, key, value, prevItem, truncated, restriction.KeyAllowed())
+		s.metrics.BaggageUpdateFailure.Inc(1)
+		return
+	}
+	if len(value) > restriction.MaxValueLength() {
+		truncated = true
+		value = value[:restriction.MaxValueLength()]
+		s.metrics.BaggageTruncate.Inc(1)
+	}
+	prevItem = span.context.baggage[key]
+	s.logFields(span, key, value, prevItem, truncated, restriction.KeyAllowed())
+	span.context = span.context.WithBaggageItem(key, value)
+	s.metrics.BaggageUpdateSuccess.Inc(1)
+}
+
+func (s *baggageSetter) logFields(span *Span, key, value, prevItem string, truncated, valid bool) {
+	if !span.context.IsSampled() {
+		return
+	}
+	fields := []log.Field{
+		log.String("event", "baggage"),
+		log.String("key", key),
+		log.String("value", value),
+	}
+	if prevItem != "" {
+		fields = append(fields, log.String("override", "true"))
+	}
+	if truncated {
+		fields = append(fields, log.String("truncated", "true"))
+	}
+	if !valid {
+		fields = append(fields, log.String("invalid", "true"))
+	}
+	span.logFieldsNoLocking(fields...)
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/config/config.go b/vendor/github.com/uber/jaeger-client-go/config/config.go
new file mode 100644
index 000000000..1eb296778
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/config/config.go
@@ -0,0 +1,373 @@
+// Copyright (c) 2017-2018 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package config
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"strings"
+	"time"
+
+	"github.com/opentracing/opentracing-go"
+
+	"github.com/uber/jaeger-client-go"
+	"github.com/uber/jaeger-client-go/internal/baggage/remote"
+	throttler "github.com/uber/jaeger-client-go/internal/throttler/remote"
+	"github.com/uber/jaeger-client-go/rpcmetrics"
+)
+
+const defaultSamplingProbability = 0.001
+
+// Configuration configures and creates Jaeger Tracer
+type Configuration struct {
+	// ServiceName specifies the service name to use on the tracer.
+	// Can be provided via environment variable named JAEGER_SERVICE_NAME
+	ServiceName string `yaml:"serviceName"`
+
+	// Disabled can be provided via environment variable named JAEGER_DISABLED
+	Disabled bool `yaml:"disabled"`
+
+	// RPCMetrics can be provided via environment variable named JAEGER_RPC_METRICS
+	RPCMetrics bool `yaml:"rpc_metrics"`
+
+	// Tags can be provided via environment variable named JAEGER_TAGS
+	Tags []opentracing.Tag `yaml:"tags"`
+
+	Sampler             *SamplerConfig             `yaml:"sampler"`
+	Reporter            *ReporterConfig            `yaml:"reporter"`
+	Headers             *jaeger.HeadersConfig      `yaml:"headers"`
+	BaggageRestrictions *BaggageRestrictionsConfig `yaml:"baggage_restrictions"`
+	Throttler           *ThrottlerConfig           `yaml:"throttler"`
+}
+
+// SamplerConfig allows initializing a non-default sampler.  All fields are optional.
+type SamplerConfig struct {
+	// Type specifies the type of the sampler: const, probabilistic, rateLimiting, or remote
+	// Can be set by exporting an environment variable named JAEGER_SAMPLER_TYPE
+	Type string `yaml:"type"`
+
+	// Param is a value passed to the sampler.
+	// Valid values for Param field are:
+	// - for "const" sampler, 0 or 1 for always false/true respectively
+	// - for "probabilistic" sampler, a probability between 0 and 1
+	// - for "rateLimiting" sampler, the number of spans per second
+	// - for "remote" sampler, param is the same as for "probabilistic"
+	//   and indicates the initial sampling rate before the actual one
+	//   is received from the mothership.
+	// Can be set by exporting an environment variable named JAEGER_SAMPLER_PARAM
+	Param float64 `yaml:"param"`
+
+	// SamplingServerURL is the address of jaeger-agent's HTTP sampling server
+	// Can be set by exporting an environment variable named JAEGER_SAMPLER_MANAGER_HOST_PORT
+	SamplingServerURL string `yaml:"samplingServerURL"`
+
+	// MaxOperations is the maximum number of operations that the sampler
+	// will keep track of. If an operation is not tracked, a default probabilistic
+	// sampler will be used rather than the per operation specific sampler.
+	// Can be set by exporting an environment variable named JAEGER_SAMPLER_MAX_OPERATIONS
+	MaxOperations int `yaml:"maxOperations"`
+
+	// SamplingRefreshInterval controls how often the remotely controlled sampler will poll
+	// jaeger-agent for the appropriate sampling strategy.
+	// Can be set by exporting an environment variable named JAEGER_SAMPLER_REFRESH_INTERVAL
+	SamplingRefreshInterval time.Duration `yaml:"samplingRefreshInterval"`
+}
+
+// ReporterConfig configures the reporter. All fields are optional.
+type ReporterConfig struct {
+	// QueueSize controls how many spans the reporter can keep in memory before it starts dropping
+	// new spans. The queue is continuously drained by a background go-routine, as fast as spans
+	// can be sent out of process.
+	// Can be set by exporting an environment variable named JAEGER_REPORTER_MAX_QUEUE_SIZE
+	QueueSize int `yaml:"queueSize"`
+
+	// BufferFlushInterval controls how often the buffer is force-flushed, even if it's not full.
+	// It is generally not useful, as it only matters for very low traffic services.
+	// Can be set by exporting an environment variable named JAEGER_REPORTER_FLUSH_INTERVAL
+	BufferFlushInterval time.Duration
+
+	// LogSpans, when true, enables LoggingReporter that runs in parallel with the main reporter
+	// and logs all submitted spans. Main Configuration.Logger must be initialized in the code
+	// for this option to have any effect.
+	// Can be set by exporting an environment variable named JAEGER_REPORTER_LOG_SPANS
+	LogSpans bool `yaml:"logSpans"`
+
+	// LocalAgentHostPort instructs reporter to send spans to jaeger-agent at this address
+	// Can be set by exporting an environment variable named JAEGER_AGENT_HOST / JAEGER_AGENT_PORT
+	LocalAgentHostPort string `yaml:"localAgentHostPort"`
+}
+
+// BaggageRestrictionsConfig configures the baggage restrictions manager which can be used to whitelist
+// certain baggage keys. All fields are optional.
+type BaggageRestrictionsConfig struct {
+	// DenyBaggageOnInitializationFailure controls the startup failure mode of the baggage restriction
+	// manager. If true, the manager will not allow any baggage to be written until baggage restrictions have
+	// been retrieved from jaeger-agent. If false, the manager wil allow any baggage to be written until baggage
+	// restrictions have been retrieved from jaeger-agent.
+	DenyBaggageOnInitializationFailure bool `yaml:"denyBaggageOnInitializationFailure"`
+
+	// HostPort is the hostPort of jaeger-agent's baggage restrictions server
+	HostPort string `yaml:"hostPort"`
+
+	// RefreshInterval controls how often the baggage restriction manager will poll
+	// jaeger-agent for the most recent baggage restrictions.
+	RefreshInterval time.Duration `yaml:"refreshInterval"`
+}
+
+// ThrottlerConfig configures the throttler which can be used to throttle the
+// rate at which the client may send debug requests.
+type ThrottlerConfig struct {
+	// HostPort of jaeger-agent's credit server.
+	HostPort string `yaml:"hostPort"`
+
+	// RefreshInterval controls how often the throttler will poll jaeger-agent
+	// for more throttling credits.
+	RefreshInterval time.Duration `yaml:"refreshInterval"`
+
+	// SynchronousInitialization determines whether or not the throttler should
+	// synchronously fetch credits from the agent when an operation is seen for
+	// the first time. This should be set to true if the client will be used by
+	// a short lived service that needs to ensure that credits are fetched
+	// upfront such that sampling or throttling occurs.
+	SynchronousInitialization bool `yaml:"synchronousInitialization"`
+}
+
+type nullCloser struct{}
+
+func (*nullCloser) Close() error { return nil }
+
+// New creates a new Jaeger Tracer, and a closer func that can be used to flush buffers
+// before shutdown.
+//
+// Deprecated: use NewTracer() function
+func (c Configuration) New(
+	serviceName string,
+	options ...Option,
+) (opentracing.Tracer, io.Closer, error) {
+	if serviceName != "" {
+		c.ServiceName = serviceName
+	}
+
+	return c.NewTracer(options...)
+}
+
+// NewTracer returns a new tracer based on the current configuration, using the given options,
+// and a closer func that can be used to flush buffers before shutdown.
+func (c Configuration) NewTracer(options ...Option) (opentracing.Tracer, io.Closer, error) {
+	if c.ServiceName == "" {
+		return nil, nil, errors.New("no service name provided")
+	}
+
+	if c.Disabled {
+		return &opentracing.NoopTracer{}, &nullCloser{}, nil
+	}
+	opts := applyOptions(options...)
+	tracerMetrics := jaeger.NewMetrics(opts.metrics, nil)
+	if c.RPCMetrics {
+		Observer(
+			rpcmetrics.NewObserver(
+				opts.metrics.Namespace("jaeger-rpc", map[string]string{"component": "jaeger"}),
+				rpcmetrics.DefaultNameNormalizer,
+			),
+		)(&opts) // adds to c.observers
+	}
+	if c.Sampler == nil {
+		c.Sampler = &SamplerConfig{
+			Type:  jaeger.SamplerTypeRemote,
+			Param: defaultSamplingProbability,
+		}
+	}
+	if c.Reporter == nil {
+		c.Reporter = &ReporterConfig{}
+	}
+
+	sampler := opts.sampler
+	if sampler == nil {
+		s, err := c.Sampler.NewSampler(c.ServiceName, tracerMetrics)
+		if err != nil {
+			return nil, nil, err
+		}
+		sampler = s
+	}
+
+	reporter := opts.reporter
+	if reporter == nil {
+		r, err := c.Reporter.NewReporter(c.ServiceName, tracerMetrics, opts.logger)
+		if err != nil {
+			return nil, nil, err
+		}
+		reporter = r
+	}
+
+	tracerOptions := []jaeger.TracerOption{
+		jaeger.TracerOptions.Metrics(tracerMetrics),
+		jaeger.TracerOptions.Logger(opts.logger),
+		jaeger.TracerOptions.CustomHeaderKeys(c.Headers),
+		jaeger.TracerOptions.Gen128Bit(opts.gen128Bit),
+		jaeger.TracerOptions.ZipkinSharedRPCSpan(opts.zipkinSharedRPCSpan),
+		jaeger.TracerOptions.MaxTagValueLength(opts.maxTagValueLength),
+	}
+
+	for _, tag := range opts.tags {
+		tracerOptions = append(tracerOptions, jaeger.TracerOptions.Tag(tag.Key, tag.Value))
+	}
+
+	for _, tag := range c.Tags {
+		tracerOptions = append(tracerOptions, jaeger.TracerOptions.Tag(tag.Key, tag.Value))
+	}
+
+	for _, obs := range opts.observers {
+		tracerOptions = append(tracerOptions, jaeger.TracerOptions.Observer(obs))
+	}
+
+	for _, cobs := range opts.contribObservers {
+		tracerOptions = append(tracerOptions, jaeger.TracerOptions.ContribObserver(cobs))
+	}
+
+	for format, injector := range opts.injectors {
+		tracerOptions = append(tracerOptions, jaeger.TracerOptions.Injector(format, injector))
+	}
+
+	for format, extractor := range opts.extractors {
+		tracerOptions = append(tracerOptions, jaeger.TracerOptions.Extractor(format, extractor))
+	}
+
+	if c.BaggageRestrictions != nil {
+		mgr := remote.NewRestrictionManager(
+			c.ServiceName,
+			remote.Options.Metrics(tracerMetrics),
+			remote.Options.Logger(opts.logger),
+			remote.Options.HostPort(c.BaggageRestrictions.HostPort),
+			remote.Options.RefreshInterval(c.BaggageRestrictions.RefreshInterval),
+			remote.Options.DenyBaggageOnInitializationFailure(
+				c.BaggageRestrictions.DenyBaggageOnInitializationFailure,
+			),
+		)
+		tracerOptions = append(tracerOptions, jaeger.TracerOptions.BaggageRestrictionManager(mgr))
+	}
+
+	if c.Throttler != nil {
+		debugThrottler := throttler.NewThrottler(
+			c.ServiceName,
+			throttler.Options.Metrics(tracerMetrics),
+			throttler.Options.Logger(opts.logger),
+			throttler.Options.HostPort(c.Throttler.HostPort),
+			throttler.Options.RefreshInterval(c.Throttler.RefreshInterval),
+			throttler.Options.SynchronousInitialization(
+				c.Throttler.SynchronousInitialization,
+			),
+		)
+
+		tracerOptions = append(tracerOptions, jaeger.TracerOptions.DebugThrottler(debugThrottler))
+	}
+
+	tracer, closer := jaeger.NewTracer(
+		c.ServiceName,
+		sampler,
+		reporter,
+		tracerOptions...,
+	)
+
+	return tracer, closer, nil
+}
+
+// InitGlobalTracer creates a new Jaeger Tracer, and sets it as global OpenTracing Tracer.
+// It returns a closer func that can be used to flush buffers before shutdown.
+func (c Configuration) InitGlobalTracer(
+	serviceName string,
+	options ...Option,
+) (io.Closer, error) {
+	if c.Disabled {
+		return &nullCloser{}, nil
+	}
+	tracer, closer, err := c.New(serviceName, options...)
+	if err != nil {
+		return nil, err
+	}
+	opentracing.SetGlobalTracer(tracer)
+	return closer, nil
+}
+
+// NewSampler creates a new sampler based on the configuration
+func (sc *SamplerConfig) NewSampler(
+	serviceName string,
+	metrics *jaeger.Metrics,
+) (jaeger.Sampler, error) {
+	samplerType := strings.ToLower(sc.Type)
+	if samplerType == jaeger.SamplerTypeConst {
+		return jaeger.NewConstSampler(sc.Param != 0), nil
+	}
+	if samplerType == jaeger.SamplerTypeProbabilistic {
+		if sc.Param >= 0 && sc.Param <= 1.0 {
+			return jaeger.NewProbabilisticSampler(sc.Param)
+		}
+		return nil, fmt.Errorf(
+			"Invalid Param for probabilistic sampler: %v. Expecting value between 0 and 1",
+			sc.Param,
+		)
+	}
+	if samplerType == jaeger.SamplerTypeRateLimiting {
+		return jaeger.NewRateLimitingSampler(sc.Param), nil
+	}
+	if samplerType == jaeger.SamplerTypeRemote || sc.Type == "" {
+		sc2 := *sc
+		sc2.Type = jaeger.SamplerTypeProbabilistic
+		initSampler, err := sc2.NewSampler(serviceName, nil)
+		if err != nil {
+			return nil, err
+		}
+		options := []jaeger.SamplerOption{
+			jaeger.SamplerOptions.Metrics(metrics),
+			jaeger.SamplerOptions.InitialSampler(initSampler),
+			jaeger.SamplerOptions.SamplingServerURL(sc.SamplingServerURL),
+		}
+		if sc.MaxOperations != 0 {
+			options = append(options, jaeger.SamplerOptions.MaxOperations(sc.MaxOperations))
+		}
+		if sc.SamplingRefreshInterval != 0 {
+			options = append(options, jaeger.SamplerOptions.SamplingRefreshInterval(sc.SamplingRefreshInterval))
+		}
+		return jaeger.NewRemotelyControlledSampler(serviceName, options...), nil
+	}
+	return nil, fmt.Errorf("Unknown sampler type %v", sc.Type)
+}
+
+// NewReporter instantiates a new reporter that submits spans to tcollector
+func (rc *ReporterConfig) NewReporter(
+	serviceName string,
+	metrics *jaeger.Metrics,
+	logger jaeger.Logger,
+) (jaeger.Reporter, error) {
+	sender, err := rc.newTransport()
+	if err != nil {
+		return nil, err
+	}
+	reporter := jaeger.NewRemoteReporter(
+		sender,
+		jaeger.ReporterOptions.QueueSize(rc.QueueSize),
+		jaeger.ReporterOptions.BufferFlushInterval(rc.BufferFlushInterval),
+		jaeger.ReporterOptions.Logger(logger),
+		jaeger.ReporterOptions.Metrics(metrics))
+	if rc.LogSpans && logger != nil {
+		logger.Infof("Initializing logging reporter\n")
+		reporter = jaeger.NewCompositeReporter(jaeger.NewLoggingReporter(logger), reporter)
+	}
+	return reporter, err
+}
+
+func (rc *ReporterConfig) newTransport() (jaeger.Transport, error) {
+	return jaeger.NewUDPTransport(rc.LocalAgentHostPort, 0)
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/config/config_env.go b/vendor/github.com/uber/jaeger-client-go/config/config_env.go
new file mode 100644
index 000000000..96f170c53
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/config/config_env.go
@@ -0,0 +1,205 @@
+// Copyright (c) 2018 The Jaeger Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package config
+
+import (
+	"fmt"
+	"os"
+	"strconv"
+	"strings"
+	"time"
+
+	opentracing "github.com/opentracing/opentracing-go"
+	"github.com/pkg/errors"
+
+	"github.com/uber/jaeger-client-go"
+)
+
+const (
+	// environment variable names
+	envServiceName            = "JAEGER_SERVICE_NAME"
+	envDisabled               = "JAEGER_DISABLED"
+	envRPCMetrics             = "JAEGER_RPC_METRICS"
+	envTags                   = "JAEGER_TAGS"
+	envSamplerType            = "JAEGER_SAMPLER_TYPE"
+	envSamplerParam           = "JAEGER_SAMPLER_PARAM"
+	envSamplerManagerHostPort = "JAEGER_SAMPLER_MANAGER_HOST_PORT"
+	envSamplerMaxOperations   = "JAEGER_SAMPLER_MAX_OPERATIONS"
+	envSamplerRefreshInterval = "JAEGER_SAMPLER_REFRESH_INTERVAL"
+	envReporterMaxQueueSize   = "JAEGER_REPORTER_MAX_QUEUE_SIZE"
+	envReporterFlushInterval  = "JAEGER_REPORTER_FLUSH_INTERVAL"
+	envReporterLogSpans       = "JAEGER_REPORTER_LOG_SPANS"
+	envAgentHost              = "JAEGER_AGENT_HOST"
+	envAgentPort              = "JAEGER_AGENT_PORT"
+)
+
+// FromEnv uses environment variables to set the tracer's Configuration
+func FromEnv() (*Configuration, error) {
+	c := &Configuration{}
+
+	if e := os.Getenv(envServiceName); e != "" {
+		c.ServiceName = e
+	}
+
+	if e := os.Getenv(envRPCMetrics); e != "" {
+		if value, err := strconv.ParseBool(e); err == nil {
+			c.RPCMetrics = value
+		} else {
+			return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envRPCMetrics, e)
+		}
+	}
+
+	if e := os.Getenv(envDisabled); e != "" {
+		if value, err := strconv.ParseBool(e); err == nil {
+			c.Disabled = value
+		} else {
+			return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envDisabled, e)
+		}
+	}
+
+	if e := os.Getenv(envTags); e != "" {
+		c.Tags = parseTags(e)
+	}
+
+	if s, err := samplerConfigFromEnv(); err == nil {
+		c.Sampler = s
+	} else {
+		return nil, errors.Wrap(err, "cannot obtain sampler config from env")
+	}
+
+	if r, err := reporterConfigFromEnv(); err == nil {
+		c.Reporter = r
+	} else {
+		return nil, errors.Wrap(err, "cannot obtain reporter config from env")
+	}
+
+	return c, nil
+}
+
+// samplerConfigFromEnv creates a new SamplerConfig based on the environment variables
+func samplerConfigFromEnv() (*SamplerConfig, error) {
+	sc := &SamplerConfig{}
+
+	if e := os.Getenv(envSamplerType); e != "" {
+		sc.Type = e
+	}
+
+	if e := os.Getenv(envSamplerParam); e != "" {
+		if value, err := strconv.ParseFloat(e, 64); err == nil {
+			sc.Param = value
+		} else {
+			return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envSamplerParam, e)
+		}
+	}
+
+	if e := os.Getenv(envSamplerManagerHostPort); e != "" {
+		sc.SamplingServerURL = e
+	}
+
+	if e := os.Getenv(envSamplerMaxOperations); e != "" {
+		if value, err := strconv.ParseInt(e, 10, 0); err == nil {
+			sc.MaxOperations = int(value)
+		} else {
+			return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envSamplerMaxOperations, e)
+		}
+	}
+
+	if e := os.Getenv(envSamplerRefreshInterval); e != "" {
+		if value, err := time.ParseDuration(e); err == nil {
+			sc.SamplingRefreshInterval = value
+		} else {
+			return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envSamplerRefreshInterval, e)
+		}
+	}
+
+	return sc, nil
+}
+
+// reporterConfigFromEnv creates a new ReporterConfig based on the environment variables
+func reporterConfigFromEnv() (*ReporterConfig, error) {
+	rc := &ReporterConfig{}
+
+	if e := os.Getenv(envReporterMaxQueueSize); e != "" {
+		if value, err := strconv.ParseInt(e, 10, 0); err == nil {
+			rc.QueueSize = int(value)
+		} else {
+			return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envReporterMaxQueueSize, e)
+		}
+	}
+
+	if e := os.Getenv(envReporterFlushInterval); e != "" {
+		if value, err := time.ParseDuration(e); err == nil {
+			rc.BufferFlushInterval = value
+		} else {
+			return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envReporterFlushInterval, e)
+		}
+	}
+
+	if e := os.Getenv(envReporterLogSpans); e != "" {
+		if value, err := strconv.ParseBool(e); err == nil {
+			rc.LogSpans = value
+		} else {
+			return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envReporterLogSpans, e)
+		}
+	}
+
+	host := jaeger.DefaultUDPSpanServerHost
+	if e := os.Getenv(envAgentHost); e != "" {
+		host = e
+	}
+
+	port := jaeger.DefaultUDPSpanServerPort
+	if e := os.Getenv(envAgentPort); e != "" {
+		if value, err := strconv.ParseInt(e, 10, 0); err == nil {
+			port = int(value)
+		} else {
+			return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envAgentPort, e)
+		}
+	}
+
+	// the side effect of this is that we are building the default value, even if none of the env vars
+	// were not explicitly passed
+	rc.LocalAgentHostPort = fmt.Sprintf("%s:%d", host, port)
+
+	return rc, nil
+}
+
+// parseTags parses the given string into a collection of Tags.
+// Spec for this value:
+// - comma separated list of key=value
+// - value can be specified using the notation ${envVar:defaultValue}, where `envVar`
+// is an environment variable and `defaultValue` is the value to use in case the env var is not set
+func parseTags(sTags string) []opentracing.Tag {
+	pairs := strings.Split(sTags, ",")
+	tags := make([]opentracing.Tag, 0)
+	for _, p := range pairs {
+		kv := strings.SplitN(p, "=", 2)
+		k, v := strings.TrimSpace(kv[0]), strings.TrimSpace(kv[1])
+
+		if strings.HasPrefix(v, "${") && strings.HasSuffix(v, "}") {
+			ed := strings.SplitN(v[2:len(v)-1], ":", 2)
+			e, d := ed[0], ed[1]
+			v = os.Getenv(e)
+			if v == "" && d != "" {
+				v = d
+			}
+		}
+
+		tag := opentracing.Tag{Key: k, Value: v}
+		tags = append(tags, tag)
+	}
+
+	return tags
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/config/options.go b/vendor/github.com/uber/jaeger-client-go/config/options.go
new file mode 100644
index 000000000..d14f1f8a9
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/config/options.go
@@ -0,0 +1,148 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package config
+
+import (
+	opentracing "github.com/opentracing/opentracing-go"
+	"github.com/uber/jaeger-lib/metrics"
+
+	"github.com/uber/jaeger-client-go"
+)
+
+// Option is a function that sets some option on the client.
+type Option func(c *Options)
+
+// Options control behavior of the client.
+type Options struct {
+	metrics             metrics.Factory
+	logger              jaeger.Logger
+	reporter            jaeger.Reporter
+	sampler             jaeger.Sampler
+	contribObservers    []jaeger.ContribObserver
+	observers           []jaeger.Observer
+	gen128Bit           bool
+	zipkinSharedRPCSpan bool
+	maxTagValueLength   int
+	tags                []opentracing.Tag
+	injectors           map[interface{}]jaeger.Injector
+	extractors          map[interface{}]jaeger.Extractor
+}
+
+// Metrics creates an Option that initializes Metrics in the tracer,
+// which is used to emit statistics about spans.
+func Metrics(factory metrics.Factory) Option {
+	return func(c *Options) {
+		c.metrics = factory
+	}
+}
+
+// Logger can be provided to log Reporter errors, as well as to log spans
+// if Reporter.LogSpans is set to true.
+func Logger(logger jaeger.Logger) Option {
+	return func(c *Options) {
+		c.logger = logger
+	}
+}
+
+// Reporter can be provided explicitly to override the configuration.
+// Useful for testing, e.g. by passing InMemoryReporter.
+func Reporter(reporter jaeger.Reporter) Option {
+	return func(c *Options) {
+		c.reporter = reporter
+	}
+}
+
+// Sampler can be provided explicitly to override the configuration.
+func Sampler(sampler jaeger.Sampler) Option {
+	return func(c *Options) {
+		c.sampler = sampler
+	}
+}
+
+// Observer can be registered with the Tracer to receive notifications about new Spans.
+func Observer(observer jaeger.Observer) Option {
+	return func(c *Options) {
+		c.observers = append(c.observers, observer)
+	}
+}
+
+// ContribObserver can be registered with the Tracer to recieve notifications
+// about new spans.
+func ContribObserver(observer jaeger.ContribObserver) Option {
+	return func(c *Options) {
+		c.contribObservers = append(c.contribObservers, observer)
+	}
+}
+
+// Gen128Bit specifies whether to generate 128bit trace IDs.
+func Gen128Bit(gen128Bit bool) Option {
+	return func(c *Options) {
+		c.gen128Bit = gen128Bit
+	}
+}
+
+// ZipkinSharedRPCSpan creates an option that enables sharing span ID between client
+// and server spans a la zipkin. If false, client and server spans will be assigned
+// different IDs.
+func ZipkinSharedRPCSpan(zipkinSharedRPCSpan bool) Option {
+	return func(c *Options) {
+		c.zipkinSharedRPCSpan = zipkinSharedRPCSpan
+	}
+}
+
+// MaxTagValueLength can be provided to override the default max tag value length.
+func MaxTagValueLength(maxTagValueLength int) Option {
+	return func(c *Options) {
+		c.maxTagValueLength = maxTagValueLength
+	}
+}
+
+// Tag creates an option that adds a tracer-level tag.
+func Tag(key string, value interface{}) Option {
+	return func(c *Options) {
+		c.tags = append(c.tags, opentracing.Tag{Key: key, Value: value})
+	}
+}
+
+// Injector registers an Injector with the given format.
+func Injector(format interface{}, injector jaeger.Injector) Option {
+	return func(c *Options) {
+		c.injectors[format] = injector
+	}
+}
+
+// Extractor registers an Extractor with the given format.
+func Extractor(format interface{}, extractor jaeger.Extractor) Option {
+	return func(c *Options) {
+		c.extractors[format] = extractor
+	}
+}
+
+func applyOptions(options ...Option) Options {
+	opts := Options{
+		injectors:  make(map[interface{}]jaeger.Injector),
+		extractors: make(map[interface{}]jaeger.Extractor),
+	}
+	for _, option := range options {
+		option(&opts)
+	}
+	if opts.metrics == nil {
+		opts.metrics = metrics.NullFactory
+	}
+	if opts.logger == nil {
+		opts.logger = jaeger.NullLogger
+	}
+	return opts
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/constants.go b/vendor/github.com/uber/jaeger-client-go/constants.go
new file mode 100644
index 000000000..b5368ff38
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/constants.go
@@ -0,0 +1,88 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+const (
+	// JaegerClientVersion is the version of the client library reported as Span tag.
+	JaegerClientVersion = "Go-2.15.0-dev"
+
+	// JaegerClientVersionTagKey is the name of the tag used to report client version.
+	JaegerClientVersionTagKey = "jaeger.version"
+
+	// JaegerDebugHeader is the name of HTTP header or a TextMap carrier key which,
+	// if found in the carrier, forces the trace to be sampled as "debug" trace.
+	// The value of the header is recorded as the tag on the root span, so that the
+	// trace can be found in the UI using this value as a correlation ID.
+	JaegerDebugHeader = "jaeger-debug-id"
+
+	// JaegerBaggageHeader is the name of the HTTP header that is used to submit baggage.
+	// It differs from TraceBaggageHeaderPrefix in that it can be used only in cases where
+	// a root span does not exist.
+	JaegerBaggageHeader = "jaeger-baggage"
+
+	// TracerHostnameTagKey used to report host name of the process.
+	TracerHostnameTagKey = "hostname"
+
+	// TracerIPTagKey used to report ip of the process.
+	TracerIPTagKey = "ip"
+
+	// TracerUUIDTagKey used to report UUID of the client process.
+	TracerUUIDTagKey = "client-uuid"
+
+	// SamplerTypeTagKey reports which sampler was used on the root span.
+	SamplerTypeTagKey = "sampler.type"
+
+	// SamplerParamTagKey reports the parameter of the sampler, like sampling probability.
+	SamplerParamTagKey = "sampler.param"
+
+	// TraceContextHeaderName is the http header name used to propagate tracing context.
+	// This must be in lower-case to avoid mismatches when decoding incoming headers.
+	TraceContextHeaderName = "uber-trace-id"
+
+	// TracerStateHeaderName is deprecated.
+	// Deprecated: use TraceContextHeaderName
+	TracerStateHeaderName = TraceContextHeaderName
+
+	// TraceBaggageHeaderPrefix is the prefix for http headers used to propagate baggage.
+	// This must be in lower-case to avoid mismatches when decoding incoming headers.
+	TraceBaggageHeaderPrefix = "uberctx-"
+
+	// SamplerTypeConst is the type of sampler that always makes the same decision.
+	SamplerTypeConst = "const"
+
+	// SamplerTypeRemote is the type of sampler that polls Jaeger agent for sampling strategy.
+	SamplerTypeRemote = "remote"
+
+	// SamplerTypeProbabilistic is the type of sampler that samples traces
+	// with a certain fixed probability.
+	SamplerTypeProbabilistic = "probabilistic"
+
+	// SamplerTypeRateLimiting is the type of sampler that samples
+	// only up to a fixed number of traces per second.
+	SamplerTypeRateLimiting = "ratelimiting"
+
+	// SamplerTypeLowerBound is the type of sampler that samples
+	// at least a fixed number of traces per second.
+	SamplerTypeLowerBound = "lowerbound"
+
+	// DefaultUDPSpanServerHost is the default host to send the spans to, via UDP
+	DefaultUDPSpanServerHost = "localhost"
+
+	// DefaultUDPSpanServerPort is the default port to send the spans to, via UDP
+	DefaultUDPSpanServerPort = 6831
+
+	// DefaultMaxTagValueLength is the default max length of byte array or string allowed in the tag value.
+	DefaultMaxTagValueLength = 256
+)
diff --git a/vendor/github.com/uber/jaeger-client-go/context.go b/vendor/github.com/uber/jaeger-client-go/context.go
new file mode 100644
index 000000000..8b06173d9
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/context.go
@@ -0,0 +1,258 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"errors"
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+const (
+	flagSampled = byte(1)
+	flagDebug   = byte(2)
+)
+
+var (
+	errEmptyTracerStateString     = errors.New("Cannot convert empty string to tracer state")
+	errMalformedTracerStateString = errors.New("String does not match tracer state format")
+
+	emptyContext = SpanContext{}
+)
+
+// TraceID represents unique 128bit identifier of a trace
+type TraceID struct {
+	High, Low uint64
+}
+
+// SpanID represents unique 64bit identifier of a span
+type SpanID uint64
+
+// SpanContext represents propagated span identity and state
+type SpanContext struct {
+	// traceID represents globally unique ID of the trace.
+	// Usually generated as a random number.
+	traceID TraceID
+
+	// spanID represents span ID that must be unique within its trace,
+	// but does not have to be globally unique.
+	spanID SpanID
+
+	// parentID refers to the ID of the parent span.
+	// Should be 0 if the current span is a root span.
+	parentID SpanID
+
+	// flags is a bitmap containing such bits as 'sampled' and 'debug'.
+	flags byte
+
+	// Distributed Context baggage. The is a snapshot in time.
+	baggage map[string]string
+
+	// debugID can be set to some correlation ID when the context is being
+	// extracted from a TextMap carrier.
+	//
+	// See JaegerDebugHeader in constants.go
+	debugID string
+}
+
+// ForeachBaggageItem implements ForeachBaggageItem() of opentracing.SpanContext
+func (c SpanContext) ForeachBaggageItem(handler func(k, v string) bool) {
+	for k, v := range c.baggage {
+		if !handler(k, v) {
+			break
+		}
+	}
+}
+
+// IsSampled returns whether this trace was chosen for permanent storage
+// by the sampling mechanism of the tracer.
+func (c SpanContext) IsSampled() bool {
+	return (c.flags & flagSampled) == flagSampled
+}
+
+// IsDebug indicates whether sampling was explicitly requested by the service.
+func (c SpanContext) IsDebug() bool {
+	return (c.flags & flagDebug) == flagDebug
+}
+
+// IsValid indicates whether this context actually represents a valid trace.
+func (c SpanContext) IsValid() bool {
+	return c.traceID.IsValid() && c.spanID != 0
+}
+
+func (c SpanContext) String() string {
+	if c.traceID.High == 0 {
+		return fmt.Sprintf("%x:%x:%x:%x", c.traceID.Low, uint64(c.spanID), uint64(c.parentID), c.flags)
+	}
+	return fmt.Sprintf("%x%016x:%x:%x:%x", c.traceID.High, c.traceID.Low, uint64(c.spanID), uint64(c.parentID), c.flags)
+}
+
+// ContextFromString reconstructs the Context encoded in a string
+func ContextFromString(value string) (SpanContext, error) {
+	var context SpanContext
+	if value == "" {
+		return emptyContext, errEmptyTracerStateString
+	}
+	parts := strings.Split(value, ":")
+	if len(parts) != 4 {
+		return emptyContext, errMalformedTracerStateString
+	}
+	var err error
+	if context.traceID, err = TraceIDFromString(parts[0]); err != nil {
+		return emptyContext, err
+	}
+	if context.spanID, err = SpanIDFromString(parts[1]); err != nil {
+		return emptyContext, err
+	}
+	if context.parentID, err = SpanIDFromString(parts[2]); err != nil {
+		return emptyContext, err
+	}
+	flags, err := strconv.ParseUint(parts[3], 10, 8)
+	if err != nil {
+		return emptyContext, err
+	}
+	context.flags = byte(flags)
+	return context, nil
+}
+
+// TraceID returns the trace ID of this span context
+func (c SpanContext) TraceID() TraceID {
+	return c.traceID
+}
+
+// SpanID returns the span ID of this span context
+func (c SpanContext) SpanID() SpanID {
+	return c.spanID
+}
+
+// ParentID returns the parent span ID of this span context
+func (c SpanContext) ParentID() SpanID {
+	return c.parentID
+}
+
+// NewSpanContext creates a new instance of SpanContext
+func NewSpanContext(traceID TraceID, spanID, parentID SpanID, sampled bool, baggage map[string]string) SpanContext {
+	flags := byte(0)
+	if sampled {
+		flags = flagSampled
+	}
+	return SpanContext{
+		traceID:  traceID,
+		spanID:   spanID,
+		parentID: parentID,
+		flags:    flags,
+		baggage:  baggage}
+}
+
+// CopyFrom copies data from ctx into this context, including span identity and baggage.
+// TODO This is only used by interop.go. Remove once TChannel Go supports OpenTracing.
+func (c *SpanContext) CopyFrom(ctx *SpanContext) {
+	c.traceID = ctx.traceID
+	c.spanID = ctx.spanID
+	c.parentID = ctx.parentID
+	c.flags = ctx.flags
+	if l := len(ctx.baggage); l > 0 {
+		c.baggage = make(map[string]string, l)
+		for k, v := range ctx.baggage {
+			c.baggage[k] = v
+		}
+	} else {
+		c.baggage = nil
+	}
+}
+
+// WithBaggageItem creates a new context with an extra baggage item.
+func (c SpanContext) WithBaggageItem(key, value string) SpanContext {
+	var newBaggage map[string]string
+	if c.baggage == nil {
+		newBaggage = map[string]string{key: value}
+	} else {
+		newBaggage = make(map[string]string, len(c.baggage)+1)
+		for k, v := range c.baggage {
+			newBaggage[k] = v
+		}
+		newBaggage[key] = value
+	}
+	// Use positional parameters so the compiler will help catch new fields.
+	return SpanContext{c.traceID, c.spanID, c.parentID, c.flags, newBaggage, ""}
+}
+
+// isDebugIDContainerOnly returns true when the instance of the context is only
+// used to return the debug/correlation ID from extract() method. This happens
+// in the situation when "jaeger-debug-id" header is passed in the carrier to
+// the extract() method, but the request otherwise has no span context in it.
+// Previously this would've returned opentracing.ErrSpanContextNotFound from the
+// extract method, but now it returns a dummy context with only debugID filled in.
+//
+// See JaegerDebugHeader in constants.go
+// See textMapPropagator#Extract
+func (c *SpanContext) isDebugIDContainerOnly() bool {
+	return !c.traceID.IsValid() && c.debugID != ""
+}
+
+// ------- TraceID -------
+
+func (t TraceID) String() string {
+	if t.High == 0 {
+		return fmt.Sprintf("%x", t.Low)
+	}
+	return fmt.Sprintf("%x%016x", t.High, t.Low)
+}
+
+// TraceIDFromString creates a TraceID from a hexadecimal string
+func TraceIDFromString(s string) (TraceID, error) {
+	var hi, lo uint64
+	var err error
+	if len(s) > 32 {
+		return TraceID{}, fmt.Errorf("TraceID cannot be longer than 32 hex characters: %s", s)
+	} else if len(s) > 16 {
+		hiLen := len(s) - 16
+		if hi, err = strconv.ParseUint(s[0:hiLen], 16, 64); err != nil {
+			return TraceID{}, err
+		}
+		if lo, err = strconv.ParseUint(s[hiLen:], 16, 64); err != nil {
+			return TraceID{}, err
+		}
+	} else {
+		if lo, err = strconv.ParseUint(s, 16, 64); err != nil {
+			return TraceID{}, err
+		}
+	}
+	return TraceID{High: hi, Low: lo}, nil
+}
+
+// IsValid checks if the trace ID is valid, i.e. not zero.
+func (t TraceID) IsValid() bool {
+	return t.High != 0 || t.Low != 0
+}
+
+// ------- SpanID -------
+
+func (s SpanID) String() string {
+	return fmt.Sprintf("%x", uint64(s))
+}
+
+// SpanIDFromString creates a SpanID from a hexadecimal string
+func SpanIDFromString(s string) (SpanID, error) {
+	if len(s) > 16 {
+		return SpanID(0), fmt.Errorf("SpanID cannot be longer than 16 hex characters: %s", s)
+	}
+	id, err := strconv.ParseUint(s, 16, 64)
+	if err != nil {
+		return SpanID(0), err
+	}
+	return SpanID(id), nil
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/contrib_observer.go b/vendor/github.com/uber/jaeger-client-go/contrib_observer.go
new file mode 100644
index 000000000..4ce1881f3
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/contrib_observer.go
@@ -0,0 +1,56 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	opentracing "github.com/opentracing/opentracing-go"
+)
+
+// ContribObserver can be registered with the Tracer to receive notifications
+// about new Spans. Modelled after github.com/opentracing-contrib/go-observer.
+type ContribObserver interface {
+	// Create and return a span observer. Called when a span starts.
+	// If the Observer is not interested in the given span, it must return (nil, false).
+	// E.g :
+	//     func StartSpan(opName string, opts ...opentracing.StartSpanOption) {
+	//         var sp opentracing.Span
+	//         sso := opentracing.StartSpanOptions{}
+	//         if spanObserver, ok := Observer.OnStartSpan(span, opName, sso); ok {
+	//             // we have a valid SpanObserver
+	//         }
+	//         ...
+	//     }
+	OnStartSpan(sp opentracing.Span, operationName string, options opentracing.StartSpanOptions) (ContribSpanObserver, bool)
+}
+
+// ContribSpanObserver is created by the Observer and receives notifications
+// about other Span events. This interface is meant to match
+// github.com/opentracing-contrib/go-observer, via duck typing, without
+// directly importing the go-observer package.
+type ContribSpanObserver interface {
+	OnSetOperationName(operationName string)
+	OnSetTag(key string, value interface{})
+	OnFinish(options opentracing.FinishOptions)
+}
+
+// wrapper observer for the old observers (see observer.go)
+type oldObserver struct {
+	obs Observer
+}
+
+func (o *oldObserver) OnStartSpan(sp opentracing.Span, operationName string, options opentracing.StartSpanOptions) (ContribSpanObserver, bool) {
+	spanObserver := o.obs.OnStartSpan(operationName, options)
+	return spanObserver, spanObserver != nil
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/doc.go b/vendor/github.com/uber/jaeger-client-go/doc.go
new file mode 100644
index 000000000..4f5549033
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/doc.go
@@ -0,0 +1,24 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/*
+Package jaeger implements an OpenTracing (http://opentracing.io) Tracer.
+It is currently using Zipkin-compatible data model and can be directly
+itegrated with Zipkin backend (http://zipkin.io).
+
+For integration instructions please refer to the README:
+
+https://github.com/uber/jaeger-client-go/blob/master/README.md
+*/
+package jaeger
diff --git a/vendor/github.com/uber/jaeger-client-go/glide.lock b/vendor/github.com/uber/jaeger-client-go/glide.lock
new file mode 100644
index 000000000..d76b15361
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/glide.lock
@@ -0,0 +1,89 @@
+hash: 3accf84f97bff4a91162736104c0e9b9790820712bd86db6fec5e665f7196a82
+updated: 2018-04-30T11:46:43.804556-04:00
+imports:
+- name: github.com/beorn7/perks
+  version: 3a771d992973f24aa725d07868b467d1ddfceafb
+  subpackages:
+  - quantile
+- name: github.com/codahale/hdrhistogram
+  version: 3a0bb77429bd3a61596f5e8a3172445844342120
+- name: github.com/crossdock/crossdock-go
+  version: 049aabb0122b03bc9bd30cab8f3f91fb60166361
+  subpackages:
+  - assert
+  - require
+- name: github.com/davecgh/go-spew
+  version: 8991bc29aa16c548c550c7ff78260e27b9ab7c73
+  subpackages:
+  - spew
+- name: github.com/golang/protobuf
+  version: bbd03ef6da3a115852eaf24c8a1c46aeb39aa175
+  subpackages:
+  - proto
+- name: github.com/matttproud/golang_protobuf_extensions
+  version: c12348ce28de40eed0136aa2b644d0ee0650e56c
+  subpackages:
+  - pbutil
+- name: github.com/opentracing/opentracing-go
+  version: 1949ddbfd147afd4d964a9f00b24eb291e0e7c38
+  subpackages:
+  - ext
+  - log
+- name: github.com/pkg/errors
+  version: 645ef00459ed84a119197bfb8d8205042c6df63d
+- name: github.com/pmezard/go-difflib
+  version: 792786c7400a136282c1664665ae0a8db921c6c2
+  subpackages:
+  - difflib
+- name: github.com/prometheus/client_golang
+  version: c5b7fccd204277076155f10851dad72b76a49317
+  subpackages:
+  - prometheus
+- name: github.com/prometheus/client_model
+  version: 99fa1f4be8e564e8a6b613da7fa6f46c9edafc6c
+  subpackages:
+  - go
+- name: github.com/prometheus/common
+  version: 38c53a9f4bfcd932d1b00bfc65e256a7fba6b37a
+  subpackages:
+  - expfmt
+  - internal/bitbucket.org/ww/goautoneg
+  - model
+- name: github.com/prometheus/procfs
+  version: 780932d4fbbe0e69b84c34c20f5c8d0981e109ea
+  subpackages:
+  - internal/util
+  - nfs
+  - xfs
+- name: github.com/stretchr/testify
+  version: 12b6f73e6084dad08a7c6e575284b177ecafbc71
+  subpackages:
+  - assert
+  - require
+  - suite
+- name: github.com/uber/jaeger-lib
+  version: 4267858c0679cd4e47cefed8d7f70fd386cfb567
+  subpackages:
+  - metrics
+  - metrics/prometheus
+  - metrics/testutils
+- name: go.uber.org/atomic
+  version: 8474b86a5a6f79c443ce4b2992817ff32cf208b8
+- name: go.uber.org/multierr
+  version: 3c4937480c32f4c13a875a1829af76c98ca3d40a
+- name: go.uber.org/zap
+  version: eeedf312bc6c57391d84767a4cd413f02a917974
+  subpackages:
+  - buffer
+  - internal/bufferpool
+  - internal/color
+  - internal/exit
+  - zapcore
+- name: golang.org/x/net
+  version: 6078986fec03a1dcc236c34816c71b0e05018fda
+  subpackages:
+  - context
+  - context/ctxhttp
+testImports:
+- name: github.com/uber-go/atomic
+  version: 8474b86a5a6f79c443ce4b2992817ff32cf208b8
diff --git a/vendor/github.com/uber/jaeger-client-go/glide.yaml b/vendor/github.com/uber/jaeger-client-go/glide.yaml
new file mode 100644
index 000000000..6637da215
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/glide.yaml
@@ -0,0 +1,22 @@
+package: github.com/uber/jaeger-client-go
+import:
+- package: github.com/opentracing/opentracing-go
+  version: ^1
+  subpackages:
+  - ext
+  - log
+- package: github.com/crossdock/crossdock-go
+- package: github.com/uber/jaeger-lib
+  version: ^1.2.1
+  subpackages:
+  - metrics
+- package: github.com/pkg/errors
+  version: ~0.8.0
+testImport:
+- package: github.com/stretchr/testify
+  subpackages:
+  - assert
+  - require
+  - suite
+- package: github.com/prometheus/client_golang
+  version: v0.8.0
diff --git a/vendor/github.com/uber/jaeger-client-go/header.go b/vendor/github.com/uber/jaeger-client-go/header.go
new file mode 100644
index 000000000..19c2c055b
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/header.go
@@ -0,0 +1,64 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+// HeadersConfig contains the values for the header keys that Jaeger will use.
+// These values may be either custom or default depending on whether custom
+// values were provided via a configuration.
+type HeadersConfig struct {
+	// JaegerDebugHeader is the name of HTTP header or a TextMap carrier key which,
+	// if found in the carrier, forces the trace to be sampled as "debug" trace.
+	// The value of the header is recorded as the tag on the root span, so that the
+	// trace can be found in the UI using this value as a correlation ID.
+	JaegerDebugHeader string `yaml:"jaegerDebugHeader"`
+
+	// JaegerBaggageHeader is the name of the HTTP header that is used to submit baggage.
+	// It differs from TraceBaggageHeaderPrefix in that it can be used only in cases where
+	// a root span does not exist.
+	JaegerBaggageHeader string `yaml:"jaegerBaggageHeader"`
+
+	// TraceContextHeaderName is the http header name used to propagate tracing context.
+	// This must be in lower-case to avoid mismatches when decoding incoming headers.
+	TraceContextHeaderName string `yaml:"TraceContextHeaderName"`
+
+	// TraceBaggageHeaderPrefix is the prefix for http headers used to propagate baggage.
+	// This must be in lower-case to avoid mismatches when decoding incoming headers.
+	TraceBaggageHeaderPrefix string `yaml:"traceBaggageHeaderPrefix"`
+}
+
+func (c *HeadersConfig) applyDefaults() *HeadersConfig {
+	if c.JaegerBaggageHeader == "" {
+		c.JaegerBaggageHeader = JaegerBaggageHeader
+	}
+	if c.JaegerDebugHeader == "" {
+		c.JaegerDebugHeader = JaegerDebugHeader
+	}
+	if c.TraceBaggageHeaderPrefix == "" {
+		c.TraceBaggageHeaderPrefix = TraceBaggageHeaderPrefix
+	}
+	if c.TraceContextHeaderName == "" {
+		c.TraceContextHeaderName = TraceContextHeaderName
+	}
+	return c
+}
+
+func getDefaultHeadersConfig() *HeadersConfig {
+	return &HeadersConfig{
+		JaegerDebugHeader:        JaegerDebugHeader,
+		JaegerBaggageHeader:      JaegerBaggageHeader,
+		TraceContextHeaderName:   TraceContextHeaderName,
+		TraceBaggageHeaderPrefix: TraceBaggageHeaderPrefix,
+	}
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/internal/baggage/remote/options.go b/vendor/github.com/uber/jaeger-client-go/internal/baggage/remote/options.go
new file mode 100644
index 000000000..745729319
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/internal/baggage/remote/options.go
@@ -0,0 +1,101 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package remote
+
+import (
+	"time"
+
+	"github.com/uber/jaeger-client-go"
+)
+
+const (
+	defaultMaxValueLength  = 2048
+	defaultRefreshInterval = time.Minute
+	defaultHostPort        = "localhost:5778"
+)
+
+// Option is a function that sets some option on the RestrictionManager
+type Option func(options *options)
+
+// Options is a factory for all available options
+var Options options
+
+type options struct {
+	denyBaggageOnInitializationFailure bool
+	metrics                            *jaeger.Metrics
+	logger                             jaeger.Logger
+	hostPort                           string
+	refreshInterval                    time.Duration
+}
+
+// DenyBaggageOnInitializationFailure creates an Option that determines the startup failure mode of RestrictionManager.
+// If DenyBaggageOnInitializationFailure is true, RestrictionManager will not allow any baggage to be written until baggage
+// restrictions have been retrieved from agent.
+// If DenyBaggageOnInitializationFailure is false, RestrictionManager will allow any baggage to be written until baggage
+// restrictions have been retrieved from agent.
+func (options) DenyBaggageOnInitializationFailure(b bool) Option {
+	return func(o *options) {
+		o.denyBaggageOnInitializationFailure = b
+	}
+}
+
+// Metrics creates an Option that initializes Metrics on the RestrictionManager, which is used to emit statistics.
+func (options) Metrics(m *jaeger.Metrics) Option {
+	return func(o *options) {
+		o.metrics = m
+	}
+}
+
+// Logger creates an Option that sets the logger used by the RestrictionManager.
+func (options) Logger(logger jaeger.Logger) Option {
+	return func(o *options) {
+		o.logger = logger
+	}
+}
+
+// HostPort creates an Option that sets the hostPort of the local agent that contains the baggage restrictions.
+func (options) HostPort(hostPort string) Option {
+	return func(o *options) {
+		o.hostPort = hostPort
+	}
+}
+
+// RefreshInterval creates an Option that sets how often the RestrictionManager will poll local agent for
+// the baggage restrictions.
+func (options) RefreshInterval(refreshInterval time.Duration) Option {
+	return func(o *options) {
+		o.refreshInterval = refreshInterval
+	}
+}
+
+func applyOptions(o ...Option) options {
+	opts := options{}
+	for _, option := range o {
+		option(&opts)
+	}
+	if opts.metrics == nil {
+		opts.metrics = jaeger.NewNullMetrics()
+	}
+	if opts.logger == nil {
+		opts.logger = jaeger.NullLogger
+	}
+	if opts.hostPort == "" {
+		opts.hostPort = defaultHostPort
+	}
+	if opts.refreshInterval == 0 {
+		opts.refreshInterval = defaultRefreshInterval
+	}
+	return opts
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/internal/baggage/remote/restriction_manager.go b/vendor/github.com/uber/jaeger-client-go/internal/baggage/remote/restriction_manager.go
new file mode 100644
index 000000000..a56515aca
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/internal/baggage/remote/restriction_manager.go
@@ -0,0 +1,157 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package remote
+
+import (
+	"fmt"
+	"net/url"
+	"sync"
+	"time"
+
+	"github.com/uber/jaeger-client-go/internal/baggage"
+	thrift "github.com/uber/jaeger-client-go/thrift-gen/baggage"
+	"github.com/uber/jaeger-client-go/utils"
+)
+
+type httpBaggageRestrictionManagerProxy struct {
+	url string
+}
+
+func newHTTPBaggageRestrictionManagerProxy(hostPort, serviceName string) *httpBaggageRestrictionManagerProxy {
+	v := url.Values{}
+	v.Set("service", serviceName)
+	return &httpBaggageRestrictionManagerProxy{
+		url: fmt.Sprintf("http://%s/baggageRestrictions?%s", hostPort, v.Encode()),
+	}
+}
+
+func (s *httpBaggageRestrictionManagerProxy) GetBaggageRestrictions(serviceName string) ([]*thrift.BaggageRestriction, error) {
+	var out []*thrift.BaggageRestriction
+	if err := utils.GetJSON(s.url, &out); err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// RestrictionManager manages baggage restrictions by retrieving baggage restrictions from agent
+type RestrictionManager struct {
+	options
+
+	mux                sync.RWMutex
+	serviceName        string
+	restrictions       map[string]*baggage.Restriction
+	thriftProxy        thrift.BaggageRestrictionManager
+	pollStopped        sync.WaitGroup
+	stopPoll           chan struct{}
+	invalidRestriction *baggage.Restriction
+	validRestriction   *baggage.Restriction
+
+	// Determines if the manager has successfully retrieved baggage restrictions from agent
+	initialized bool
+}
+
+// NewRestrictionManager returns a BaggageRestrictionManager that polls the agent for the latest
+// baggage restrictions.
+func NewRestrictionManager(serviceName string, options ...Option) *RestrictionManager {
+	// TODO there is a developing use case where a single tracer can generate traces on behalf of many services.
+	// restrictionsMap will need to exist per service
+	opts := applyOptions(options...)
+	m := &RestrictionManager{
+		serviceName:        serviceName,
+		options:            opts,
+		restrictions:       make(map[string]*baggage.Restriction),
+		thriftProxy:        newHTTPBaggageRestrictionManagerProxy(opts.hostPort, serviceName),
+		stopPoll:           make(chan struct{}),
+		invalidRestriction: baggage.NewRestriction(false, 0),
+		validRestriction:   baggage.NewRestriction(true, defaultMaxValueLength),
+	}
+	m.pollStopped.Add(1)
+	go m.pollManager()
+	return m
+}
+
+// isReady returns true if the manager has retrieved baggage restrictions from the remote source.
+func (m *RestrictionManager) isReady() bool {
+	m.mux.RLock()
+	defer m.mux.RUnlock()
+	return m.initialized
+}
+
+// GetRestriction implements RestrictionManager#GetRestriction.
+func (m *RestrictionManager) GetRestriction(service, key string) *baggage.Restriction {
+	m.mux.RLock()
+	defer m.mux.RUnlock()
+	if !m.initialized {
+		if m.denyBaggageOnInitializationFailure {
+			return m.invalidRestriction
+		}
+		return m.validRestriction
+	}
+	if restriction, ok := m.restrictions[key]; ok {
+		return restriction
+	}
+	return m.invalidRestriction
+}
+
+// Close stops remote polling and closes the RemoteRestrictionManager.
+func (m *RestrictionManager) Close() error {
+	close(m.stopPoll)
+	m.pollStopped.Wait()
+	return nil
+}
+
+func (m *RestrictionManager) pollManager() {
+	defer m.pollStopped.Done()
+	// attempt to initialize baggage restrictions
+	if err := m.updateRestrictions(); err != nil {
+		m.logger.Error(fmt.Sprintf("Failed to initialize baggage restrictions: %s", err.Error()))
+	}
+	ticker := time.NewTicker(m.refreshInterval)
+	defer ticker.Stop()
+
+	for {
+		select {
+		case <-ticker.C:
+			if err := m.updateRestrictions(); err != nil {
+				m.logger.Error(fmt.Sprintf("Failed to update baggage restrictions: %s", err.Error()))
+			}
+		case <-m.stopPoll:
+			return
+		}
+	}
+}
+
+func (m *RestrictionManager) updateRestrictions() error {
+	restrictions, err := m.thriftProxy.GetBaggageRestrictions(m.serviceName)
+	if err != nil {
+		m.metrics.BaggageRestrictionsUpdateFailure.Inc(1)
+		return err
+	}
+	newRestrictions := m.parseRestrictions(restrictions)
+	m.metrics.BaggageRestrictionsUpdateSuccess.Inc(1)
+	m.mux.Lock()
+	defer m.mux.Unlock()
+	m.initialized = true
+	m.restrictions = newRestrictions
+	return nil
+}
+
+func (m *RestrictionManager) parseRestrictions(restrictions []*thrift.BaggageRestriction) map[string]*baggage.Restriction {
+	setters := make(map[string]*baggage.Restriction, len(restrictions))
+	for _, restriction := range restrictions {
+		setters[restriction.BaggageKey] = baggage.NewRestriction(true, int(restriction.MaxValueLength))
+	}
+	return setters
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/internal/baggage/restriction_manager.go b/vendor/github.com/uber/jaeger-client-go/internal/baggage/restriction_manager.go
new file mode 100644
index 000000000..c16a5c566
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/internal/baggage/restriction_manager.go
@@ -0,0 +1,71 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package baggage
+
+const (
+	defaultMaxValueLength = 2048
+)
+
+// Restriction determines whether a baggage key is allowed and contains any restrictions on the baggage value.
+type Restriction struct {
+	keyAllowed     bool
+	maxValueLength int
+}
+
+// NewRestriction returns a new Restriction.
+func NewRestriction(keyAllowed bool, maxValueLength int) *Restriction {
+	return &Restriction{
+		keyAllowed:     keyAllowed,
+		maxValueLength: maxValueLength,
+	}
+}
+
+// KeyAllowed returns whether the baggage key for this restriction is allowed.
+func (r *Restriction) KeyAllowed() bool {
+	return r.keyAllowed
+}
+
+// MaxValueLength returns the max length for the baggage value.
+func (r *Restriction) MaxValueLength() int {
+	return r.maxValueLength
+}
+
+// RestrictionManager keeps track of valid baggage keys and their restrictions. The manager
+// will return a Restriction for a specific baggage key which will determine whether the baggage
+// key is allowed for the current service and any other applicable restrictions on the baggage
+// value.
+type RestrictionManager interface {
+	GetRestriction(service, key string) *Restriction
+}
+
+// DefaultRestrictionManager allows any baggage key.
+type DefaultRestrictionManager struct {
+	defaultRestriction *Restriction
+}
+
+// NewDefaultRestrictionManager returns a DefaultRestrictionManager.
+func NewDefaultRestrictionManager(maxValueLength int) *DefaultRestrictionManager {
+	if maxValueLength == 0 {
+		maxValueLength = defaultMaxValueLength
+	}
+	return &DefaultRestrictionManager{
+		defaultRestriction: &Restriction{keyAllowed: true, maxValueLength: maxValueLength},
+	}
+}
+
+// GetRestriction implements RestrictionManager#GetRestriction.
+func (m *DefaultRestrictionManager) GetRestriction(service, key string) *Restriction {
+	return m.defaultRestriction
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/internal/spanlog/json.go b/vendor/github.com/uber/jaeger-client-go/internal/spanlog/json.go
new file mode 100644
index 000000000..0e10b8a5a
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/internal/spanlog/json.go
@@ -0,0 +1,81 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package spanlog
+
+import (
+	"encoding/json"
+	"fmt"
+
+	"github.com/opentracing/opentracing-go/log"
+)
+
+type fieldsAsMap map[string]string
+
+// MaterializeWithJSON converts log Fields into JSON string
+// TODO refactor into pluggable materializer
+func MaterializeWithJSON(logFields []log.Field) ([]byte, error) {
+	fields := fieldsAsMap(make(map[string]string, len(logFields)))
+	for _, field := range logFields {
+		field.Marshal(fields)
+	}
+	if event, ok := fields["event"]; ok && len(fields) == 1 {
+		return []byte(event), nil
+	}
+	return json.Marshal(fields)
+}
+
+func (ml fieldsAsMap) EmitString(key, value string) {
+	ml[key] = value
+}
+
+func (ml fieldsAsMap) EmitBool(key string, value bool) {
+	ml[key] = fmt.Sprintf("%t", value)
+}
+
+func (ml fieldsAsMap) EmitInt(key string, value int) {
+	ml[key] = fmt.Sprintf("%d", value)
+}
+
+func (ml fieldsAsMap) EmitInt32(key string, value int32) {
+	ml[key] = fmt.Sprintf("%d", value)
+}
+
+func (ml fieldsAsMap) EmitInt64(key string, value int64) {
+	ml[key] = fmt.Sprintf("%d", value)
+}
+
+func (ml fieldsAsMap) EmitUint32(key string, value uint32) {
+	ml[key] = fmt.Sprintf("%d", value)
+}
+
+func (ml fieldsAsMap) EmitUint64(key string, value uint64) {
+	ml[key] = fmt.Sprintf("%d", value)
+}
+
+func (ml fieldsAsMap) EmitFloat32(key string, value float32) {
+	ml[key] = fmt.Sprintf("%f", value)
+}
+
+func (ml fieldsAsMap) EmitFloat64(key string, value float64) {
+	ml[key] = fmt.Sprintf("%f", value)
+}
+
+func (ml fieldsAsMap) EmitObject(key string, value interface{}) {
+	ml[key] = fmt.Sprintf("%+v", value)
+}
+
+func (ml fieldsAsMap) EmitLazyLogger(value log.LazyLogger) {
+	value(ml)
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/internal/throttler/remote/options.go b/vendor/github.com/uber/jaeger-client-go/internal/throttler/remote/options.go
new file mode 100644
index 000000000..f52c322fb
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/internal/throttler/remote/options.go
@@ -0,0 +1,99 @@
+// Copyright (c) 2018 The Jaeger Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package remote
+
+import (
+	"time"
+
+	"github.com/uber/jaeger-client-go"
+)
+
+const (
+	defaultHostPort        = "localhost:5778"
+	defaultRefreshInterval = time.Second * 5
+)
+
+// Option is a function that sets some option on the Throttler
+type Option func(options *options)
+
+// Options is a factory for all available options
+var Options options
+
+type options struct {
+	metrics                   *jaeger.Metrics
+	logger                    jaeger.Logger
+	hostPort                  string
+	refreshInterval           time.Duration
+	synchronousInitialization bool
+}
+
+// Metrics creates an Option that initializes Metrics on the Throttler, which is used to emit statistics.
+func (options) Metrics(m *jaeger.Metrics) Option {
+	return func(o *options) {
+		o.metrics = m
+	}
+}
+
+// Logger creates an Option that sets the logger used by the Throttler.
+func (options) Logger(logger jaeger.Logger) Option {
+	return func(o *options) {
+		o.logger = logger
+	}
+}
+
+// HostPort creates an Option that sets the hostPort of the local agent that keeps track of credits.
+func (options) HostPort(hostPort string) Option {
+	return func(o *options) {
+		o.hostPort = hostPort
+	}
+}
+
+// RefreshInterval creates an Option that sets how often the Throttler will poll local agent for
+// credits.
+func (options) RefreshInterval(refreshInterval time.Duration) Option {
+	return func(o *options) {
+		o.refreshInterval = refreshInterval
+	}
+}
+
+// SynchronousInitialization creates an Option that determines whether the throttler should synchronously
+// fetch credits from the agent when an operation is seen for the first time. This should be set to true
+// if the client will be used by a short lived service that needs to ensure that credits are fetched upfront
+// such that sampling or throttling occurs.
+func (options) SynchronousInitialization(b bool) Option {
+	return func(o *options) {
+		o.synchronousInitialization = b
+	}
+}
+
+func applyOptions(o ...Option) options {
+	opts := options{}
+	for _, option := range o {
+		option(&opts)
+	}
+	if opts.metrics == nil {
+		opts.metrics = jaeger.NewNullMetrics()
+	}
+	if opts.logger == nil {
+		opts.logger = jaeger.NullLogger
+	}
+	if opts.hostPort == "" {
+		opts.hostPort = defaultHostPort
+	}
+	if opts.refreshInterval == 0 {
+		opts.refreshInterval = defaultRefreshInterval
+	}
+	return opts
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/internal/throttler/remote/throttler.go b/vendor/github.com/uber/jaeger-client-go/internal/throttler/remote/throttler.go
new file mode 100644
index 000000000..20f434fe4
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/internal/throttler/remote/throttler.go
@@ -0,0 +1,216 @@
+// Copyright (c) 2018 The Jaeger Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package remote
+
+import (
+	"fmt"
+	"net/url"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	"github.com/pkg/errors"
+
+	"github.com/uber/jaeger-client-go"
+	"github.com/uber/jaeger-client-go/utils"
+)
+
+const (
+	// minimumCredits is the minimum amount of credits necessary to not be throttled.
+	// i.e. if currentCredits > minimumCredits, then the operation will not be throttled.
+	minimumCredits = 1.0
+)
+
+var (
+	errorUUIDNotSet = errors.New("Throttler UUID must be set")
+)
+
+type operationBalance struct {
+	Operation string  `json:"operation"`
+	Balance   float64 `json:"balance"`
+}
+
+type creditResponse struct {
+	Balances []operationBalance `json:"balances"`
+}
+
+type httpCreditManagerProxy struct {
+	hostPort string
+}
+
+func newHTTPCreditManagerProxy(hostPort string) *httpCreditManagerProxy {
+	return &httpCreditManagerProxy{
+		hostPort: hostPort,
+	}
+}
+
+// N.B. Operations list must not be empty.
+func (m *httpCreditManagerProxy) FetchCredits(uuid, serviceName string, operations []string) (*creditResponse, error) {
+	params := url.Values{}
+	params.Set("service", serviceName)
+	params.Set("uuid", uuid)
+	for _, op := range operations {
+		params.Add("operations", op)
+	}
+	var resp creditResponse
+	if err := utils.GetJSON(fmt.Sprintf("http://%s/credits?%s", m.hostPort, params.Encode()), &resp); err != nil {
+		return nil, errors.Wrap(err, "Failed to receive credits from agent")
+	}
+	return &resp, nil
+}
+
+// Throttler retrieves credits from agent and uses it to throttle operations.
+type Throttler struct {
+	options
+
+	mux           sync.RWMutex
+	service       string
+	uuid          atomic.Value
+	creditManager *httpCreditManagerProxy
+	credits       map[string]float64 // map of operation->credits
+	close         chan struct{}
+	stopped       sync.WaitGroup
+}
+
+// NewThrottler returns a Throttler that polls agent for credits and uses them to throttle
+// the service.
+func NewThrottler(service string, options ...Option) *Throttler {
+	opts := applyOptions(options...)
+	creditManager := newHTTPCreditManagerProxy(opts.hostPort)
+	t := &Throttler{
+		options:       opts,
+		creditManager: creditManager,
+		service:       service,
+		credits:       make(map[string]float64),
+		close:         make(chan struct{}),
+	}
+	t.stopped.Add(1)
+	go t.pollManager()
+	return t
+}
+
+// IsAllowed implements Throttler#IsAllowed.
+func (t *Throttler) IsAllowed(operation string) bool {
+	t.mux.Lock()
+	defer t.mux.Unlock()
+	value, ok := t.credits[operation]
+	if !ok || value == 0 {
+		if !ok {
+			// NOTE: This appears to be a no-op at first glance, but it stores
+			// the operation key in the map. Necessary for functionality of
+			// Throttler#operations method.
+			t.credits[operation] = 0
+		}
+		if !t.synchronousInitialization {
+			t.metrics.ThrottledDebugSpans.Inc(1)
+			return false
+		}
+		// If it is the first time this operation is being checked, synchronously fetch
+		// the credits.
+		credits, err := t.fetchCredits([]string{operation})
+		if err != nil {
+			// Failed to receive credits from agent, try again next time
+			t.logger.Error("Failed to fetch credits: " + err.Error())
+			return false
+		}
+		if len(credits.Balances) == 0 {
+			// This shouldn't happen but just in case
+			return false
+		}
+		for _, opBalance := range credits.Balances {
+			t.credits[opBalance.Operation] += opBalance.Balance
+		}
+	}
+	return t.isAllowed(operation)
+}
+
+// Close stops the throttler from fetching credits from remote.
+func (t *Throttler) Close() error {
+	close(t.close)
+	t.stopped.Wait()
+	return nil
+}
+
+// SetProcess implements ProcessSetter#SetProcess. It's imperative that the UUID is set before any remote
+// requests are made.
+func (t *Throttler) SetProcess(process jaeger.Process) {
+	if process.UUID != "" {
+		t.uuid.Store(process.UUID)
+	}
+}
+
+// N.B. This function must be called with the Write Lock
+func (t *Throttler) isAllowed(operation string) bool {
+	credits := t.credits[operation]
+	if credits < minimumCredits {
+		t.metrics.ThrottledDebugSpans.Inc(1)
+		return false
+	}
+	t.credits[operation] = credits - minimumCredits
+	return true
+}
+
+func (t *Throttler) pollManager() {
+	defer t.stopped.Done()
+	ticker := time.NewTicker(t.refreshInterval)
+	defer ticker.Stop()
+	for {
+		select {
+		case <-ticker.C:
+			t.refreshCredits()
+		case <-t.close:
+			return
+		}
+	}
+}
+
+func (t *Throttler) operations() []string {
+	t.mux.RLock()
+	defer t.mux.RUnlock()
+	operations := make([]string, 0, len(t.credits))
+	for op := range t.credits {
+		operations = append(operations, op)
+	}
+	return operations
+}
+
+func (t *Throttler) refreshCredits() {
+	operations := t.operations()
+	if len(operations) == 0 {
+		return
+	}
+	newCredits, err := t.fetchCredits(operations)
+	if err != nil {
+		t.metrics.ThrottlerUpdateFailure.Inc(1)
+		t.logger.Error("Failed to fetch credits: " + err.Error())
+		return
+	}
+	t.metrics.ThrottlerUpdateSuccess.Inc(1)
+
+	t.mux.Lock()
+	defer t.mux.Unlock()
+	for _, opBalance := range newCredits.Balances {
+		t.credits[opBalance.Operation] += opBalance.Balance
+	}
+}
+
+func (t *Throttler) fetchCredits(operations []string) (*creditResponse, error) {
+	uuid := t.uuid.Load()
+	uuidStr, _ := uuid.(string)
+	if uuid == nil || uuidStr == "" {
+		return nil, errorUUIDNotSet
+	}
+	return t.creditManager.FetchCredits(uuidStr, t.service, operations)
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/internal/throttler/throttler.go b/vendor/github.com/uber/jaeger-client-go/internal/throttler/throttler.go
new file mode 100644
index 000000000..196ed69ca
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/internal/throttler/throttler.go
@@ -0,0 +1,32 @@
+// Copyright (c) 2018 The Jaeger Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package throttler
+
+// Throttler is used to rate limits operations. For example, given how debug spans
+// are always sampled, a throttler can be enabled per client to rate limit the amount
+// of debug spans a client can start.
+type Throttler interface {
+	// IsAllowed determines whether the operation should be allowed and not be
+	// throttled.
+	IsAllowed(operation string) bool
+}
+
+// DefaultThrottler doesn't throttle at all.
+type DefaultThrottler struct{}
+
+// IsAllowed implements Throttler#IsAllowed.
+func (t DefaultThrottler) IsAllowed(operation string) bool {
+	return true
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/interop.go b/vendor/github.com/uber/jaeger-client-go/interop.go
new file mode 100644
index 000000000..8402d087c
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/interop.go
@@ -0,0 +1,55 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"github.com/opentracing/opentracing-go"
+)
+
+// TODO this file should not be needed after TChannel PR.
+
+type formatKey int
+
+// SpanContextFormat is a constant used as OpenTracing Format.
+// Requires *SpanContext as carrier.
+// This format is intended for interop with TChannel or other Zipkin-like tracers.
+const SpanContextFormat formatKey = iota
+
+type jaegerTraceContextPropagator struct {
+	tracer *Tracer
+}
+
+func (p *jaegerTraceContextPropagator) Inject(
+	ctx SpanContext,
+	abstractCarrier interface{},
+) error {
+	carrier, ok := abstractCarrier.(*SpanContext)
+	if !ok {
+		return opentracing.ErrInvalidCarrier
+	}
+
+	carrier.CopyFrom(&ctx)
+	return nil
+}
+
+func (p *jaegerTraceContextPropagator) Extract(abstractCarrier interface{}) (SpanContext, error) {
+	carrier, ok := abstractCarrier.(*SpanContext)
+	if !ok {
+		return emptyContext, opentracing.ErrInvalidCarrier
+	}
+	ctx := new(SpanContext)
+	ctx.CopyFrom(carrier)
+	return *ctx, nil
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/jaeger_tag.go b/vendor/github.com/uber/jaeger-client-go/jaeger_tag.go
new file mode 100644
index 000000000..868b2a5b5
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/jaeger_tag.go
@@ -0,0 +1,84 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"fmt"
+
+	"github.com/opentracing/opentracing-go/log"
+
+	j "github.com/uber/jaeger-client-go/thrift-gen/jaeger"
+)
+
+type tags []*j.Tag
+
+// ConvertLogsToJaegerTags converts log Fields into jaeger tags.
+func ConvertLogsToJaegerTags(logFields []log.Field) []*j.Tag {
+	fields := tags(make([]*j.Tag, 0, len(logFields)))
+	for _, field := range logFields {
+		field.Marshal(&fields)
+	}
+	return fields
+}
+
+func (t *tags) EmitString(key, value string) {
+	*t = append(*t, &j.Tag{Key: key, VType: j.TagType_STRING, VStr: &value})
+}
+
+func (t *tags) EmitBool(key string, value bool) {
+	*t = append(*t, &j.Tag{Key: key, VType: j.TagType_BOOL, VBool: &value})
+}
+
+func (t *tags) EmitInt(key string, value int) {
+	vLong := int64(value)
+	*t = append(*t, &j.Tag{Key: key, VType: j.TagType_LONG, VLong: &vLong})
+}
+
+func (t *tags) EmitInt32(key string, value int32) {
+	vLong := int64(value)
+	*t = append(*t, &j.Tag{Key: key, VType: j.TagType_LONG, VLong: &vLong})
+}
+
+func (t *tags) EmitInt64(key string, value int64) {
+	*t = append(*t, &j.Tag{Key: key, VType: j.TagType_LONG, VLong: &value})
+}
+
+func (t *tags) EmitUint32(key string, value uint32) {
+	vLong := int64(value)
+	*t = append(*t, &j.Tag{Key: key, VType: j.TagType_LONG, VLong: &vLong})
+}
+
+func (t *tags) EmitUint64(key string, value uint64) {
+	vLong := int64(value)
+	*t = append(*t, &j.Tag{Key: key, VType: j.TagType_LONG, VLong: &vLong})
+}
+
+func (t *tags) EmitFloat32(key string, value float32) {
+	vDouble := float64(value)
+	*t = append(*t, &j.Tag{Key: key, VType: j.TagType_DOUBLE, VDouble: &vDouble})
+}
+
+func (t *tags) EmitFloat64(key string, value float64) {
+	*t = append(*t, &j.Tag{Key: key, VType: j.TagType_DOUBLE, VDouble: &value})
+}
+
+func (t *tags) EmitObject(key string, value interface{}) {
+	vStr := fmt.Sprintf("%+v", value)
+	*t = append(*t, &j.Tag{Key: key, VType: j.TagType_STRING, VStr: &vStr})
+}
+
+func (t *tags) EmitLazyLogger(value log.LazyLogger) {
+	value(t)
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/jaeger_thrift_span.go b/vendor/github.com/uber/jaeger-client-go/jaeger_thrift_span.go
new file mode 100644
index 000000000..6ce1caf87
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/jaeger_thrift_span.go
@@ -0,0 +1,179 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"time"
+
+	"github.com/opentracing/opentracing-go"
+
+	j "github.com/uber/jaeger-client-go/thrift-gen/jaeger"
+	"github.com/uber/jaeger-client-go/utils"
+)
+
+// BuildJaegerThrift builds jaeger span based on internal span.
+func BuildJaegerThrift(span *Span) *j.Span {
+	span.Lock()
+	defer span.Unlock()
+	startTime := utils.TimeToMicrosecondsSinceEpochInt64(span.startTime)
+	duration := span.duration.Nanoseconds() / int64(time.Microsecond)
+	jaegerSpan := &j.Span{
+		TraceIdLow:    int64(span.context.traceID.Low),
+		TraceIdHigh:   int64(span.context.traceID.High),
+		SpanId:        int64(span.context.spanID),
+		ParentSpanId:  int64(span.context.parentID),
+		OperationName: span.operationName,
+		Flags:         int32(span.context.flags),
+		StartTime:     startTime,
+		Duration:      duration,
+		Tags:          buildTags(span.tags, span.tracer.options.maxTagValueLength),
+		Logs:          buildLogs(span.logs),
+		References:    buildReferences(span.references),
+	}
+	return jaegerSpan
+}
+
+// BuildJaegerProcessThrift creates a thrift Process type.
+func BuildJaegerProcessThrift(span *Span) *j.Process {
+	span.Lock()
+	defer span.Unlock()
+	return buildJaegerProcessThrift(span.tracer)
+}
+
+func buildJaegerProcessThrift(tracer *Tracer) *j.Process {
+	process := &j.Process{
+		ServiceName: tracer.serviceName,
+		Tags:        buildTags(tracer.tags, tracer.options.maxTagValueLength),
+	}
+	if tracer.process.UUID != "" {
+		process.Tags = append(process.Tags, &j.Tag{Key: TracerUUIDTagKey, VStr: &tracer.process.UUID, VType: j.TagType_STRING})
+	}
+	return process
+}
+
+func buildTags(tags []Tag, maxTagValueLength int) []*j.Tag {
+	jTags := make([]*j.Tag, 0, len(tags))
+	for _, tag := range tags {
+		jTag := buildTag(&tag, maxTagValueLength)
+		jTags = append(jTags, jTag)
+	}
+	return jTags
+}
+
+func buildLogs(logs []opentracing.LogRecord) []*j.Log {
+	jLogs := make([]*j.Log, 0, len(logs))
+	for _, log := range logs {
+		jLog := &j.Log{
+			Timestamp: utils.TimeToMicrosecondsSinceEpochInt64(log.Timestamp),
+			Fields:    ConvertLogsToJaegerTags(log.Fields),
+		}
+		jLogs = append(jLogs, jLog)
+	}
+	return jLogs
+}
+
+func buildTag(tag *Tag, maxTagValueLength int) *j.Tag {
+	jTag := &j.Tag{Key: tag.key}
+	switch value := tag.value.(type) {
+	case string:
+		vStr := truncateString(value, maxTagValueLength)
+		jTag.VStr = &vStr
+		jTag.VType = j.TagType_STRING
+	case []byte:
+		if len(value) > maxTagValueLength {
+			value = value[:maxTagValueLength]
+		}
+		jTag.VBinary = value
+		jTag.VType = j.TagType_BINARY
+	case int:
+		vLong := int64(value)
+		jTag.VLong = &vLong
+		jTag.VType = j.TagType_LONG
+	case uint:
+		vLong := int64(value)
+		jTag.VLong = &vLong
+		jTag.VType = j.TagType_LONG
+	case int8:
+		vLong := int64(value)
+		jTag.VLong = &vLong
+		jTag.VType = j.TagType_LONG
+	case uint8:
+		vLong := int64(value)
+		jTag.VLong = &vLong
+		jTag.VType = j.TagType_LONG
+	case int16:
+		vLong := int64(value)
+		jTag.VLong = &vLong
+		jTag.VType = j.TagType_LONG
+	case uint16:
+		vLong := int64(value)
+		jTag.VLong = &vLong
+		jTag.VType = j.TagType_LONG
+	case int32:
+		vLong := int64(value)
+		jTag.VLong = &vLong
+		jTag.VType = j.TagType_LONG
+	case uint32:
+		vLong := int64(value)
+		jTag.VLong = &vLong
+		jTag.VType = j.TagType_LONG
+	case int64:
+		vLong := int64(value)
+		jTag.VLong = &vLong
+		jTag.VType = j.TagType_LONG
+	case uint64:
+		vLong := int64(value)
+		jTag.VLong = &vLong
+		jTag.VType = j.TagType_LONG
+	case float32:
+		vDouble := float64(value)
+		jTag.VDouble = &vDouble
+		jTag.VType = j.TagType_DOUBLE
+	case float64:
+		vDouble := float64(value)
+		jTag.VDouble = &vDouble
+		jTag.VType = j.TagType_DOUBLE
+	case bool:
+		vBool := value
+		jTag.VBool = &vBool
+		jTag.VType = j.TagType_BOOL
+	default:
+		vStr := truncateString(stringify(value), maxTagValueLength)
+		jTag.VStr = &vStr
+		jTag.VType = j.TagType_STRING
+	}
+	return jTag
+}
+
+func buildReferences(references []Reference) []*j.SpanRef {
+	retMe := make([]*j.SpanRef, 0, len(references))
+	for _, ref := range references {
+		if ref.Type == opentracing.ChildOfRef {
+			retMe = append(retMe, spanRef(ref.Context, j.SpanRefType_CHILD_OF))
+		} else if ref.Type == opentracing.FollowsFromRef {
+			retMe = append(retMe, spanRef(ref.Context, j.SpanRefType_FOLLOWS_FROM))
+		}
+	}
+	return retMe
+}
+
+func spanRef(ctx SpanContext, refType j.SpanRefType) *j.SpanRef {
+	return &j.SpanRef{
+		RefType:     refType,
+		TraceIdLow:  int64(ctx.traceID.Low),
+		TraceIdHigh: int64(ctx.traceID.High),
+		SpanId:      int64(ctx.spanID),
+	}
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/log/logger.go b/vendor/github.com/uber/jaeger-client-go/log/logger.go
new file mode 100644
index 000000000..894bb3dbf
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/log/logger.go
@@ -0,0 +1,90 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package log
+
+import (
+	"bytes"
+	"fmt"
+	"log"
+	"sync"
+)
+
+// Logger provides an abstract interface for logging from Reporters.
+// Applications can provide their own implementation of this interface to adapt
+// reporters logging to whatever logging library they prefer (stdlib log,
+// logrus, go-logging, etc).
+type Logger interface {
+	// Error logs a message at error priority
+	Error(msg string)
+
+	// Infof logs a message at info priority
+	Infof(msg string, args ...interface{})
+}
+
+// StdLogger is implementation of the Logger interface that delegates to default `log` package
+var StdLogger = &stdLogger{}
+
+type stdLogger struct{}
+
+func (l *stdLogger) Error(msg string) {
+	log.Printf("ERROR: %s", msg)
+}
+
+// Infof logs a message at info priority
+func (l *stdLogger) Infof(msg string, args ...interface{}) {
+	log.Printf(msg, args...)
+}
+
+// NullLogger is implementation of the Logger interface that is no-op
+var NullLogger = &nullLogger{}
+
+type nullLogger struct{}
+
+func (l *nullLogger) Error(msg string)                      {}
+func (l *nullLogger) Infof(msg string, args ...interface{}) {}
+
+// BytesBufferLogger implements Logger backed by a bytes.Buffer.
+type BytesBufferLogger struct {
+	mux sync.Mutex
+	buf bytes.Buffer
+}
+
+// Error implements Logger.
+func (l *BytesBufferLogger) Error(msg string) {
+	l.mux.Lock()
+	l.buf.WriteString(fmt.Sprintf("ERROR: %s\n", msg))
+	l.mux.Unlock()
+}
+
+// Infof implements Logger.
+func (l *BytesBufferLogger) Infof(msg string, args ...interface{}) {
+	l.mux.Lock()
+	l.buf.WriteString("INFO: " + fmt.Sprintf(msg, args...) + "\n")
+	l.mux.Unlock()
+}
+
+// String returns string representation of the underlying buffer.
+func (l *BytesBufferLogger) String() string {
+	l.mux.Lock()
+	defer l.mux.Unlock()
+	return l.buf.String()
+}
+
+// Flush empties the underlying buffer.
+func (l *BytesBufferLogger) Flush() {
+	l.mux.Lock()
+	defer l.mux.Unlock()
+	l.buf.Reset()
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/logger.go b/vendor/github.com/uber/jaeger-client-go/logger.go
new file mode 100644
index 000000000..d4f0b5019
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/logger.go
@@ -0,0 +1,53 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import "log"
+
+// NB This will be deprecated in 3.0.0, please use jaeger-client-go/log/logger instead.
+
+// Logger provides an abstract interface for logging from Reporters.
+// Applications can provide their own implementation of this interface to adapt
+// reporters logging to whatever logging library they prefer (stdlib log,
+// logrus, go-logging, etc).
+type Logger interface {
+	// Error logs a message at error priority
+	Error(msg string)
+
+	// Infof logs a message at info priority
+	Infof(msg string, args ...interface{})
+}
+
+// StdLogger is implementation of the Logger interface that delegates to default `log` package
+var StdLogger = &stdLogger{}
+
+type stdLogger struct{}
+
+func (l *stdLogger) Error(msg string) {
+	log.Printf("ERROR: %s", msg)
+}
+
+// Infof logs a message at info priority
+func (l *stdLogger) Infof(msg string, args ...interface{}) {
+	log.Printf(msg, args...)
+}
+
+// NullLogger is implementation of the Logger interface that delegates to default `log` package
+var NullLogger = &nullLogger{}
+
+type nullLogger struct{}
+
+func (l *nullLogger) Error(msg string)                      {}
+func (l *nullLogger) Infof(msg string, args ...interface{}) {}
diff --git a/vendor/github.com/uber/jaeger-client-go/metrics.go b/vendor/github.com/uber/jaeger-client-go/metrics.go
new file mode 100644
index 000000000..cadb2b9c0
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/metrics.go
@@ -0,0 +1,107 @@
+// Copyright (c) 2017-2018 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"github.com/uber/jaeger-lib/metrics"
+)
+
+// Metrics is a container of all stats emitted by Jaeger tracer.
+type Metrics struct {
+	// Number of traces started by this tracer as sampled
+	TracesStartedSampled metrics.Counter `metric:"traces" tags:"state=started,sampled=y"`
+
+	// Number of traces started by this tracer as not sampled
+	TracesStartedNotSampled metrics.Counter `metric:"traces" tags:"state=started,sampled=n"`
+
+	// Number of externally started sampled traces this tracer joined
+	TracesJoinedSampled metrics.Counter `metric:"traces" tags:"state=joined,sampled=y"`
+
+	// Number of externally started not-sampled traces this tracer joined
+	TracesJoinedNotSampled metrics.Counter `metric:"traces" tags:"state=joined,sampled=n"`
+
+	// Number of sampled spans started by this tracer
+	SpansStartedSampled metrics.Counter `metric:"started_spans" tags:"sampled=y"`
+
+	// Number of unsampled spans started by this tracer
+	SpansStartedNotSampled metrics.Counter `metric:"started_spans" tags:"sampled=n"`
+
+	// Number of spans finished by this tracer
+	SpansFinished metrics.Counter `metric:"finished_spans"`
+
+	// Number of errors decoding tracing context
+	DecodingErrors metrics.Counter `metric:"span_context_decoding_errors"`
+
+	// Number of spans successfully reported
+	ReporterSuccess metrics.Counter `metric:"reporter_spans" tags:"result=ok"`
+
+	// Number of spans not reported due to a Sender failure
+	ReporterFailure metrics.Counter `metric:"reporter_spans" tags:"result=err"`
+
+	// Number of spans dropped due to internal queue overflow
+	ReporterDropped metrics.Counter `metric:"reporter_spans" tags:"result=dropped"`
+
+	// Current number of spans in the reporter queue
+	ReporterQueueLength metrics.Gauge `metric:"reporter_queue_length"`
+
+	// Number of times the Sampler succeeded to retrieve sampling strategy
+	SamplerRetrieved metrics.Counter `metric:"sampler_queries" tags:"result=ok"`
+
+	// Number of times the Sampler failed to retrieve sampling strategy
+	SamplerQueryFailure metrics.Counter `metric:"sampler_queries" tags:"result=err"`
+
+	// Number of times the Sampler succeeded to retrieve and update sampling strategy
+	SamplerUpdated metrics.Counter `metric:"sampler_updates" tags:"result=ok"`
+
+	// Number of times the Sampler failed to update sampling strategy
+	SamplerUpdateFailure metrics.Counter `metric:"sampler_updates" tags:"result=err"`
+
+	// Number of times baggage was successfully written or updated on spans.
+	BaggageUpdateSuccess metrics.Counter `metric:"baggage_updates" tags:"result=ok"`
+
+	// Number of times baggage failed to write or update on spans.
+	BaggageUpdateFailure metrics.Counter `metric:"baggage_updates" tags:"result=err"`
+
+	// Number of times baggage was truncated as per baggage restrictions.
+	BaggageTruncate metrics.Counter `metric:"baggage_truncations"`
+
+	// Number of times baggage restrictions were successfully updated.
+	BaggageRestrictionsUpdateSuccess metrics.Counter `metric:"baggage_restrictions_updates" tags:"result=ok"`
+
+	// Number of times baggage restrictions failed to update.
+	BaggageRestrictionsUpdateFailure metrics.Counter `metric:"baggage_restrictions_updates" tags:"result=err"`
+
+	// Number of times debug spans were throttled.
+	ThrottledDebugSpans metrics.Counter `metric:"throttled_debug_spans"`
+
+	// Number of times throttler successfully updated.
+	ThrottlerUpdateSuccess metrics.Counter `metric:"throttler_updates" tags:"result=ok"`
+
+	// Number of times throttler failed to update.
+	ThrottlerUpdateFailure metrics.Counter `metric:"throttler_updates" tags:"result=err"`
+}
+
+// NewMetrics creates a new Metrics struct and initializes it.
+func NewMetrics(factory metrics.Factory, globalTags map[string]string) *Metrics {
+	m := &Metrics{}
+	// TODO the namespace "jaeger" should be configurable (e.g. in all-in-one "jaeger-client" would make more sense)
+	metrics.Init(m, factory.Namespace("jaeger", nil), globalTags)
+	return m
+}
+
+// NewNullMetrics creates a new Metrics struct that won't report any metrics.
+func NewNullMetrics() *Metrics {
+	return NewMetrics(metrics.NullFactory, nil)
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/observer.go b/vendor/github.com/uber/jaeger-client-go/observer.go
new file mode 100644
index 000000000..7bbd02889
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/observer.go
@@ -0,0 +1,88 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import opentracing "github.com/opentracing/opentracing-go"
+
+// Observer can be registered with the Tracer to receive notifications about
+// new Spans.
+//
+// Deprecated: use jaeger.ContribObserver instead.
+type Observer interface {
+	OnStartSpan(operationName string, options opentracing.StartSpanOptions) SpanObserver
+}
+
+// SpanObserver is created by the Observer and receives notifications about
+// other Span events.
+//
+// Deprecated: use jaeger.ContribSpanObserver instead.
+type SpanObserver interface {
+	OnSetOperationName(operationName string)
+	OnSetTag(key string, value interface{})
+	OnFinish(options opentracing.FinishOptions)
+}
+
+// compositeObserver is a dispatcher to other observers
+type compositeObserver struct {
+	observers []ContribObserver
+}
+
+// compositeSpanObserver is a dispatcher to other span observers
+type compositeSpanObserver struct {
+	observers []ContribSpanObserver
+}
+
+// noopSpanObserver is used when there are no observers registered
+// on the Tracer or none of them returns span observers from OnStartSpan.
+var noopSpanObserver = &compositeSpanObserver{}
+
+func (o *compositeObserver) append(contribObserver ContribObserver) {
+	o.observers = append(o.observers, contribObserver)
+}
+
+func (o *compositeObserver) OnStartSpan(sp opentracing.Span, operationName string, options opentracing.StartSpanOptions) ContribSpanObserver {
+	var spanObservers []ContribSpanObserver
+	for _, obs := range o.observers {
+		spanObs, ok := obs.OnStartSpan(sp, operationName, options)
+		if ok {
+			if spanObservers == nil {
+				spanObservers = make([]ContribSpanObserver, 0, len(o.observers))
+			}
+			spanObservers = append(spanObservers, spanObs)
+		}
+	}
+	if len(spanObservers) == 0 {
+		return noopSpanObserver
+	}
+	return &compositeSpanObserver{observers: spanObservers}
+}
+
+func (o *compositeSpanObserver) OnSetOperationName(operationName string) {
+	for _, obs := range o.observers {
+		obs.OnSetOperationName(operationName)
+	}
+}
+
+func (o *compositeSpanObserver) OnSetTag(key string, value interface{}) {
+	for _, obs := range o.observers {
+		obs.OnSetTag(key, value)
+	}
+}
+
+func (o *compositeSpanObserver) OnFinish(options opentracing.FinishOptions) {
+	for _, obs := range o.observers {
+		obs.OnFinish(options)
+	}
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/process.go b/vendor/github.com/uber/jaeger-client-go/process.go
new file mode 100644
index 000000000..30cbf9962
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/process.go
@@ -0,0 +1,29 @@
+// Copyright (c) 2018 The Jaeger Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+// Process holds process specific metadata that's relevant to this client.
+type Process struct {
+	Service string
+	UUID    string
+	Tags    []Tag
+}
+
+// ProcessSetter sets a process. This can be used by any class that requires
+// the process to be set as part of initialization.
+// See internal/throttler/remote/throttler.go for an example.
+type ProcessSetter interface {
+	SetProcess(process Process)
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/propagation.go b/vendor/github.com/uber/jaeger-client-go/propagation.go
new file mode 100644
index 000000000..abca67a3c
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/propagation.go
@@ -0,0 +1,300 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"bytes"
+	"encoding/binary"
+	"fmt"
+	"io"
+	"log"
+	"net/url"
+	"strings"
+	"sync"
+
+	opentracing "github.com/opentracing/opentracing-go"
+)
+
+// Injector is responsible for injecting SpanContext instances in a manner suitable
+// for propagation via a format-specific "carrier" object. Typically the
+// injection will take place across an RPC boundary, but message queues and
+// other IPC mechanisms are also reasonable places to use an Injector.
+type Injector interface {
+	// Inject takes `SpanContext` and injects it into `carrier`. The actual type
+	// of `carrier` depends on the `format` passed to `Tracer.Inject()`.
+	//
+	// Implementations may return opentracing.ErrInvalidCarrier or any other
+	// implementation-specific error if injection fails.
+	Inject(ctx SpanContext, carrier interface{}) error
+}
+
+// Extractor is responsible for extracting SpanContext instances from a
+// format-specific "carrier" object. Typically the extraction will take place
+// on the server side of an RPC boundary, but message queues and other IPC
+// mechanisms are also reasonable places to use an Extractor.
+type Extractor interface {
+	// Extract decodes a SpanContext instance from the given `carrier`,
+	// or (nil, opentracing.ErrSpanContextNotFound) if no context could
+	// be found in the `carrier`.
+	Extract(carrier interface{}) (SpanContext, error)
+}
+
+type textMapPropagator struct {
+	headerKeys  *HeadersConfig
+	metrics     Metrics
+	encodeValue func(string) string
+	decodeValue func(string) string
+}
+
+func newTextMapPropagator(headerKeys *HeadersConfig, metrics Metrics) *textMapPropagator {
+	return &textMapPropagator{
+		headerKeys: headerKeys,
+		metrics:    metrics,
+		encodeValue: func(val string) string {
+			return val
+		},
+		decodeValue: func(val string) string {
+			return val
+		},
+	}
+}
+
+func newHTTPHeaderPropagator(headerKeys *HeadersConfig, metrics Metrics) *textMapPropagator {
+	return &textMapPropagator{
+		headerKeys: headerKeys,
+		metrics:    metrics,
+		encodeValue: func(val string) string {
+			return url.QueryEscape(val)
+		},
+		decodeValue: func(val string) string {
+			// ignore decoding errors, cannot do anything about them
+			if v, err := url.QueryUnescape(val); err == nil {
+				return v
+			}
+			return val
+		},
+	}
+}
+
+type binaryPropagator struct {
+	tracer  *Tracer
+	buffers sync.Pool
+}
+
+func newBinaryPropagator(tracer *Tracer) *binaryPropagator {
+	return &binaryPropagator{
+		tracer:  tracer,
+		buffers: sync.Pool{New: func() interface{} { return &bytes.Buffer{} }},
+	}
+}
+
+func (p *textMapPropagator) Inject(
+	sc SpanContext,
+	abstractCarrier interface{},
+) error {
+	textMapWriter, ok := abstractCarrier.(opentracing.TextMapWriter)
+	if !ok {
+		return opentracing.ErrInvalidCarrier
+	}
+
+	// Do not encode the string with trace context to avoid accidental double-encoding
+	// if people are using opentracing < 0.10.0. Our colon-separated representation
+	// of the trace context is already safe for HTTP headers.
+	textMapWriter.Set(p.headerKeys.TraceContextHeaderName, sc.String())
+	for k, v := range sc.baggage {
+		safeKey := p.addBaggageKeyPrefix(k)
+		safeVal := p.encodeValue(v)
+		textMapWriter.Set(safeKey, safeVal)
+	}
+	return nil
+}
+
+func (p *textMapPropagator) Extract(abstractCarrier interface{}) (SpanContext, error) {
+	textMapReader, ok := abstractCarrier.(opentracing.TextMapReader)
+	if !ok {
+		return emptyContext, opentracing.ErrInvalidCarrier
+	}
+	var ctx SpanContext
+	var baggage map[string]string
+	err := textMapReader.ForeachKey(func(rawKey, value string) error {
+		key := strings.ToLower(rawKey) // TODO not necessary for plain TextMap
+		if key == p.headerKeys.TraceContextHeaderName {
+			var err error
+			safeVal := p.decodeValue(value)
+			if ctx, err = ContextFromString(safeVal); err != nil {
+				return err
+			}
+		} else if key == p.headerKeys.JaegerDebugHeader {
+			ctx.debugID = p.decodeValue(value)
+		} else if key == p.headerKeys.JaegerBaggageHeader {
+			if baggage == nil {
+				baggage = make(map[string]string)
+			}
+			for k, v := range p.parseCommaSeparatedMap(value) {
+				baggage[k] = v
+			}
+		} else if strings.HasPrefix(key, p.headerKeys.TraceBaggageHeaderPrefix) {
+			if baggage == nil {
+				baggage = make(map[string]string)
+			}
+			safeKey := p.removeBaggageKeyPrefix(key)
+			safeVal := p.decodeValue(value)
+			baggage[safeKey] = safeVal
+		}
+		return nil
+	})
+	if err != nil {
+		p.metrics.DecodingErrors.Inc(1)
+		return emptyContext, err
+	}
+	if !ctx.traceID.IsValid() && ctx.debugID == "" && len(baggage) == 0 {
+		return emptyContext, opentracing.ErrSpanContextNotFound
+	}
+	ctx.baggage = baggage
+	return ctx, nil
+}
+
+func (p *binaryPropagator) Inject(
+	sc SpanContext,
+	abstractCarrier interface{},
+) error {
+	carrier, ok := abstractCarrier.(io.Writer)
+	if !ok {
+		return opentracing.ErrInvalidCarrier
+	}
+
+	// Handle the tracer context
+	if err := binary.Write(carrier, binary.BigEndian, sc.traceID); err != nil {
+		return err
+	}
+	if err := binary.Write(carrier, binary.BigEndian, sc.spanID); err != nil {
+		return err
+	}
+	if err := binary.Write(carrier, binary.BigEndian, sc.parentID); err != nil {
+		return err
+	}
+	if err := binary.Write(carrier, binary.BigEndian, sc.flags); err != nil {
+		return err
+	}
+
+	// Handle the baggage items
+	if err := binary.Write(carrier, binary.BigEndian, int32(len(sc.baggage))); err != nil {
+		return err
+	}
+	for k, v := range sc.baggage {
+		if err := binary.Write(carrier, binary.BigEndian, int32(len(k))); err != nil {
+			return err
+		}
+		io.WriteString(carrier, k)
+		if err := binary.Write(carrier, binary.BigEndian, int32(len(v))); err != nil {
+			return err
+		}
+		io.WriteString(carrier, v)
+	}
+
+	return nil
+}
+
+func (p *binaryPropagator) Extract(abstractCarrier interface{}) (SpanContext, error) {
+	carrier, ok := abstractCarrier.(io.Reader)
+	if !ok {
+		return emptyContext, opentracing.ErrInvalidCarrier
+	}
+	var ctx SpanContext
+
+	if err := binary.Read(carrier, binary.BigEndian, &ctx.traceID); err != nil {
+		return emptyContext, opentracing.ErrSpanContextCorrupted
+	}
+	if err := binary.Read(carrier, binary.BigEndian, &ctx.spanID); err != nil {
+		return emptyContext, opentracing.ErrSpanContextCorrupted
+	}
+	if err := binary.Read(carrier, binary.BigEndian, &ctx.parentID); err != nil {
+		return emptyContext, opentracing.ErrSpanContextCorrupted
+	}
+	if err := binary.Read(carrier, binary.BigEndian, &ctx.flags); err != nil {
+		return emptyContext, opentracing.ErrSpanContextCorrupted
+	}
+
+	// Handle the baggage items
+	var numBaggage int32
+	if err := binary.Read(carrier, binary.BigEndian, &numBaggage); err != nil {
+		return emptyContext, opentracing.ErrSpanContextCorrupted
+	}
+	if iNumBaggage := int(numBaggage); iNumBaggage > 0 {
+		ctx.baggage = make(map[string]string, iNumBaggage)
+		buf := p.buffers.Get().(*bytes.Buffer)
+		defer p.buffers.Put(buf)
+
+		var keyLen, valLen int32
+		for i := 0; i < iNumBaggage; i++ {
+			if err := binary.Read(carrier, binary.BigEndian, &keyLen); err != nil {
+				return emptyContext, opentracing.ErrSpanContextCorrupted
+			}
+			buf.Reset()
+			buf.Grow(int(keyLen))
+			if n, err := io.CopyN(buf, carrier, int64(keyLen)); err != nil || int32(n) != keyLen {
+				return emptyContext, opentracing.ErrSpanContextCorrupted
+			}
+			key := buf.String()
+
+			if err := binary.Read(carrier, binary.BigEndian, &valLen); err != nil {
+				return emptyContext, opentracing.ErrSpanContextCorrupted
+			}
+			buf.Reset()
+			buf.Grow(int(valLen))
+			if n, err := io.CopyN(buf, carrier, int64(valLen)); err != nil || int32(n) != valLen {
+				return emptyContext, opentracing.ErrSpanContextCorrupted
+			}
+			ctx.baggage[key] = buf.String()
+		}
+	}
+
+	return ctx, nil
+}
+
+// Converts a comma separated key value pair list into a map
+// e.g. key1=value1, key2=value2, key3 = value3
+// is converted to map[string]string { "key1" : "value1",
+//                                     "key2" : "value2",
+//                                     "key3" : "value3" }
+func (p *textMapPropagator) parseCommaSeparatedMap(value string) map[string]string {
+	baggage := make(map[string]string)
+	value, err := url.QueryUnescape(value)
+	if err != nil {
+		log.Printf("Unable to unescape %s, %v", value, err)
+		return baggage
+	}
+	for _, kvpair := range strings.Split(value, ",") {
+		kv := strings.Split(strings.TrimSpace(kvpair), "=")
+		if len(kv) == 2 {
+			baggage[kv[0]] = kv[1]
+		} else {
+			log.Printf("Malformed value passed in for %s", p.headerKeys.JaegerBaggageHeader)
+		}
+	}
+	return baggage
+}
+
+// Converts a baggage item key into an http header format,
+// by prepending TraceBaggageHeaderPrefix and encoding the key string
+func (p *textMapPropagator) addBaggageKeyPrefix(key string) string {
+	// TODO encodeBaggageKeyAsHeader add caching and escaping
+	return fmt.Sprintf("%v%v", p.headerKeys.TraceBaggageHeaderPrefix, key)
+}
+
+func (p *textMapPropagator) removeBaggageKeyPrefix(key string) string {
+	// TODO decodeBaggageHeaderKey add caching and escaping
+	return key[len(p.headerKeys.TraceBaggageHeaderPrefix):]
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/reference.go b/vendor/github.com/uber/jaeger-client-go/reference.go
new file mode 100644
index 000000000..5646e78bb
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/reference.go
@@ -0,0 +1,23 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import "github.com/opentracing/opentracing-go"
+
+// Reference represents a causal reference to other Spans (via their SpanContext).
+type Reference struct {
+	Type    opentracing.SpanReferenceType
+	Context SpanContext
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/reporter.go b/vendor/github.com/uber/jaeger-client-go/reporter.go
new file mode 100644
index 000000000..fe6288c4b
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/reporter.go
@@ -0,0 +1,289 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"fmt"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	"github.com/opentracing/opentracing-go"
+
+	"github.com/uber/jaeger-client-go/log"
+)
+
+// Reporter is called by the tracer when a span is completed to report the span to the tracing collector.
+type Reporter interface {
+	// Report submits a new span to collectors, possibly asynchronously and/or with buffering.
+	Report(span *Span)
+
+	// Close does a clean shutdown of the reporter, flushing any traces that may be buffered in memory.
+	Close()
+}
+
+// ------------------------------
+
+type nullReporter struct{}
+
+// NewNullReporter creates a no-op reporter that ignores all reported spans.
+func NewNullReporter() Reporter {
+	return &nullReporter{}
+}
+
+// Report implements Report() method of Reporter by doing nothing.
+func (r *nullReporter) Report(span *Span) {
+	// no-op
+}
+
+// Close implements Close() method of Reporter by doing nothing.
+func (r *nullReporter) Close() {
+	// no-op
+}
+
+// ------------------------------
+
+type loggingReporter struct {
+	logger Logger
+}
+
+// NewLoggingReporter creates a reporter that logs all reported spans to provided logger.
+func NewLoggingReporter(logger Logger) Reporter {
+	return &loggingReporter{logger}
+}
+
+// Report implements Report() method of Reporter by logging the span to the logger.
+func (r *loggingReporter) Report(span *Span) {
+	r.logger.Infof("Reporting span %+v", span)
+}
+
+// Close implements Close() method of Reporter by doing nothing.
+func (r *loggingReporter) Close() {
+	// no-op
+}
+
+// ------------------------------
+
+// InMemoryReporter is used for testing, and simply collects spans in memory.
+type InMemoryReporter struct {
+	spans []opentracing.Span
+	lock  sync.Mutex
+}
+
+// NewInMemoryReporter creates a reporter that stores spans in memory.
+// NOTE: the Tracer should be created with options.PoolSpans = false.
+func NewInMemoryReporter() *InMemoryReporter {
+	return &InMemoryReporter{
+		spans: make([]opentracing.Span, 0, 10),
+	}
+}
+
+// Report implements Report() method of Reporter by storing the span in the buffer.
+func (r *InMemoryReporter) Report(span *Span) {
+	r.lock.Lock()
+	r.spans = append(r.spans, span)
+	r.lock.Unlock()
+}
+
+// Close implements Close() method of Reporter by doing nothing.
+func (r *InMemoryReporter) Close() {
+	// no-op
+}
+
+// SpansSubmitted returns the number of spans accumulated in the buffer.
+func (r *InMemoryReporter) SpansSubmitted() int {
+	r.lock.Lock()
+	defer r.lock.Unlock()
+	return len(r.spans)
+}
+
+// GetSpans returns accumulated spans as a copy of the buffer.
+func (r *InMemoryReporter) GetSpans() []opentracing.Span {
+	r.lock.Lock()
+	defer r.lock.Unlock()
+	copied := make([]opentracing.Span, len(r.spans))
+	copy(copied, r.spans)
+	return copied
+}
+
+// Reset clears all accumulated spans.
+func (r *InMemoryReporter) Reset() {
+	r.lock.Lock()
+	defer r.lock.Unlock()
+	r.spans = nil
+}
+
+// ------------------------------
+
+type compositeReporter struct {
+	reporters []Reporter
+}
+
+// NewCompositeReporter creates a reporter that ignores all reported spans.
+func NewCompositeReporter(reporters ...Reporter) Reporter {
+	return &compositeReporter{reporters: reporters}
+}
+
+// Report implements Report() method of Reporter by delegating to each underlying reporter.
+func (r *compositeReporter) Report(span *Span) {
+	for _, reporter := range r.reporters {
+		reporter.Report(span)
+	}
+}
+
+// Close implements Close() method of Reporter by closing each underlying reporter.
+func (r *compositeReporter) Close() {
+	for _, reporter := range r.reporters {
+		reporter.Close()
+	}
+}
+
+// ------------- REMOTE REPORTER -----------------
+
+type reporterQueueItemType int
+
+const (
+	defaultQueueSize           = 100
+	defaultBufferFlushInterval = 1 * time.Second
+
+	reporterQueueItemSpan reporterQueueItemType = iota
+	reporterQueueItemClose
+)
+
+type reporterQueueItem struct {
+	itemType reporterQueueItemType
+	span     *Span
+	close    *sync.WaitGroup
+}
+
+type remoteReporter struct {
+	// These fields must be first in the struct because `sync/atomic` expects 64-bit alignment.
+	// Cf. https://github.com/uber/jaeger-client-go/issues/155, https://goo.gl/zW7dgq
+	queueLength int64
+	closed      int64 // 0 - not closed, 1 - closed
+
+	reporterOptions
+
+	sender Transport
+	queue  chan reporterQueueItem
+}
+
+// NewRemoteReporter creates a new reporter that sends spans out of process by means of Sender.
+// Calls to Report(Span) return immediately (side effect: if internal buffer is full the span is dropped).
+// Periodically the transport buffer is flushed even if it hasn't reached max packet size.
+// Calls to Close() block until all spans reported prior to the call to Close are flushed.
+func NewRemoteReporter(sender Transport, opts ...ReporterOption) Reporter {
+	options := reporterOptions{}
+	for _, option := range opts {
+		option(&options)
+	}
+	if options.bufferFlushInterval <= 0 {
+		options.bufferFlushInterval = defaultBufferFlushInterval
+	}
+	if options.logger == nil {
+		options.logger = log.NullLogger
+	}
+	if options.metrics == nil {
+		options.metrics = NewNullMetrics()
+	}
+	if options.queueSize <= 0 {
+		options.queueSize = defaultQueueSize
+	}
+	reporter := &remoteReporter{
+		reporterOptions: options,
+		sender:          sender,
+		queue:           make(chan reporterQueueItem, options.queueSize),
+	}
+	go reporter.processQueue()
+	return reporter
+}
+
+// Report implements Report() method of Reporter.
+// It passes the span to a background go-routine for submission to Jaeger backend.
+// If the internal queue is full, the span is dropped and metrics.ReporterDropped counter is incremented.
+// If Report() is called after the reporter has been Close()-ed, the additional spans will not be
+// sent to the backend, but the metrics.ReporterDropped counter may not reflect them correctly,
+// because some of them may still be successfully added to the queue.
+func (r *remoteReporter) Report(span *Span) {
+	select {
+	case r.queue <- reporterQueueItem{itemType: reporterQueueItemSpan, span: span}:
+		atomic.AddInt64(&r.queueLength, 1)
+	default:
+		r.metrics.ReporterDropped.Inc(1)
+	}
+}
+
+// Close implements Close() method of Reporter by waiting for the queue to be drained.
+func (r *remoteReporter) Close() {
+	if swapped := atomic.CompareAndSwapInt64(&r.closed, 0, 1); !swapped {
+		r.logger.Error("Repeated attempt to close the reporter is ignored")
+		return
+	}
+	r.sendCloseEvent()
+	r.sender.Close()
+}
+
+func (r *remoteReporter) sendCloseEvent() {
+	wg := &sync.WaitGroup{}
+	wg.Add(1)
+	item := reporterQueueItem{itemType: reporterQueueItemClose, close: wg}
+
+	r.queue <- item // if the queue is full we will block until there is space
+	atomic.AddInt64(&r.queueLength, 1)
+	wg.Wait()
+}
+
+// processQueue reads spans from the queue, converts them to Thrift, and stores them in an internal buffer.
+// When the buffer length reaches batchSize, it is flushed by submitting the accumulated spans to Jaeger.
+// Buffer also gets flushed automatically every batchFlushInterval seconds, just in case the tracer stopped
+// reporting new spans.
+func (r *remoteReporter) processQueue() {
+	// flush causes the Sender to flush its accumulated spans and clear the buffer
+	flush := func() {
+		if flushed, err := r.sender.Flush(); err != nil {
+			r.metrics.ReporterFailure.Inc(int64(flushed))
+			r.logger.Error(fmt.Sprintf("error when flushing the buffer: %s", err.Error()))
+		} else if flushed > 0 {
+			r.metrics.ReporterSuccess.Inc(int64(flushed))
+		}
+	}
+
+	timer := time.NewTicker(r.bufferFlushInterval)
+	for {
+		select {
+		case <-timer.C:
+			flush()
+		case item := <-r.queue:
+			atomic.AddInt64(&r.queueLength, -1)
+			switch item.itemType {
+			case reporterQueueItemSpan:
+				span := item.span
+				if flushed, err := r.sender.Append(span); err != nil {
+					r.metrics.ReporterFailure.Inc(int64(flushed))
+					r.logger.Error(fmt.Sprintf("error reporting span %q: %s", span.OperationName(), err.Error()))
+				} else if flushed > 0 {
+					r.metrics.ReporterSuccess.Inc(int64(flushed))
+					// to reduce the number of gauge stats, we only emit queue length on flush
+					r.metrics.ReporterQueueLength.Update(atomic.LoadInt64(&r.queueLength))
+				}
+			case reporterQueueItemClose:
+				timer.Stop()
+				flush()
+				item.close.Done()
+				return
+			}
+		}
+	}
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/reporter_options.go b/vendor/github.com/uber/jaeger-client-go/reporter_options.go
new file mode 100644
index 000000000..65012d701
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/reporter_options.go
@@ -0,0 +1,69 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"time"
+)
+
+// ReporterOption is a function that sets some option on the reporter.
+type ReporterOption func(c *reporterOptions)
+
+// ReporterOptions is a factory for all available ReporterOption's
+var ReporterOptions reporterOptions
+
+// reporterOptions control behavior of the reporter.
+type reporterOptions struct {
+	// queueSize is the size of internal queue where reported spans are stored before they are processed in the background
+	queueSize int
+	// bufferFlushInterval is how often the buffer is force-flushed, even if it's not full
+	bufferFlushInterval time.Duration
+	// logger is used to log errors of span submissions
+	logger Logger
+	// metrics is used to record runtime stats
+	metrics *Metrics
+}
+
+// QueueSize creates a ReporterOption that sets the size of the internal queue where
+// spans are stored before they are processed.
+func (reporterOptions) QueueSize(queueSize int) ReporterOption {
+	return func(r *reporterOptions) {
+		r.queueSize = queueSize
+	}
+}
+
+// Metrics creates a ReporterOption that initializes Metrics in the reporter,
+// which is used to record runtime statistics.
+func (reporterOptions) Metrics(metrics *Metrics) ReporterOption {
+	return func(r *reporterOptions) {
+		r.metrics = metrics
+	}
+}
+
+// BufferFlushInterval creates a ReporterOption that sets how often the queue
+// is force-flushed.
+func (reporterOptions) BufferFlushInterval(bufferFlushInterval time.Duration) ReporterOption {
+	return func(r *reporterOptions) {
+		r.bufferFlushInterval = bufferFlushInterval
+	}
+}
+
+// Logger creates a ReporterOption that initializes the logger used to log
+// errors of span submissions.
+func (reporterOptions) Logger(logger Logger) ReporterOption {
+	return func(r *reporterOptions) {
+		r.logger = logger
+	}
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/rpcmetrics/README.md b/vendor/github.com/uber/jaeger-client-go/rpcmetrics/README.md
new file mode 100644
index 000000000..879948e9c
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/rpcmetrics/README.md
@@ -0,0 +1,5 @@
+An Observer that can be used to emit RPC metrics
+================================================
+
+It can be attached to the tracer during tracer construction.
+See `ExampleObserver` function in [observer_test.go](./observer_test.go).
diff --git a/vendor/github.com/uber/jaeger-client-go/rpcmetrics/doc.go b/vendor/github.com/uber/jaeger-client-go/rpcmetrics/doc.go
new file mode 100644
index 000000000..51aa11b35
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/rpcmetrics/doc.go
@@ -0,0 +1,16 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package rpcmetrics implements an Observer that can be used to emit RPC metrics.
+package rpcmetrics
diff --git a/vendor/github.com/uber/jaeger-client-go/rpcmetrics/endpoints.go b/vendor/github.com/uber/jaeger-client-go/rpcmetrics/endpoints.go
new file mode 100644
index 000000000..30555243d
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/rpcmetrics/endpoints.go
@@ -0,0 +1,63 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package rpcmetrics
+
+import "sync"
+
+// normalizedEndpoints is a cache for endpointName -> safeName mappings.
+type normalizedEndpoints struct {
+	names       map[string]string
+	maxSize     int
+	defaultName string
+	normalizer  NameNormalizer
+	mux         sync.RWMutex
+}
+
+func newNormalizedEndpoints(maxSize int, normalizer NameNormalizer) *normalizedEndpoints {
+	return &normalizedEndpoints{
+		maxSize:    maxSize,
+		normalizer: normalizer,
+		names:      make(map[string]string, maxSize),
+	}
+}
+
+// normalize looks up the name in the cache, if not found it uses normalizer
+// to convert the name to a safe name. If called with more than maxSize unique
+// names it returns "" for all other names beyond those already cached.
+func (n *normalizedEndpoints) normalize(name string) string {
+	n.mux.RLock()
+	norm, ok := n.names[name]
+	l := len(n.names)
+	n.mux.RUnlock()
+	if ok {
+		return norm
+	}
+	if l >= n.maxSize {
+		return ""
+	}
+	return n.normalizeWithLock(name)
+}
+
+func (n *normalizedEndpoints) normalizeWithLock(name string) string {
+	norm := n.normalizer.Normalize(name)
+	n.mux.Lock()
+	defer n.mux.Unlock()
+	// cache may have grown while we were not holding the lock
+	if len(n.names) >= n.maxSize {
+		return ""
+	}
+	n.names[name] = norm
+	return norm
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/rpcmetrics/metrics.go b/vendor/github.com/uber/jaeger-client-go/rpcmetrics/metrics.go
new file mode 100644
index 000000000..ab8d74c29
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/rpcmetrics/metrics.go
@@ -0,0 +1,124 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package rpcmetrics
+
+import (
+	"sync"
+
+	"github.com/uber/jaeger-lib/metrics"
+)
+
+const (
+	otherEndpointsPlaceholder = "other"
+	endpointNameMetricTag     = "endpoint"
+)
+
+// Metrics is a collection of metrics for an endpoint describing
+// throughput, success, errors, and performance.
+type Metrics struct {
+	// RequestCountSuccess is a counter of the total number of successes.
+	RequestCountSuccess metrics.Counter `metric:"requests" tags:"error=false"`
+
+	// RequestCountFailures is a counter of the number of times any failure has been observed.
+	RequestCountFailures metrics.Counter `metric:"requests" tags:"error=true"`
+
+	// RequestLatencySuccess is a latency histogram of succesful requests.
+	RequestLatencySuccess metrics.Timer `metric:"request_latency" tags:"error=false"`
+
+	// RequestLatencyFailures is a latency histogram of failed requests.
+	RequestLatencyFailures metrics.Timer `metric:"request_latency" tags:"error=true"`
+
+	// HTTPStatusCode2xx is a counter of the total number of requests with HTTP status code 200-299
+	HTTPStatusCode2xx metrics.Counter `metric:"http_requests" tags:"status_code=2xx"`
+
+	// HTTPStatusCode3xx is a counter of the total number of requests with HTTP status code 300-399
+	HTTPStatusCode3xx metrics.Counter `metric:"http_requests" tags:"status_code=3xx"`
+
+	// HTTPStatusCode4xx is a counter of the total number of requests with HTTP status code 400-499
+	HTTPStatusCode4xx metrics.Counter `metric:"http_requests" tags:"status_code=4xx"`
+
+	// HTTPStatusCode5xx is a counter of the total number of requests with HTTP status code 500-599
+	HTTPStatusCode5xx metrics.Counter `metric:"http_requests" tags:"status_code=5xx"`
+}
+
+func (m *Metrics) recordHTTPStatusCode(statusCode uint16) {
+	if statusCode >= 200 && statusCode < 300 {
+		m.HTTPStatusCode2xx.Inc(1)
+	} else if statusCode >= 300 && statusCode < 400 {
+		m.HTTPStatusCode3xx.Inc(1)
+	} else if statusCode >= 400 && statusCode < 500 {
+		m.HTTPStatusCode4xx.Inc(1)
+	} else if statusCode >= 500 && statusCode < 600 {
+		m.HTTPStatusCode5xx.Inc(1)
+	}
+}
+
+// MetricsByEndpoint is a registry/cache of metrics for each unique endpoint name.
+// Only maxNumberOfEndpoints Metrics are stored, all other endpoint names are mapped
+// to a generic endpoint name "other".
+type MetricsByEndpoint struct {
+	metricsFactory    metrics.Factory
+	endpoints         *normalizedEndpoints
+	metricsByEndpoint map[string]*Metrics
+	mux               sync.RWMutex
+}
+
+func newMetricsByEndpoint(
+	metricsFactory metrics.Factory,
+	normalizer NameNormalizer,
+	maxNumberOfEndpoints int,
+) *MetricsByEndpoint {
+	return &MetricsByEndpoint{
+		metricsFactory:    metricsFactory,
+		endpoints:         newNormalizedEndpoints(maxNumberOfEndpoints, normalizer),
+		metricsByEndpoint: make(map[string]*Metrics, maxNumberOfEndpoints+1), // +1 for "other"
+	}
+}
+
+func (m *MetricsByEndpoint) get(endpoint string) *Metrics {
+	safeName := m.endpoints.normalize(endpoint)
+	if safeName == "" {
+		safeName = otherEndpointsPlaceholder
+	}
+	m.mux.RLock()
+	met := m.metricsByEndpoint[safeName]
+	m.mux.RUnlock()
+	if met != nil {
+		return met
+	}
+
+	return m.getWithWriteLock(safeName)
+}
+
+// split to make easier to test
+func (m *MetricsByEndpoint) getWithWriteLock(safeName string) *Metrics {
+	m.mux.Lock()
+	defer m.mux.Unlock()
+
+	// it is possible that the name has been already registered after we released
+	// the read lock and before we grabbed the write lock, so check for that.
+	if met, ok := m.metricsByEndpoint[safeName]; ok {
+		return met
+	}
+
+	// it would be nice to create the struct before locking, since Init() is somewhat
+	// expensive, however some metrics backends (e.g. expvar) may not like duplicate metrics.
+	met := &Metrics{}
+	tags := map[string]string{endpointNameMetricTag: safeName}
+	metrics.Init(met, m.metricsFactory, tags)
+
+	m.metricsByEndpoint[safeName] = met
+	return met
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/rpcmetrics/normalizer.go b/vendor/github.com/uber/jaeger-client-go/rpcmetrics/normalizer.go
new file mode 100644
index 000000000..148d84b3a
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/rpcmetrics/normalizer.go
@@ -0,0 +1,101 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package rpcmetrics
+
+// NameNormalizer is used to convert the endpoint names to strings
+// that can be safely used as tags in the metrics.
+type NameNormalizer interface {
+	Normalize(name string) string
+}
+
+// DefaultNameNormalizer converts endpoint names so that they contain only characters
+// from the safe charset [a-zA-Z0-9-./_]. All other characters are replaced with '-'.
+var DefaultNameNormalizer = &SimpleNameNormalizer{
+	SafeSets: []SafeCharacterSet{
+		&Range{From: 'a', To: 'z'},
+		&Range{From: 'A', To: 'Z'},
+		&Range{From: '0', To: '9'},
+		&Char{'-'},
+		&Char{'_'},
+		&Char{'/'},
+		&Char{'.'},
+	},
+	Replacement: '-',
+}
+
+// SimpleNameNormalizer uses a set of safe character sets.
+type SimpleNameNormalizer struct {
+	SafeSets    []SafeCharacterSet
+	Replacement byte
+}
+
+// SafeCharacterSet determines if the given character is "safe"
+type SafeCharacterSet interface {
+	IsSafe(c byte) bool
+}
+
+// Range implements SafeCharacterSet
+type Range struct {
+	From, To byte
+}
+
+// IsSafe implements SafeCharacterSet
+func (r *Range) IsSafe(c byte) bool {
+	return c >= r.From && c <= r.To
+}
+
+// Char implements SafeCharacterSet
+type Char struct {
+	Val byte
+}
+
+// IsSafe implements SafeCharacterSet
+func (ch *Char) IsSafe(c byte) bool {
+	return c == ch.Val
+}
+
+// Normalize checks each character in the string against SafeSets,
+// and if it's not safe substitutes it with Replacement.
+func (n *SimpleNameNormalizer) Normalize(name string) string {
+	var retMe []byte
+	nameBytes := []byte(name)
+	for i, b := range nameBytes {
+		if n.safeByte(b) {
+			if retMe != nil {
+				retMe[i] = b
+			}
+		} else {
+			if retMe == nil {
+				retMe = make([]byte, len(nameBytes))
+				copy(retMe[0:i], nameBytes[0:i])
+			}
+			retMe[i] = n.Replacement
+		}
+	}
+	if retMe == nil {
+		return name
+	}
+	return string(retMe)
+}
+
+// safeByte checks if b against all safe charsets.
+func (n *SimpleNameNormalizer) safeByte(b byte) bool {
+	for i := range n.SafeSets {
+		if n.SafeSets[i].IsSafe(b) {
+			return true
+		}
+	}
+	return false
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/rpcmetrics/observer.go b/vendor/github.com/uber/jaeger-client-go/rpcmetrics/observer.go
new file mode 100644
index 000000000..eca5ff6f3
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/rpcmetrics/observer.go
@@ -0,0 +1,171 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package rpcmetrics
+
+import (
+	"strconv"
+	"sync"
+	"time"
+
+	"github.com/opentracing/opentracing-go"
+	"github.com/opentracing/opentracing-go/ext"
+	"github.com/uber/jaeger-lib/metrics"
+
+	jaeger "github.com/uber/jaeger-client-go"
+)
+
+const defaultMaxNumberOfEndpoints = 200
+
+// Observer is an observer that can emit RPC metrics.
+type Observer struct {
+	metricsByEndpoint *MetricsByEndpoint
+}
+
+// NewObserver creates a new observer that can emit RPC metrics.
+func NewObserver(metricsFactory metrics.Factory, normalizer NameNormalizer) *Observer {
+	return &Observer{
+		metricsByEndpoint: newMetricsByEndpoint(
+			metricsFactory,
+			normalizer,
+			defaultMaxNumberOfEndpoints,
+		),
+	}
+}
+
+// OnStartSpan creates a new Observer for the span.
+func (o *Observer) OnStartSpan(
+	operationName string,
+	options opentracing.StartSpanOptions,
+) jaeger.SpanObserver {
+	return NewSpanObserver(o.metricsByEndpoint, operationName, options)
+}
+
+// SpanKind identifies the span as inboud, outbound, or internal
+type SpanKind int
+
+const (
+	// Local span kind
+	Local SpanKind = iota
+	// Inbound span kind
+	Inbound
+	// Outbound span kind
+	Outbound
+)
+
+// SpanObserver collects RPC metrics
+type SpanObserver struct {
+	metricsByEndpoint *MetricsByEndpoint
+	operationName     string
+	startTime         time.Time
+	mux               sync.Mutex
+	kind              SpanKind
+	httpStatusCode    uint16
+	err               bool
+}
+
+// NewSpanObserver creates a new SpanObserver that can emit RPC metrics.
+func NewSpanObserver(
+	metricsByEndpoint *MetricsByEndpoint,
+	operationName string,
+	options opentracing.StartSpanOptions,
+) *SpanObserver {
+	so := &SpanObserver{
+		metricsByEndpoint: metricsByEndpoint,
+		operationName:     operationName,
+		startTime:         options.StartTime,
+	}
+	for k, v := range options.Tags {
+		so.handleTagInLock(k, v)
+	}
+	return so
+}
+
+// handleTags watches for special tags
+// - SpanKind
+// - HttpStatusCode
+// - Error
+func (so *SpanObserver) handleTagInLock(key string, value interface{}) {
+	if key == string(ext.SpanKind) {
+		if v, ok := value.(ext.SpanKindEnum); ok {
+			value = string(v)
+		}
+		if v, ok := value.(string); ok {
+			if v == string(ext.SpanKindRPCClientEnum) {
+				so.kind = Outbound
+			} else if v == string(ext.SpanKindRPCServerEnum) {
+				so.kind = Inbound
+			}
+		}
+		return
+	}
+	if key == string(ext.HTTPStatusCode) {
+		if v, ok := value.(uint16); ok {
+			so.httpStatusCode = v
+		} else if v, ok := value.(int); ok {
+			so.httpStatusCode = uint16(v)
+		} else if v, ok := value.(string); ok {
+			if vv, err := strconv.Atoi(v); err == nil {
+				so.httpStatusCode = uint16(vv)
+			}
+		}
+		return
+	}
+	if key == string(ext.Error) {
+		if v, ok := value.(bool); ok {
+			so.err = v
+		} else if v, ok := value.(string); ok {
+			if vv, err := strconv.ParseBool(v); err == nil {
+				so.err = vv
+			}
+		}
+		return
+	}
+}
+
+// OnFinish emits the RPC metrics. It only has an effect when operation name
+// is not blank, and the span kind is an RPC server.
+func (so *SpanObserver) OnFinish(options opentracing.FinishOptions) {
+	so.mux.Lock()
+	defer so.mux.Unlock()
+
+	if so.operationName == "" || so.kind != Inbound {
+		return
+	}
+
+	mets := so.metricsByEndpoint.get(so.operationName)
+	latency := options.FinishTime.Sub(so.startTime)
+	if so.err {
+		mets.RequestCountFailures.Inc(1)
+		mets.RequestLatencyFailures.Record(latency)
+	} else {
+		mets.RequestCountSuccess.Inc(1)
+		mets.RequestLatencySuccess.Record(latency)
+	}
+	mets.recordHTTPStatusCode(so.httpStatusCode)
+}
+
+// OnSetOperationName records new operation name.
+func (so *SpanObserver) OnSetOperationName(operationName string) {
+	so.mux.Lock()
+	so.operationName = operationName
+	so.mux.Unlock()
+}
+
+// OnSetTag implements SpanObserver
+func (so *SpanObserver) OnSetTag(key string, value interface{}) {
+	so.mux.Lock()
+	so.handleTagInLock(key, value)
+	so.mux.Unlock()
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/sampler.go b/vendor/github.com/uber/jaeger-client-go/sampler.go
new file mode 100644
index 000000000..e6a32b383
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/sampler.go
@@ -0,0 +1,556 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"fmt"
+	"math"
+	"net/url"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	"github.com/uber/jaeger-client-go/log"
+	"github.com/uber/jaeger-client-go/thrift-gen/sampling"
+	"github.com/uber/jaeger-client-go/utils"
+)
+
+const (
+	defaultSamplingServerURL       = "http://localhost:5778/sampling"
+	defaultSamplingRefreshInterval = time.Minute
+	defaultMaxOperations           = 2000
+)
+
+// Sampler decides whether a new trace should be sampled or not.
+type Sampler interface {
+	// IsSampled decides whether a trace with given `id` and `operation`
+	// should be sampled. This function will also return the tags that
+	// can be used to identify the type of sampling that was applied to
+	// the root span. Most simple samplers would return two tags,
+	// sampler.type and sampler.param, similar to those used in the Configuration
+	IsSampled(id TraceID, operation string) (sampled bool, tags []Tag)
+
+	// Close does a clean shutdown of the sampler, stopping any background
+	// go-routines it may have started.
+	Close()
+
+	// Equal checks if the `other` sampler is functionally equivalent
+	// to this sampler.
+	// TODO remove this function. This function is used to determine if 2 samplers are equivalent
+	// which does not bode well with the adaptive sampler which has to create all the composite samplers
+	// for the comparison to occur. This is expensive to do if only one sampler has changed.
+	Equal(other Sampler) bool
+}
+
+// -----------------------
+
+// ConstSampler is a sampler that always makes the same decision.
+type ConstSampler struct {
+	Decision bool
+	tags     []Tag
+}
+
+// NewConstSampler creates a ConstSampler.
+func NewConstSampler(sample bool) Sampler {
+	tags := []Tag{
+		{key: SamplerTypeTagKey, value: SamplerTypeConst},
+		{key: SamplerParamTagKey, value: sample},
+	}
+	return &ConstSampler{Decision: sample, tags: tags}
+}
+
+// IsSampled implements IsSampled() of Sampler.
+func (s *ConstSampler) IsSampled(id TraceID, operation string) (bool, []Tag) {
+	return s.Decision, s.tags
+}
+
+// Close implements Close() of Sampler.
+func (s *ConstSampler) Close() {
+	// nothing to do
+}
+
+// Equal implements Equal() of Sampler.
+func (s *ConstSampler) Equal(other Sampler) bool {
+	if o, ok := other.(*ConstSampler); ok {
+		return s.Decision == o.Decision
+	}
+	return false
+}
+
+// -----------------------
+
+// ProbabilisticSampler is a sampler that randomly samples a certain percentage
+// of traces.
+type ProbabilisticSampler struct {
+	samplingRate     float64
+	samplingBoundary uint64
+	tags             []Tag
+}
+
+const maxRandomNumber = ^(uint64(1) << 63) // i.e. 0x7fffffffffffffff
+
+// NewProbabilisticSampler creates a sampler that randomly samples a certain percentage of traces specified by the
+// samplingRate, in the range between 0.0 and 1.0.
+//
+// It relies on the fact that new trace IDs are 63bit random numbers themselves, thus making the sampling decision
+// without generating a new random number, but simply calculating if traceID < (samplingRate * 2^63).
+// TODO remove the error from this function for next major release
+func NewProbabilisticSampler(samplingRate float64) (*ProbabilisticSampler, error) {
+	if samplingRate < 0.0 || samplingRate > 1.0 {
+		return nil, fmt.Errorf("Sampling Rate must be between 0.0 and 1.0, received %f", samplingRate)
+	}
+	return newProbabilisticSampler(samplingRate), nil
+}
+
+func newProbabilisticSampler(samplingRate float64) *ProbabilisticSampler {
+	samplingRate = math.Max(0.0, math.Min(samplingRate, 1.0))
+	tags := []Tag{
+		{key: SamplerTypeTagKey, value: SamplerTypeProbabilistic},
+		{key: SamplerParamTagKey, value: samplingRate},
+	}
+	return &ProbabilisticSampler{
+		samplingRate:     samplingRate,
+		samplingBoundary: uint64(float64(maxRandomNumber) * samplingRate),
+		tags:             tags,
+	}
+}
+
+// SamplingRate returns the sampling probability this sampled was constructed with.
+func (s *ProbabilisticSampler) SamplingRate() float64 {
+	return s.samplingRate
+}
+
+// IsSampled implements IsSampled() of Sampler.
+func (s *ProbabilisticSampler) IsSampled(id TraceID, operation string) (bool, []Tag) {
+	return s.samplingBoundary >= id.Low, s.tags
+}
+
+// Close implements Close() of Sampler.
+func (s *ProbabilisticSampler) Close() {
+	// nothing to do
+}
+
+// Equal implements Equal() of Sampler.
+func (s *ProbabilisticSampler) Equal(other Sampler) bool {
+	if o, ok := other.(*ProbabilisticSampler); ok {
+		return s.samplingBoundary == o.samplingBoundary
+	}
+	return false
+}
+
+// -----------------------
+
+type rateLimitingSampler struct {
+	maxTracesPerSecond float64
+	rateLimiter        utils.RateLimiter
+	tags               []Tag
+}
+
+// NewRateLimitingSampler creates a sampler that samples at most maxTracesPerSecond. The distribution of sampled
+// traces follows burstiness of the service, i.e. a service with uniformly distributed requests will have those
+// requests sampled uniformly as well, but if requests are bursty, especially sub-second, then a number of
+// sequential requests can be sampled each second.
+func NewRateLimitingSampler(maxTracesPerSecond float64) Sampler {
+	tags := []Tag{
+		{key: SamplerTypeTagKey, value: SamplerTypeRateLimiting},
+		{key: SamplerParamTagKey, value: maxTracesPerSecond},
+	}
+	return &rateLimitingSampler{
+		maxTracesPerSecond: maxTracesPerSecond,
+		rateLimiter:        utils.NewRateLimiter(maxTracesPerSecond, math.Max(maxTracesPerSecond, 1.0)),
+		tags:               tags,
+	}
+}
+
+// IsSampled implements IsSampled() of Sampler.
+func (s *rateLimitingSampler) IsSampled(id TraceID, operation string) (bool, []Tag) {
+	return s.rateLimiter.CheckCredit(1.0), s.tags
+}
+
+func (s *rateLimitingSampler) Close() {
+	// nothing to do
+}
+
+func (s *rateLimitingSampler) Equal(other Sampler) bool {
+	if o, ok := other.(*rateLimitingSampler); ok {
+		return s.maxTracesPerSecond == o.maxTracesPerSecond
+	}
+	return false
+}
+
+// -----------------------
+
+// GuaranteedThroughputProbabilisticSampler is a sampler that leverages both probabilisticSampler and
+// rateLimitingSampler. The rateLimitingSampler is used as a guaranteed lower bound sampler such that
+// every operation is sampled at least once in a time interval defined by the lowerBound. ie a lowerBound
+// of 1.0 / (60 * 10) will sample an operation at least once every 10 minutes.
+//
+// The probabilisticSampler is given higher priority when tags are emitted, ie. if IsSampled() for both
+// samplers return true, the tags for probabilisticSampler will be used.
+type GuaranteedThroughputProbabilisticSampler struct {
+	probabilisticSampler *ProbabilisticSampler
+	lowerBoundSampler    Sampler
+	tags                 []Tag
+	samplingRate         float64
+	lowerBound           float64
+}
+
+// NewGuaranteedThroughputProbabilisticSampler returns a delegating sampler that applies both
+// probabilisticSampler and rateLimitingSampler.
+func NewGuaranteedThroughputProbabilisticSampler(
+	lowerBound, samplingRate float64,
+) (*GuaranteedThroughputProbabilisticSampler, error) {
+	return newGuaranteedThroughputProbabilisticSampler(lowerBound, samplingRate), nil
+}
+
+func newGuaranteedThroughputProbabilisticSampler(lowerBound, samplingRate float64) *GuaranteedThroughputProbabilisticSampler {
+	s := &GuaranteedThroughputProbabilisticSampler{
+		lowerBoundSampler: NewRateLimitingSampler(lowerBound),
+		lowerBound:        lowerBound,
+	}
+	s.setProbabilisticSampler(samplingRate)
+	return s
+}
+
+func (s *GuaranteedThroughputProbabilisticSampler) setProbabilisticSampler(samplingRate float64) {
+	if s.probabilisticSampler == nil || s.samplingRate != samplingRate {
+		s.probabilisticSampler = newProbabilisticSampler(samplingRate)
+		s.samplingRate = s.probabilisticSampler.SamplingRate()
+		s.tags = []Tag{
+			{key: SamplerTypeTagKey, value: SamplerTypeLowerBound},
+			{key: SamplerParamTagKey, value: s.samplingRate},
+		}
+	}
+}
+
+// IsSampled implements IsSampled() of Sampler.
+func (s *GuaranteedThroughputProbabilisticSampler) IsSampled(id TraceID, operation string) (bool, []Tag) {
+	if sampled, tags := s.probabilisticSampler.IsSampled(id, operation); sampled {
+		s.lowerBoundSampler.IsSampled(id, operation)
+		return true, tags
+	}
+	sampled, _ := s.lowerBoundSampler.IsSampled(id, operation)
+	return sampled, s.tags
+}
+
+// Close implements Close() of Sampler.
+func (s *GuaranteedThroughputProbabilisticSampler) Close() {
+	s.probabilisticSampler.Close()
+	s.lowerBoundSampler.Close()
+}
+
+// Equal implements Equal() of Sampler.
+func (s *GuaranteedThroughputProbabilisticSampler) Equal(other Sampler) bool {
+	// NB The Equal() function is expensive and will be removed. See adaptiveSampler.Equal() for
+	// more information.
+	return false
+}
+
+// this function should only be called while holding a Write lock
+func (s *GuaranteedThroughputProbabilisticSampler) update(lowerBound, samplingRate float64) {
+	s.setProbabilisticSampler(samplingRate)
+	if s.lowerBound != lowerBound {
+		s.lowerBoundSampler = NewRateLimitingSampler(lowerBound)
+		s.lowerBound = lowerBound
+	}
+}
+
+// -----------------------
+
+type adaptiveSampler struct {
+	sync.RWMutex
+
+	samplers       map[string]*GuaranteedThroughputProbabilisticSampler
+	defaultSampler *ProbabilisticSampler
+	lowerBound     float64
+	maxOperations  int
+}
+
+// NewAdaptiveSampler returns a delegating sampler that applies both probabilisticSampler and
+// rateLimitingSampler via the guaranteedThroughputProbabilisticSampler. This sampler keeps track of all
+// operations and delegates calls to the respective guaranteedThroughputProbabilisticSampler.
+func NewAdaptiveSampler(strategies *sampling.PerOperationSamplingStrategies, maxOperations int) (Sampler, error) {
+	return newAdaptiveSampler(strategies, maxOperations), nil
+}
+
+func newAdaptiveSampler(strategies *sampling.PerOperationSamplingStrategies, maxOperations int) Sampler {
+	samplers := make(map[string]*GuaranteedThroughputProbabilisticSampler)
+	for _, strategy := range strategies.PerOperationStrategies {
+		sampler := newGuaranteedThroughputProbabilisticSampler(
+			strategies.DefaultLowerBoundTracesPerSecond,
+			strategy.ProbabilisticSampling.SamplingRate,
+		)
+		samplers[strategy.Operation] = sampler
+	}
+	return &adaptiveSampler{
+		samplers:       samplers,
+		defaultSampler: newProbabilisticSampler(strategies.DefaultSamplingProbability),
+		lowerBound:     strategies.DefaultLowerBoundTracesPerSecond,
+		maxOperations:  maxOperations,
+	}
+}
+
+func (s *adaptiveSampler) IsSampled(id TraceID, operation string) (bool, []Tag) {
+	s.RLock()
+	sampler, ok := s.samplers[operation]
+	if ok {
+		defer s.RUnlock()
+		return sampler.IsSampled(id, operation)
+	}
+	s.RUnlock()
+	s.Lock()
+	defer s.Unlock()
+
+	// Check if sampler has already been created
+	sampler, ok = s.samplers[operation]
+	if ok {
+		return sampler.IsSampled(id, operation)
+	}
+	// Store only up to maxOperations of unique ops.
+	if len(s.samplers) >= s.maxOperations {
+		return s.defaultSampler.IsSampled(id, operation)
+	}
+	newSampler := newGuaranteedThroughputProbabilisticSampler(s.lowerBound, s.defaultSampler.SamplingRate())
+	s.samplers[operation] = newSampler
+	return newSampler.IsSampled(id, operation)
+}
+
+func (s *adaptiveSampler) Close() {
+	s.Lock()
+	defer s.Unlock()
+	for _, sampler := range s.samplers {
+		sampler.Close()
+	}
+	s.defaultSampler.Close()
+}
+
+func (s *adaptiveSampler) Equal(other Sampler) bool {
+	// NB The Equal() function is overly expensive for adaptiveSampler since it's composed of multiple
+	// samplers which all need to be initialized before this function can be called for a comparison.
+	// Therefore, adaptiveSampler uses the update() function to only alter the samplers that need
+	// changing. Hence this function always returns false so that the update function can be called.
+	// Once the Equal() function is removed from the Sampler API, this will no longer be needed.
+	return false
+}
+
+func (s *adaptiveSampler) update(strategies *sampling.PerOperationSamplingStrategies) {
+	s.Lock()
+	defer s.Unlock()
+	for _, strategy := range strategies.PerOperationStrategies {
+		operation := strategy.Operation
+		samplingRate := strategy.ProbabilisticSampling.SamplingRate
+		lowerBound := strategies.DefaultLowerBoundTracesPerSecond
+		if sampler, ok := s.samplers[operation]; ok {
+			sampler.update(lowerBound, samplingRate)
+		} else {
+			sampler := newGuaranteedThroughputProbabilisticSampler(
+				lowerBound,
+				samplingRate,
+			)
+			s.samplers[operation] = sampler
+		}
+	}
+	s.lowerBound = strategies.DefaultLowerBoundTracesPerSecond
+	if s.defaultSampler.SamplingRate() != strategies.DefaultSamplingProbability {
+		s.defaultSampler = newProbabilisticSampler(strategies.DefaultSamplingProbability)
+	}
+}
+
+// -----------------------
+
+// RemotelyControlledSampler is a delegating sampler that polls a remote server
+// for the appropriate sampling strategy, constructs a corresponding sampler and
+// delegates to it for sampling decisions.
+type RemotelyControlledSampler struct {
+	// These fields must be first in the struct because `sync/atomic` expects 64-bit alignment.
+	// Cf. https://github.com/uber/jaeger-client-go/issues/155, https://goo.gl/zW7dgq
+	closed int64 // 0 - not closed, 1 - closed
+
+	sync.RWMutex
+	samplerOptions
+
+	serviceName string
+	manager     sampling.SamplingManager
+	doneChan    chan *sync.WaitGroup
+}
+
+type httpSamplingManager struct {
+	serverURL string
+}
+
+func (s *httpSamplingManager) GetSamplingStrategy(serviceName string) (*sampling.SamplingStrategyResponse, error) {
+	var out sampling.SamplingStrategyResponse
+	v := url.Values{}
+	v.Set("service", serviceName)
+	if err := utils.GetJSON(s.serverURL+"?"+v.Encode(), &out); err != nil {
+		return nil, err
+	}
+	return &out, nil
+}
+
+// NewRemotelyControlledSampler creates a sampler that periodically pulls
+// the sampling strategy from an HTTP sampling server (e.g. jaeger-agent).
+func NewRemotelyControlledSampler(
+	serviceName string,
+	opts ...SamplerOption,
+) *RemotelyControlledSampler {
+	options := applySamplerOptions(opts...)
+	sampler := &RemotelyControlledSampler{
+		samplerOptions: options,
+		serviceName:    serviceName,
+		manager:        &httpSamplingManager{serverURL: options.samplingServerURL},
+		doneChan:       make(chan *sync.WaitGroup),
+	}
+	go sampler.pollController()
+	return sampler
+}
+
+func applySamplerOptions(opts ...SamplerOption) samplerOptions {
+	options := samplerOptions{}
+	for _, option := range opts {
+		option(&options)
+	}
+	if options.sampler == nil {
+		options.sampler = newProbabilisticSampler(0.001)
+	}
+	if options.logger == nil {
+		options.logger = log.NullLogger
+	}
+	if options.maxOperations <= 0 {
+		options.maxOperations = defaultMaxOperations
+	}
+	if options.samplingServerURL == "" {
+		options.samplingServerURL = defaultSamplingServerURL
+	}
+	if options.metrics == nil {
+		options.metrics = NewNullMetrics()
+	}
+	if options.samplingRefreshInterval <= 0 {
+		options.samplingRefreshInterval = defaultSamplingRefreshInterval
+	}
+	return options
+}
+
+// IsSampled implements IsSampled() of Sampler.
+func (s *RemotelyControlledSampler) IsSampled(id TraceID, operation string) (bool, []Tag) {
+	s.RLock()
+	defer s.RUnlock()
+	return s.sampler.IsSampled(id, operation)
+}
+
+// Close implements Close() of Sampler.
+func (s *RemotelyControlledSampler) Close() {
+	if swapped := atomic.CompareAndSwapInt64(&s.closed, 0, 1); !swapped {
+		s.logger.Error("Repeated attempt to close the sampler is ignored")
+		return
+	}
+
+	var wg sync.WaitGroup
+	wg.Add(1)
+	s.doneChan <- &wg
+	wg.Wait()
+}
+
+// Equal implements Equal() of Sampler.
+func (s *RemotelyControlledSampler) Equal(other Sampler) bool {
+	// NB The Equal() function is expensive and will be removed. See adaptiveSampler.Equal() for
+	// more information.
+	if o, ok := other.(*RemotelyControlledSampler); ok {
+		s.RLock()
+		o.RLock()
+		defer s.RUnlock()
+		defer o.RUnlock()
+		return s.sampler.Equal(o.sampler)
+	}
+	return false
+}
+
+func (s *RemotelyControlledSampler) pollController() {
+	ticker := time.NewTicker(s.samplingRefreshInterval)
+	defer ticker.Stop()
+	s.pollControllerWithTicker(ticker)
+}
+
+func (s *RemotelyControlledSampler) pollControllerWithTicker(ticker *time.Ticker) {
+	for {
+		select {
+		case <-ticker.C:
+			s.updateSampler()
+		case wg := <-s.doneChan:
+			wg.Done()
+			return
+		}
+	}
+}
+
+func (s *RemotelyControlledSampler) getSampler() Sampler {
+	s.Lock()
+	defer s.Unlock()
+	return s.sampler
+}
+
+func (s *RemotelyControlledSampler) setSampler(sampler Sampler) {
+	s.Lock()
+	defer s.Unlock()
+	s.sampler = sampler
+}
+
+func (s *RemotelyControlledSampler) updateSampler() {
+	res, err := s.manager.GetSamplingStrategy(s.serviceName)
+	if err != nil {
+		s.metrics.SamplerQueryFailure.Inc(1)
+		return
+	}
+	s.Lock()
+	defer s.Unlock()
+
+	s.metrics.SamplerRetrieved.Inc(1)
+	if strategies := res.GetOperationSampling(); strategies != nil {
+		s.updateAdaptiveSampler(strategies)
+	} else {
+		err = s.updateRateLimitingOrProbabilisticSampler(res)
+	}
+	if err != nil {
+		s.metrics.SamplerUpdateFailure.Inc(1)
+		s.logger.Infof("Unable to handle sampling strategy response %+v. Got error: %v", res, err)
+		return
+	}
+	s.metrics.SamplerUpdated.Inc(1)
+}
+
+// NB: this function should only be called while holding a Write lock
+func (s *RemotelyControlledSampler) updateAdaptiveSampler(strategies *sampling.PerOperationSamplingStrategies) {
+	if adaptiveSampler, ok := s.sampler.(*adaptiveSampler); ok {
+		adaptiveSampler.update(strategies)
+	} else {
+		s.sampler = newAdaptiveSampler(strategies, s.maxOperations)
+	}
+}
+
+// NB: this function should only be called while holding a Write lock
+func (s *RemotelyControlledSampler) updateRateLimitingOrProbabilisticSampler(res *sampling.SamplingStrategyResponse) error {
+	var newSampler Sampler
+	if probabilistic := res.GetProbabilisticSampling(); probabilistic != nil {
+		newSampler = newProbabilisticSampler(probabilistic.SamplingRate)
+	} else if rateLimiting := res.GetRateLimitingSampling(); rateLimiting != nil {
+		newSampler = NewRateLimitingSampler(float64(rateLimiting.MaxTracesPerSecond))
+	} else {
+		return fmt.Errorf("Unsupported sampling strategy type %v", res.GetStrategyType())
+	}
+	if !s.sampler.Equal(newSampler) {
+		s.sampler = newSampler
+	}
+	return nil
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/sampler_options.go b/vendor/github.com/uber/jaeger-client-go/sampler_options.go
new file mode 100644
index 000000000..75d28a561
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/sampler_options.go
@@ -0,0 +1,81 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"time"
+)
+
+// SamplerOption is a function that sets some option on the sampler
+type SamplerOption func(options *samplerOptions)
+
+// SamplerOptions is a factory for all available SamplerOption's
+var SamplerOptions samplerOptions
+
+type samplerOptions struct {
+	metrics                 *Metrics
+	maxOperations           int
+	sampler                 Sampler
+	logger                  Logger
+	samplingServerURL       string
+	samplingRefreshInterval time.Duration
+}
+
+// Metrics creates a SamplerOption that initializes Metrics on the sampler,
+// which is used to emit statistics.
+func (samplerOptions) Metrics(m *Metrics) SamplerOption {
+	return func(o *samplerOptions) {
+		o.metrics = m
+	}
+}
+
+// MaxOperations creates a SamplerOption that sets the maximum number of
+// operations the sampler will keep track of.
+func (samplerOptions) MaxOperations(maxOperations int) SamplerOption {
+	return func(o *samplerOptions) {
+		o.maxOperations = maxOperations
+	}
+}
+
+// InitialSampler creates a SamplerOption that sets the initial sampler
+// to use before a remote sampler is created and used.
+func (samplerOptions) InitialSampler(sampler Sampler) SamplerOption {
+	return func(o *samplerOptions) {
+		o.sampler = sampler
+	}
+}
+
+// Logger creates a SamplerOption that sets the logger used by the sampler.
+func (samplerOptions) Logger(logger Logger) SamplerOption {
+	return func(o *samplerOptions) {
+		o.logger = logger
+	}
+}
+
+// SamplingServerURL creates a SamplerOption that sets the sampling server url
+// of the local agent that contains the sampling strategies.
+func (samplerOptions) SamplingServerURL(samplingServerURL string) SamplerOption {
+	return func(o *samplerOptions) {
+		o.samplingServerURL = samplingServerURL
+	}
+}
+
+// SamplingRefreshInterval creates a SamplerOption that sets how often the
+// sampler will poll local agent for the appropriate sampling strategy.
+func (samplerOptions) SamplingRefreshInterval(samplingRefreshInterval time.Duration) SamplerOption {
+	return func(o *samplerOptions) {
+		o.samplingRefreshInterval = samplingRefreshInterval
+	}
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/span.go b/vendor/github.com/uber/jaeger-client-go/span.go
new file mode 100644
index 000000000..f0b497a90
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/span.go
@@ -0,0 +1,249 @@
+// Copyright (c) 2017-2018 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"sync"
+	"time"
+
+	"github.com/opentracing/opentracing-go"
+	"github.com/opentracing/opentracing-go/ext"
+	"github.com/opentracing/opentracing-go/log"
+)
+
+// Span implements opentracing.Span
+type Span struct {
+	sync.RWMutex
+
+	tracer *Tracer
+
+	context SpanContext
+
+	// The name of the "operation" this span is an instance of.
+	// Known as a "span name" in some implementations.
+	operationName string
+
+	// firstInProcess, if true, indicates that this span is the root of the (sub)tree
+	// of spans in the current process. In other words it's true for the root spans,
+	// and the ingress spans when the process joins another trace.
+	firstInProcess bool
+
+	// startTime is the timestamp indicating when the span began, with microseconds precision.
+	startTime time.Time
+
+	// duration returns duration of the span with microseconds precision.
+	// Zero value means duration is unknown.
+	duration time.Duration
+
+	// tags attached to this span
+	tags []Tag
+
+	// The span's "micro-log"
+	logs []opentracing.LogRecord
+
+	// references for this span
+	references []Reference
+
+	observer ContribSpanObserver
+}
+
+// Tag is a simple key value wrapper.
+// TODO deprecate in the next major release, use opentracing.Tag instead.
+type Tag struct {
+	key   string
+	value interface{}
+}
+
+// SetOperationName sets or changes the operation name.
+func (s *Span) SetOperationName(operationName string) opentracing.Span {
+	s.Lock()
+	defer s.Unlock()
+	if s.context.IsSampled() {
+		s.operationName = operationName
+	}
+	s.observer.OnSetOperationName(operationName)
+	return s
+}
+
+// SetTag implements SetTag() of opentracing.Span
+func (s *Span) SetTag(key string, value interface{}) opentracing.Span {
+	s.observer.OnSetTag(key, value)
+	if key == string(ext.SamplingPriority) && !setSamplingPriority(s, value) {
+		return s
+	}
+	s.Lock()
+	defer s.Unlock()
+	if s.context.IsSampled() {
+		s.setTagNoLocking(key, value)
+	}
+	return s
+}
+
+func (s *Span) setTagNoLocking(key string, value interface{}) {
+	s.tags = append(s.tags, Tag{key: key, value: value})
+}
+
+// LogFields implements opentracing.Span API
+func (s *Span) LogFields(fields ...log.Field) {
+	s.Lock()
+	defer s.Unlock()
+	if !s.context.IsSampled() {
+		return
+	}
+	s.logFieldsNoLocking(fields...)
+}
+
+// this function should only be called while holding a Write lock
+func (s *Span) logFieldsNoLocking(fields ...log.Field) {
+	lr := opentracing.LogRecord{
+		Fields:    fields,
+		Timestamp: time.Now(),
+	}
+	s.appendLog(lr)
+}
+
+// LogKV implements opentracing.Span API
+func (s *Span) LogKV(alternatingKeyValues ...interface{}) {
+	s.RLock()
+	sampled := s.context.IsSampled()
+	s.RUnlock()
+	if !sampled {
+		return
+	}
+	fields, err := log.InterleavedKVToFields(alternatingKeyValues...)
+	if err != nil {
+		s.LogFields(log.Error(err), log.String("function", "LogKV"))
+		return
+	}
+	s.LogFields(fields...)
+}
+
+// LogEvent implements opentracing.Span API
+func (s *Span) LogEvent(event string) {
+	s.Log(opentracing.LogData{Event: event})
+}
+
+// LogEventWithPayload implements opentracing.Span API
+func (s *Span) LogEventWithPayload(event string, payload interface{}) {
+	s.Log(opentracing.LogData{Event: event, Payload: payload})
+}
+
+// Log implements opentracing.Span API
+func (s *Span) Log(ld opentracing.LogData) {
+	s.Lock()
+	defer s.Unlock()
+	if s.context.IsSampled() {
+		if ld.Timestamp.IsZero() {
+			ld.Timestamp = s.tracer.timeNow()
+		}
+		s.appendLog(ld.ToLogRecord())
+	}
+}
+
+// this function should only be called while holding a Write lock
+func (s *Span) appendLog(lr opentracing.LogRecord) {
+	// TODO add logic to limit number of logs per span (issue #46)
+	s.logs = append(s.logs, lr)
+}
+
+// SetBaggageItem implements SetBaggageItem() of opentracing.SpanContext
+func (s *Span) SetBaggageItem(key, value string) opentracing.Span {
+	s.Lock()
+	defer s.Unlock()
+	s.tracer.setBaggage(s, key, value)
+	return s
+}
+
+// BaggageItem implements BaggageItem() of opentracing.SpanContext
+func (s *Span) BaggageItem(key string) string {
+	s.RLock()
+	defer s.RUnlock()
+	return s.context.baggage[key]
+}
+
+// Finish implements opentracing.Span API
+func (s *Span) Finish() {
+	s.FinishWithOptions(opentracing.FinishOptions{})
+}
+
+// FinishWithOptions implements opentracing.Span API
+func (s *Span) FinishWithOptions(options opentracing.FinishOptions) {
+	if options.FinishTime.IsZero() {
+		options.FinishTime = s.tracer.timeNow()
+	}
+	s.observer.OnFinish(options)
+	s.Lock()
+	if s.context.IsSampled() {
+		s.duration = options.FinishTime.Sub(s.startTime)
+		// Note: bulk logs are not subject to maxLogsPerSpan limit
+		if options.LogRecords != nil {
+			s.logs = append(s.logs, options.LogRecords...)
+		}
+		for _, ld := range options.BulkLogData {
+			s.logs = append(s.logs, ld.ToLogRecord())
+		}
+	}
+	s.Unlock()
+	// call reportSpan even for non-sampled traces, to return span to the pool
+	s.tracer.reportSpan(s)
+}
+
+// Context implements opentracing.Span API
+func (s *Span) Context() opentracing.SpanContext {
+	s.Lock()
+	defer s.Unlock()
+	return s.context
+}
+
+// Tracer implements opentracing.Span API
+func (s *Span) Tracer() opentracing.Tracer {
+	return s.tracer
+}
+
+func (s *Span) String() string {
+	s.RLock()
+	defer s.RUnlock()
+	return s.context.String()
+}
+
+// OperationName allows retrieving current operation name.
+func (s *Span) OperationName() string {
+	s.RLock()
+	defer s.RUnlock()
+	return s.operationName
+}
+
+func (s *Span) serviceName() string {
+	return s.tracer.serviceName
+}
+
+// setSamplingPriority returns true if the flag was updated successfully, false otherwise.
+func setSamplingPriority(s *Span, value interface{}) bool {
+	s.Lock()
+	defer s.Unlock()
+	val, ok := value.(uint16)
+	if !ok {
+		return false
+	}
+	if val == 0 {
+		s.context.flags = s.context.flags & (^flagSampled)
+		return true
+	}
+	if s.tracer.isDebugAllowed(s.operationName) {
+		s.context.flags = s.context.flags | flagDebug | flagSampled
+		return true
+	}
+	return false
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift-gen/agent/agent.go b/vendor/github.com/uber/jaeger-client-go/thrift-gen/agent/agent.go
new file mode 100644
index 000000000..e48811c50
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift-gen/agent/agent.go
@@ -0,0 +1,411 @@
+// Autogenerated by Thrift Compiler (0.9.3)
+// DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
+
+package agent
+
+import (
+	"bytes"
+	"fmt"
+	"github.com/uber/jaeger-client-go/thrift"
+	"github.com/uber/jaeger-client-go/thrift-gen/jaeger"
+	"github.com/uber/jaeger-client-go/thrift-gen/zipkincore"
+)
+
+// (needed to ensure safety because of naive import list construction.)
+var _ = thrift.ZERO
+var _ = fmt.Printf
+var _ = bytes.Equal
+
+var _ = jaeger.GoUnusedProtection__
+var _ = zipkincore.GoUnusedProtection__
+
+type Agent interface {
+	// Parameters:
+	//  - Spans
+	EmitZipkinBatch(spans []*zipkincore.Span) (err error)
+	// Parameters:
+	//  - Batch
+	EmitBatch(batch *jaeger.Batch) (err error)
+}
+
+type AgentClient struct {
+	Transport       thrift.TTransport
+	ProtocolFactory thrift.TProtocolFactory
+	InputProtocol   thrift.TProtocol
+	OutputProtocol  thrift.TProtocol
+	SeqId           int32
+}
+
+func NewAgentClientFactory(t thrift.TTransport, f thrift.TProtocolFactory) *AgentClient {
+	return &AgentClient{Transport: t,
+		ProtocolFactory: f,
+		InputProtocol:   f.GetProtocol(t),
+		OutputProtocol:  f.GetProtocol(t),
+		SeqId:           0,
+	}
+}
+
+func NewAgentClientProtocol(t thrift.TTransport, iprot thrift.TProtocol, oprot thrift.TProtocol) *AgentClient {
+	return &AgentClient{Transport: t,
+		ProtocolFactory: nil,
+		InputProtocol:   iprot,
+		OutputProtocol:  oprot,
+		SeqId:           0,
+	}
+}
+
+// Parameters:
+//  - Spans
+func (p *AgentClient) EmitZipkinBatch(spans []*zipkincore.Span) (err error) {
+	if err = p.sendEmitZipkinBatch(spans); err != nil {
+		return
+	}
+	return
+}
+
+func (p *AgentClient) sendEmitZipkinBatch(spans []*zipkincore.Span) (err error) {
+	oprot := p.OutputProtocol
+	if oprot == nil {
+		oprot = p.ProtocolFactory.GetProtocol(p.Transport)
+		p.OutputProtocol = oprot
+	}
+	p.SeqId++
+	if err = oprot.WriteMessageBegin("emitZipkinBatch", thrift.ONEWAY, p.SeqId); err != nil {
+		return
+	}
+	args := AgentEmitZipkinBatchArgs{
+		Spans: spans,
+	}
+	if err = args.Write(oprot); err != nil {
+		return
+	}
+	if err = oprot.WriteMessageEnd(); err != nil {
+		return
+	}
+	return oprot.Flush()
+}
+
+// Parameters:
+//  - Batch
+func (p *AgentClient) EmitBatch(batch *jaeger.Batch) (err error) {
+	if err = p.sendEmitBatch(batch); err != nil {
+		return
+	}
+	return
+}
+
+func (p *AgentClient) sendEmitBatch(batch *jaeger.Batch) (err error) {
+	oprot := p.OutputProtocol
+	if oprot == nil {
+		oprot = p.ProtocolFactory.GetProtocol(p.Transport)
+		p.OutputProtocol = oprot
+	}
+	p.SeqId++
+	if err = oprot.WriteMessageBegin("emitBatch", thrift.ONEWAY, p.SeqId); err != nil {
+		return
+	}
+	args := AgentEmitBatchArgs{
+		Batch: batch,
+	}
+	if err = args.Write(oprot); err != nil {
+		return
+	}
+	if err = oprot.WriteMessageEnd(); err != nil {
+		return
+	}
+	return oprot.Flush()
+}
+
+type AgentProcessor struct {
+	processorMap map[string]thrift.TProcessorFunction
+	handler      Agent
+}
+
+func (p *AgentProcessor) AddToProcessorMap(key string, processor thrift.TProcessorFunction) {
+	p.processorMap[key] = processor
+}
+
+func (p *AgentProcessor) GetProcessorFunction(key string) (processor thrift.TProcessorFunction, ok bool) {
+	processor, ok = p.processorMap[key]
+	return processor, ok
+}
+
+func (p *AgentProcessor) ProcessorMap() map[string]thrift.TProcessorFunction {
+	return p.processorMap
+}
+
+func NewAgentProcessor(handler Agent) *AgentProcessor {
+
+	self0 := &AgentProcessor{handler: handler, processorMap: make(map[string]thrift.TProcessorFunction)}
+	self0.processorMap["emitZipkinBatch"] = &agentProcessorEmitZipkinBatch{handler: handler}
+	self0.processorMap["emitBatch"] = &agentProcessorEmitBatch{handler: handler}
+	return self0
+}
+
+func (p *AgentProcessor) Process(iprot, oprot thrift.TProtocol) (success bool, err thrift.TException) {
+	name, _, seqId, err := iprot.ReadMessageBegin()
+	if err != nil {
+		return false, err
+	}
+	if processor, ok := p.GetProcessorFunction(name); ok {
+		return processor.Process(seqId, iprot, oprot)
+	}
+	iprot.Skip(thrift.STRUCT)
+	iprot.ReadMessageEnd()
+	x1 := thrift.NewTApplicationException(thrift.UNKNOWN_METHOD, "Unknown function "+name)
+	oprot.WriteMessageBegin(name, thrift.EXCEPTION, seqId)
+	x1.Write(oprot)
+	oprot.WriteMessageEnd()
+	oprot.Flush()
+	return false, x1
+
+}
+
+type agentProcessorEmitZipkinBatch struct {
+	handler Agent
+}
+
+func (p *agentProcessorEmitZipkinBatch) Process(seqId int32, iprot, oprot thrift.TProtocol) (success bool, err thrift.TException) {
+	args := AgentEmitZipkinBatchArgs{}
+	if err = args.Read(iprot); err != nil {
+		iprot.ReadMessageEnd()
+		return false, err
+	}
+
+	iprot.ReadMessageEnd()
+	var err2 error
+	if err2 = p.handler.EmitZipkinBatch(args.Spans); err2 != nil {
+		return true, err2
+	}
+	return true, nil
+}
+
+type agentProcessorEmitBatch struct {
+	handler Agent
+}
+
+func (p *agentProcessorEmitBatch) Process(seqId int32, iprot, oprot thrift.TProtocol) (success bool, err thrift.TException) {
+	args := AgentEmitBatchArgs{}
+	if err = args.Read(iprot); err != nil {
+		iprot.ReadMessageEnd()
+		return false, err
+	}
+
+	iprot.ReadMessageEnd()
+	var err2 error
+	if err2 = p.handler.EmitBatch(args.Batch); err2 != nil {
+		return true, err2
+	}
+	return true, nil
+}
+
+// HELPER FUNCTIONS AND STRUCTURES
+
+// Attributes:
+//  - Spans
+type AgentEmitZipkinBatchArgs struct {
+	Spans []*zipkincore.Span `thrift:"spans,1" json:"spans"`
+}
+
+func NewAgentEmitZipkinBatchArgs() *AgentEmitZipkinBatchArgs {
+	return &AgentEmitZipkinBatchArgs{}
+}
+
+func (p *AgentEmitZipkinBatchArgs) GetSpans() []*zipkincore.Span {
+	return p.Spans
+}
+func (p *AgentEmitZipkinBatchArgs) Read(iprot thrift.TProtocol) error {
+	if _, err := iprot.ReadStructBegin(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+	}
+
+	for {
+		_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
+		if err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+		}
+		if fieldTypeId == thrift.STOP {
+			break
+		}
+		switch fieldId {
+		case 1:
+			if err := p.readField1(iprot); err != nil {
+				return err
+			}
+		default:
+			if err := iprot.Skip(fieldTypeId); err != nil {
+				return err
+			}
+		}
+		if err := iprot.ReadFieldEnd(); err != nil {
+			return err
+		}
+	}
+	if err := iprot.ReadStructEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+	}
+	return nil
+}
+
+func (p *AgentEmitZipkinBatchArgs) readField1(iprot thrift.TProtocol) error {
+	_, size, err := iprot.ReadListBegin()
+	if err != nil {
+		return thrift.PrependError("error reading list begin: ", err)
+	}
+	tSlice := make([]*zipkincore.Span, 0, size)
+	p.Spans = tSlice
+	for i := 0; i < size; i++ {
+		_elem2 := &zipkincore.Span{}
+		if err := _elem2.Read(iprot); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", _elem2), err)
+		}
+		p.Spans = append(p.Spans, _elem2)
+	}
+	if err := iprot.ReadListEnd(); err != nil {
+		return thrift.PrependError("error reading list end: ", err)
+	}
+	return nil
+}
+
+func (p *AgentEmitZipkinBatchArgs) Write(oprot thrift.TProtocol) error {
+	if err := oprot.WriteStructBegin("emitZipkinBatch_args"); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
+	}
+	if err := p.writeField1(oprot); err != nil {
+		return err
+	}
+	if err := oprot.WriteFieldStop(); err != nil {
+		return thrift.PrependError("write field stop error: ", err)
+	}
+	if err := oprot.WriteStructEnd(); err != nil {
+		return thrift.PrependError("write struct stop error: ", err)
+	}
+	return nil
+}
+
+func (p *AgentEmitZipkinBatchArgs) writeField1(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("spans", thrift.LIST, 1); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:spans: ", p), err)
+	}
+	if err := oprot.WriteListBegin(thrift.STRUCT, len(p.Spans)); err != nil {
+		return thrift.PrependError("error writing list begin: ", err)
+	}
+	for _, v := range p.Spans {
+		if err := v.Write(oprot); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", v), err)
+		}
+	}
+	if err := oprot.WriteListEnd(); err != nil {
+		return thrift.PrependError("error writing list end: ", err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 1:spans: ", p), err)
+	}
+	return err
+}
+
+func (p *AgentEmitZipkinBatchArgs) String() string {
+	if p == nil {
+		return "<nil>"
+	}
+	return fmt.Sprintf("AgentEmitZipkinBatchArgs(%+v)", *p)
+}
+
+// Attributes:
+//  - Batch
+type AgentEmitBatchArgs struct {
+	Batch *jaeger.Batch `thrift:"batch,1" json:"batch"`
+}
+
+func NewAgentEmitBatchArgs() *AgentEmitBatchArgs {
+	return &AgentEmitBatchArgs{}
+}
+
+var AgentEmitBatchArgs_Batch_DEFAULT *jaeger.Batch
+
+func (p *AgentEmitBatchArgs) GetBatch() *jaeger.Batch {
+	if !p.IsSetBatch() {
+		return AgentEmitBatchArgs_Batch_DEFAULT
+	}
+	return p.Batch
+}
+func (p *AgentEmitBatchArgs) IsSetBatch() bool {
+	return p.Batch != nil
+}
+
+func (p *AgentEmitBatchArgs) Read(iprot thrift.TProtocol) error {
+	if _, err := iprot.ReadStructBegin(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+	}
+
+	for {
+		_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
+		if err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+		}
+		if fieldTypeId == thrift.STOP {
+			break
+		}
+		switch fieldId {
+		case 1:
+			if err := p.readField1(iprot); err != nil {
+				return err
+			}
+		default:
+			if err := iprot.Skip(fieldTypeId); err != nil {
+				return err
+			}
+		}
+		if err := iprot.ReadFieldEnd(); err != nil {
+			return err
+		}
+	}
+	if err := iprot.ReadStructEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+	}
+	return nil
+}
+
+func (p *AgentEmitBatchArgs) readField1(iprot thrift.TProtocol) error {
+	p.Batch = &jaeger.Batch{}
+	if err := p.Batch.Read(iprot); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", p.Batch), err)
+	}
+	return nil
+}
+
+func (p *AgentEmitBatchArgs) Write(oprot thrift.TProtocol) error {
+	if err := oprot.WriteStructBegin("emitBatch_args"); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
+	}
+	if err := p.writeField1(oprot); err != nil {
+		return err
+	}
+	if err := oprot.WriteFieldStop(); err != nil {
+		return thrift.PrependError("write field stop error: ", err)
+	}
+	if err := oprot.WriteStructEnd(); err != nil {
+		return thrift.PrependError("write struct stop error: ", err)
+	}
+	return nil
+}
+
+func (p *AgentEmitBatchArgs) writeField1(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("batch", thrift.STRUCT, 1); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:batch: ", p), err)
+	}
+	if err := p.Batch.Write(oprot); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", p.Batch), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 1:batch: ", p), err)
+	}
+	return err
+}
+
+func (p *AgentEmitBatchArgs) String() string {
+	if p == nil {
+		return "<nil>"
+	}
+	return fmt.Sprintf("AgentEmitBatchArgs(%+v)", *p)
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift-gen/agent/constants.go b/vendor/github.com/uber/jaeger-client-go/thrift-gen/agent/constants.go
new file mode 100644
index 000000000..aa9857bb8
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift-gen/agent/constants.go
@@ -0,0 +1,23 @@
+// Autogenerated by Thrift Compiler (0.9.3)
+// DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
+
+package agent
+
+import (
+	"bytes"
+	"fmt"
+	"github.com/uber/jaeger-client-go/thrift"
+	"github.com/uber/jaeger-client-go/thrift-gen/jaeger"
+	"github.com/uber/jaeger-client-go/thrift-gen/zipkincore"
+)
+
+// (needed to ensure safety because of naive import list construction.)
+var _ = thrift.ZERO
+var _ = fmt.Printf
+var _ = bytes.Equal
+
+var _ = jaeger.GoUnusedProtection__
+var _ = zipkincore.GoUnusedProtection__
+
+func init() {
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift-gen/agent/ttypes.go b/vendor/github.com/uber/jaeger-client-go/thrift-gen/agent/ttypes.go
new file mode 100644
index 000000000..9c28f11c1
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift-gen/agent/ttypes.go
@@ -0,0 +1,21 @@
+// Autogenerated by Thrift Compiler (0.9.3)
+// DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
+
+package agent
+
+import (
+	"bytes"
+	"fmt"
+	"github.com/uber/jaeger-client-go/thrift"
+	"github.com/uber/jaeger-client-go/thrift-gen/jaeger"
+	"github.com/uber/jaeger-client-go/thrift-gen/zipkincore"
+)
+
+// (needed to ensure safety because of naive import list construction.)
+var _ = thrift.ZERO
+var _ = fmt.Printf
+var _ = bytes.Equal
+
+var _ = jaeger.GoUnusedProtection__
+var _ = zipkincore.GoUnusedProtection__
+var GoUnusedProtection__ int
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift-gen/baggage/baggagerestrictionmanager.go b/vendor/github.com/uber/jaeger-client-go/thrift-gen/baggage/baggagerestrictionmanager.go
new file mode 100644
index 000000000..1f79c1255
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift-gen/baggage/baggagerestrictionmanager.go
@@ -0,0 +1,435 @@
+// Autogenerated by Thrift Compiler (0.9.3)
+// DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
+
+package baggage
+
+import (
+	"bytes"
+	"fmt"
+	"github.com/uber/jaeger-client-go/thrift"
+)
+
+// (needed to ensure safety because of naive import list construction.)
+var _ = thrift.ZERO
+var _ = fmt.Printf
+var _ = bytes.Equal
+
+type BaggageRestrictionManager interface {
+	// getBaggageRestrictions retrieves the baggage restrictions for a specific service.
+	// Usually, baggageRestrictions apply to all services however there may be situations
+	// where a baggageKey might only be allowed to be set by a specific service.
+	//
+	// Parameters:
+	//  - ServiceName
+	GetBaggageRestrictions(serviceName string) (r []*BaggageRestriction, err error)
+}
+
+type BaggageRestrictionManagerClient struct {
+	Transport       thrift.TTransport
+	ProtocolFactory thrift.TProtocolFactory
+	InputProtocol   thrift.TProtocol
+	OutputProtocol  thrift.TProtocol
+	SeqId           int32
+}
+
+func NewBaggageRestrictionManagerClientFactory(t thrift.TTransport, f thrift.TProtocolFactory) *BaggageRestrictionManagerClient {
+	return &BaggageRestrictionManagerClient{Transport: t,
+		ProtocolFactory: f,
+		InputProtocol:   f.GetProtocol(t),
+		OutputProtocol:  f.GetProtocol(t),
+		SeqId:           0,
+	}
+}
+
+func NewBaggageRestrictionManagerClientProtocol(t thrift.TTransport, iprot thrift.TProtocol, oprot thrift.TProtocol) *BaggageRestrictionManagerClient {
+	return &BaggageRestrictionManagerClient{Transport: t,
+		ProtocolFactory: nil,
+		InputProtocol:   iprot,
+		OutputProtocol:  oprot,
+		SeqId:           0,
+	}
+}
+
+// getBaggageRestrictions retrieves the baggage restrictions for a specific service.
+// Usually, baggageRestrictions apply to all services however there may be situations
+// where a baggageKey might only be allowed to be set by a specific service.
+//
+// Parameters:
+//  - ServiceName
+func (p *BaggageRestrictionManagerClient) GetBaggageRestrictions(serviceName string) (r []*BaggageRestriction, err error) {
+	if err = p.sendGetBaggageRestrictions(serviceName); err != nil {
+		return
+	}
+	return p.recvGetBaggageRestrictions()
+}
+
+func (p *BaggageRestrictionManagerClient) sendGetBaggageRestrictions(serviceName string) (err error) {
+	oprot := p.OutputProtocol
+	if oprot == nil {
+		oprot = p.ProtocolFactory.GetProtocol(p.Transport)
+		p.OutputProtocol = oprot
+	}
+	p.SeqId++
+	if err = oprot.WriteMessageBegin("getBaggageRestrictions", thrift.CALL, p.SeqId); err != nil {
+		return
+	}
+	args := BaggageRestrictionManagerGetBaggageRestrictionsArgs{
+		ServiceName: serviceName,
+	}
+	if err = args.Write(oprot); err != nil {
+		return
+	}
+	if err = oprot.WriteMessageEnd(); err != nil {
+		return
+	}
+	return oprot.Flush()
+}
+
+func (p *BaggageRestrictionManagerClient) recvGetBaggageRestrictions() (value []*BaggageRestriction, err error) {
+	iprot := p.InputProtocol
+	if iprot == nil {
+		iprot = p.ProtocolFactory.GetProtocol(p.Transport)
+		p.InputProtocol = iprot
+	}
+	method, mTypeId, seqId, err := iprot.ReadMessageBegin()
+	if err != nil {
+		return
+	}
+	if method != "getBaggageRestrictions" {
+		err = thrift.NewTApplicationException(thrift.WRONG_METHOD_NAME, "getBaggageRestrictions failed: wrong method name")
+		return
+	}
+	if p.SeqId != seqId {
+		err = thrift.NewTApplicationException(thrift.BAD_SEQUENCE_ID, "getBaggageRestrictions failed: out of sequence response")
+		return
+	}
+	if mTypeId == thrift.EXCEPTION {
+		error0 := thrift.NewTApplicationException(thrift.UNKNOWN_APPLICATION_EXCEPTION, "Unknown Exception")
+		var error1 error
+		error1, err = error0.Read(iprot)
+		if err != nil {
+			return
+		}
+		if err = iprot.ReadMessageEnd(); err != nil {
+			return
+		}
+		err = error1
+		return
+	}
+	if mTypeId != thrift.REPLY {
+		err = thrift.NewTApplicationException(thrift.INVALID_MESSAGE_TYPE_EXCEPTION, "getBaggageRestrictions failed: invalid message type")
+		return
+	}
+	result := BaggageRestrictionManagerGetBaggageRestrictionsResult{}
+	if err = result.Read(iprot); err != nil {
+		return
+	}
+	if err = iprot.ReadMessageEnd(); err != nil {
+		return
+	}
+	value = result.GetSuccess()
+	return
+}
+
+type BaggageRestrictionManagerProcessor struct {
+	processorMap map[string]thrift.TProcessorFunction
+	handler      BaggageRestrictionManager
+}
+
+func (p *BaggageRestrictionManagerProcessor) AddToProcessorMap(key string, processor thrift.TProcessorFunction) {
+	p.processorMap[key] = processor
+}
+
+func (p *BaggageRestrictionManagerProcessor) GetProcessorFunction(key string) (processor thrift.TProcessorFunction, ok bool) {
+	processor, ok = p.processorMap[key]
+	return processor, ok
+}
+
+func (p *BaggageRestrictionManagerProcessor) ProcessorMap() map[string]thrift.TProcessorFunction {
+	return p.processorMap
+}
+
+func NewBaggageRestrictionManagerProcessor(handler BaggageRestrictionManager) *BaggageRestrictionManagerProcessor {
+
+	self2 := &BaggageRestrictionManagerProcessor{handler: handler, processorMap: make(map[string]thrift.TProcessorFunction)}
+	self2.processorMap["getBaggageRestrictions"] = &baggageRestrictionManagerProcessorGetBaggageRestrictions{handler: handler}
+	return self2
+}
+
+func (p *BaggageRestrictionManagerProcessor) Process(iprot, oprot thrift.TProtocol) (success bool, err thrift.TException) {
+	name, _, seqId, err := iprot.ReadMessageBegin()
+	if err != nil {
+		return false, err
+	}
+	if processor, ok := p.GetProcessorFunction(name); ok {
+		return processor.Process(seqId, iprot, oprot)
+	}
+	iprot.Skip(thrift.STRUCT)
+	iprot.ReadMessageEnd()
+	x3 := thrift.NewTApplicationException(thrift.UNKNOWN_METHOD, "Unknown function "+name)
+	oprot.WriteMessageBegin(name, thrift.EXCEPTION, seqId)
+	x3.Write(oprot)
+	oprot.WriteMessageEnd()
+	oprot.Flush()
+	return false, x3
+
+}
+
+type baggageRestrictionManagerProcessorGetBaggageRestrictions struct {
+	handler BaggageRestrictionManager
+}
+
+func (p *baggageRestrictionManagerProcessorGetBaggageRestrictions) Process(seqId int32, iprot, oprot thrift.TProtocol) (success bool, err thrift.TException) {
+	args := BaggageRestrictionManagerGetBaggageRestrictionsArgs{}
+	if err = args.Read(iprot); err != nil {
+		iprot.ReadMessageEnd()
+		x := thrift.NewTApplicationException(thrift.PROTOCOL_ERROR, err.Error())
+		oprot.WriteMessageBegin("getBaggageRestrictions", thrift.EXCEPTION, seqId)
+		x.Write(oprot)
+		oprot.WriteMessageEnd()
+		oprot.Flush()
+		return false, err
+	}
+
+	iprot.ReadMessageEnd()
+	result := BaggageRestrictionManagerGetBaggageRestrictionsResult{}
+	var retval []*BaggageRestriction
+	var err2 error
+	if retval, err2 = p.handler.GetBaggageRestrictions(args.ServiceName); err2 != nil {
+		x := thrift.NewTApplicationException(thrift.INTERNAL_ERROR, "Internal error processing getBaggageRestrictions: "+err2.Error())
+		oprot.WriteMessageBegin("getBaggageRestrictions", thrift.EXCEPTION, seqId)
+		x.Write(oprot)
+		oprot.WriteMessageEnd()
+		oprot.Flush()
+		return true, err2
+	} else {
+		result.Success = retval
+	}
+	if err2 = oprot.WriteMessageBegin("getBaggageRestrictions", thrift.REPLY, seqId); err2 != nil {
+		err = err2
+	}
+	if err2 = result.Write(oprot); err == nil && err2 != nil {
+		err = err2
+	}
+	if err2 = oprot.WriteMessageEnd(); err == nil && err2 != nil {
+		err = err2
+	}
+	if err2 = oprot.Flush(); err == nil && err2 != nil {
+		err = err2
+	}
+	if err != nil {
+		return
+	}
+	return true, err
+}
+
+// HELPER FUNCTIONS AND STRUCTURES
+
+// Attributes:
+//  - ServiceName
+type BaggageRestrictionManagerGetBaggageRestrictionsArgs struct {
+	ServiceName string `thrift:"serviceName,1" json:"serviceName"`
+}
+
+func NewBaggageRestrictionManagerGetBaggageRestrictionsArgs() *BaggageRestrictionManagerGetBaggageRestrictionsArgs {
+	return &BaggageRestrictionManagerGetBaggageRestrictionsArgs{}
+}
+
+func (p *BaggageRestrictionManagerGetBaggageRestrictionsArgs) GetServiceName() string {
+	return p.ServiceName
+}
+func (p *BaggageRestrictionManagerGetBaggageRestrictionsArgs) Read(iprot thrift.TProtocol) error {
+	if _, err := iprot.ReadStructBegin(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+	}
+
+	for {
+		_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
+		if err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+		}
+		if fieldTypeId == thrift.STOP {
+			break
+		}
+		switch fieldId {
+		case 1:
+			if err := p.readField1(iprot); err != nil {
+				return err
+			}
+		default:
+			if err := iprot.Skip(fieldTypeId); err != nil {
+				return err
+			}
+		}
+		if err := iprot.ReadFieldEnd(); err != nil {
+			return err
+		}
+	}
+	if err := iprot.ReadStructEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+	}
+	return nil
+}
+
+func (p *BaggageRestrictionManagerGetBaggageRestrictionsArgs) readField1(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadString(); err != nil {
+		return thrift.PrependError("error reading field 1: ", err)
+	} else {
+		p.ServiceName = v
+	}
+	return nil
+}
+
+func (p *BaggageRestrictionManagerGetBaggageRestrictionsArgs) Write(oprot thrift.TProtocol) error {
+	if err := oprot.WriteStructBegin("getBaggageRestrictions_args"); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
+	}
+	if err := p.writeField1(oprot); err != nil {
+		return err
+	}
+	if err := oprot.WriteFieldStop(); err != nil {
+		return thrift.PrependError("write field stop error: ", err)
+	}
+	if err := oprot.WriteStructEnd(); err != nil {
+		return thrift.PrependError("write struct stop error: ", err)
+	}
+	return nil
+}
+
+func (p *BaggageRestrictionManagerGetBaggageRestrictionsArgs) writeField1(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("serviceName", thrift.STRING, 1); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:serviceName: ", p), err)
+	}
+	if err := oprot.WriteString(string(p.ServiceName)); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.serviceName (1) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 1:serviceName: ", p), err)
+	}
+	return err
+}
+
+func (p *BaggageRestrictionManagerGetBaggageRestrictionsArgs) String() string {
+	if p == nil {
+		return "<nil>"
+	}
+	return fmt.Sprintf("BaggageRestrictionManagerGetBaggageRestrictionsArgs(%+v)", *p)
+}
+
+// Attributes:
+//  - Success
+type BaggageRestrictionManagerGetBaggageRestrictionsResult struct {
+	Success []*BaggageRestriction `thrift:"success,0" json:"success,omitempty"`
+}
+
+func NewBaggageRestrictionManagerGetBaggageRestrictionsResult() *BaggageRestrictionManagerGetBaggageRestrictionsResult {
+	return &BaggageRestrictionManagerGetBaggageRestrictionsResult{}
+}
+
+var BaggageRestrictionManagerGetBaggageRestrictionsResult_Success_DEFAULT []*BaggageRestriction
+
+func (p *BaggageRestrictionManagerGetBaggageRestrictionsResult) GetSuccess() []*BaggageRestriction {
+	return p.Success
+}
+func (p *BaggageRestrictionManagerGetBaggageRestrictionsResult) IsSetSuccess() bool {
+	return p.Success != nil
+}
+
+func (p *BaggageRestrictionManagerGetBaggageRestrictionsResult) Read(iprot thrift.TProtocol) error {
+	if _, err := iprot.ReadStructBegin(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+	}
+
+	for {
+		_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
+		if err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+		}
+		if fieldTypeId == thrift.STOP {
+			break
+		}
+		switch fieldId {
+		case 0:
+			if err := p.readField0(iprot); err != nil {
+				return err
+			}
+		default:
+			if err := iprot.Skip(fieldTypeId); err != nil {
+				return err
+			}
+		}
+		if err := iprot.ReadFieldEnd(); err != nil {
+			return err
+		}
+	}
+	if err := iprot.ReadStructEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+	}
+	return nil
+}
+
+func (p *BaggageRestrictionManagerGetBaggageRestrictionsResult) readField0(iprot thrift.TProtocol) error {
+	_, size, err := iprot.ReadListBegin()
+	if err != nil {
+		return thrift.PrependError("error reading list begin: ", err)
+	}
+	tSlice := make([]*BaggageRestriction, 0, size)
+	p.Success = tSlice
+	for i := 0; i < size; i++ {
+		_elem4 := &BaggageRestriction{}
+		if err := _elem4.Read(iprot); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", _elem4), err)
+		}
+		p.Success = append(p.Success, _elem4)
+	}
+	if err := iprot.ReadListEnd(); err != nil {
+		return thrift.PrependError("error reading list end: ", err)
+	}
+	return nil
+}
+
+func (p *BaggageRestrictionManagerGetBaggageRestrictionsResult) Write(oprot thrift.TProtocol) error {
+	if err := oprot.WriteStructBegin("getBaggageRestrictions_result"); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
+	}
+	if err := p.writeField0(oprot); err != nil {
+		return err
+	}
+	if err := oprot.WriteFieldStop(); err != nil {
+		return thrift.PrependError("write field stop error: ", err)
+	}
+	if err := oprot.WriteStructEnd(); err != nil {
+		return thrift.PrependError("write struct stop error: ", err)
+	}
+	return nil
+}
+
+func (p *BaggageRestrictionManagerGetBaggageRestrictionsResult) writeField0(oprot thrift.TProtocol) (err error) {
+	if p.IsSetSuccess() {
+		if err := oprot.WriteFieldBegin("success", thrift.LIST, 0); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field begin error 0:success: ", p), err)
+		}
+		if err := oprot.WriteListBegin(thrift.STRUCT, len(p.Success)); err != nil {
+			return thrift.PrependError("error writing list begin: ", err)
+		}
+		for _, v := range p.Success {
+			if err := v.Write(oprot); err != nil {
+				return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", v), err)
+			}
+		}
+		if err := oprot.WriteListEnd(); err != nil {
+			return thrift.PrependError("error writing list end: ", err)
+		}
+		if err := oprot.WriteFieldEnd(); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field end error 0:success: ", p), err)
+		}
+	}
+	return err
+}
+
+func (p *BaggageRestrictionManagerGetBaggageRestrictionsResult) String() string {
+	if p == nil {
+		return "<nil>"
+	}
+	return fmt.Sprintf("BaggageRestrictionManagerGetBaggageRestrictionsResult(%+v)", *p)
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift-gen/baggage/constants.go b/vendor/github.com/uber/jaeger-client-go/thrift-gen/baggage/constants.go
new file mode 100644
index 000000000..ed35ce9ab
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift-gen/baggage/constants.go
@@ -0,0 +1,18 @@
+// Autogenerated by Thrift Compiler (0.9.3)
+// DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
+
+package baggage
+
+import (
+	"bytes"
+	"fmt"
+	"github.com/uber/jaeger-client-go/thrift"
+)
+
+// (needed to ensure safety because of naive import list construction.)
+var _ = thrift.ZERO
+var _ = fmt.Printf
+var _ = bytes.Equal
+
+func init() {
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift-gen/baggage/ttypes.go b/vendor/github.com/uber/jaeger-client-go/thrift-gen/baggage/ttypes.go
new file mode 100644
index 000000000..7888892f6
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift-gen/baggage/ttypes.go
@@ -0,0 +1,154 @@
+// Autogenerated by Thrift Compiler (0.9.3)
+// DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
+
+package baggage
+
+import (
+	"bytes"
+	"fmt"
+	"github.com/uber/jaeger-client-go/thrift"
+)
+
+// (needed to ensure safety because of naive import list construction.)
+var _ = thrift.ZERO
+var _ = fmt.Printf
+var _ = bytes.Equal
+
+var GoUnusedProtection__ int
+
+// Attributes:
+//  - BaggageKey
+//  - MaxValueLength
+type BaggageRestriction struct {
+	BaggageKey     string `thrift:"baggageKey,1,required" json:"baggageKey"`
+	MaxValueLength int32  `thrift:"maxValueLength,2,required" json:"maxValueLength"`
+}
+
+func NewBaggageRestriction() *BaggageRestriction {
+	return &BaggageRestriction{}
+}
+
+func (p *BaggageRestriction) GetBaggageKey() string {
+	return p.BaggageKey
+}
+
+func (p *BaggageRestriction) GetMaxValueLength() int32 {
+	return p.MaxValueLength
+}
+func (p *BaggageRestriction) Read(iprot thrift.TProtocol) error {
+	if _, err := iprot.ReadStructBegin(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+	}
+
+	var issetBaggageKey bool = false
+	var issetMaxValueLength bool = false
+
+	for {
+		_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
+		if err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+		}
+		if fieldTypeId == thrift.STOP {
+			break
+		}
+		switch fieldId {
+		case 1:
+			if err := p.readField1(iprot); err != nil {
+				return err
+			}
+			issetBaggageKey = true
+		case 2:
+			if err := p.readField2(iprot); err != nil {
+				return err
+			}
+			issetMaxValueLength = true
+		default:
+			if err := iprot.Skip(fieldTypeId); err != nil {
+				return err
+			}
+		}
+		if err := iprot.ReadFieldEnd(); err != nil {
+			return err
+		}
+	}
+	if err := iprot.ReadStructEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+	}
+	if !issetBaggageKey {
+		return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field BaggageKey is not set"))
+	}
+	if !issetMaxValueLength {
+		return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field MaxValueLength is not set"))
+	}
+	return nil
+}
+
+func (p *BaggageRestriction) readField1(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadString(); err != nil {
+		return thrift.PrependError("error reading field 1: ", err)
+	} else {
+		p.BaggageKey = v
+	}
+	return nil
+}
+
+func (p *BaggageRestriction) readField2(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadI32(); err != nil {
+		return thrift.PrependError("error reading field 2: ", err)
+	} else {
+		p.MaxValueLength = v
+	}
+	return nil
+}
+
+func (p *BaggageRestriction) Write(oprot thrift.TProtocol) error {
+	if err := oprot.WriteStructBegin("BaggageRestriction"); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
+	}
+	if err := p.writeField1(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField2(oprot); err != nil {
+		return err
+	}
+	if err := oprot.WriteFieldStop(); err != nil {
+		return thrift.PrependError("write field stop error: ", err)
+	}
+	if err := oprot.WriteStructEnd(); err != nil {
+		return thrift.PrependError("write struct stop error: ", err)
+	}
+	return nil
+}
+
+func (p *BaggageRestriction) writeField1(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("baggageKey", thrift.STRING, 1); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:baggageKey: ", p), err)
+	}
+	if err := oprot.WriteString(string(p.BaggageKey)); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.baggageKey (1) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 1:baggageKey: ", p), err)
+	}
+	return err
+}
+
+func (p *BaggageRestriction) writeField2(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("maxValueLength", thrift.I32, 2); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 2:maxValueLength: ", p), err)
+	}
+	if err := oprot.WriteI32(int32(p.MaxValueLength)); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.maxValueLength (2) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 2:maxValueLength: ", p), err)
+	}
+	return err
+}
+
+func (p *BaggageRestriction) String() string {
+	if p == nil {
+		return "<nil>"
+	}
+	return fmt.Sprintf("BaggageRestriction(%+v)", *p)
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift-gen/jaeger/agent.go b/vendor/github.com/uber/jaeger-client-go/thrift-gen/jaeger/agent.go
new file mode 100644
index 000000000..b32c37dd2
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift-gen/jaeger/agent.go
@@ -0,0 +1,242 @@
+// Autogenerated by Thrift Compiler (0.9.3)
+// DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
+
+package jaeger
+
+import (
+	"bytes"
+	"fmt"
+	"github.com/uber/jaeger-client-go/thrift"
+)
+
+// (needed to ensure safety because of naive import list construction.)
+var _ = thrift.ZERO
+var _ = fmt.Printf
+var _ = bytes.Equal
+
+type Agent interface {
+	// Parameters:
+	//  - Batch
+	EmitBatch(batch *Batch) (err error)
+}
+
+type AgentClient struct {
+	Transport       thrift.TTransport
+	ProtocolFactory thrift.TProtocolFactory
+	InputProtocol   thrift.TProtocol
+	OutputProtocol  thrift.TProtocol
+	SeqId           int32
+}
+
+func NewAgentClientFactory(t thrift.TTransport, f thrift.TProtocolFactory) *AgentClient {
+	return &AgentClient{Transport: t,
+		ProtocolFactory: f,
+		InputProtocol:   f.GetProtocol(t),
+		OutputProtocol:  f.GetProtocol(t),
+		SeqId:           0,
+	}
+}
+
+func NewAgentClientProtocol(t thrift.TTransport, iprot thrift.TProtocol, oprot thrift.TProtocol) *AgentClient {
+	return &AgentClient{Transport: t,
+		ProtocolFactory: nil,
+		InputProtocol:   iprot,
+		OutputProtocol:  oprot,
+		SeqId:           0,
+	}
+}
+
+// Parameters:
+//  - Batch
+func (p *AgentClient) EmitBatch(batch *Batch) (err error) {
+	if err = p.sendEmitBatch(batch); err != nil {
+		return
+	}
+	return
+}
+
+func (p *AgentClient) sendEmitBatch(batch *Batch) (err error) {
+	oprot := p.OutputProtocol
+	if oprot == nil {
+		oprot = p.ProtocolFactory.GetProtocol(p.Transport)
+		p.OutputProtocol = oprot
+	}
+	p.SeqId++
+	if err = oprot.WriteMessageBegin("emitBatch", thrift.ONEWAY, p.SeqId); err != nil {
+		return
+	}
+	args := AgentEmitBatchArgs{
+		Batch: batch,
+	}
+	if err = args.Write(oprot); err != nil {
+		return
+	}
+	if err = oprot.WriteMessageEnd(); err != nil {
+		return
+	}
+	return oprot.Flush()
+}
+
+type AgentProcessor struct {
+	processorMap map[string]thrift.TProcessorFunction
+	handler      Agent
+}
+
+func (p *AgentProcessor) AddToProcessorMap(key string, processor thrift.TProcessorFunction) {
+	p.processorMap[key] = processor
+}
+
+func (p *AgentProcessor) GetProcessorFunction(key string) (processor thrift.TProcessorFunction, ok bool) {
+	processor, ok = p.processorMap[key]
+	return processor, ok
+}
+
+func (p *AgentProcessor) ProcessorMap() map[string]thrift.TProcessorFunction {
+	return p.processorMap
+}
+
+func NewAgentProcessor(handler Agent) *AgentProcessor {
+
+	self6 := &AgentProcessor{handler: handler, processorMap: make(map[string]thrift.TProcessorFunction)}
+	self6.processorMap["emitBatch"] = &agentProcessorEmitBatch{handler: handler}
+	return self6
+}
+
+func (p *AgentProcessor) Process(iprot, oprot thrift.TProtocol) (success bool, err thrift.TException) {
+	name, _, seqId, err := iprot.ReadMessageBegin()
+	if err != nil {
+		return false, err
+	}
+	if processor, ok := p.GetProcessorFunction(name); ok {
+		return processor.Process(seqId, iprot, oprot)
+	}
+	iprot.Skip(thrift.STRUCT)
+	iprot.ReadMessageEnd()
+	x7 := thrift.NewTApplicationException(thrift.UNKNOWN_METHOD, "Unknown function "+name)
+	oprot.WriteMessageBegin(name, thrift.EXCEPTION, seqId)
+	x7.Write(oprot)
+	oprot.WriteMessageEnd()
+	oprot.Flush()
+	return false, x7
+
+}
+
+type agentProcessorEmitBatch struct {
+	handler Agent
+}
+
+func (p *agentProcessorEmitBatch) Process(seqId int32, iprot, oprot thrift.TProtocol) (success bool, err thrift.TException) {
+	args := AgentEmitBatchArgs{}
+	if err = args.Read(iprot); err != nil {
+		iprot.ReadMessageEnd()
+		return false, err
+	}
+
+	iprot.ReadMessageEnd()
+	var err2 error
+	if err2 = p.handler.EmitBatch(args.Batch); err2 != nil {
+		return true, err2
+	}
+	return true, nil
+}
+
+// HELPER FUNCTIONS AND STRUCTURES
+
+// Attributes:
+//  - Batch
+type AgentEmitBatchArgs struct {
+	Batch *Batch `thrift:"batch,1" json:"batch"`
+}
+
+func NewAgentEmitBatchArgs() *AgentEmitBatchArgs {
+	return &AgentEmitBatchArgs{}
+}
+
+var AgentEmitBatchArgs_Batch_DEFAULT *Batch
+
+func (p *AgentEmitBatchArgs) GetBatch() *Batch {
+	if !p.IsSetBatch() {
+		return AgentEmitBatchArgs_Batch_DEFAULT
+	}
+	return p.Batch
+}
+func (p *AgentEmitBatchArgs) IsSetBatch() bool {
+	return p.Batch != nil
+}
+
+func (p *AgentEmitBatchArgs) Read(iprot thrift.TProtocol) error {
+	if _, err := iprot.ReadStructBegin(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+	}
+
+	for {
+		_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
+		if err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+		}
+		if fieldTypeId == thrift.STOP {
+			break
+		}
+		switch fieldId {
+		case 1:
+			if err := p.readField1(iprot); err != nil {
+				return err
+			}
+		default:
+			if err := iprot.Skip(fieldTypeId); err != nil {
+				return err
+			}
+		}
+		if err := iprot.ReadFieldEnd(); err != nil {
+			return err
+		}
+	}
+	if err := iprot.ReadStructEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+	}
+	return nil
+}
+
+func (p *AgentEmitBatchArgs) readField1(iprot thrift.TProtocol) error {
+	p.Batch = &Batch{}
+	if err := p.Batch.Read(iprot); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", p.Batch), err)
+	}
+	return nil
+}
+
+func (p *AgentEmitBatchArgs) Write(oprot thrift.TProtocol) error {
+	if err := oprot.WriteStructBegin("emitBatch_args"); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
+	}
+	if err := p.writeField1(oprot); err != nil {
+		return err
+	}
+	if err := oprot.WriteFieldStop(); err != nil {
+		return thrift.PrependError("write field stop error: ", err)
+	}
+	if err := oprot.WriteStructEnd(); err != nil {
+		return thrift.PrependError("write struct stop error: ", err)
+	}
+	return nil
+}
+
+func (p *AgentEmitBatchArgs) writeField1(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("batch", thrift.STRUCT, 1); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:batch: ", p), err)
+	}
+	if err := p.Batch.Write(oprot); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", p.Batch), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 1:batch: ", p), err)
+	}
+	return err
+}
+
+func (p *AgentEmitBatchArgs) String() string {
+	if p == nil {
+		return "<nil>"
+	}
+	return fmt.Sprintf("AgentEmitBatchArgs(%+v)", *p)
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift-gen/jaeger/constants.go b/vendor/github.com/uber/jaeger-client-go/thrift-gen/jaeger/constants.go
new file mode 100644
index 000000000..621b8b1c2
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift-gen/jaeger/constants.go
@@ -0,0 +1,18 @@
+// Autogenerated by Thrift Compiler (0.9.3)
+// DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
+
+package jaeger
+
+import (
+	"bytes"
+	"fmt"
+	"github.com/uber/jaeger-client-go/thrift"
+)
+
+// (needed to ensure safety because of naive import list construction.)
+var _ = thrift.ZERO
+var _ = fmt.Printf
+var _ = bytes.Equal
+
+func init() {
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift-gen/jaeger/ttypes.go b/vendor/github.com/uber/jaeger-client-go/thrift-gen/jaeger/ttypes.go
new file mode 100644
index 000000000..d23ed2fc2
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift-gen/jaeger/ttypes.go
@@ -0,0 +1,1838 @@
+// Autogenerated by Thrift Compiler (0.9.3)
+// DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
+
+package jaeger
+
+import (
+	"bytes"
+	"fmt"
+	"github.com/uber/jaeger-client-go/thrift"
+)
+
+// (needed to ensure safety because of naive import list construction.)
+var _ = thrift.ZERO
+var _ = fmt.Printf
+var _ = bytes.Equal
+
+var GoUnusedProtection__ int
+
+type TagType int64
+
+const (
+	TagType_STRING TagType = 0
+	TagType_DOUBLE TagType = 1
+	TagType_BOOL   TagType = 2
+	TagType_LONG   TagType = 3
+	TagType_BINARY TagType = 4
+)
+
+func (p TagType) String() string {
+	switch p {
+	case TagType_STRING:
+		return "STRING"
+	case TagType_DOUBLE:
+		return "DOUBLE"
+	case TagType_BOOL:
+		return "BOOL"
+	case TagType_LONG:
+		return "LONG"
+	case TagType_BINARY:
+		return "BINARY"
+	}
+	return "<UNSET>"
+}
+
+func TagTypeFromString(s string) (TagType, error) {
+	switch s {
+	case "STRING":
+		return TagType_STRING, nil
+	case "DOUBLE":
+		return TagType_DOUBLE, nil
+	case "BOOL":
+		return TagType_BOOL, nil
+	case "LONG":
+		return TagType_LONG, nil
+	case "BINARY":
+		return TagType_BINARY, nil
+	}
+	return TagType(0), fmt.Errorf("not a valid TagType string")
+}
+
+func TagTypePtr(v TagType) *TagType { return &v }
+
+func (p TagType) MarshalText() ([]byte, error) {
+	return []byte(p.String()), nil
+}
+
+func (p *TagType) UnmarshalText(text []byte) error {
+	q, err := TagTypeFromString(string(text))
+	if err != nil {
+		return err
+	}
+	*p = q
+	return nil
+}
+
+type SpanRefType int64
+
+const (
+	SpanRefType_CHILD_OF     SpanRefType = 0
+	SpanRefType_FOLLOWS_FROM SpanRefType = 1
+)
+
+func (p SpanRefType) String() string {
+	switch p {
+	case SpanRefType_CHILD_OF:
+		return "CHILD_OF"
+	case SpanRefType_FOLLOWS_FROM:
+		return "FOLLOWS_FROM"
+	}
+	return "<UNSET>"
+}
+
+func SpanRefTypeFromString(s string) (SpanRefType, error) {
+	switch s {
+	case "CHILD_OF":
+		return SpanRefType_CHILD_OF, nil
+	case "FOLLOWS_FROM":
+		return SpanRefType_FOLLOWS_FROM, nil
+	}
+	return SpanRefType(0), fmt.Errorf("not a valid SpanRefType string")
+}
+
+func SpanRefTypePtr(v SpanRefType) *SpanRefType { return &v }
+
+func (p SpanRefType) MarshalText() ([]byte, error) {
+	return []byte(p.String()), nil
+}
+
+func (p *SpanRefType) UnmarshalText(text []byte) error {
+	q, err := SpanRefTypeFromString(string(text))
+	if err != nil {
+		return err
+	}
+	*p = q
+	return nil
+}
+
+// Attributes:
+//  - Key
+//  - VType
+//  - VStr
+//  - VDouble
+//  - VBool
+//  - VLong
+//  - VBinary
+type Tag struct {
+	Key     string   `thrift:"key,1,required" json:"key"`
+	VType   TagType  `thrift:"vType,2,required" json:"vType"`
+	VStr    *string  `thrift:"vStr,3" json:"vStr,omitempty"`
+	VDouble *float64 `thrift:"vDouble,4" json:"vDouble,omitempty"`
+	VBool   *bool    `thrift:"vBool,5" json:"vBool,omitempty"`
+	VLong   *int64   `thrift:"vLong,6" json:"vLong,omitempty"`
+	VBinary []byte   `thrift:"vBinary,7" json:"vBinary,omitempty"`
+}
+
+func NewTag() *Tag {
+	return &Tag{}
+}
+
+func (p *Tag) GetKey() string {
+	return p.Key
+}
+
+func (p *Tag) GetVType() TagType {
+	return p.VType
+}
+
+var Tag_VStr_DEFAULT string
+
+func (p *Tag) GetVStr() string {
+	if !p.IsSetVStr() {
+		return Tag_VStr_DEFAULT
+	}
+	return *p.VStr
+}
+
+var Tag_VDouble_DEFAULT float64
+
+func (p *Tag) GetVDouble() float64 {
+	if !p.IsSetVDouble() {
+		return Tag_VDouble_DEFAULT
+	}
+	return *p.VDouble
+}
+
+var Tag_VBool_DEFAULT bool
+
+func (p *Tag) GetVBool() bool {
+	if !p.IsSetVBool() {
+		return Tag_VBool_DEFAULT
+	}
+	return *p.VBool
+}
+
+var Tag_VLong_DEFAULT int64
+
+func (p *Tag) GetVLong() int64 {
+	if !p.IsSetVLong() {
+		return Tag_VLong_DEFAULT
+	}
+	return *p.VLong
+}
+
+var Tag_VBinary_DEFAULT []byte
+
+func (p *Tag) GetVBinary() []byte {
+	return p.VBinary
+}
+func (p *Tag) IsSetVStr() bool {
+	return p.VStr != nil
+}
+
+func (p *Tag) IsSetVDouble() bool {
+	return p.VDouble != nil
+}
+
+func (p *Tag) IsSetVBool() bool {
+	return p.VBool != nil
+}
+
+func (p *Tag) IsSetVLong() bool {
+	return p.VLong != nil
+}
+
+func (p *Tag) IsSetVBinary() bool {
+	return p.VBinary != nil
+}
+
+func (p *Tag) Read(iprot thrift.TProtocol) error {
+	if _, err := iprot.ReadStructBegin(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+	}
+
+	var issetKey bool = false
+	var issetVType bool = false
+
+	for {
+		_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
+		if err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+		}
+		if fieldTypeId == thrift.STOP {
+			break
+		}
+		switch fieldId {
+		case 1:
+			if err := p.readField1(iprot); err != nil {
+				return err
+			}
+			issetKey = true
+		case 2:
+			if err := p.readField2(iprot); err != nil {
+				return err
+			}
+			issetVType = true
+		case 3:
+			if err := p.readField3(iprot); err != nil {
+				return err
+			}
+		case 4:
+			if err := p.readField4(iprot); err != nil {
+				return err
+			}
+		case 5:
+			if err := p.readField5(iprot); err != nil {
+				return err
+			}
+		case 6:
+			if err := p.readField6(iprot); err != nil {
+				return err
+			}
+		case 7:
+			if err := p.readField7(iprot); err != nil {
+				return err
+			}
+		default:
+			if err := iprot.Skip(fieldTypeId); err != nil {
+				return err
+			}
+		}
+		if err := iprot.ReadFieldEnd(); err != nil {
+			return err
+		}
+	}
+	if err := iprot.ReadStructEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+	}
+	if !issetKey {
+		return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field Key is not set"))
+	}
+	if !issetVType {
+		return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field VType is not set"))
+	}
+	return nil
+}
+
+func (p *Tag) readField1(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadString(); err != nil {
+		return thrift.PrependError("error reading field 1: ", err)
+	} else {
+		p.Key = v
+	}
+	return nil
+}
+
+func (p *Tag) readField2(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadI32(); err != nil {
+		return thrift.PrependError("error reading field 2: ", err)
+	} else {
+		temp := TagType(v)
+		p.VType = temp
+	}
+	return nil
+}
+
+func (p *Tag) readField3(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadString(); err != nil {
+		return thrift.PrependError("error reading field 3: ", err)
+	} else {
+		p.VStr = &v
+	}
+	return nil
+}
+
+func (p *Tag) readField4(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadDouble(); err != nil {
+		return thrift.PrependError("error reading field 4: ", err)
+	} else {
+		p.VDouble = &v
+	}
+	return nil
+}
+
+func (p *Tag) readField5(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadBool(); err != nil {
+		return thrift.PrependError("error reading field 5: ", err)
+	} else {
+		p.VBool = &v
+	}
+	return nil
+}
+
+func (p *Tag) readField6(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadI64(); err != nil {
+		return thrift.PrependError("error reading field 6: ", err)
+	} else {
+		p.VLong = &v
+	}
+	return nil
+}
+
+func (p *Tag) readField7(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadBinary(); err != nil {
+		return thrift.PrependError("error reading field 7: ", err)
+	} else {
+		p.VBinary = v
+	}
+	return nil
+}
+
+func (p *Tag) Write(oprot thrift.TProtocol) error {
+	if err := oprot.WriteStructBegin("Tag"); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
+	}
+	if err := p.writeField1(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField2(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField3(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField4(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField5(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField6(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField7(oprot); err != nil {
+		return err
+	}
+	if err := oprot.WriteFieldStop(); err != nil {
+		return thrift.PrependError("write field stop error: ", err)
+	}
+	if err := oprot.WriteStructEnd(); err != nil {
+		return thrift.PrependError("write struct stop error: ", err)
+	}
+	return nil
+}
+
+func (p *Tag) writeField1(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("key", thrift.STRING, 1); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:key: ", p), err)
+	}
+	if err := oprot.WriteString(string(p.Key)); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.key (1) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 1:key: ", p), err)
+	}
+	return err
+}
+
+func (p *Tag) writeField2(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("vType", thrift.I32, 2); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 2:vType: ", p), err)
+	}
+	if err := oprot.WriteI32(int32(p.VType)); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.vType (2) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 2:vType: ", p), err)
+	}
+	return err
+}
+
+func (p *Tag) writeField3(oprot thrift.TProtocol) (err error) {
+	if p.IsSetVStr() {
+		if err := oprot.WriteFieldBegin("vStr", thrift.STRING, 3); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field begin error 3:vStr: ", p), err)
+		}
+		if err := oprot.WriteString(string(*p.VStr)); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T.vStr (3) field write error: ", p), err)
+		}
+		if err := oprot.WriteFieldEnd(); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field end error 3:vStr: ", p), err)
+		}
+	}
+	return err
+}
+
+func (p *Tag) writeField4(oprot thrift.TProtocol) (err error) {
+	if p.IsSetVDouble() {
+		if err := oprot.WriteFieldBegin("vDouble", thrift.DOUBLE, 4); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field begin error 4:vDouble: ", p), err)
+		}
+		if err := oprot.WriteDouble(float64(*p.VDouble)); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T.vDouble (4) field write error: ", p), err)
+		}
+		if err := oprot.WriteFieldEnd(); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field end error 4:vDouble: ", p), err)
+		}
+	}
+	return err
+}
+
+func (p *Tag) writeField5(oprot thrift.TProtocol) (err error) {
+	if p.IsSetVBool() {
+		if err := oprot.WriteFieldBegin("vBool", thrift.BOOL, 5); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field begin error 5:vBool: ", p), err)
+		}
+		if err := oprot.WriteBool(bool(*p.VBool)); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T.vBool (5) field write error: ", p), err)
+		}
+		if err := oprot.WriteFieldEnd(); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field end error 5:vBool: ", p), err)
+		}
+	}
+	return err
+}
+
+func (p *Tag) writeField6(oprot thrift.TProtocol) (err error) {
+	if p.IsSetVLong() {
+		if err := oprot.WriteFieldBegin("vLong", thrift.I64, 6); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field begin error 6:vLong: ", p), err)
+		}
+		if err := oprot.WriteI64(int64(*p.VLong)); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T.vLong (6) field write error: ", p), err)
+		}
+		if err := oprot.WriteFieldEnd(); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field end error 6:vLong: ", p), err)
+		}
+	}
+	return err
+}
+
+func (p *Tag) writeField7(oprot thrift.TProtocol) (err error) {
+	if p.IsSetVBinary() {
+		if err := oprot.WriteFieldBegin("vBinary", thrift.STRING, 7); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field begin error 7:vBinary: ", p), err)
+		}
+		if err := oprot.WriteBinary(p.VBinary); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T.vBinary (7) field write error: ", p), err)
+		}
+		if err := oprot.WriteFieldEnd(); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field end error 7:vBinary: ", p), err)
+		}
+	}
+	return err
+}
+
+func (p *Tag) String() string {
+	if p == nil {
+		return "<nil>"
+	}
+	return fmt.Sprintf("Tag(%+v)", *p)
+}
+
+// Attributes:
+//  - Timestamp
+//  - Fields
+type Log struct {
+	Timestamp int64  `thrift:"timestamp,1,required" json:"timestamp"`
+	Fields    []*Tag `thrift:"fields,2,required" json:"fields"`
+}
+
+func NewLog() *Log {
+	return &Log{}
+}
+
+func (p *Log) GetTimestamp() int64 {
+	return p.Timestamp
+}
+
+func (p *Log) GetFields() []*Tag {
+	return p.Fields
+}
+func (p *Log) Read(iprot thrift.TProtocol) error {
+	if _, err := iprot.ReadStructBegin(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+	}
+
+	var issetTimestamp bool = false
+	var issetFields bool = false
+
+	for {
+		_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
+		if err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+		}
+		if fieldTypeId == thrift.STOP {
+			break
+		}
+		switch fieldId {
+		case 1:
+			if err := p.readField1(iprot); err != nil {
+				return err
+			}
+			issetTimestamp = true
+		case 2:
+			if err := p.readField2(iprot); err != nil {
+				return err
+			}
+			issetFields = true
+		default:
+			if err := iprot.Skip(fieldTypeId); err != nil {
+				return err
+			}
+		}
+		if err := iprot.ReadFieldEnd(); err != nil {
+			return err
+		}
+	}
+	if err := iprot.ReadStructEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+	}
+	if !issetTimestamp {
+		return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field Timestamp is not set"))
+	}
+	if !issetFields {
+		return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field Fields is not set"))
+	}
+	return nil
+}
+
+func (p *Log) readField1(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadI64(); err != nil {
+		return thrift.PrependError("error reading field 1: ", err)
+	} else {
+		p.Timestamp = v
+	}
+	return nil
+}
+
+func (p *Log) readField2(iprot thrift.TProtocol) error {
+	_, size, err := iprot.ReadListBegin()
+	if err != nil {
+		return thrift.PrependError("error reading list begin: ", err)
+	}
+	tSlice := make([]*Tag, 0, size)
+	p.Fields = tSlice
+	for i := 0; i < size; i++ {
+		_elem0 := &Tag{}
+		if err := _elem0.Read(iprot); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", _elem0), err)
+		}
+		p.Fields = append(p.Fields, _elem0)
+	}
+	if err := iprot.ReadListEnd(); err != nil {
+		return thrift.PrependError("error reading list end: ", err)
+	}
+	return nil
+}
+
+func (p *Log) Write(oprot thrift.TProtocol) error {
+	if err := oprot.WriteStructBegin("Log"); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
+	}
+	if err := p.writeField1(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField2(oprot); err != nil {
+		return err
+	}
+	if err := oprot.WriteFieldStop(); err != nil {
+		return thrift.PrependError("write field stop error: ", err)
+	}
+	if err := oprot.WriteStructEnd(); err != nil {
+		return thrift.PrependError("write struct stop error: ", err)
+	}
+	return nil
+}
+
+func (p *Log) writeField1(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("timestamp", thrift.I64, 1); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:timestamp: ", p), err)
+	}
+	if err := oprot.WriteI64(int64(p.Timestamp)); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.timestamp (1) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 1:timestamp: ", p), err)
+	}
+	return err
+}
+
+func (p *Log) writeField2(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("fields", thrift.LIST, 2); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 2:fields: ", p), err)
+	}
+	if err := oprot.WriteListBegin(thrift.STRUCT, len(p.Fields)); err != nil {
+		return thrift.PrependError("error writing list begin: ", err)
+	}
+	for _, v := range p.Fields {
+		if err := v.Write(oprot); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", v), err)
+		}
+	}
+	if err := oprot.WriteListEnd(); err != nil {
+		return thrift.PrependError("error writing list end: ", err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 2:fields: ", p), err)
+	}
+	return err
+}
+
+func (p *Log) String() string {
+	if p == nil {
+		return "<nil>"
+	}
+	return fmt.Sprintf("Log(%+v)", *p)
+}
+
+// Attributes:
+//  - RefType
+//  - TraceIdLow
+//  - TraceIdHigh
+//  - SpanId
+type SpanRef struct {
+	RefType     SpanRefType `thrift:"refType,1,required" json:"refType"`
+	TraceIdLow  int64       `thrift:"traceIdLow,2,required" json:"traceIdLow"`
+	TraceIdHigh int64       `thrift:"traceIdHigh,3,required" json:"traceIdHigh"`
+	SpanId      int64       `thrift:"spanId,4,required" json:"spanId"`
+}
+
+func NewSpanRef() *SpanRef {
+	return &SpanRef{}
+}
+
+func (p *SpanRef) GetRefType() SpanRefType {
+	return p.RefType
+}
+
+func (p *SpanRef) GetTraceIdLow() int64 {
+	return p.TraceIdLow
+}
+
+func (p *SpanRef) GetTraceIdHigh() int64 {
+	return p.TraceIdHigh
+}
+
+func (p *SpanRef) GetSpanId() int64 {
+	return p.SpanId
+}
+func (p *SpanRef) Read(iprot thrift.TProtocol) error {
+	if _, err := iprot.ReadStructBegin(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+	}
+
+	var issetRefType bool = false
+	var issetTraceIdLow bool = false
+	var issetTraceIdHigh bool = false
+	var issetSpanId bool = false
+
+	for {
+		_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
+		if err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+		}
+		if fieldTypeId == thrift.STOP {
+			break
+		}
+		switch fieldId {
+		case 1:
+			if err := p.readField1(iprot); err != nil {
+				return err
+			}
+			issetRefType = true
+		case 2:
+			if err := p.readField2(iprot); err != nil {
+				return err
+			}
+			issetTraceIdLow = true
+		case 3:
+			if err := p.readField3(iprot); err != nil {
+				return err
+			}
+			issetTraceIdHigh = true
+		case 4:
+			if err := p.readField4(iprot); err != nil {
+				return err
+			}
+			issetSpanId = true
+		default:
+			if err := iprot.Skip(fieldTypeId); err != nil {
+				return err
+			}
+		}
+		if err := iprot.ReadFieldEnd(); err != nil {
+			return err
+		}
+	}
+	if err := iprot.ReadStructEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+	}
+	if !issetRefType {
+		return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field RefType is not set"))
+	}
+	if !issetTraceIdLow {
+		return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field TraceIdLow is not set"))
+	}
+	if !issetTraceIdHigh {
+		return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field TraceIdHigh is not set"))
+	}
+	if !issetSpanId {
+		return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field SpanId is not set"))
+	}
+	return nil
+}
+
+func (p *SpanRef) readField1(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadI32(); err != nil {
+		return thrift.PrependError("error reading field 1: ", err)
+	} else {
+		temp := SpanRefType(v)
+		p.RefType = temp
+	}
+	return nil
+}
+
+func (p *SpanRef) readField2(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadI64(); err != nil {
+		return thrift.PrependError("error reading field 2: ", err)
+	} else {
+		p.TraceIdLow = v
+	}
+	return nil
+}
+
+func (p *SpanRef) readField3(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadI64(); err != nil {
+		return thrift.PrependError("error reading field 3: ", err)
+	} else {
+		p.TraceIdHigh = v
+	}
+	return nil
+}
+
+func (p *SpanRef) readField4(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadI64(); err != nil {
+		return thrift.PrependError("error reading field 4: ", err)
+	} else {
+		p.SpanId = v
+	}
+	return nil
+}
+
+func (p *SpanRef) Write(oprot thrift.TProtocol) error {
+	if err := oprot.WriteStructBegin("SpanRef"); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
+	}
+	if err := p.writeField1(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField2(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField3(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField4(oprot); err != nil {
+		return err
+	}
+	if err := oprot.WriteFieldStop(); err != nil {
+		return thrift.PrependError("write field stop error: ", err)
+	}
+	if err := oprot.WriteStructEnd(); err != nil {
+		return thrift.PrependError("write struct stop error: ", err)
+	}
+	return nil
+}
+
+func (p *SpanRef) writeField1(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("refType", thrift.I32, 1); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:refType: ", p), err)
+	}
+	if err := oprot.WriteI32(int32(p.RefType)); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.refType (1) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 1:refType: ", p), err)
+	}
+	return err
+}
+
+func (p *SpanRef) writeField2(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("traceIdLow", thrift.I64, 2); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 2:traceIdLow: ", p), err)
+	}
+	if err := oprot.WriteI64(int64(p.TraceIdLow)); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.traceIdLow (2) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 2:traceIdLow: ", p), err)
+	}
+	return err
+}
+
+func (p *SpanRef) writeField3(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("traceIdHigh", thrift.I64, 3); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 3:traceIdHigh: ", p), err)
+	}
+	if err := oprot.WriteI64(int64(p.TraceIdHigh)); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.traceIdHigh (3) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 3:traceIdHigh: ", p), err)
+	}
+	return err
+}
+
+func (p *SpanRef) writeField4(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("spanId", thrift.I64, 4); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 4:spanId: ", p), err)
+	}
+	if err := oprot.WriteI64(int64(p.SpanId)); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.spanId (4) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 4:spanId: ", p), err)
+	}
+	return err
+}
+
+func (p *SpanRef) String() string {
+	if p == nil {
+		return "<nil>"
+	}
+	return fmt.Sprintf("SpanRef(%+v)", *p)
+}
+
+// Attributes:
+//  - TraceIdLow
+//  - TraceIdHigh
+//  - SpanId
+//  - ParentSpanId
+//  - OperationName
+//  - References
+//  - Flags
+//  - StartTime
+//  - Duration
+//  - Tags
+//  - Logs
+type Span struct {
+	TraceIdLow    int64      `thrift:"traceIdLow,1,required" json:"traceIdLow"`
+	TraceIdHigh   int64      `thrift:"traceIdHigh,2,required" json:"traceIdHigh"`
+	SpanId        int64      `thrift:"spanId,3,required" json:"spanId"`
+	ParentSpanId  int64      `thrift:"parentSpanId,4,required" json:"parentSpanId"`
+	OperationName string     `thrift:"operationName,5,required" json:"operationName"`
+	References    []*SpanRef `thrift:"references,6" json:"references,omitempty"`
+	Flags         int32      `thrift:"flags,7,required" json:"flags"`
+	StartTime     int64      `thrift:"startTime,8,required" json:"startTime"`
+	Duration      int64      `thrift:"duration,9,required" json:"duration"`
+	Tags          []*Tag     `thrift:"tags,10" json:"tags,omitempty"`
+	Logs          []*Log     `thrift:"logs,11" json:"logs,omitempty"`
+}
+
+func NewSpan() *Span {
+	return &Span{}
+}
+
+func (p *Span) GetTraceIdLow() int64 {
+	return p.TraceIdLow
+}
+
+func (p *Span) GetTraceIdHigh() int64 {
+	return p.TraceIdHigh
+}
+
+func (p *Span) GetSpanId() int64 {
+	return p.SpanId
+}
+
+func (p *Span) GetParentSpanId() int64 {
+	return p.ParentSpanId
+}
+
+func (p *Span) GetOperationName() string {
+	return p.OperationName
+}
+
+var Span_References_DEFAULT []*SpanRef
+
+func (p *Span) GetReferences() []*SpanRef {
+	return p.References
+}
+
+func (p *Span) GetFlags() int32 {
+	return p.Flags
+}
+
+func (p *Span) GetStartTime() int64 {
+	return p.StartTime
+}
+
+func (p *Span) GetDuration() int64 {
+	return p.Duration
+}
+
+var Span_Tags_DEFAULT []*Tag
+
+func (p *Span) GetTags() []*Tag {
+	return p.Tags
+}
+
+var Span_Logs_DEFAULT []*Log
+
+func (p *Span) GetLogs() []*Log {
+	return p.Logs
+}
+func (p *Span) IsSetReferences() bool {
+	return p.References != nil
+}
+
+func (p *Span) IsSetTags() bool {
+	return p.Tags != nil
+}
+
+func (p *Span) IsSetLogs() bool {
+	return p.Logs != nil
+}
+
+func (p *Span) Read(iprot thrift.TProtocol) error {
+	if _, err := iprot.ReadStructBegin(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+	}
+
+	var issetTraceIdLow bool = false
+	var issetTraceIdHigh bool = false
+	var issetSpanId bool = false
+	var issetParentSpanId bool = false
+	var issetOperationName bool = false
+	var issetFlags bool = false
+	var issetStartTime bool = false
+	var issetDuration bool = false
+
+	for {
+		_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
+		if err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+		}
+		if fieldTypeId == thrift.STOP {
+			break
+		}
+		switch fieldId {
+		case 1:
+			if err := p.readField1(iprot); err != nil {
+				return err
+			}
+			issetTraceIdLow = true
+		case 2:
+			if err := p.readField2(iprot); err != nil {
+				return err
+			}
+			issetTraceIdHigh = true
+		case 3:
+			if err := p.readField3(iprot); err != nil {
+				return err
+			}
+			issetSpanId = true
+		case 4:
+			if err := p.readField4(iprot); err != nil {
+				return err
+			}
+			issetParentSpanId = true
+		case 5:
+			if err := p.readField5(iprot); err != nil {
+				return err
+			}
+			issetOperationName = true
+		case 6:
+			if err := p.readField6(iprot); err != nil {
+				return err
+			}
+		case 7:
+			if err := p.readField7(iprot); err != nil {
+				return err
+			}
+			issetFlags = true
+		case 8:
+			if err := p.readField8(iprot); err != nil {
+				return err
+			}
+			issetStartTime = true
+		case 9:
+			if err := p.readField9(iprot); err != nil {
+				return err
+			}
+			issetDuration = true
+		case 10:
+			if err := p.readField10(iprot); err != nil {
+				return err
+			}
+		case 11:
+			if err := p.readField11(iprot); err != nil {
+				return err
+			}
+		default:
+			if err := iprot.Skip(fieldTypeId); err != nil {
+				return err
+			}
+		}
+		if err := iprot.ReadFieldEnd(); err != nil {
+			return err
+		}
+	}
+	if err := iprot.ReadStructEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+	}
+	if !issetTraceIdLow {
+		return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field TraceIdLow is not set"))
+	}
+	if !issetTraceIdHigh {
+		return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field TraceIdHigh is not set"))
+	}
+	if !issetSpanId {
+		return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field SpanId is not set"))
+	}
+	if !issetParentSpanId {
+		return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field ParentSpanId is not set"))
+	}
+	if !issetOperationName {
+		return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field OperationName is not set"))
+	}
+	if !issetFlags {
+		return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field Flags is not set"))
+	}
+	if !issetStartTime {
+		return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field StartTime is not set"))
+	}
+	if !issetDuration {
+		return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field Duration is not set"))
+	}
+	return nil
+}
+
+func (p *Span) readField1(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadI64(); err != nil {
+		return thrift.PrependError("error reading field 1: ", err)
+	} else {
+		p.TraceIdLow = v
+	}
+	return nil
+}
+
+func (p *Span) readField2(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadI64(); err != nil {
+		return thrift.PrependError("error reading field 2: ", err)
+	} else {
+		p.TraceIdHigh = v
+	}
+	return nil
+}
+
+func (p *Span) readField3(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadI64(); err != nil {
+		return thrift.PrependError("error reading field 3: ", err)
+	} else {
+		p.SpanId = v
+	}
+	return nil
+}
+
+func (p *Span) readField4(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadI64(); err != nil {
+		return thrift.PrependError("error reading field 4: ", err)
+	} else {
+		p.ParentSpanId = v
+	}
+	return nil
+}
+
+func (p *Span) readField5(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadString(); err != nil {
+		return thrift.PrependError("error reading field 5: ", err)
+	} else {
+		p.OperationName = v
+	}
+	return nil
+}
+
+func (p *Span) readField6(iprot thrift.TProtocol) error {
+	_, size, err := iprot.ReadListBegin()
+	if err != nil {
+		return thrift.PrependError("error reading list begin: ", err)
+	}
+	tSlice := make([]*SpanRef, 0, size)
+	p.References = tSlice
+	for i := 0; i < size; i++ {
+		_elem1 := &SpanRef{}
+		if err := _elem1.Read(iprot); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", _elem1), err)
+		}
+		p.References = append(p.References, _elem1)
+	}
+	if err := iprot.ReadListEnd(); err != nil {
+		return thrift.PrependError("error reading list end: ", err)
+	}
+	return nil
+}
+
+func (p *Span) readField7(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadI32(); err != nil {
+		return thrift.PrependError("error reading field 7: ", err)
+	} else {
+		p.Flags = v
+	}
+	return nil
+}
+
+func (p *Span) readField8(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadI64(); err != nil {
+		return thrift.PrependError("error reading field 8: ", err)
+	} else {
+		p.StartTime = v
+	}
+	return nil
+}
+
+func (p *Span) readField9(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadI64(); err != nil {
+		return thrift.PrependError("error reading field 9: ", err)
+	} else {
+		p.Duration = v
+	}
+	return nil
+}
+
+func (p *Span) readField10(iprot thrift.TProtocol) error {
+	_, size, err := iprot.ReadListBegin()
+	if err != nil {
+		return thrift.PrependError("error reading list begin: ", err)
+	}
+	tSlice := make([]*Tag, 0, size)
+	p.Tags = tSlice
+	for i := 0; i < size; i++ {
+		_elem2 := &Tag{}
+		if err := _elem2.Read(iprot); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", _elem2), err)
+		}
+		p.Tags = append(p.Tags, _elem2)
+	}
+	if err := iprot.ReadListEnd(); err != nil {
+		return thrift.PrependError("error reading list end: ", err)
+	}
+	return nil
+}
+
+func (p *Span) readField11(iprot thrift.TProtocol) error {
+	_, size, err := iprot.ReadListBegin()
+	if err != nil {
+		return thrift.PrependError("error reading list begin: ", err)
+	}
+	tSlice := make([]*Log, 0, size)
+	p.Logs = tSlice
+	for i := 0; i < size; i++ {
+		_elem3 := &Log{}
+		if err := _elem3.Read(iprot); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", _elem3), err)
+		}
+		p.Logs = append(p.Logs, _elem3)
+	}
+	if err := iprot.ReadListEnd(); err != nil {
+		return thrift.PrependError("error reading list end: ", err)
+	}
+	return nil
+}
+
+func (p *Span) Write(oprot thrift.TProtocol) error {
+	if err := oprot.WriteStructBegin("Span"); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
+	}
+	if err := p.writeField1(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField2(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField3(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField4(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField5(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField6(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField7(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField8(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField9(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField10(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField11(oprot); err != nil {
+		return err
+	}
+	if err := oprot.WriteFieldStop(); err != nil {
+		return thrift.PrependError("write field stop error: ", err)
+	}
+	if err := oprot.WriteStructEnd(); err != nil {
+		return thrift.PrependError("write struct stop error: ", err)
+	}
+	return nil
+}
+
+func (p *Span) writeField1(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("traceIdLow", thrift.I64, 1); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:traceIdLow: ", p), err)
+	}
+	if err := oprot.WriteI64(int64(p.TraceIdLow)); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.traceIdLow (1) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 1:traceIdLow: ", p), err)
+	}
+	return err
+}
+
+func (p *Span) writeField2(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("traceIdHigh", thrift.I64, 2); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 2:traceIdHigh: ", p), err)
+	}
+	if err := oprot.WriteI64(int64(p.TraceIdHigh)); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.traceIdHigh (2) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 2:traceIdHigh: ", p), err)
+	}
+	return err
+}
+
+func (p *Span) writeField3(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("spanId", thrift.I64, 3); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 3:spanId: ", p), err)
+	}
+	if err := oprot.WriteI64(int64(p.SpanId)); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.spanId (3) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 3:spanId: ", p), err)
+	}
+	return err
+}
+
+func (p *Span) writeField4(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("parentSpanId", thrift.I64, 4); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 4:parentSpanId: ", p), err)
+	}
+	if err := oprot.WriteI64(int64(p.ParentSpanId)); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.parentSpanId (4) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 4:parentSpanId: ", p), err)
+	}
+	return err
+}
+
+func (p *Span) writeField5(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("operationName", thrift.STRING, 5); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 5:operationName: ", p), err)
+	}
+	if err := oprot.WriteString(string(p.OperationName)); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.operationName (5) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 5:operationName: ", p), err)
+	}
+	return err
+}
+
+func (p *Span) writeField6(oprot thrift.TProtocol) (err error) {
+	if p.IsSetReferences() {
+		if err := oprot.WriteFieldBegin("references", thrift.LIST, 6); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field begin error 6:references: ", p), err)
+		}
+		if err := oprot.WriteListBegin(thrift.STRUCT, len(p.References)); err != nil {
+			return thrift.PrependError("error writing list begin: ", err)
+		}
+		for _, v := range p.References {
+			if err := v.Write(oprot); err != nil {
+				return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", v), err)
+			}
+		}
+		if err := oprot.WriteListEnd(); err != nil {
+			return thrift.PrependError("error writing list end: ", err)
+		}
+		if err := oprot.WriteFieldEnd(); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field end error 6:references: ", p), err)
+		}
+	}
+	return err
+}
+
+func (p *Span) writeField7(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("flags", thrift.I32, 7); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 7:flags: ", p), err)
+	}
+	if err := oprot.WriteI32(int32(p.Flags)); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.flags (7) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 7:flags: ", p), err)
+	}
+	return err
+}
+
+func (p *Span) writeField8(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("startTime", thrift.I64, 8); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 8:startTime: ", p), err)
+	}
+	if err := oprot.WriteI64(int64(p.StartTime)); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.startTime (8) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 8:startTime: ", p), err)
+	}
+	return err
+}
+
+func (p *Span) writeField9(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("duration", thrift.I64, 9); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 9:duration: ", p), err)
+	}
+	if err := oprot.WriteI64(int64(p.Duration)); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.duration (9) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 9:duration: ", p), err)
+	}
+	return err
+}
+
+func (p *Span) writeField10(oprot thrift.TProtocol) (err error) {
+	if p.IsSetTags() {
+		if err := oprot.WriteFieldBegin("tags", thrift.LIST, 10); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field begin error 10:tags: ", p), err)
+		}
+		if err := oprot.WriteListBegin(thrift.STRUCT, len(p.Tags)); err != nil {
+			return thrift.PrependError("error writing list begin: ", err)
+		}
+		for _, v := range p.Tags {
+			if err := v.Write(oprot); err != nil {
+				return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", v), err)
+			}
+		}
+		if err := oprot.WriteListEnd(); err != nil {
+			return thrift.PrependError("error writing list end: ", err)
+		}
+		if err := oprot.WriteFieldEnd(); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field end error 10:tags: ", p), err)
+		}
+	}
+	return err
+}
+
+func (p *Span) writeField11(oprot thrift.TProtocol) (err error) {
+	if p.IsSetLogs() {
+		if err := oprot.WriteFieldBegin("logs", thrift.LIST, 11); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field begin error 11:logs: ", p), err)
+		}
+		if err := oprot.WriteListBegin(thrift.STRUCT, len(p.Logs)); err != nil {
+			return thrift.PrependError("error writing list begin: ", err)
+		}
+		for _, v := range p.Logs {
+			if err := v.Write(oprot); err != nil {
+				return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", v), err)
+			}
+		}
+		if err := oprot.WriteListEnd(); err != nil {
+			return thrift.PrependError("error writing list end: ", err)
+		}
+		if err := oprot.WriteFieldEnd(); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field end error 11:logs: ", p), err)
+		}
+	}
+	return err
+}
+
+func (p *Span) String() string {
+	if p == nil {
+		return "<nil>"
+	}
+	return fmt.Sprintf("Span(%+v)", *p)
+}
+
+// Attributes:
+//  - ServiceName
+//  - Tags
+type Process struct {
+	ServiceName string `thrift:"serviceName,1,required" json:"serviceName"`
+	Tags        []*Tag `thrift:"tags,2" json:"tags,omitempty"`
+}
+
+func NewProcess() *Process {
+	return &Process{}
+}
+
+func (p *Process) GetServiceName() string {
+	return p.ServiceName
+}
+
+var Process_Tags_DEFAULT []*Tag
+
+func (p *Process) GetTags() []*Tag {
+	return p.Tags
+}
+func (p *Process) IsSetTags() bool {
+	return p.Tags != nil
+}
+
+func (p *Process) Read(iprot thrift.TProtocol) error {
+	if _, err := iprot.ReadStructBegin(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+	}
+
+	var issetServiceName bool = false
+
+	for {
+		_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
+		if err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+		}
+		if fieldTypeId == thrift.STOP {
+			break
+		}
+		switch fieldId {
+		case 1:
+			if err := p.readField1(iprot); err != nil {
+				return err
+			}
+			issetServiceName = true
+		case 2:
+			if err := p.readField2(iprot); err != nil {
+				return err
+			}
+		default:
+			if err := iprot.Skip(fieldTypeId); err != nil {
+				return err
+			}
+		}
+		if err := iprot.ReadFieldEnd(); err != nil {
+			return err
+		}
+	}
+	if err := iprot.ReadStructEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+	}
+	if !issetServiceName {
+		return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field ServiceName is not set"))
+	}
+	return nil
+}
+
+func (p *Process) readField1(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadString(); err != nil {
+		return thrift.PrependError("error reading field 1: ", err)
+	} else {
+		p.ServiceName = v
+	}
+	return nil
+}
+
+func (p *Process) readField2(iprot thrift.TProtocol) error {
+	_, size, err := iprot.ReadListBegin()
+	if err != nil {
+		return thrift.PrependError("error reading list begin: ", err)
+	}
+	tSlice := make([]*Tag, 0, size)
+	p.Tags = tSlice
+	for i := 0; i < size; i++ {
+		_elem4 := &Tag{}
+		if err := _elem4.Read(iprot); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", _elem4), err)
+		}
+		p.Tags = append(p.Tags, _elem4)
+	}
+	if err := iprot.ReadListEnd(); err != nil {
+		return thrift.PrependError("error reading list end: ", err)
+	}
+	return nil
+}
+
+func (p *Process) Write(oprot thrift.TProtocol) error {
+	if err := oprot.WriteStructBegin("Process"); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
+	}
+	if err := p.writeField1(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField2(oprot); err != nil {
+		return err
+	}
+	if err := oprot.WriteFieldStop(); err != nil {
+		return thrift.PrependError("write field stop error: ", err)
+	}
+	if err := oprot.WriteStructEnd(); err != nil {
+		return thrift.PrependError("write struct stop error: ", err)
+	}
+	return nil
+}
+
+func (p *Process) writeField1(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("serviceName", thrift.STRING, 1); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:serviceName: ", p), err)
+	}
+	if err := oprot.WriteString(string(p.ServiceName)); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.serviceName (1) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 1:serviceName: ", p), err)
+	}
+	return err
+}
+
+func (p *Process) writeField2(oprot thrift.TProtocol) (err error) {
+	if p.IsSetTags() {
+		if err := oprot.WriteFieldBegin("tags", thrift.LIST, 2); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field begin error 2:tags: ", p), err)
+		}
+		if err := oprot.WriteListBegin(thrift.STRUCT, len(p.Tags)); err != nil {
+			return thrift.PrependError("error writing list begin: ", err)
+		}
+		for _, v := range p.Tags {
+			if err := v.Write(oprot); err != nil {
+				return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", v), err)
+			}
+		}
+		if err := oprot.WriteListEnd(); err != nil {
+			return thrift.PrependError("error writing list end: ", err)
+		}
+		if err := oprot.WriteFieldEnd(); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field end error 2:tags: ", p), err)
+		}
+	}
+	return err
+}
+
+func (p *Process) String() string {
+	if p == nil {
+		return "<nil>"
+	}
+	return fmt.Sprintf("Process(%+v)", *p)
+}
+
+// Attributes:
+//  - Process
+//  - Spans
+type Batch struct {
+	Process *Process `thrift:"process,1,required" json:"process"`
+	Spans   []*Span  `thrift:"spans,2,required" json:"spans"`
+}
+
+func NewBatch() *Batch {
+	return &Batch{}
+}
+
+var Batch_Process_DEFAULT *Process
+
+func (p *Batch) GetProcess() *Process {
+	if !p.IsSetProcess() {
+		return Batch_Process_DEFAULT
+	}
+	return p.Process
+}
+
+func (p *Batch) GetSpans() []*Span {
+	return p.Spans
+}
+func (p *Batch) IsSetProcess() bool {
+	return p.Process != nil
+}
+
+func (p *Batch) Read(iprot thrift.TProtocol) error {
+	if _, err := iprot.ReadStructBegin(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+	}
+
+	var issetProcess bool = false
+	var issetSpans bool = false
+
+	for {
+		_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
+		if err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+		}
+		if fieldTypeId == thrift.STOP {
+			break
+		}
+		switch fieldId {
+		case 1:
+			if err := p.readField1(iprot); err != nil {
+				return err
+			}
+			issetProcess = true
+		case 2:
+			if err := p.readField2(iprot); err != nil {
+				return err
+			}
+			issetSpans = true
+		default:
+			if err := iprot.Skip(fieldTypeId); err != nil {
+				return err
+			}
+		}
+		if err := iprot.ReadFieldEnd(); err != nil {
+			return err
+		}
+	}
+	if err := iprot.ReadStructEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+	}
+	if !issetProcess {
+		return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field Process is not set"))
+	}
+	if !issetSpans {
+		return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field Spans is not set"))
+	}
+	return nil
+}
+
+func (p *Batch) readField1(iprot thrift.TProtocol) error {
+	p.Process = &Process{}
+	if err := p.Process.Read(iprot); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", p.Process), err)
+	}
+	return nil
+}
+
+func (p *Batch) readField2(iprot thrift.TProtocol) error {
+	_, size, err := iprot.ReadListBegin()
+	if err != nil {
+		return thrift.PrependError("error reading list begin: ", err)
+	}
+	tSlice := make([]*Span, 0, size)
+	p.Spans = tSlice
+	for i := 0; i < size; i++ {
+		_elem5 := &Span{}
+		if err := _elem5.Read(iprot); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", _elem5), err)
+		}
+		p.Spans = append(p.Spans, _elem5)
+	}
+	if err := iprot.ReadListEnd(); err != nil {
+		return thrift.PrependError("error reading list end: ", err)
+	}
+	return nil
+}
+
+func (p *Batch) Write(oprot thrift.TProtocol) error {
+	if err := oprot.WriteStructBegin("Batch"); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
+	}
+	if err := p.writeField1(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField2(oprot); err != nil {
+		return err
+	}
+	if err := oprot.WriteFieldStop(); err != nil {
+		return thrift.PrependError("write field stop error: ", err)
+	}
+	if err := oprot.WriteStructEnd(); err != nil {
+		return thrift.PrependError("write struct stop error: ", err)
+	}
+	return nil
+}
+
+func (p *Batch) writeField1(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("process", thrift.STRUCT, 1); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:process: ", p), err)
+	}
+	if err := p.Process.Write(oprot); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", p.Process), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 1:process: ", p), err)
+	}
+	return err
+}
+
+func (p *Batch) writeField2(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("spans", thrift.LIST, 2); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 2:spans: ", p), err)
+	}
+	if err := oprot.WriteListBegin(thrift.STRUCT, len(p.Spans)); err != nil {
+		return thrift.PrependError("error writing list begin: ", err)
+	}
+	for _, v := range p.Spans {
+		if err := v.Write(oprot); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", v), err)
+		}
+	}
+	if err := oprot.WriteListEnd(); err != nil {
+		return thrift.PrependError("error writing list end: ", err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 2:spans: ", p), err)
+	}
+	return err
+}
+
+func (p *Batch) String() string {
+	if p == nil {
+		return "<nil>"
+	}
+	return fmt.Sprintf("Batch(%+v)", *p)
+}
+
+// Attributes:
+//  - Ok
+type BatchSubmitResponse struct {
+	Ok bool `thrift:"ok,1,required" json:"ok"`
+}
+
+func NewBatchSubmitResponse() *BatchSubmitResponse {
+	return &BatchSubmitResponse{}
+}
+
+func (p *BatchSubmitResponse) GetOk() bool {
+	return p.Ok
+}
+func (p *BatchSubmitResponse) Read(iprot thrift.TProtocol) error {
+	if _, err := iprot.ReadStructBegin(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+	}
+
+	var issetOk bool = false
+
+	for {
+		_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
+		if err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+		}
+		if fieldTypeId == thrift.STOP {
+			break
+		}
+		switch fieldId {
+		case 1:
+			if err := p.readField1(iprot); err != nil {
+				return err
+			}
+			issetOk = true
+		default:
+			if err := iprot.Skip(fieldTypeId); err != nil {
+				return err
+			}
+		}
+		if err := iprot.ReadFieldEnd(); err != nil {
+			return err
+		}
+	}
+	if err := iprot.ReadStructEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+	}
+	if !issetOk {
+		return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field Ok is not set"))
+	}
+	return nil
+}
+
+func (p *BatchSubmitResponse) readField1(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadBool(); err != nil {
+		return thrift.PrependError("error reading field 1: ", err)
+	} else {
+		p.Ok = v
+	}
+	return nil
+}
+
+func (p *BatchSubmitResponse) Write(oprot thrift.TProtocol) error {
+	if err := oprot.WriteStructBegin("BatchSubmitResponse"); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
+	}
+	if err := p.writeField1(oprot); err != nil {
+		return err
+	}
+	if err := oprot.WriteFieldStop(); err != nil {
+		return thrift.PrependError("write field stop error: ", err)
+	}
+	if err := oprot.WriteStructEnd(); err != nil {
+		return thrift.PrependError("write struct stop error: ", err)
+	}
+	return nil
+}
+
+func (p *BatchSubmitResponse) writeField1(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("ok", thrift.BOOL, 1); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:ok: ", p), err)
+	}
+	if err := oprot.WriteBool(bool(p.Ok)); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.ok (1) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 1:ok: ", p), err)
+	}
+	return err
+}
+
+func (p *BatchSubmitResponse) String() string {
+	if p == nil {
+		return "<nil>"
+	}
+	return fmt.Sprintf("BatchSubmitResponse(%+v)", *p)
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift-gen/sampling/constants.go b/vendor/github.com/uber/jaeger-client-go/thrift-gen/sampling/constants.go
new file mode 100644
index 000000000..0f6e3a884
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift-gen/sampling/constants.go
@@ -0,0 +1,18 @@
+// Autogenerated by Thrift Compiler (0.9.3)
+// DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
+
+package sampling
+
+import (
+	"bytes"
+	"fmt"
+	"github.com/uber/jaeger-client-go/thrift"
+)
+
+// (needed to ensure safety because of naive import list construction.)
+var _ = thrift.ZERO
+var _ = fmt.Printf
+var _ = bytes.Equal
+
+func init() {
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift-gen/sampling/samplingmanager.go b/vendor/github.com/uber/jaeger-client-go/thrift-gen/sampling/samplingmanager.go
new file mode 100644
index 000000000..33179cfeb
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift-gen/sampling/samplingmanager.go
@@ -0,0 +1,410 @@
+// Autogenerated by Thrift Compiler (0.9.3)
+// DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
+
+package sampling
+
+import (
+	"bytes"
+	"fmt"
+	"github.com/uber/jaeger-client-go/thrift"
+)
+
+// (needed to ensure safety because of naive import list construction.)
+var _ = thrift.ZERO
+var _ = fmt.Printf
+var _ = bytes.Equal
+
+type SamplingManager interface {
+	// Parameters:
+	//  - ServiceName
+	GetSamplingStrategy(serviceName string) (r *SamplingStrategyResponse, err error)
+}
+
+type SamplingManagerClient struct {
+	Transport       thrift.TTransport
+	ProtocolFactory thrift.TProtocolFactory
+	InputProtocol   thrift.TProtocol
+	OutputProtocol  thrift.TProtocol
+	SeqId           int32
+}
+
+func NewSamplingManagerClientFactory(t thrift.TTransport, f thrift.TProtocolFactory) *SamplingManagerClient {
+	return &SamplingManagerClient{Transport: t,
+		ProtocolFactory: f,
+		InputProtocol:   f.GetProtocol(t),
+		OutputProtocol:  f.GetProtocol(t),
+		SeqId:           0,
+	}
+}
+
+func NewSamplingManagerClientProtocol(t thrift.TTransport, iprot thrift.TProtocol, oprot thrift.TProtocol) *SamplingManagerClient {
+	return &SamplingManagerClient{Transport: t,
+		ProtocolFactory: nil,
+		InputProtocol:   iprot,
+		OutputProtocol:  oprot,
+		SeqId:           0,
+	}
+}
+
+// Parameters:
+//  - ServiceName
+func (p *SamplingManagerClient) GetSamplingStrategy(serviceName string) (r *SamplingStrategyResponse, err error) {
+	if err = p.sendGetSamplingStrategy(serviceName); err != nil {
+		return
+	}
+	return p.recvGetSamplingStrategy()
+}
+
+func (p *SamplingManagerClient) sendGetSamplingStrategy(serviceName string) (err error) {
+	oprot := p.OutputProtocol
+	if oprot == nil {
+		oprot = p.ProtocolFactory.GetProtocol(p.Transport)
+		p.OutputProtocol = oprot
+	}
+	p.SeqId++
+	if err = oprot.WriteMessageBegin("getSamplingStrategy", thrift.CALL, p.SeqId); err != nil {
+		return
+	}
+	args := SamplingManagerGetSamplingStrategyArgs{
+		ServiceName: serviceName,
+	}
+	if err = args.Write(oprot); err != nil {
+		return
+	}
+	if err = oprot.WriteMessageEnd(); err != nil {
+		return
+	}
+	return oprot.Flush()
+}
+
+func (p *SamplingManagerClient) recvGetSamplingStrategy() (value *SamplingStrategyResponse, err error) {
+	iprot := p.InputProtocol
+	if iprot == nil {
+		iprot = p.ProtocolFactory.GetProtocol(p.Transport)
+		p.InputProtocol = iprot
+	}
+	method, mTypeId, seqId, err := iprot.ReadMessageBegin()
+	if err != nil {
+		return
+	}
+	if method != "getSamplingStrategy" {
+		err = thrift.NewTApplicationException(thrift.WRONG_METHOD_NAME, "getSamplingStrategy failed: wrong method name")
+		return
+	}
+	if p.SeqId != seqId {
+		err = thrift.NewTApplicationException(thrift.BAD_SEQUENCE_ID, "getSamplingStrategy failed: out of sequence response")
+		return
+	}
+	if mTypeId == thrift.EXCEPTION {
+		error1 := thrift.NewTApplicationException(thrift.UNKNOWN_APPLICATION_EXCEPTION, "Unknown Exception")
+		var error2 error
+		error2, err = error1.Read(iprot)
+		if err != nil {
+			return
+		}
+		if err = iprot.ReadMessageEnd(); err != nil {
+			return
+		}
+		err = error2
+		return
+	}
+	if mTypeId != thrift.REPLY {
+		err = thrift.NewTApplicationException(thrift.INVALID_MESSAGE_TYPE_EXCEPTION, "getSamplingStrategy failed: invalid message type")
+		return
+	}
+	result := SamplingManagerGetSamplingStrategyResult{}
+	if err = result.Read(iprot); err != nil {
+		return
+	}
+	if err = iprot.ReadMessageEnd(); err != nil {
+		return
+	}
+	value = result.GetSuccess()
+	return
+}
+
+type SamplingManagerProcessor struct {
+	processorMap map[string]thrift.TProcessorFunction
+	handler      SamplingManager
+}
+
+func (p *SamplingManagerProcessor) AddToProcessorMap(key string, processor thrift.TProcessorFunction) {
+	p.processorMap[key] = processor
+}
+
+func (p *SamplingManagerProcessor) GetProcessorFunction(key string) (processor thrift.TProcessorFunction, ok bool) {
+	processor, ok = p.processorMap[key]
+	return processor, ok
+}
+
+func (p *SamplingManagerProcessor) ProcessorMap() map[string]thrift.TProcessorFunction {
+	return p.processorMap
+}
+
+func NewSamplingManagerProcessor(handler SamplingManager) *SamplingManagerProcessor {
+
+	self3 := &SamplingManagerProcessor{handler: handler, processorMap: make(map[string]thrift.TProcessorFunction)}
+	self3.processorMap["getSamplingStrategy"] = &samplingManagerProcessorGetSamplingStrategy{handler: handler}
+	return self3
+}
+
+func (p *SamplingManagerProcessor) Process(iprot, oprot thrift.TProtocol) (success bool, err thrift.TException) {
+	name, _, seqId, err := iprot.ReadMessageBegin()
+	if err != nil {
+		return false, err
+	}
+	if processor, ok := p.GetProcessorFunction(name); ok {
+		return processor.Process(seqId, iprot, oprot)
+	}
+	iprot.Skip(thrift.STRUCT)
+	iprot.ReadMessageEnd()
+	x4 := thrift.NewTApplicationException(thrift.UNKNOWN_METHOD, "Unknown function "+name)
+	oprot.WriteMessageBegin(name, thrift.EXCEPTION, seqId)
+	x4.Write(oprot)
+	oprot.WriteMessageEnd()
+	oprot.Flush()
+	return false, x4
+
+}
+
+type samplingManagerProcessorGetSamplingStrategy struct {
+	handler SamplingManager
+}
+
+func (p *samplingManagerProcessorGetSamplingStrategy) Process(seqId int32, iprot, oprot thrift.TProtocol) (success bool, err thrift.TException) {
+	args := SamplingManagerGetSamplingStrategyArgs{}
+	if err = args.Read(iprot); err != nil {
+		iprot.ReadMessageEnd()
+		x := thrift.NewTApplicationException(thrift.PROTOCOL_ERROR, err.Error())
+		oprot.WriteMessageBegin("getSamplingStrategy", thrift.EXCEPTION, seqId)
+		x.Write(oprot)
+		oprot.WriteMessageEnd()
+		oprot.Flush()
+		return false, err
+	}
+
+	iprot.ReadMessageEnd()
+	result := SamplingManagerGetSamplingStrategyResult{}
+	var retval *SamplingStrategyResponse
+	var err2 error
+	if retval, err2 = p.handler.GetSamplingStrategy(args.ServiceName); err2 != nil {
+		x := thrift.NewTApplicationException(thrift.INTERNAL_ERROR, "Internal error processing getSamplingStrategy: "+err2.Error())
+		oprot.WriteMessageBegin("getSamplingStrategy", thrift.EXCEPTION, seqId)
+		x.Write(oprot)
+		oprot.WriteMessageEnd()
+		oprot.Flush()
+		return true, err2
+	} else {
+		result.Success = retval
+	}
+	if err2 = oprot.WriteMessageBegin("getSamplingStrategy", thrift.REPLY, seqId); err2 != nil {
+		err = err2
+	}
+	if err2 = result.Write(oprot); err == nil && err2 != nil {
+		err = err2
+	}
+	if err2 = oprot.WriteMessageEnd(); err == nil && err2 != nil {
+		err = err2
+	}
+	if err2 = oprot.Flush(); err == nil && err2 != nil {
+		err = err2
+	}
+	if err != nil {
+		return
+	}
+	return true, err
+}
+
+// HELPER FUNCTIONS AND STRUCTURES
+
+// Attributes:
+//  - ServiceName
+type SamplingManagerGetSamplingStrategyArgs struct {
+	ServiceName string `thrift:"serviceName,1" json:"serviceName"`
+}
+
+func NewSamplingManagerGetSamplingStrategyArgs() *SamplingManagerGetSamplingStrategyArgs {
+	return &SamplingManagerGetSamplingStrategyArgs{}
+}
+
+func (p *SamplingManagerGetSamplingStrategyArgs) GetServiceName() string {
+	return p.ServiceName
+}
+func (p *SamplingManagerGetSamplingStrategyArgs) Read(iprot thrift.TProtocol) error {
+	if _, err := iprot.ReadStructBegin(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+	}
+
+	for {
+		_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
+		if err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+		}
+		if fieldTypeId == thrift.STOP {
+			break
+		}
+		switch fieldId {
+		case 1:
+			if err := p.readField1(iprot); err != nil {
+				return err
+			}
+		default:
+			if err := iprot.Skip(fieldTypeId); err != nil {
+				return err
+			}
+		}
+		if err := iprot.ReadFieldEnd(); err != nil {
+			return err
+		}
+	}
+	if err := iprot.ReadStructEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+	}
+	return nil
+}
+
+func (p *SamplingManagerGetSamplingStrategyArgs) readField1(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadString(); err != nil {
+		return thrift.PrependError("error reading field 1: ", err)
+	} else {
+		p.ServiceName = v
+	}
+	return nil
+}
+
+func (p *SamplingManagerGetSamplingStrategyArgs) Write(oprot thrift.TProtocol) error {
+	if err := oprot.WriteStructBegin("getSamplingStrategy_args"); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
+	}
+	if err := p.writeField1(oprot); err != nil {
+		return err
+	}
+	if err := oprot.WriteFieldStop(); err != nil {
+		return thrift.PrependError("write field stop error: ", err)
+	}
+	if err := oprot.WriteStructEnd(); err != nil {
+		return thrift.PrependError("write struct stop error: ", err)
+	}
+	return nil
+}
+
+func (p *SamplingManagerGetSamplingStrategyArgs) writeField1(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("serviceName", thrift.STRING, 1); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:serviceName: ", p), err)
+	}
+	if err := oprot.WriteString(string(p.ServiceName)); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.serviceName (1) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 1:serviceName: ", p), err)
+	}
+	return err
+}
+
+func (p *SamplingManagerGetSamplingStrategyArgs) String() string {
+	if p == nil {
+		return "<nil>"
+	}
+	return fmt.Sprintf("SamplingManagerGetSamplingStrategyArgs(%+v)", *p)
+}
+
+// Attributes:
+//  - Success
+type SamplingManagerGetSamplingStrategyResult struct {
+	Success *SamplingStrategyResponse `thrift:"success,0" json:"success,omitempty"`
+}
+
+func NewSamplingManagerGetSamplingStrategyResult() *SamplingManagerGetSamplingStrategyResult {
+	return &SamplingManagerGetSamplingStrategyResult{}
+}
+
+var SamplingManagerGetSamplingStrategyResult_Success_DEFAULT *SamplingStrategyResponse
+
+func (p *SamplingManagerGetSamplingStrategyResult) GetSuccess() *SamplingStrategyResponse {
+	if !p.IsSetSuccess() {
+		return SamplingManagerGetSamplingStrategyResult_Success_DEFAULT
+	}
+	return p.Success
+}
+func (p *SamplingManagerGetSamplingStrategyResult) IsSetSuccess() bool {
+	return p.Success != nil
+}
+
+func (p *SamplingManagerGetSamplingStrategyResult) Read(iprot thrift.TProtocol) error {
+	if _, err := iprot.ReadStructBegin(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+	}
+
+	for {
+		_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
+		if err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+		}
+		if fieldTypeId == thrift.STOP {
+			break
+		}
+		switch fieldId {
+		case 0:
+			if err := p.readField0(iprot); err != nil {
+				return err
+			}
+		default:
+			if err := iprot.Skip(fieldTypeId); err != nil {
+				return err
+			}
+		}
+		if err := iprot.ReadFieldEnd(); err != nil {
+			return err
+		}
+	}
+	if err := iprot.ReadStructEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+	}
+	return nil
+}
+
+func (p *SamplingManagerGetSamplingStrategyResult) readField0(iprot thrift.TProtocol) error {
+	p.Success = &SamplingStrategyResponse{}
+	if err := p.Success.Read(iprot); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", p.Success), err)
+	}
+	return nil
+}
+
+func (p *SamplingManagerGetSamplingStrategyResult) Write(oprot thrift.TProtocol) error {
+	if err := oprot.WriteStructBegin("getSamplingStrategy_result"); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
+	}
+	if err := p.writeField0(oprot); err != nil {
+		return err
+	}
+	if err := oprot.WriteFieldStop(); err != nil {
+		return thrift.PrependError("write field stop error: ", err)
+	}
+	if err := oprot.WriteStructEnd(); err != nil {
+		return thrift.PrependError("write struct stop error: ", err)
+	}
+	return nil
+}
+
+func (p *SamplingManagerGetSamplingStrategyResult) writeField0(oprot thrift.TProtocol) (err error) {
+	if p.IsSetSuccess() {
+		if err := oprot.WriteFieldBegin("success", thrift.STRUCT, 0); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field begin error 0:success: ", p), err)
+		}
+		if err := p.Success.Write(oprot); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", p.Success), err)
+		}
+		if err := oprot.WriteFieldEnd(); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field end error 0:success: ", p), err)
+		}
+	}
+	return err
+}
+
+func (p *SamplingManagerGetSamplingStrategyResult) String() string {
+	if p == nil {
+		return "<nil>"
+	}
+	return fmt.Sprintf("SamplingManagerGetSamplingStrategyResult(%+v)", *p)
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift-gen/sampling/ttypes.go b/vendor/github.com/uber/jaeger-client-go/thrift-gen/sampling/ttypes.go
new file mode 100644
index 000000000..9abaf0542
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift-gen/sampling/ttypes.go
@@ -0,0 +1,873 @@
+// Autogenerated by Thrift Compiler (0.9.3)
+// DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
+
+package sampling
+
+import (
+	"bytes"
+	"fmt"
+	"github.com/uber/jaeger-client-go/thrift"
+)
+
+// (needed to ensure safety because of naive import list construction.)
+var _ = thrift.ZERO
+var _ = fmt.Printf
+var _ = bytes.Equal
+
+var GoUnusedProtection__ int
+
+type SamplingStrategyType int64
+
+const (
+	SamplingStrategyType_PROBABILISTIC SamplingStrategyType = 0
+	SamplingStrategyType_RATE_LIMITING SamplingStrategyType = 1
+)
+
+func (p SamplingStrategyType) String() string {
+	switch p {
+	case SamplingStrategyType_PROBABILISTIC:
+		return "PROBABILISTIC"
+	case SamplingStrategyType_RATE_LIMITING:
+		return "RATE_LIMITING"
+	}
+	return "<UNSET>"
+}
+
+func SamplingStrategyTypeFromString(s string) (SamplingStrategyType, error) {
+	switch s {
+	case "PROBABILISTIC":
+		return SamplingStrategyType_PROBABILISTIC, nil
+	case "RATE_LIMITING":
+		return SamplingStrategyType_RATE_LIMITING, nil
+	}
+	return SamplingStrategyType(0), fmt.Errorf("not a valid SamplingStrategyType string")
+}
+
+func SamplingStrategyTypePtr(v SamplingStrategyType) *SamplingStrategyType { return &v }
+
+func (p SamplingStrategyType) MarshalText() ([]byte, error) {
+	return []byte(p.String()), nil
+}
+
+func (p *SamplingStrategyType) UnmarshalText(text []byte) error {
+	q, err := SamplingStrategyTypeFromString(string(text))
+	if err != nil {
+		return err
+	}
+	*p = q
+	return nil
+}
+
+// Attributes:
+//  - SamplingRate
+type ProbabilisticSamplingStrategy struct {
+	SamplingRate float64 `thrift:"samplingRate,1,required" json:"samplingRate"`
+}
+
+func NewProbabilisticSamplingStrategy() *ProbabilisticSamplingStrategy {
+	return &ProbabilisticSamplingStrategy{}
+}
+
+func (p *ProbabilisticSamplingStrategy) GetSamplingRate() float64 {
+	return p.SamplingRate
+}
+func (p *ProbabilisticSamplingStrategy) Read(iprot thrift.TProtocol) error {
+	if _, err := iprot.ReadStructBegin(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+	}
+
+	var issetSamplingRate bool = false
+
+	for {
+		_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
+		if err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+		}
+		if fieldTypeId == thrift.STOP {
+			break
+		}
+		switch fieldId {
+		case 1:
+			if err := p.readField1(iprot); err != nil {
+				return err
+			}
+			issetSamplingRate = true
+		default:
+			if err := iprot.Skip(fieldTypeId); err != nil {
+				return err
+			}
+		}
+		if err := iprot.ReadFieldEnd(); err != nil {
+			return err
+		}
+	}
+	if err := iprot.ReadStructEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+	}
+	if !issetSamplingRate {
+		return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field SamplingRate is not set"))
+	}
+	return nil
+}
+
+func (p *ProbabilisticSamplingStrategy) readField1(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadDouble(); err != nil {
+		return thrift.PrependError("error reading field 1: ", err)
+	} else {
+		p.SamplingRate = v
+	}
+	return nil
+}
+
+func (p *ProbabilisticSamplingStrategy) Write(oprot thrift.TProtocol) error {
+	if err := oprot.WriteStructBegin("ProbabilisticSamplingStrategy"); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
+	}
+	if err := p.writeField1(oprot); err != nil {
+		return err
+	}
+	if err := oprot.WriteFieldStop(); err != nil {
+		return thrift.PrependError("write field stop error: ", err)
+	}
+	if err := oprot.WriteStructEnd(); err != nil {
+		return thrift.PrependError("write struct stop error: ", err)
+	}
+	return nil
+}
+
+func (p *ProbabilisticSamplingStrategy) writeField1(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("samplingRate", thrift.DOUBLE, 1); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:samplingRate: ", p), err)
+	}
+	if err := oprot.WriteDouble(float64(p.SamplingRate)); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.samplingRate (1) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 1:samplingRate: ", p), err)
+	}
+	return err
+}
+
+func (p *ProbabilisticSamplingStrategy) String() string {
+	if p == nil {
+		return "<nil>"
+	}
+	return fmt.Sprintf("ProbabilisticSamplingStrategy(%+v)", *p)
+}
+
+// Attributes:
+//  - MaxTracesPerSecond
+type RateLimitingSamplingStrategy struct {
+	MaxTracesPerSecond int16 `thrift:"maxTracesPerSecond,1,required" json:"maxTracesPerSecond"`
+}
+
+func NewRateLimitingSamplingStrategy() *RateLimitingSamplingStrategy {
+	return &RateLimitingSamplingStrategy{}
+}
+
+func (p *RateLimitingSamplingStrategy) GetMaxTracesPerSecond() int16 {
+	return p.MaxTracesPerSecond
+}
+func (p *RateLimitingSamplingStrategy) Read(iprot thrift.TProtocol) error {
+	if _, err := iprot.ReadStructBegin(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+	}
+
+	var issetMaxTracesPerSecond bool = false
+
+	for {
+		_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
+		if err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+		}
+		if fieldTypeId == thrift.STOP {
+			break
+		}
+		switch fieldId {
+		case 1:
+			if err := p.readField1(iprot); err != nil {
+				return err
+			}
+			issetMaxTracesPerSecond = true
+		default:
+			if err := iprot.Skip(fieldTypeId); err != nil {
+				return err
+			}
+		}
+		if err := iprot.ReadFieldEnd(); err != nil {
+			return err
+		}
+	}
+	if err := iprot.ReadStructEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+	}
+	if !issetMaxTracesPerSecond {
+		return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field MaxTracesPerSecond is not set"))
+	}
+	return nil
+}
+
+func (p *RateLimitingSamplingStrategy) readField1(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadI16(); err != nil {
+		return thrift.PrependError("error reading field 1: ", err)
+	} else {
+		p.MaxTracesPerSecond = v
+	}
+	return nil
+}
+
+func (p *RateLimitingSamplingStrategy) Write(oprot thrift.TProtocol) error {
+	if err := oprot.WriteStructBegin("RateLimitingSamplingStrategy"); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
+	}
+	if err := p.writeField1(oprot); err != nil {
+		return err
+	}
+	if err := oprot.WriteFieldStop(); err != nil {
+		return thrift.PrependError("write field stop error: ", err)
+	}
+	if err := oprot.WriteStructEnd(); err != nil {
+		return thrift.PrependError("write struct stop error: ", err)
+	}
+	return nil
+}
+
+func (p *RateLimitingSamplingStrategy) writeField1(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("maxTracesPerSecond", thrift.I16, 1); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:maxTracesPerSecond: ", p), err)
+	}
+	if err := oprot.WriteI16(int16(p.MaxTracesPerSecond)); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.maxTracesPerSecond (1) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 1:maxTracesPerSecond: ", p), err)
+	}
+	return err
+}
+
+func (p *RateLimitingSamplingStrategy) String() string {
+	if p == nil {
+		return "<nil>"
+	}
+	return fmt.Sprintf("RateLimitingSamplingStrategy(%+v)", *p)
+}
+
+// Attributes:
+//  - Operation
+//  - ProbabilisticSampling
+type OperationSamplingStrategy struct {
+	Operation             string                         `thrift:"operation,1,required" json:"operation"`
+	ProbabilisticSampling *ProbabilisticSamplingStrategy `thrift:"probabilisticSampling,2,required" json:"probabilisticSampling"`
+}
+
+func NewOperationSamplingStrategy() *OperationSamplingStrategy {
+	return &OperationSamplingStrategy{}
+}
+
+func (p *OperationSamplingStrategy) GetOperation() string {
+	return p.Operation
+}
+
+var OperationSamplingStrategy_ProbabilisticSampling_DEFAULT *ProbabilisticSamplingStrategy
+
+func (p *OperationSamplingStrategy) GetProbabilisticSampling() *ProbabilisticSamplingStrategy {
+	if !p.IsSetProbabilisticSampling() {
+		return OperationSamplingStrategy_ProbabilisticSampling_DEFAULT
+	}
+	return p.ProbabilisticSampling
+}
+func (p *OperationSamplingStrategy) IsSetProbabilisticSampling() bool {
+	return p.ProbabilisticSampling != nil
+}
+
+func (p *OperationSamplingStrategy) Read(iprot thrift.TProtocol) error {
+	if _, err := iprot.ReadStructBegin(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+	}
+
+	var issetOperation bool = false
+	var issetProbabilisticSampling bool = false
+
+	for {
+		_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
+		if err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+		}
+		if fieldTypeId == thrift.STOP {
+			break
+		}
+		switch fieldId {
+		case 1:
+			if err := p.readField1(iprot); err != nil {
+				return err
+			}
+			issetOperation = true
+		case 2:
+			if err := p.readField2(iprot); err != nil {
+				return err
+			}
+			issetProbabilisticSampling = true
+		default:
+			if err := iprot.Skip(fieldTypeId); err != nil {
+				return err
+			}
+		}
+		if err := iprot.ReadFieldEnd(); err != nil {
+			return err
+		}
+	}
+	if err := iprot.ReadStructEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+	}
+	if !issetOperation {
+		return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field Operation is not set"))
+	}
+	if !issetProbabilisticSampling {
+		return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field ProbabilisticSampling is not set"))
+	}
+	return nil
+}
+
+func (p *OperationSamplingStrategy) readField1(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadString(); err != nil {
+		return thrift.PrependError("error reading field 1: ", err)
+	} else {
+		p.Operation = v
+	}
+	return nil
+}
+
+func (p *OperationSamplingStrategy) readField2(iprot thrift.TProtocol) error {
+	p.ProbabilisticSampling = &ProbabilisticSamplingStrategy{}
+	if err := p.ProbabilisticSampling.Read(iprot); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", p.ProbabilisticSampling), err)
+	}
+	return nil
+}
+
+func (p *OperationSamplingStrategy) Write(oprot thrift.TProtocol) error {
+	if err := oprot.WriteStructBegin("OperationSamplingStrategy"); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
+	}
+	if err := p.writeField1(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField2(oprot); err != nil {
+		return err
+	}
+	if err := oprot.WriteFieldStop(); err != nil {
+		return thrift.PrependError("write field stop error: ", err)
+	}
+	if err := oprot.WriteStructEnd(); err != nil {
+		return thrift.PrependError("write struct stop error: ", err)
+	}
+	return nil
+}
+
+func (p *OperationSamplingStrategy) writeField1(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("operation", thrift.STRING, 1); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:operation: ", p), err)
+	}
+	if err := oprot.WriteString(string(p.Operation)); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.operation (1) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 1:operation: ", p), err)
+	}
+	return err
+}
+
+func (p *OperationSamplingStrategy) writeField2(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("probabilisticSampling", thrift.STRUCT, 2); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 2:probabilisticSampling: ", p), err)
+	}
+	if err := p.ProbabilisticSampling.Write(oprot); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", p.ProbabilisticSampling), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 2:probabilisticSampling: ", p), err)
+	}
+	return err
+}
+
+func (p *OperationSamplingStrategy) String() string {
+	if p == nil {
+		return "<nil>"
+	}
+	return fmt.Sprintf("OperationSamplingStrategy(%+v)", *p)
+}
+
+// Attributes:
+//  - DefaultSamplingProbability
+//  - DefaultLowerBoundTracesPerSecond
+//  - PerOperationStrategies
+//  - DefaultUpperBoundTracesPerSecond
+type PerOperationSamplingStrategies struct {
+	DefaultSamplingProbability       float64                      `thrift:"defaultSamplingProbability,1,required" json:"defaultSamplingProbability"`
+	DefaultLowerBoundTracesPerSecond float64                      `thrift:"defaultLowerBoundTracesPerSecond,2,required" json:"defaultLowerBoundTracesPerSecond"`
+	PerOperationStrategies           []*OperationSamplingStrategy `thrift:"perOperationStrategies,3,required" json:"perOperationStrategies"`
+	DefaultUpperBoundTracesPerSecond *float64                     `thrift:"defaultUpperBoundTracesPerSecond,4" json:"defaultUpperBoundTracesPerSecond,omitempty"`
+}
+
+func NewPerOperationSamplingStrategies() *PerOperationSamplingStrategies {
+	return &PerOperationSamplingStrategies{}
+}
+
+func (p *PerOperationSamplingStrategies) GetDefaultSamplingProbability() float64 {
+	return p.DefaultSamplingProbability
+}
+
+func (p *PerOperationSamplingStrategies) GetDefaultLowerBoundTracesPerSecond() float64 {
+	return p.DefaultLowerBoundTracesPerSecond
+}
+
+func (p *PerOperationSamplingStrategies) GetPerOperationStrategies() []*OperationSamplingStrategy {
+	return p.PerOperationStrategies
+}
+
+var PerOperationSamplingStrategies_DefaultUpperBoundTracesPerSecond_DEFAULT float64
+
+func (p *PerOperationSamplingStrategies) GetDefaultUpperBoundTracesPerSecond() float64 {
+	if !p.IsSetDefaultUpperBoundTracesPerSecond() {
+		return PerOperationSamplingStrategies_DefaultUpperBoundTracesPerSecond_DEFAULT
+	}
+	return *p.DefaultUpperBoundTracesPerSecond
+}
+func (p *PerOperationSamplingStrategies) IsSetDefaultUpperBoundTracesPerSecond() bool {
+	return p.DefaultUpperBoundTracesPerSecond != nil
+}
+
+func (p *PerOperationSamplingStrategies) Read(iprot thrift.TProtocol) error {
+	if _, err := iprot.ReadStructBegin(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+	}
+
+	var issetDefaultSamplingProbability bool = false
+	var issetDefaultLowerBoundTracesPerSecond bool = false
+	var issetPerOperationStrategies bool = false
+
+	for {
+		_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
+		if err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+		}
+		if fieldTypeId == thrift.STOP {
+			break
+		}
+		switch fieldId {
+		case 1:
+			if err := p.readField1(iprot); err != nil {
+				return err
+			}
+			issetDefaultSamplingProbability = true
+		case 2:
+			if err := p.readField2(iprot); err != nil {
+				return err
+			}
+			issetDefaultLowerBoundTracesPerSecond = true
+		case 3:
+			if err := p.readField3(iprot); err != nil {
+				return err
+			}
+			issetPerOperationStrategies = true
+		case 4:
+			if err := p.readField4(iprot); err != nil {
+				return err
+			}
+		default:
+			if err := iprot.Skip(fieldTypeId); err != nil {
+				return err
+			}
+		}
+		if err := iprot.ReadFieldEnd(); err != nil {
+			return err
+		}
+	}
+	if err := iprot.ReadStructEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+	}
+	if !issetDefaultSamplingProbability {
+		return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field DefaultSamplingProbability is not set"))
+	}
+	if !issetDefaultLowerBoundTracesPerSecond {
+		return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field DefaultLowerBoundTracesPerSecond is not set"))
+	}
+	if !issetPerOperationStrategies {
+		return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field PerOperationStrategies is not set"))
+	}
+	return nil
+}
+
+func (p *PerOperationSamplingStrategies) readField1(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadDouble(); err != nil {
+		return thrift.PrependError("error reading field 1: ", err)
+	} else {
+		p.DefaultSamplingProbability = v
+	}
+	return nil
+}
+
+func (p *PerOperationSamplingStrategies) readField2(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadDouble(); err != nil {
+		return thrift.PrependError("error reading field 2: ", err)
+	} else {
+		p.DefaultLowerBoundTracesPerSecond = v
+	}
+	return nil
+}
+
+func (p *PerOperationSamplingStrategies) readField3(iprot thrift.TProtocol) error {
+	_, size, err := iprot.ReadListBegin()
+	if err != nil {
+		return thrift.PrependError("error reading list begin: ", err)
+	}
+	tSlice := make([]*OperationSamplingStrategy, 0, size)
+	p.PerOperationStrategies = tSlice
+	for i := 0; i < size; i++ {
+		_elem0 := &OperationSamplingStrategy{}
+		if err := _elem0.Read(iprot); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", _elem0), err)
+		}
+		p.PerOperationStrategies = append(p.PerOperationStrategies, _elem0)
+	}
+	if err := iprot.ReadListEnd(); err != nil {
+		return thrift.PrependError("error reading list end: ", err)
+	}
+	return nil
+}
+
+func (p *PerOperationSamplingStrategies) readField4(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadDouble(); err != nil {
+		return thrift.PrependError("error reading field 4: ", err)
+	} else {
+		p.DefaultUpperBoundTracesPerSecond = &v
+	}
+	return nil
+}
+
+func (p *PerOperationSamplingStrategies) Write(oprot thrift.TProtocol) error {
+	if err := oprot.WriteStructBegin("PerOperationSamplingStrategies"); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
+	}
+	if err := p.writeField1(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField2(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField3(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField4(oprot); err != nil {
+		return err
+	}
+	if err := oprot.WriteFieldStop(); err != nil {
+		return thrift.PrependError("write field stop error: ", err)
+	}
+	if err := oprot.WriteStructEnd(); err != nil {
+		return thrift.PrependError("write struct stop error: ", err)
+	}
+	return nil
+}
+
+func (p *PerOperationSamplingStrategies) writeField1(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("defaultSamplingProbability", thrift.DOUBLE, 1); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:defaultSamplingProbability: ", p), err)
+	}
+	if err := oprot.WriteDouble(float64(p.DefaultSamplingProbability)); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.defaultSamplingProbability (1) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 1:defaultSamplingProbability: ", p), err)
+	}
+	return err
+}
+
+func (p *PerOperationSamplingStrategies) writeField2(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("defaultLowerBoundTracesPerSecond", thrift.DOUBLE, 2); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 2:defaultLowerBoundTracesPerSecond: ", p), err)
+	}
+	if err := oprot.WriteDouble(float64(p.DefaultLowerBoundTracesPerSecond)); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.defaultLowerBoundTracesPerSecond (2) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 2:defaultLowerBoundTracesPerSecond: ", p), err)
+	}
+	return err
+}
+
+func (p *PerOperationSamplingStrategies) writeField3(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("perOperationStrategies", thrift.LIST, 3); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 3:perOperationStrategies: ", p), err)
+	}
+	if err := oprot.WriteListBegin(thrift.STRUCT, len(p.PerOperationStrategies)); err != nil {
+		return thrift.PrependError("error writing list begin: ", err)
+	}
+	for _, v := range p.PerOperationStrategies {
+		if err := v.Write(oprot); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", v), err)
+		}
+	}
+	if err := oprot.WriteListEnd(); err != nil {
+		return thrift.PrependError("error writing list end: ", err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 3:perOperationStrategies: ", p), err)
+	}
+	return err
+}
+
+func (p *PerOperationSamplingStrategies) writeField4(oprot thrift.TProtocol) (err error) {
+	if p.IsSetDefaultUpperBoundTracesPerSecond() {
+		if err := oprot.WriteFieldBegin("defaultUpperBoundTracesPerSecond", thrift.DOUBLE, 4); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field begin error 4:defaultUpperBoundTracesPerSecond: ", p), err)
+		}
+		if err := oprot.WriteDouble(float64(*p.DefaultUpperBoundTracesPerSecond)); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T.defaultUpperBoundTracesPerSecond (4) field write error: ", p), err)
+		}
+		if err := oprot.WriteFieldEnd(); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field end error 4:defaultUpperBoundTracesPerSecond: ", p), err)
+		}
+	}
+	return err
+}
+
+func (p *PerOperationSamplingStrategies) String() string {
+	if p == nil {
+		return "<nil>"
+	}
+	return fmt.Sprintf("PerOperationSamplingStrategies(%+v)", *p)
+}
+
+// Attributes:
+//  - StrategyType
+//  - ProbabilisticSampling
+//  - RateLimitingSampling
+//  - OperationSampling
+type SamplingStrategyResponse struct {
+	StrategyType          SamplingStrategyType            `thrift:"strategyType,1,required" json:"strategyType"`
+	ProbabilisticSampling *ProbabilisticSamplingStrategy  `thrift:"probabilisticSampling,2" json:"probabilisticSampling,omitempty"`
+	RateLimitingSampling  *RateLimitingSamplingStrategy   `thrift:"rateLimitingSampling,3" json:"rateLimitingSampling,omitempty"`
+	OperationSampling     *PerOperationSamplingStrategies `thrift:"operationSampling,4" json:"operationSampling,omitempty"`
+}
+
+func NewSamplingStrategyResponse() *SamplingStrategyResponse {
+	return &SamplingStrategyResponse{}
+}
+
+func (p *SamplingStrategyResponse) GetStrategyType() SamplingStrategyType {
+	return p.StrategyType
+}
+
+var SamplingStrategyResponse_ProbabilisticSampling_DEFAULT *ProbabilisticSamplingStrategy
+
+func (p *SamplingStrategyResponse) GetProbabilisticSampling() *ProbabilisticSamplingStrategy {
+	if !p.IsSetProbabilisticSampling() {
+		return SamplingStrategyResponse_ProbabilisticSampling_DEFAULT
+	}
+	return p.ProbabilisticSampling
+}
+
+var SamplingStrategyResponse_RateLimitingSampling_DEFAULT *RateLimitingSamplingStrategy
+
+func (p *SamplingStrategyResponse) GetRateLimitingSampling() *RateLimitingSamplingStrategy {
+	if !p.IsSetRateLimitingSampling() {
+		return SamplingStrategyResponse_RateLimitingSampling_DEFAULT
+	}
+	return p.RateLimitingSampling
+}
+
+var SamplingStrategyResponse_OperationSampling_DEFAULT *PerOperationSamplingStrategies
+
+func (p *SamplingStrategyResponse) GetOperationSampling() *PerOperationSamplingStrategies {
+	if !p.IsSetOperationSampling() {
+		return SamplingStrategyResponse_OperationSampling_DEFAULT
+	}
+	return p.OperationSampling
+}
+func (p *SamplingStrategyResponse) IsSetProbabilisticSampling() bool {
+	return p.ProbabilisticSampling != nil
+}
+
+func (p *SamplingStrategyResponse) IsSetRateLimitingSampling() bool {
+	return p.RateLimitingSampling != nil
+}
+
+func (p *SamplingStrategyResponse) IsSetOperationSampling() bool {
+	return p.OperationSampling != nil
+}
+
+func (p *SamplingStrategyResponse) Read(iprot thrift.TProtocol) error {
+	if _, err := iprot.ReadStructBegin(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+	}
+
+	var issetStrategyType bool = false
+
+	for {
+		_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
+		if err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+		}
+		if fieldTypeId == thrift.STOP {
+			break
+		}
+		switch fieldId {
+		case 1:
+			if err := p.readField1(iprot); err != nil {
+				return err
+			}
+			issetStrategyType = true
+		case 2:
+			if err := p.readField2(iprot); err != nil {
+				return err
+			}
+		case 3:
+			if err := p.readField3(iprot); err != nil {
+				return err
+			}
+		case 4:
+			if err := p.readField4(iprot); err != nil {
+				return err
+			}
+		default:
+			if err := iprot.Skip(fieldTypeId); err != nil {
+				return err
+			}
+		}
+		if err := iprot.ReadFieldEnd(); err != nil {
+			return err
+		}
+	}
+	if err := iprot.ReadStructEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+	}
+	if !issetStrategyType {
+		return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field StrategyType is not set"))
+	}
+	return nil
+}
+
+func (p *SamplingStrategyResponse) readField1(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadI32(); err != nil {
+		return thrift.PrependError("error reading field 1: ", err)
+	} else {
+		temp := SamplingStrategyType(v)
+		p.StrategyType = temp
+	}
+	return nil
+}
+
+func (p *SamplingStrategyResponse) readField2(iprot thrift.TProtocol) error {
+	p.ProbabilisticSampling = &ProbabilisticSamplingStrategy{}
+	if err := p.ProbabilisticSampling.Read(iprot); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", p.ProbabilisticSampling), err)
+	}
+	return nil
+}
+
+func (p *SamplingStrategyResponse) readField3(iprot thrift.TProtocol) error {
+	p.RateLimitingSampling = &RateLimitingSamplingStrategy{}
+	if err := p.RateLimitingSampling.Read(iprot); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", p.RateLimitingSampling), err)
+	}
+	return nil
+}
+
+func (p *SamplingStrategyResponse) readField4(iprot thrift.TProtocol) error {
+	p.OperationSampling = &PerOperationSamplingStrategies{}
+	if err := p.OperationSampling.Read(iprot); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", p.OperationSampling), err)
+	}
+	return nil
+}
+
+func (p *SamplingStrategyResponse) Write(oprot thrift.TProtocol) error {
+	if err := oprot.WriteStructBegin("SamplingStrategyResponse"); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
+	}
+	if err := p.writeField1(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField2(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField3(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField4(oprot); err != nil {
+		return err
+	}
+	if err := oprot.WriteFieldStop(); err != nil {
+		return thrift.PrependError("write field stop error: ", err)
+	}
+	if err := oprot.WriteStructEnd(); err != nil {
+		return thrift.PrependError("write struct stop error: ", err)
+	}
+	return nil
+}
+
+func (p *SamplingStrategyResponse) writeField1(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("strategyType", thrift.I32, 1); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:strategyType: ", p), err)
+	}
+	if err := oprot.WriteI32(int32(p.StrategyType)); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.strategyType (1) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 1:strategyType: ", p), err)
+	}
+	return err
+}
+
+func (p *SamplingStrategyResponse) writeField2(oprot thrift.TProtocol) (err error) {
+	if p.IsSetProbabilisticSampling() {
+		if err := oprot.WriteFieldBegin("probabilisticSampling", thrift.STRUCT, 2); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field begin error 2:probabilisticSampling: ", p), err)
+		}
+		if err := p.ProbabilisticSampling.Write(oprot); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", p.ProbabilisticSampling), err)
+		}
+		if err := oprot.WriteFieldEnd(); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field end error 2:probabilisticSampling: ", p), err)
+		}
+	}
+	return err
+}
+
+func (p *SamplingStrategyResponse) writeField3(oprot thrift.TProtocol) (err error) {
+	if p.IsSetRateLimitingSampling() {
+		if err := oprot.WriteFieldBegin("rateLimitingSampling", thrift.STRUCT, 3); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field begin error 3:rateLimitingSampling: ", p), err)
+		}
+		if err := p.RateLimitingSampling.Write(oprot); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", p.RateLimitingSampling), err)
+		}
+		if err := oprot.WriteFieldEnd(); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field end error 3:rateLimitingSampling: ", p), err)
+		}
+	}
+	return err
+}
+
+func (p *SamplingStrategyResponse) writeField4(oprot thrift.TProtocol) (err error) {
+	if p.IsSetOperationSampling() {
+		if err := oprot.WriteFieldBegin("operationSampling", thrift.STRUCT, 4); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field begin error 4:operationSampling: ", p), err)
+		}
+		if err := p.OperationSampling.Write(oprot); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", p.OperationSampling), err)
+		}
+		if err := oprot.WriteFieldEnd(); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field end error 4:operationSampling: ", p), err)
+		}
+	}
+	return err
+}
+
+func (p *SamplingStrategyResponse) String() string {
+	if p == nil {
+		return "<nil>"
+	}
+	return fmt.Sprintf("SamplingStrategyResponse(%+v)", *p)
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift-gen/zipkincore/constants.go b/vendor/github.com/uber/jaeger-client-go/thrift-gen/zipkincore/constants.go
new file mode 100644
index 000000000..f05144bfc
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift-gen/zipkincore/constants.go
@@ -0,0 +1,32 @@
+// Autogenerated by Thrift Compiler (0.9.3)
+// DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
+
+package zipkincore
+
+import (
+	"bytes"
+	"fmt"
+	"github.com/uber/jaeger-client-go/thrift"
+)
+
+// (needed to ensure safety because of naive import list construction.)
+var _ = thrift.ZERO
+var _ = fmt.Printf
+var _ = bytes.Equal
+
+const CLIENT_SEND = "cs"
+const CLIENT_RECV = "cr"
+const SERVER_SEND = "ss"
+const SERVER_RECV = "sr"
+const WIRE_SEND = "ws"
+const WIRE_RECV = "wr"
+const CLIENT_SEND_FRAGMENT = "csf"
+const CLIENT_RECV_FRAGMENT = "crf"
+const SERVER_SEND_FRAGMENT = "ssf"
+const SERVER_RECV_FRAGMENT = "srf"
+const LOCAL_COMPONENT = "lc"
+const CLIENT_ADDR = "ca"
+const SERVER_ADDR = "sa"
+
+func init() {
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift-gen/zipkincore/ttypes.go b/vendor/github.com/uber/jaeger-client-go/thrift-gen/zipkincore/ttypes.go
new file mode 100644
index 000000000..34b2b267e
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift-gen/zipkincore/ttypes.go
@@ -0,0 +1,1247 @@
+// Autogenerated by Thrift Compiler (0.9.3)
+// DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
+
+package zipkincore
+
+import (
+	"bytes"
+	"fmt"
+	"github.com/uber/jaeger-client-go/thrift"
+)
+
+// (needed to ensure safety because of naive import list construction.)
+var _ = thrift.ZERO
+var _ = fmt.Printf
+var _ = bytes.Equal
+
+var GoUnusedProtection__ int
+
+type AnnotationType int64
+
+const (
+	AnnotationType_BOOL   AnnotationType = 0
+	AnnotationType_BYTES  AnnotationType = 1
+	AnnotationType_I16    AnnotationType = 2
+	AnnotationType_I32    AnnotationType = 3
+	AnnotationType_I64    AnnotationType = 4
+	AnnotationType_DOUBLE AnnotationType = 5
+	AnnotationType_STRING AnnotationType = 6
+)
+
+func (p AnnotationType) String() string {
+	switch p {
+	case AnnotationType_BOOL:
+		return "BOOL"
+	case AnnotationType_BYTES:
+		return "BYTES"
+	case AnnotationType_I16:
+		return "I16"
+	case AnnotationType_I32:
+		return "I32"
+	case AnnotationType_I64:
+		return "I64"
+	case AnnotationType_DOUBLE:
+		return "DOUBLE"
+	case AnnotationType_STRING:
+		return "STRING"
+	}
+	return "<UNSET>"
+}
+
+func AnnotationTypeFromString(s string) (AnnotationType, error) {
+	switch s {
+	case "BOOL":
+		return AnnotationType_BOOL, nil
+	case "BYTES":
+		return AnnotationType_BYTES, nil
+	case "I16":
+		return AnnotationType_I16, nil
+	case "I32":
+		return AnnotationType_I32, nil
+	case "I64":
+		return AnnotationType_I64, nil
+	case "DOUBLE":
+		return AnnotationType_DOUBLE, nil
+	case "STRING":
+		return AnnotationType_STRING, nil
+	}
+	return AnnotationType(0), fmt.Errorf("not a valid AnnotationType string")
+}
+
+func AnnotationTypePtr(v AnnotationType) *AnnotationType { return &v }
+
+func (p AnnotationType) MarshalText() ([]byte, error) {
+	return []byte(p.String()), nil
+}
+
+func (p *AnnotationType) UnmarshalText(text []byte) error {
+	q, err := AnnotationTypeFromString(string(text))
+	if err != nil {
+		return err
+	}
+	*p = q
+	return nil
+}
+
+// Indicates the network context of a service recording an annotation with two
+// exceptions.
+//
+// When a BinaryAnnotation, and key is CLIENT_ADDR or SERVER_ADDR,
+// the endpoint indicates the source or destination of an RPC. This exception
+// allows zipkin to display network context of uninstrumented services, or
+// clients such as web browsers.
+//
+// Attributes:
+//  - Ipv4: IPv4 host address packed into 4 bytes.
+//
+// Ex for the ip 1.2.3.4, it would be (1 << 24) | (2 << 16) | (3 << 8) | 4
+//  - Port: IPv4 port
+//
+// Note: this is to be treated as an unsigned integer, so watch for negatives.
+//
+// Conventionally, when the port isn't known, port = 0.
+//  - ServiceName: Service name in lowercase, such as "memcache" or "zipkin-web"
+//
+// Conventionally, when the service name isn't known, service_name = "unknown".
+type Endpoint struct {
+	Ipv4        int32  `thrift:"ipv4,1" json:"ipv4"`
+	Port        int16  `thrift:"port,2" json:"port"`
+	ServiceName string `thrift:"service_name,3" json:"service_name"`
+}
+
+func NewEndpoint() *Endpoint {
+	return &Endpoint{}
+}
+
+func (p *Endpoint) GetIpv4() int32 {
+	return p.Ipv4
+}
+
+func (p *Endpoint) GetPort() int16 {
+	return p.Port
+}
+
+func (p *Endpoint) GetServiceName() string {
+	return p.ServiceName
+}
+func (p *Endpoint) Read(iprot thrift.TProtocol) error {
+	if _, err := iprot.ReadStructBegin(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+	}
+
+	for {
+		_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
+		if err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+		}
+		if fieldTypeId == thrift.STOP {
+			break
+		}
+		switch fieldId {
+		case 1:
+			if err := p.readField1(iprot); err != nil {
+				return err
+			}
+		case 2:
+			if err := p.readField2(iprot); err != nil {
+				return err
+			}
+		case 3:
+			if err := p.readField3(iprot); err != nil {
+				return err
+			}
+		default:
+			if err := iprot.Skip(fieldTypeId); err != nil {
+				return err
+			}
+		}
+		if err := iprot.ReadFieldEnd(); err != nil {
+			return err
+		}
+	}
+	if err := iprot.ReadStructEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+	}
+	return nil
+}
+
+func (p *Endpoint) readField1(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadI32(); err != nil {
+		return thrift.PrependError("error reading field 1: ", err)
+	} else {
+		p.Ipv4 = v
+	}
+	return nil
+}
+
+func (p *Endpoint) readField2(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadI16(); err != nil {
+		return thrift.PrependError("error reading field 2: ", err)
+	} else {
+		p.Port = v
+	}
+	return nil
+}
+
+func (p *Endpoint) readField3(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadString(); err != nil {
+		return thrift.PrependError("error reading field 3: ", err)
+	} else {
+		p.ServiceName = v
+	}
+	return nil
+}
+
+func (p *Endpoint) Write(oprot thrift.TProtocol) error {
+	if err := oprot.WriteStructBegin("Endpoint"); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
+	}
+	if err := p.writeField1(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField2(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField3(oprot); err != nil {
+		return err
+	}
+	if err := oprot.WriteFieldStop(); err != nil {
+		return thrift.PrependError("write field stop error: ", err)
+	}
+	if err := oprot.WriteStructEnd(); err != nil {
+		return thrift.PrependError("write struct stop error: ", err)
+	}
+	return nil
+}
+
+func (p *Endpoint) writeField1(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("ipv4", thrift.I32, 1); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:ipv4: ", p), err)
+	}
+	if err := oprot.WriteI32(int32(p.Ipv4)); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.ipv4 (1) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 1:ipv4: ", p), err)
+	}
+	return err
+}
+
+func (p *Endpoint) writeField2(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("port", thrift.I16, 2); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 2:port: ", p), err)
+	}
+	if err := oprot.WriteI16(int16(p.Port)); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.port (2) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 2:port: ", p), err)
+	}
+	return err
+}
+
+func (p *Endpoint) writeField3(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("service_name", thrift.STRING, 3); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 3:service_name: ", p), err)
+	}
+	if err := oprot.WriteString(string(p.ServiceName)); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.service_name (3) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 3:service_name: ", p), err)
+	}
+	return err
+}
+
+func (p *Endpoint) String() string {
+	if p == nil {
+		return "<nil>"
+	}
+	return fmt.Sprintf("Endpoint(%+v)", *p)
+}
+
+// An annotation is similar to a log statement. It includes a host field which
+// allows these events to be attributed properly, and also aggregatable.
+//
+// Attributes:
+//  - Timestamp: Microseconds from epoch.
+//
+// This value should use the most precise value possible. For example,
+// gettimeofday or syncing nanoTime against a tick of currentTimeMillis.
+//  - Value
+//  - Host: Always the host that recorded the event. By specifying the host you allow
+// rollup of all events (such as client requests to a service) by IP address.
+type Annotation struct {
+	Timestamp int64     `thrift:"timestamp,1" json:"timestamp"`
+	Value     string    `thrift:"value,2" json:"value"`
+	Host      *Endpoint `thrift:"host,3" json:"host,omitempty"`
+}
+
+func NewAnnotation() *Annotation {
+	return &Annotation{}
+}
+
+func (p *Annotation) GetTimestamp() int64 {
+	return p.Timestamp
+}
+
+func (p *Annotation) GetValue() string {
+	return p.Value
+}
+
+var Annotation_Host_DEFAULT *Endpoint
+
+func (p *Annotation) GetHost() *Endpoint {
+	if !p.IsSetHost() {
+		return Annotation_Host_DEFAULT
+	}
+	return p.Host
+}
+func (p *Annotation) IsSetHost() bool {
+	return p.Host != nil
+}
+
+func (p *Annotation) Read(iprot thrift.TProtocol) error {
+	if _, err := iprot.ReadStructBegin(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+	}
+
+	for {
+		_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
+		if err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+		}
+		if fieldTypeId == thrift.STOP {
+			break
+		}
+		switch fieldId {
+		case 1:
+			if err := p.readField1(iprot); err != nil {
+				return err
+			}
+		case 2:
+			if err := p.readField2(iprot); err != nil {
+				return err
+			}
+		case 3:
+			if err := p.readField3(iprot); err != nil {
+				return err
+			}
+		default:
+			if err := iprot.Skip(fieldTypeId); err != nil {
+				return err
+			}
+		}
+		if err := iprot.ReadFieldEnd(); err != nil {
+			return err
+		}
+	}
+	if err := iprot.ReadStructEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+	}
+	return nil
+}
+
+func (p *Annotation) readField1(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadI64(); err != nil {
+		return thrift.PrependError("error reading field 1: ", err)
+	} else {
+		p.Timestamp = v
+	}
+	return nil
+}
+
+func (p *Annotation) readField2(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadString(); err != nil {
+		return thrift.PrependError("error reading field 2: ", err)
+	} else {
+		p.Value = v
+	}
+	return nil
+}
+
+func (p *Annotation) readField3(iprot thrift.TProtocol) error {
+	p.Host = &Endpoint{}
+	if err := p.Host.Read(iprot); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", p.Host), err)
+	}
+	return nil
+}
+
+func (p *Annotation) Write(oprot thrift.TProtocol) error {
+	if err := oprot.WriteStructBegin("Annotation"); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
+	}
+	if err := p.writeField1(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField2(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField3(oprot); err != nil {
+		return err
+	}
+	if err := oprot.WriteFieldStop(); err != nil {
+		return thrift.PrependError("write field stop error: ", err)
+	}
+	if err := oprot.WriteStructEnd(); err != nil {
+		return thrift.PrependError("write struct stop error: ", err)
+	}
+	return nil
+}
+
+func (p *Annotation) writeField1(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("timestamp", thrift.I64, 1); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:timestamp: ", p), err)
+	}
+	if err := oprot.WriteI64(int64(p.Timestamp)); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.timestamp (1) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 1:timestamp: ", p), err)
+	}
+	return err
+}
+
+func (p *Annotation) writeField2(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("value", thrift.STRING, 2); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 2:value: ", p), err)
+	}
+	if err := oprot.WriteString(string(p.Value)); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.value (2) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 2:value: ", p), err)
+	}
+	return err
+}
+
+func (p *Annotation) writeField3(oprot thrift.TProtocol) (err error) {
+	if p.IsSetHost() {
+		if err := oprot.WriteFieldBegin("host", thrift.STRUCT, 3); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field begin error 3:host: ", p), err)
+		}
+		if err := p.Host.Write(oprot); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", p.Host), err)
+		}
+		if err := oprot.WriteFieldEnd(); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field end error 3:host: ", p), err)
+		}
+	}
+	return err
+}
+
+func (p *Annotation) String() string {
+	if p == nil {
+		return "<nil>"
+	}
+	return fmt.Sprintf("Annotation(%+v)", *p)
+}
+
+// Binary annotations are tags applied to a Span to give it context. For
+// example, a binary annotation of "http.uri" could the path to a resource in a
+// RPC call.
+//
+// Binary annotations of type STRING are always queryable, though more a
+// historical implementation detail than a structural concern.
+//
+// Binary annotations can repeat, and vary on the host. Similar to Annotation,
+// the host indicates who logged the event. This allows you to tell the
+// difference between the client and server side of the same key. For example,
+// the key "http.uri" might be different on the client and server side due to
+// rewriting, like "/api/v1/myresource" vs "/myresource. Via the host field,
+// you can see the different points of view, which often help in debugging.
+//
+// Attributes:
+//  - Key
+//  - Value
+//  - AnnotationType
+//  - Host: The host that recorded tag, which allows you to differentiate between
+// multiple tags with the same key. There are two exceptions to this.
+//
+// When the key is CLIENT_ADDR or SERVER_ADDR, host indicates the source or
+// destination of an RPC. This exception allows zipkin to display network
+// context of uninstrumented services, or clients such as web browsers.
+type BinaryAnnotation struct {
+	Key            string         `thrift:"key,1" json:"key"`
+	Value          []byte         `thrift:"value,2" json:"value"`
+	AnnotationType AnnotationType `thrift:"annotation_type,3" json:"annotation_type"`
+	Host           *Endpoint      `thrift:"host,4" json:"host,omitempty"`
+}
+
+func NewBinaryAnnotation() *BinaryAnnotation {
+	return &BinaryAnnotation{}
+}
+
+func (p *BinaryAnnotation) GetKey() string {
+	return p.Key
+}
+
+func (p *BinaryAnnotation) GetValue() []byte {
+	return p.Value
+}
+
+func (p *BinaryAnnotation) GetAnnotationType() AnnotationType {
+	return p.AnnotationType
+}
+
+var BinaryAnnotation_Host_DEFAULT *Endpoint
+
+func (p *BinaryAnnotation) GetHost() *Endpoint {
+	if !p.IsSetHost() {
+		return BinaryAnnotation_Host_DEFAULT
+	}
+	return p.Host
+}
+func (p *BinaryAnnotation) IsSetHost() bool {
+	return p.Host != nil
+}
+
+func (p *BinaryAnnotation) Read(iprot thrift.TProtocol) error {
+	if _, err := iprot.ReadStructBegin(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+	}
+
+	for {
+		_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
+		if err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+		}
+		if fieldTypeId == thrift.STOP {
+			break
+		}
+		switch fieldId {
+		case 1:
+			if err := p.readField1(iprot); err != nil {
+				return err
+			}
+		case 2:
+			if err := p.readField2(iprot); err != nil {
+				return err
+			}
+		case 3:
+			if err := p.readField3(iprot); err != nil {
+				return err
+			}
+		case 4:
+			if err := p.readField4(iprot); err != nil {
+				return err
+			}
+		default:
+			if err := iprot.Skip(fieldTypeId); err != nil {
+				return err
+			}
+		}
+		if err := iprot.ReadFieldEnd(); err != nil {
+			return err
+		}
+	}
+	if err := iprot.ReadStructEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+	}
+	return nil
+}
+
+func (p *BinaryAnnotation) readField1(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadString(); err != nil {
+		return thrift.PrependError("error reading field 1: ", err)
+	} else {
+		p.Key = v
+	}
+	return nil
+}
+
+func (p *BinaryAnnotation) readField2(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadBinary(); err != nil {
+		return thrift.PrependError("error reading field 2: ", err)
+	} else {
+		p.Value = v
+	}
+	return nil
+}
+
+func (p *BinaryAnnotation) readField3(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadI32(); err != nil {
+		return thrift.PrependError("error reading field 3: ", err)
+	} else {
+		temp := AnnotationType(v)
+		p.AnnotationType = temp
+	}
+	return nil
+}
+
+func (p *BinaryAnnotation) readField4(iprot thrift.TProtocol) error {
+	p.Host = &Endpoint{}
+	if err := p.Host.Read(iprot); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", p.Host), err)
+	}
+	return nil
+}
+
+func (p *BinaryAnnotation) Write(oprot thrift.TProtocol) error {
+	if err := oprot.WriteStructBegin("BinaryAnnotation"); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
+	}
+	if err := p.writeField1(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField2(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField3(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField4(oprot); err != nil {
+		return err
+	}
+	if err := oprot.WriteFieldStop(); err != nil {
+		return thrift.PrependError("write field stop error: ", err)
+	}
+	if err := oprot.WriteStructEnd(); err != nil {
+		return thrift.PrependError("write struct stop error: ", err)
+	}
+	return nil
+}
+
+func (p *BinaryAnnotation) writeField1(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("key", thrift.STRING, 1); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:key: ", p), err)
+	}
+	if err := oprot.WriteString(string(p.Key)); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.key (1) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 1:key: ", p), err)
+	}
+	return err
+}
+
+func (p *BinaryAnnotation) writeField2(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("value", thrift.STRING, 2); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 2:value: ", p), err)
+	}
+	if err := oprot.WriteBinary(p.Value); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.value (2) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 2:value: ", p), err)
+	}
+	return err
+}
+
+func (p *BinaryAnnotation) writeField3(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("annotation_type", thrift.I32, 3); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 3:annotation_type: ", p), err)
+	}
+	if err := oprot.WriteI32(int32(p.AnnotationType)); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.annotation_type (3) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 3:annotation_type: ", p), err)
+	}
+	return err
+}
+
+func (p *BinaryAnnotation) writeField4(oprot thrift.TProtocol) (err error) {
+	if p.IsSetHost() {
+		if err := oprot.WriteFieldBegin("host", thrift.STRUCT, 4); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field begin error 4:host: ", p), err)
+		}
+		if err := p.Host.Write(oprot); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", p.Host), err)
+		}
+		if err := oprot.WriteFieldEnd(); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field end error 4:host: ", p), err)
+		}
+	}
+	return err
+}
+
+func (p *BinaryAnnotation) String() string {
+	if p == nil {
+		return "<nil>"
+	}
+	return fmt.Sprintf("BinaryAnnotation(%+v)", *p)
+}
+
+// A trace is a series of spans (often RPC calls) which form a latency tree.
+//
+// The root span is where trace_id = id and parent_id = Nil. The root span is
+// usually the longest interval in the trace, starting with a SERVER_RECV
+// annotation and ending with a SERVER_SEND.
+//
+// Attributes:
+//  - TraceID
+//  - Name: Span name in lowercase, rpc method for example
+//
+// Conventionally, when the span name isn't known, name = "unknown".
+//  - ID
+//  - ParentID
+//  - Annotations
+//  - BinaryAnnotations
+//  - Debug
+//  - Timestamp: Microseconds from epoch of the creation of this span.
+//
+// This value should be set directly by instrumentation, using the most
+// precise value possible. For example, gettimeofday or syncing nanoTime
+// against a tick of currentTimeMillis.
+//
+// For compatibilty with instrumentation that precede this field, collectors
+// or span stores can derive this via Annotation.timestamp.
+// For example, SERVER_RECV.timestamp or CLIENT_SEND.timestamp.
+//
+// This field is optional for compatibility with old data: first-party span
+// stores are expected to support this at time of introduction.
+//  - Duration: Measurement of duration in microseconds, used to support queries.
+//
+// This value should be set directly, where possible. Doing so encourages
+// precise measurement decoupled from problems of clocks, such as skew or NTP
+// updates causing time to move backwards.
+//
+// For compatibilty with instrumentation that precede this field, collectors
+// or span stores can derive this by subtracting Annotation.timestamp.
+// For example, SERVER_SEND.timestamp - SERVER_RECV.timestamp.
+//
+// If this field is persisted as unset, zipkin will continue to work, except
+// duration query support will be implementation-specific. Similarly, setting
+// this field non-atomically is implementation-specific.
+//
+// This field is i64 vs i32 to support spans longer than 35 minutes.
+type Span struct {
+	TraceID int64 `thrift:"trace_id,1" json:"trace_id"`
+	// unused field # 2
+	Name        string        `thrift:"name,3" json:"name"`
+	ID          int64         `thrift:"id,4" json:"id"`
+	ParentID    *int64        `thrift:"parent_id,5" json:"parent_id,omitempty"`
+	Annotations []*Annotation `thrift:"annotations,6" json:"annotations"`
+	// unused field # 7
+	BinaryAnnotations []*BinaryAnnotation `thrift:"binary_annotations,8" json:"binary_annotations"`
+	Debug             bool                `thrift:"debug,9" json:"debug,omitempty"`
+	Timestamp         *int64              `thrift:"timestamp,10" json:"timestamp,omitempty"`
+	Duration          *int64              `thrift:"duration,11" json:"duration,omitempty"`
+}
+
+func NewSpan() *Span {
+	return &Span{}
+}
+
+func (p *Span) GetTraceID() int64 {
+	return p.TraceID
+}
+
+func (p *Span) GetName() string {
+	return p.Name
+}
+
+func (p *Span) GetID() int64 {
+	return p.ID
+}
+
+var Span_ParentID_DEFAULT int64
+
+func (p *Span) GetParentID() int64 {
+	if !p.IsSetParentID() {
+		return Span_ParentID_DEFAULT
+	}
+	return *p.ParentID
+}
+
+func (p *Span) GetAnnotations() []*Annotation {
+	return p.Annotations
+}
+
+func (p *Span) GetBinaryAnnotations() []*BinaryAnnotation {
+	return p.BinaryAnnotations
+}
+
+var Span_Debug_DEFAULT bool = false
+
+func (p *Span) GetDebug() bool {
+	return p.Debug
+}
+
+var Span_Timestamp_DEFAULT int64
+
+func (p *Span) GetTimestamp() int64 {
+	if !p.IsSetTimestamp() {
+		return Span_Timestamp_DEFAULT
+	}
+	return *p.Timestamp
+}
+
+var Span_Duration_DEFAULT int64
+
+func (p *Span) GetDuration() int64 {
+	if !p.IsSetDuration() {
+		return Span_Duration_DEFAULT
+	}
+	return *p.Duration
+}
+func (p *Span) IsSetParentID() bool {
+	return p.ParentID != nil
+}
+
+func (p *Span) IsSetDebug() bool {
+	return p.Debug != Span_Debug_DEFAULT
+}
+
+func (p *Span) IsSetTimestamp() bool {
+	return p.Timestamp != nil
+}
+
+func (p *Span) IsSetDuration() bool {
+	return p.Duration != nil
+}
+
+func (p *Span) Read(iprot thrift.TProtocol) error {
+	if _, err := iprot.ReadStructBegin(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+	}
+
+	for {
+		_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
+		if err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+		}
+		if fieldTypeId == thrift.STOP {
+			break
+		}
+		switch fieldId {
+		case 1:
+			if err := p.readField1(iprot); err != nil {
+				return err
+			}
+		case 3:
+			if err := p.readField3(iprot); err != nil {
+				return err
+			}
+		case 4:
+			if err := p.readField4(iprot); err != nil {
+				return err
+			}
+		case 5:
+			if err := p.readField5(iprot); err != nil {
+				return err
+			}
+		case 6:
+			if err := p.readField6(iprot); err != nil {
+				return err
+			}
+		case 8:
+			if err := p.readField8(iprot); err != nil {
+				return err
+			}
+		case 9:
+			if err := p.readField9(iprot); err != nil {
+				return err
+			}
+		case 10:
+			if err := p.readField10(iprot); err != nil {
+				return err
+			}
+		case 11:
+			if err := p.readField11(iprot); err != nil {
+				return err
+			}
+		default:
+			if err := iprot.Skip(fieldTypeId); err != nil {
+				return err
+			}
+		}
+		if err := iprot.ReadFieldEnd(); err != nil {
+			return err
+		}
+	}
+	if err := iprot.ReadStructEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+	}
+	return nil
+}
+
+func (p *Span) readField1(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadI64(); err != nil {
+		return thrift.PrependError("error reading field 1: ", err)
+	} else {
+		p.TraceID = v
+	}
+	return nil
+}
+
+func (p *Span) readField3(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadString(); err != nil {
+		return thrift.PrependError("error reading field 3: ", err)
+	} else {
+		p.Name = v
+	}
+	return nil
+}
+
+func (p *Span) readField4(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadI64(); err != nil {
+		return thrift.PrependError("error reading field 4: ", err)
+	} else {
+		p.ID = v
+	}
+	return nil
+}
+
+func (p *Span) readField5(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadI64(); err != nil {
+		return thrift.PrependError("error reading field 5: ", err)
+	} else {
+		p.ParentID = &v
+	}
+	return nil
+}
+
+func (p *Span) readField6(iprot thrift.TProtocol) error {
+	_, size, err := iprot.ReadListBegin()
+	if err != nil {
+		return thrift.PrependError("error reading list begin: ", err)
+	}
+	tSlice := make([]*Annotation, 0, size)
+	p.Annotations = tSlice
+	for i := 0; i < size; i++ {
+		_elem0 := &Annotation{}
+		if err := _elem0.Read(iprot); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", _elem0), err)
+		}
+		p.Annotations = append(p.Annotations, _elem0)
+	}
+	if err := iprot.ReadListEnd(); err != nil {
+		return thrift.PrependError("error reading list end: ", err)
+	}
+	return nil
+}
+
+func (p *Span) readField8(iprot thrift.TProtocol) error {
+	_, size, err := iprot.ReadListBegin()
+	if err != nil {
+		return thrift.PrependError("error reading list begin: ", err)
+	}
+	tSlice := make([]*BinaryAnnotation, 0, size)
+	p.BinaryAnnotations = tSlice
+	for i := 0; i < size; i++ {
+		_elem1 := &BinaryAnnotation{}
+		if err := _elem1.Read(iprot); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", _elem1), err)
+		}
+		p.BinaryAnnotations = append(p.BinaryAnnotations, _elem1)
+	}
+	if err := iprot.ReadListEnd(); err != nil {
+		return thrift.PrependError("error reading list end: ", err)
+	}
+	return nil
+}
+
+func (p *Span) readField9(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadBool(); err != nil {
+		return thrift.PrependError("error reading field 9: ", err)
+	} else {
+		p.Debug = v
+	}
+	return nil
+}
+
+func (p *Span) readField10(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadI64(); err != nil {
+		return thrift.PrependError("error reading field 10: ", err)
+	} else {
+		p.Timestamp = &v
+	}
+	return nil
+}
+
+func (p *Span) readField11(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadI64(); err != nil {
+		return thrift.PrependError("error reading field 11: ", err)
+	} else {
+		p.Duration = &v
+	}
+	return nil
+}
+
+func (p *Span) Write(oprot thrift.TProtocol) error {
+	if err := oprot.WriteStructBegin("Span"); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
+	}
+	if err := p.writeField1(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField3(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField4(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField5(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField6(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField8(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField9(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField10(oprot); err != nil {
+		return err
+	}
+	if err := p.writeField11(oprot); err != nil {
+		return err
+	}
+	if err := oprot.WriteFieldStop(); err != nil {
+		return thrift.PrependError("write field stop error: ", err)
+	}
+	if err := oprot.WriteStructEnd(); err != nil {
+		return thrift.PrependError("write struct stop error: ", err)
+	}
+	return nil
+}
+
+func (p *Span) writeField1(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("trace_id", thrift.I64, 1); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:trace_id: ", p), err)
+	}
+	if err := oprot.WriteI64(int64(p.TraceID)); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.trace_id (1) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 1:trace_id: ", p), err)
+	}
+	return err
+}
+
+func (p *Span) writeField3(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("name", thrift.STRING, 3); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 3:name: ", p), err)
+	}
+	if err := oprot.WriteString(string(p.Name)); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.name (3) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 3:name: ", p), err)
+	}
+	return err
+}
+
+func (p *Span) writeField4(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("id", thrift.I64, 4); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 4:id: ", p), err)
+	}
+	if err := oprot.WriteI64(int64(p.ID)); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.id (4) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 4:id: ", p), err)
+	}
+	return err
+}
+
+func (p *Span) writeField5(oprot thrift.TProtocol) (err error) {
+	if p.IsSetParentID() {
+		if err := oprot.WriteFieldBegin("parent_id", thrift.I64, 5); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field begin error 5:parent_id: ", p), err)
+		}
+		if err := oprot.WriteI64(int64(*p.ParentID)); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T.parent_id (5) field write error: ", p), err)
+		}
+		if err := oprot.WriteFieldEnd(); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field end error 5:parent_id: ", p), err)
+		}
+	}
+	return err
+}
+
+func (p *Span) writeField6(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("annotations", thrift.LIST, 6); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 6:annotations: ", p), err)
+	}
+	if err := oprot.WriteListBegin(thrift.STRUCT, len(p.Annotations)); err != nil {
+		return thrift.PrependError("error writing list begin: ", err)
+	}
+	for _, v := range p.Annotations {
+		if err := v.Write(oprot); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", v), err)
+		}
+	}
+	if err := oprot.WriteListEnd(); err != nil {
+		return thrift.PrependError("error writing list end: ", err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 6:annotations: ", p), err)
+	}
+	return err
+}
+
+func (p *Span) writeField8(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("binary_annotations", thrift.LIST, 8); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 8:binary_annotations: ", p), err)
+	}
+	if err := oprot.WriteListBegin(thrift.STRUCT, len(p.BinaryAnnotations)); err != nil {
+		return thrift.PrependError("error writing list begin: ", err)
+	}
+	for _, v := range p.BinaryAnnotations {
+		if err := v.Write(oprot); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", v), err)
+		}
+	}
+	if err := oprot.WriteListEnd(); err != nil {
+		return thrift.PrependError("error writing list end: ", err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 8:binary_annotations: ", p), err)
+	}
+	return err
+}
+
+func (p *Span) writeField9(oprot thrift.TProtocol) (err error) {
+	if p.IsSetDebug() {
+		if err := oprot.WriteFieldBegin("debug", thrift.BOOL, 9); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field begin error 9:debug: ", p), err)
+		}
+		if err := oprot.WriteBool(bool(p.Debug)); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T.debug (9) field write error: ", p), err)
+		}
+		if err := oprot.WriteFieldEnd(); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field end error 9:debug: ", p), err)
+		}
+	}
+	return err
+}
+
+func (p *Span) writeField10(oprot thrift.TProtocol) (err error) {
+	if p.IsSetTimestamp() {
+		if err := oprot.WriteFieldBegin("timestamp", thrift.I64, 10); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field begin error 10:timestamp: ", p), err)
+		}
+		if err := oprot.WriteI64(int64(*p.Timestamp)); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T.timestamp (10) field write error: ", p), err)
+		}
+		if err := oprot.WriteFieldEnd(); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field end error 10:timestamp: ", p), err)
+		}
+	}
+	return err
+}
+
+func (p *Span) writeField11(oprot thrift.TProtocol) (err error) {
+	if p.IsSetDuration() {
+		if err := oprot.WriteFieldBegin("duration", thrift.I64, 11); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field begin error 11:duration: ", p), err)
+		}
+		if err := oprot.WriteI64(int64(*p.Duration)); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T.duration (11) field write error: ", p), err)
+		}
+		if err := oprot.WriteFieldEnd(); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field end error 11:duration: ", p), err)
+		}
+	}
+	return err
+}
+
+func (p *Span) String() string {
+	if p == nil {
+		return "<nil>"
+	}
+	return fmt.Sprintf("Span(%+v)", *p)
+}
+
+// Attributes:
+//  - Ok
+type Response struct {
+	Ok bool `thrift:"ok,1,required" json:"ok"`
+}
+
+func NewResponse() *Response {
+	return &Response{}
+}
+
+func (p *Response) GetOk() bool {
+	return p.Ok
+}
+func (p *Response) Read(iprot thrift.TProtocol) error {
+	if _, err := iprot.ReadStructBegin(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+	}
+
+	var issetOk bool = false
+
+	for {
+		_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
+		if err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+		}
+		if fieldTypeId == thrift.STOP {
+			break
+		}
+		switch fieldId {
+		case 1:
+			if err := p.readField1(iprot); err != nil {
+				return err
+			}
+			issetOk = true
+		default:
+			if err := iprot.Skip(fieldTypeId); err != nil {
+				return err
+			}
+		}
+		if err := iprot.ReadFieldEnd(); err != nil {
+			return err
+		}
+	}
+	if err := iprot.ReadStructEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+	}
+	if !issetOk {
+		return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field Ok is not set"))
+	}
+	return nil
+}
+
+func (p *Response) readField1(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadBool(); err != nil {
+		return thrift.PrependError("error reading field 1: ", err)
+	} else {
+		p.Ok = v
+	}
+	return nil
+}
+
+func (p *Response) Write(oprot thrift.TProtocol) error {
+	if err := oprot.WriteStructBegin("Response"); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
+	}
+	if err := p.writeField1(oprot); err != nil {
+		return err
+	}
+	if err := oprot.WriteFieldStop(); err != nil {
+		return thrift.PrependError("write field stop error: ", err)
+	}
+	if err := oprot.WriteStructEnd(); err != nil {
+		return thrift.PrependError("write struct stop error: ", err)
+	}
+	return nil
+}
+
+func (p *Response) writeField1(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("ok", thrift.BOOL, 1); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:ok: ", p), err)
+	}
+	if err := oprot.WriteBool(bool(p.Ok)); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T.ok (1) field write error: ", p), err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 1:ok: ", p), err)
+	}
+	return err
+}
+
+func (p *Response) String() string {
+	if p == nil {
+		return "<nil>"
+	}
+	return fmt.Sprintf("Response(%+v)", *p)
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift-gen/zipkincore/zipkincollector.go b/vendor/github.com/uber/jaeger-client-go/thrift-gen/zipkincore/zipkincollector.go
new file mode 100644
index 000000000..417e883d0
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift-gen/zipkincore/zipkincollector.go
@@ -0,0 +1,446 @@
+// Autogenerated by Thrift Compiler (0.9.3)
+// DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
+
+package zipkincore
+
+import (
+	"bytes"
+	"fmt"
+	"github.com/uber/jaeger-client-go/thrift"
+)
+
+// (needed to ensure safety because of naive import list construction.)
+var _ = thrift.ZERO
+var _ = fmt.Printf
+var _ = bytes.Equal
+
+type ZipkinCollector interface {
+	// Parameters:
+	//  - Spans
+	SubmitZipkinBatch(spans []*Span) (r []*Response, err error)
+}
+
+type ZipkinCollectorClient struct {
+	Transport       thrift.TTransport
+	ProtocolFactory thrift.TProtocolFactory
+	InputProtocol   thrift.TProtocol
+	OutputProtocol  thrift.TProtocol
+	SeqId           int32
+}
+
+func NewZipkinCollectorClientFactory(t thrift.TTransport, f thrift.TProtocolFactory) *ZipkinCollectorClient {
+	return &ZipkinCollectorClient{Transport: t,
+		ProtocolFactory: f,
+		InputProtocol:   f.GetProtocol(t),
+		OutputProtocol:  f.GetProtocol(t),
+		SeqId:           0,
+	}
+}
+
+func NewZipkinCollectorClientProtocol(t thrift.TTransport, iprot thrift.TProtocol, oprot thrift.TProtocol) *ZipkinCollectorClient {
+	return &ZipkinCollectorClient{Transport: t,
+		ProtocolFactory: nil,
+		InputProtocol:   iprot,
+		OutputProtocol:  oprot,
+		SeqId:           0,
+	}
+}
+
+// Parameters:
+//  - Spans
+func (p *ZipkinCollectorClient) SubmitZipkinBatch(spans []*Span) (r []*Response, err error) {
+	if err = p.sendSubmitZipkinBatch(spans); err != nil {
+		return
+	}
+	return p.recvSubmitZipkinBatch()
+}
+
+func (p *ZipkinCollectorClient) sendSubmitZipkinBatch(spans []*Span) (err error) {
+	oprot := p.OutputProtocol
+	if oprot == nil {
+		oprot = p.ProtocolFactory.GetProtocol(p.Transport)
+		p.OutputProtocol = oprot
+	}
+	p.SeqId++
+	if err = oprot.WriteMessageBegin("submitZipkinBatch", thrift.CALL, p.SeqId); err != nil {
+		return
+	}
+	args := ZipkinCollectorSubmitZipkinBatchArgs{
+		Spans: spans,
+	}
+	if err = args.Write(oprot); err != nil {
+		return
+	}
+	if err = oprot.WriteMessageEnd(); err != nil {
+		return
+	}
+	return oprot.Flush()
+}
+
+func (p *ZipkinCollectorClient) recvSubmitZipkinBatch() (value []*Response, err error) {
+	iprot := p.InputProtocol
+	if iprot == nil {
+		iprot = p.ProtocolFactory.GetProtocol(p.Transport)
+		p.InputProtocol = iprot
+	}
+	method, mTypeId, seqId, err := iprot.ReadMessageBegin()
+	if err != nil {
+		return
+	}
+	if method != "submitZipkinBatch" {
+		err = thrift.NewTApplicationException(thrift.WRONG_METHOD_NAME, "submitZipkinBatch failed: wrong method name")
+		return
+	}
+	if p.SeqId != seqId {
+		err = thrift.NewTApplicationException(thrift.BAD_SEQUENCE_ID, "submitZipkinBatch failed: out of sequence response")
+		return
+	}
+	if mTypeId == thrift.EXCEPTION {
+		error2 := thrift.NewTApplicationException(thrift.UNKNOWN_APPLICATION_EXCEPTION, "Unknown Exception")
+		var error3 error
+		error3, err = error2.Read(iprot)
+		if err != nil {
+			return
+		}
+		if err = iprot.ReadMessageEnd(); err != nil {
+			return
+		}
+		err = error3
+		return
+	}
+	if mTypeId != thrift.REPLY {
+		err = thrift.NewTApplicationException(thrift.INVALID_MESSAGE_TYPE_EXCEPTION, "submitZipkinBatch failed: invalid message type")
+		return
+	}
+	result := ZipkinCollectorSubmitZipkinBatchResult{}
+	if err = result.Read(iprot); err != nil {
+		return
+	}
+	if err = iprot.ReadMessageEnd(); err != nil {
+		return
+	}
+	value = result.GetSuccess()
+	return
+}
+
+type ZipkinCollectorProcessor struct {
+	processorMap map[string]thrift.TProcessorFunction
+	handler      ZipkinCollector
+}
+
+func (p *ZipkinCollectorProcessor) AddToProcessorMap(key string, processor thrift.TProcessorFunction) {
+	p.processorMap[key] = processor
+}
+
+func (p *ZipkinCollectorProcessor) GetProcessorFunction(key string) (processor thrift.TProcessorFunction, ok bool) {
+	processor, ok = p.processorMap[key]
+	return processor, ok
+}
+
+func (p *ZipkinCollectorProcessor) ProcessorMap() map[string]thrift.TProcessorFunction {
+	return p.processorMap
+}
+
+func NewZipkinCollectorProcessor(handler ZipkinCollector) *ZipkinCollectorProcessor {
+
+	self4 := &ZipkinCollectorProcessor{handler: handler, processorMap: make(map[string]thrift.TProcessorFunction)}
+	self4.processorMap["submitZipkinBatch"] = &zipkinCollectorProcessorSubmitZipkinBatch{handler: handler}
+	return self4
+}
+
+func (p *ZipkinCollectorProcessor) Process(iprot, oprot thrift.TProtocol) (success bool, err thrift.TException) {
+	name, _, seqId, err := iprot.ReadMessageBegin()
+	if err != nil {
+		return false, err
+	}
+	if processor, ok := p.GetProcessorFunction(name); ok {
+		return processor.Process(seqId, iprot, oprot)
+	}
+	iprot.Skip(thrift.STRUCT)
+	iprot.ReadMessageEnd()
+	x5 := thrift.NewTApplicationException(thrift.UNKNOWN_METHOD, "Unknown function "+name)
+	oprot.WriteMessageBegin(name, thrift.EXCEPTION, seqId)
+	x5.Write(oprot)
+	oprot.WriteMessageEnd()
+	oprot.Flush()
+	return false, x5
+
+}
+
+type zipkinCollectorProcessorSubmitZipkinBatch struct {
+	handler ZipkinCollector
+}
+
+func (p *zipkinCollectorProcessorSubmitZipkinBatch) Process(seqId int32, iprot, oprot thrift.TProtocol) (success bool, err thrift.TException) {
+	args := ZipkinCollectorSubmitZipkinBatchArgs{}
+	if err = args.Read(iprot); err != nil {
+		iprot.ReadMessageEnd()
+		x := thrift.NewTApplicationException(thrift.PROTOCOL_ERROR, err.Error())
+		oprot.WriteMessageBegin("submitZipkinBatch", thrift.EXCEPTION, seqId)
+		x.Write(oprot)
+		oprot.WriteMessageEnd()
+		oprot.Flush()
+		return false, err
+	}
+
+	iprot.ReadMessageEnd()
+	result := ZipkinCollectorSubmitZipkinBatchResult{}
+	var retval []*Response
+	var err2 error
+	if retval, err2 = p.handler.SubmitZipkinBatch(args.Spans); err2 != nil {
+		x := thrift.NewTApplicationException(thrift.INTERNAL_ERROR, "Internal error processing submitZipkinBatch: "+err2.Error())
+		oprot.WriteMessageBegin("submitZipkinBatch", thrift.EXCEPTION, seqId)
+		x.Write(oprot)
+		oprot.WriteMessageEnd()
+		oprot.Flush()
+		return true, err2
+	} else {
+		result.Success = retval
+	}
+	if err2 = oprot.WriteMessageBegin("submitZipkinBatch", thrift.REPLY, seqId); err2 != nil {
+		err = err2
+	}
+	if err2 = result.Write(oprot); err == nil && err2 != nil {
+		err = err2
+	}
+	if err2 = oprot.WriteMessageEnd(); err == nil && err2 != nil {
+		err = err2
+	}
+	if err2 = oprot.Flush(); err == nil && err2 != nil {
+		err = err2
+	}
+	if err != nil {
+		return
+	}
+	return true, err
+}
+
+// HELPER FUNCTIONS AND STRUCTURES
+
+// Attributes:
+//  - Spans
+type ZipkinCollectorSubmitZipkinBatchArgs struct {
+	Spans []*Span `thrift:"spans,1" json:"spans"`
+}
+
+func NewZipkinCollectorSubmitZipkinBatchArgs() *ZipkinCollectorSubmitZipkinBatchArgs {
+	return &ZipkinCollectorSubmitZipkinBatchArgs{}
+}
+
+func (p *ZipkinCollectorSubmitZipkinBatchArgs) GetSpans() []*Span {
+	return p.Spans
+}
+func (p *ZipkinCollectorSubmitZipkinBatchArgs) Read(iprot thrift.TProtocol) error {
+	if _, err := iprot.ReadStructBegin(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+	}
+
+	for {
+		_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
+		if err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+		}
+		if fieldTypeId == thrift.STOP {
+			break
+		}
+		switch fieldId {
+		case 1:
+			if err := p.readField1(iprot); err != nil {
+				return err
+			}
+		default:
+			if err := iprot.Skip(fieldTypeId); err != nil {
+				return err
+			}
+		}
+		if err := iprot.ReadFieldEnd(); err != nil {
+			return err
+		}
+	}
+	if err := iprot.ReadStructEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+	}
+	return nil
+}
+
+func (p *ZipkinCollectorSubmitZipkinBatchArgs) readField1(iprot thrift.TProtocol) error {
+	_, size, err := iprot.ReadListBegin()
+	if err != nil {
+		return thrift.PrependError("error reading list begin: ", err)
+	}
+	tSlice := make([]*Span, 0, size)
+	p.Spans = tSlice
+	for i := 0; i < size; i++ {
+		_elem6 := &Span{}
+		if err := _elem6.Read(iprot); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", _elem6), err)
+		}
+		p.Spans = append(p.Spans, _elem6)
+	}
+	if err := iprot.ReadListEnd(); err != nil {
+		return thrift.PrependError("error reading list end: ", err)
+	}
+	return nil
+}
+
+func (p *ZipkinCollectorSubmitZipkinBatchArgs) Write(oprot thrift.TProtocol) error {
+	if err := oprot.WriteStructBegin("submitZipkinBatch_args"); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
+	}
+	if err := p.writeField1(oprot); err != nil {
+		return err
+	}
+	if err := oprot.WriteFieldStop(); err != nil {
+		return thrift.PrependError("write field stop error: ", err)
+	}
+	if err := oprot.WriteStructEnd(); err != nil {
+		return thrift.PrependError("write struct stop error: ", err)
+	}
+	return nil
+}
+
+func (p *ZipkinCollectorSubmitZipkinBatchArgs) writeField1(oprot thrift.TProtocol) (err error) {
+	if err := oprot.WriteFieldBegin("spans", thrift.LIST, 1); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:spans: ", p), err)
+	}
+	if err := oprot.WriteListBegin(thrift.STRUCT, len(p.Spans)); err != nil {
+		return thrift.PrependError("error writing list begin: ", err)
+	}
+	for _, v := range p.Spans {
+		if err := v.Write(oprot); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", v), err)
+		}
+	}
+	if err := oprot.WriteListEnd(); err != nil {
+		return thrift.PrependError("error writing list end: ", err)
+	}
+	if err := oprot.WriteFieldEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write field end error 1:spans: ", p), err)
+	}
+	return err
+}
+
+func (p *ZipkinCollectorSubmitZipkinBatchArgs) String() string {
+	if p == nil {
+		return "<nil>"
+	}
+	return fmt.Sprintf("ZipkinCollectorSubmitZipkinBatchArgs(%+v)", *p)
+}
+
+// Attributes:
+//  - Success
+type ZipkinCollectorSubmitZipkinBatchResult struct {
+	Success []*Response `thrift:"success,0" json:"success,omitempty"`
+}
+
+func NewZipkinCollectorSubmitZipkinBatchResult() *ZipkinCollectorSubmitZipkinBatchResult {
+	return &ZipkinCollectorSubmitZipkinBatchResult{}
+}
+
+var ZipkinCollectorSubmitZipkinBatchResult_Success_DEFAULT []*Response
+
+func (p *ZipkinCollectorSubmitZipkinBatchResult) GetSuccess() []*Response {
+	return p.Success
+}
+func (p *ZipkinCollectorSubmitZipkinBatchResult) IsSetSuccess() bool {
+	return p.Success != nil
+}
+
+func (p *ZipkinCollectorSubmitZipkinBatchResult) Read(iprot thrift.TProtocol) error {
+	if _, err := iprot.ReadStructBegin(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+	}
+
+	for {
+		_, fieldTypeId, fieldId, err := iprot.ReadFieldBegin()
+		if err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+		}
+		if fieldTypeId == thrift.STOP {
+			break
+		}
+		switch fieldId {
+		case 0:
+			if err := p.readField0(iprot); err != nil {
+				return err
+			}
+		default:
+			if err := iprot.Skip(fieldTypeId); err != nil {
+				return err
+			}
+		}
+		if err := iprot.ReadFieldEnd(); err != nil {
+			return err
+		}
+	}
+	if err := iprot.ReadStructEnd(); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+	}
+	return nil
+}
+
+func (p *ZipkinCollectorSubmitZipkinBatchResult) readField0(iprot thrift.TProtocol) error {
+	_, size, err := iprot.ReadListBegin()
+	if err != nil {
+		return thrift.PrependError("error reading list begin: ", err)
+	}
+	tSlice := make([]*Response, 0, size)
+	p.Success = tSlice
+	for i := 0; i < size; i++ {
+		_elem7 := &Response{}
+		if err := _elem7.Read(iprot); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", _elem7), err)
+		}
+		p.Success = append(p.Success, _elem7)
+	}
+	if err := iprot.ReadListEnd(); err != nil {
+		return thrift.PrependError("error reading list end: ", err)
+	}
+	return nil
+}
+
+func (p *ZipkinCollectorSubmitZipkinBatchResult) Write(oprot thrift.TProtocol) error {
+	if err := oprot.WriteStructBegin("submitZipkinBatch_result"); err != nil {
+		return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
+	}
+	if err := p.writeField0(oprot); err != nil {
+		return err
+	}
+	if err := oprot.WriteFieldStop(); err != nil {
+		return thrift.PrependError("write field stop error: ", err)
+	}
+	if err := oprot.WriteStructEnd(); err != nil {
+		return thrift.PrependError("write struct stop error: ", err)
+	}
+	return nil
+}
+
+func (p *ZipkinCollectorSubmitZipkinBatchResult) writeField0(oprot thrift.TProtocol) (err error) {
+	if p.IsSetSuccess() {
+		if err := oprot.WriteFieldBegin("success", thrift.LIST, 0); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field begin error 0:success: ", p), err)
+		}
+		if err := oprot.WriteListBegin(thrift.STRUCT, len(p.Success)); err != nil {
+			return thrift.PrependError("error writing list begin: ", err)
+		}
+		for _, v := range p.Success {
+			if err := v.Write(oprot); err != nil {
+				return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", v), err)
+			}
+		}
+		if err := oprot.WriteListEnd(); err != nil {
+			return thrift.PrependError("error writing list end: ", err)
+		}
+		if err := oprot.WriteFieldEnd(); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field end error 0:success: ", p), err)
+		}
+	}
+	return err
+}
+
+func (p *ZipkinCollectorSubmitZipkinBatchResult) String() string {
+	if p == nil {
+		return "<nil>"
+	}
+	return fmt.Sprintf("ZipkinCollectorSubmitZipkinBatchResult(%+v)", *p)
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/README.md b/vendor/github.com/uber/jaeger-client-go/thrift/README.md
new file mode 100644
index 000000000..1d8e642e0
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/README.md
@@ -0,0 +1,7 @@
+# Apache Thrift
+
+This is a partial copy of Apache Thrift v0.10 (https://github.com/apache/thrift/commit/b2a4d4ae21c789b689dd162deb819665567f481c).
+
+It is vendored code to avoid compatibility issues introduced in Thrift  v0.11.
+
+See https://github.com/jaegertracing/jaeger-client-go/pull/303.
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/application_exception.go b/vendor/github.com/uber/jaeger-client-go/thrift/application_exception.go
new file mode 100644
index 000000000..6655cc5a9
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/application_exception.go
@@ -0,0 +1,142 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+const (
+	UNKNOWN_APPLICATION_EXCEPTION  = 0
+	UNKNOWN_METHOD                 = 1
+	INVALID_MESSAGE_TYPE_EXCEPTION = 2
+	WRONG_METHOD_NAME              = 3
+	BAD_SEQUENCE_ID                = 4
+	MISSING_RESULT                 = 5
+	INTERNAL_ERROR                 = 6
+	PROTOCOL_ERROR                 = 7
+)
+
+// Application level Thrift exception
+type TApplicationException interface {
+	TException
+	TypeId() int32
+	Read(iprot TProtocol) (TApplicationException, error)
+	Write(oprot TProtocol) error
+}
+
+type tApplicationException struct {
+	message string
+	type_   int32
+}
+
+func (e tApplicationException) Error() string {
+	return e.message
+}
+
+func NewTApplicationException(type_ int32, message string) TApplicationException {
+	return &tApplicationException{message, type_}
+}
+
+func (p *tApplicationException) TypeId() int32 {
+	return p.type_
+}
+
+func (p *tApplicationException) Read(iprot TProtocol) (TApplicationException, error) {
+	_, err := iprot.ReadStructBegin()
+	if err != nil {
+		return nil, err
+	}
+
+	message := ""
+	type_ := int32(UNKNOWN_APPLICATION_EXCEPTION)
+
+	for {
+		_, ttype, id, err := iprot.ReadFieldBegin()
+		if err != nil {
+			return nil, err
+		}
+		if ttype == STOP {
+			break
+		}
+		switch id {
+		case 1:
+			if ttype == STRING {
+				if message, err = iprot.ReadString(); err != nil {
+					return nil, err
+				}
+			} else {
+				if err = SkipDefaultDepth(iprot, ttype); err != nil {
+					return nil, err
+				}
+			}
+		case 2:
+			if ttype == I32 {
+				if type_, err = iprot.ReadI32(); err != nil {
+					return nil, err
+				}
+			} else {
+				if err = SkipDefaultDepth(iprot, ttype); err != nil {
+					return nil, err
+				}
+			}
+		default:
+			if err = SkipDefaultDepth(iprot, ttype); err != nil {
+				return nil, err
+			}
+		}
+		if err = iprot.ReadFieldEnd(); err != nil {
+			return nil, err
+		}
+	}
+	return NewTApplicationException(type_, message), iprot.ReadStructEnd()
+}
+
+func (p *tApplicationException) Write(oprot TProtocol) (err error) {
+	err = oprot.WriteStructBegin("TApplicationException")
+	if len(p.Error()) > 0 {
+		err = oprot.WriteFieldBegin("message", STRING, 1)
+		if err != nil {
+			return
+		}
+		err = oprot.WriteString(p.Error())
+		if err != nil {
+			return
+		}
+		err = oprot.WriteFieldEnd()
+		if err != nil {
+			return
+		}
+	}
+	err = oprot.WriteFieldBegin("type", I32, 2)
+	if err != nil {
+		return
+	}
+	err = oprot.WriteI32(p.type_)
+	if err != nil {
+		return
+	}
+	err = oprot.WriteFieldEnd()
+	if err != nil {
+		return
+	}
+	err = oprot.WriteFieldStop()
+	if err != nil {
+		return
+	}
+	err = oprot.WriteStructEnd()
+	return
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/binary_protocol.go b/vendor/github.com/uber/jaeger-client-go/thrift/binary_protocol.go
new file mode 100644
index 000000000..690d34111
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/binary_protocol.go
@@ -0,0 +1,514 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"bytes"
+	"encoding/binary"
+	"errors"
+	"fmt"
+	"io"
+	"math"
+)
+
+type TBinaryProtocol struct {
+	trans         TRichTransport
+	origTransport TTransport
+	reader        io.Reader
+	writer        io.Writer
+	strictRead    bool
+	strictWrite   bool
+	buffer        [64]byte
+}
+
+type TBinaryProtocolFactory struct {
+	strictRead  bool
+	strictWrite bool
+}
+
+func NewTBinaryProtocolTransport(t TTransport) *TBinaryProtocol {
+	return NewTBinaryProtocol(t, false, true)
+}
+
+func NewTBinaryProtocol(t TTransport, strictRead, strictWrite bool) *TBinaryProtocol {
+	p := &TBinaryProtocol{origTransport: t, strictRead: strictRead, strictWrite: strictWrite}
+	if et, ok := t.(TRichTransport); ok {
+		p.trans = et
+	} else {
+		p.trans = NewTRichTransport(t)
+	}
+	p.reader = p.trans
+	p.writer = p.trans
+	return p
+}
+
+func NewTBinaryProtocolFactoryDefault() *TBinaryProtocolFactory {
+	return NewTBinaryProtocolFactory(false, true)
+}
+
+func NewTBinaryProtocolFactory(strictRead, strictWrite bool) *TBinaryProtocolFactory {
+	return &TBinaryProtocolFactory{strictRead: strictRead, strictWrite: strictWrite}
+}
+
+func (p *TBinaryProtocolFactory) GetProtocol(t TTransport) TProtocol {
+	return NewTBinaryProtocol(t, p.strictRead, p.strictWrite)
+}
+
+/**
+ * Writing Methods
+ */
+
+func (p *TBinaryProtocol) WriteMessageBegin(name string, typeId TMessageType, seqId int32) error {
+	if p.strictWrite {
+		version := uint32(VERSION_1) | uint32(typeId)
+		e := p.WriteI32(int32(version))
+		if e != nil {
+			return e
+		}
+		e = p.WriteString(name)
+		if e != nil {
+			return e
+		}
+		e = p.WriteI32(seqId)
+		return e
+	} else {
+		e := p.WriteString(name)
+		if e != nil {
+			return e
+		}
+		e = p.WriteByte(int8(typeId))
+		if e != nil {
+			return e
+		}
+		e = p.WriteI32(seqId)
+		return e
+	}
+	return nil
+}
+
+func (p *TBinaryProtocol) WriteMessageEnd() error {
+	return nil
+}
+
+func (p *TBinaryProtocol) WriteStructBegin(name string) error {
+	return nil
+}
+
+func (p *TBinaryProtocol) WriteStructEnd() error {
+	return nil
+}
+
+func (p *TBinaryProtocol) WriteFieldBegin(name string, typeId TType, id int16) error {
+	e := p.WriteByte(int8(typeId))
+	if e != nil {
+		return e
+	}
+	e = p.WriteI16(id)
+	return e
+}
+
+func (p *TBinaryProtocol) WriteFieldEnd() error {
+	return nil
+}
+
+func (p *TBinaryProtocol) WriteFieldStop() error {
+	e := p.WriteByte(STOP)
+	return e
+}
+
+func (p *TBinaryProtocol) WriteMapBegin(keyType TType, valueType TType, size int) error {
+	e := p.WriteByte(int8(keyType))
+	if e != nil {
+		return e
+	}
+	e = p.WriteByte(int8(valueType))
+	if e != nil {
+		return e
+	}
+	e = p.WriteI32(int32(size))
+	return e
+}
+
+func (p *TBinaryProtocol) WriteMapEnd() error {
+	return nil
+}
+
+func (p *TBinaryProtocol) WriteListBegin(elemType TType, size int) error {
+	e := p.WriteByte(int8(elemType))
+	if e != nil {
+		return e
+	}
+	e = p.WriteI32(int32(size))
+	return e
+}
+
+func (p *TBinaryProtocol) WriteListEnd() error {
+	return nil
+}
+
+func (p *TBinaryProtocol) WriteSetBegin(elemType TType, size int) error {
+	e := p.WriteByte(int8(elemType))
+	if e != nil {
+		return e
+	}
+	e = p.WriteI32(int32(size))
+	return e
+}
+
+func (p *TBinaryProtocol) WriteSetEnd() error {
+	return nil
+}
+
+func (p *TBinaryProtocol) WriteBool(value bool) error {
+	if value {
+		return p.WriteByte(1)
+	}
+	return p.WriteByte(0)
+}
+
+func (p *TBinaryProtocol) WriteByte(value int8) error {
+	e := p.trans.WriteByte(byte(value))
+	return NewTProtocolException(e)
+}
+
+func (p *TBinaryProtocol) WriteI16(value int16) error {
+	v := p.buffer[0:2]
+	binary.BigEndian.PutUint16(v, uint16(value))
+	_, e := p.writer.Write(v)
+	return NewTProtocolException(e)
+}
+
+func (p *TBinaryProtocol) WriteI32(value int32) error {
+	v := p.buffer[0:4]
+	binary.BigEndian.PutUint32(v, uint32(value))
+	_, e := p.writer.Write(v)
+	return NewTProtocolException(e)
+}
+
+func (p *TBinaryProtocol) WriteI64(value int64) error {
+	v := p.buffer[0:8]
+	binary.BigEndian.PutUint64(v, uint64(value))
+	_, err := p.writer.Write(v)
+	return NewTProtocolException(err)
+}
+
+func (p *TBinaryProtocol) WriteDouble(value float64) error {
+	return p.WriteI64(int64(math.Float64bits(value)))
+}
+
+func (p *TBinaryProtocol) WriteString(value string) error {
+	e := p.WriteI32(int32(len(value)))
+	if e != nil {
+		return e
+	}
+	_, err := p.trans.WriteString(value)
+	return NewTProtocolException(err)
+}
+
+func (p *TBinaryProtocol) WriteBinary(value []byte) error {
+	e := p.WriteI32(int32(len(value)))
+	if e != nil {
+		return e
+	}
+	_, err := p.writer.Write(value)
+	return NewTProtocolException(err)
+}
+
+/**
+ * Reading methods
+ */
+
+func (p *TBinaryProtocol) ReadMessageBegin() (name string, typeId TMessageType, seqId int32, err error) {
+	size, e := p.ReadI32()
+	if e != nil {
+		return "", typeId, 0, NewTProtocolException(e)
+	}
+	if size < 0 {
+		typeId = TMessageType(size & 0x0ff)
+		version := int64(int64(size) & VERSION_MASK)
+		if version != VERSION_1 {
+			return name, typeId, seqId, NewTProtocolExceptionWithType(BAD_VERSION, fmt.Errorf("Bad version in ReadMessageBegin"))
+		}
+		name, e = p.ReadString()
+		if e != nil {
+			return name, typeId, seqId, NewTProtocolException(e)
+		}
+		seqId, e = p.ReadI32()
+		if e != nil {
+			return name, typeId, seqId, NewTProtocolException(e)
+		}
+		return name, typeId, seqId, nil
+	}
+	if p.strictRead {
+		return name, typeId, seqId, NewTProtocolExceptionWithType(BAD_VERSION, fmt.Errorf("Missing version in ReadMessageBegin"))
+	}
+	name, e2 := p.readStringBody(size)
+	if e2 != nil {
+		return name, typeId, seqId, e2
+	}
+	b, e3 := p.ReadByte()
+	if e3 != nil {
+		return name, typeId, seqId, e3
+	}
+	typeId = TMessageType(b)
+	seqId, e4 := p.ReadI32()
+	if e4 != nil {
+		return name, typeId, seqId, e4
+	}
+	return name, typeId, seqId, nil
+}
+
+func (p *TBinaryProtocol) ReadMessageEnd() error {
+	return nil
+}
+
+func (p *TBinaryProtocol) ReadStructBegin() (name string, err error) {
+	return
+}
+
+func (p *TBinaryProtocol) ReadStructEnd() error {
+	return nil
+}
+
+func (p *TBinaryProtocol) ReadFieldBegin() (name string, typeId TType, seqId int16, err error) {
+	t, err := p.ReadByte()
+	typeId = TType(t)
+	if err != nil {
+		return name, typeId, seqId, err
+	}
+	if t != STOP {
+		seqId, err = p.ReadI16()
+	}
+	return name, typeId, seqId, err
+}
+
+func (p *TBinaryProtocol) ReadFieldEnd() error {
+	return nil
+}
+
+var invalidDataLength = NewTProtocolExceptionWithType(INVALID_DATA, errors.New("Invalid data length"))
+
+func (p *TBinaryProtocol) ReadMapBegin() (kType, vType TType, size int, err error) {
+	k, e := p.ReadByte()
+	if e != nil {
+		err = NewTProtocolException(e)
+		return
+	}
+	kType = TType(k)
+	v, e := p.ReadByte()
+	if e != nil {
+		err = NewTProtocolException(e)
+		return
+	}
+	vType = TType(v)
+	size32, e := p.ReadI32()
+	if e != nil {
+		err = NewTProtocolException(e)
+		return
+	}
+	if size32 < 0 {
+		err = invalidDataLength
+		return
+	}
+	size = int(size32)
+	return kType, vType, size, nil
+}
+
+func (p *TBinaryProtocol) ReadMapEnd() error {
+	return nil
+}
+
+func (p *TBinaryProtocol) ReadListBegin() (elemType TType, size int, err error) {
+	b, e := p.ReadByte()
+	if e != nil {
+		err = NewTProtocolException(e)
+		return
+	}
+	elemType = TType(b)
+	size32, e := p.ReadI32()
+	if e != nil {
+		err = NewTProtocolException(e)
+		return
+	}
+	if size32 < 0 {
+		err = invalidDataLength
+		return
+	}
+	size = int(size32)
+
+	return
+}
+
+func (p *TBinaryProtocol) ReadListEnd() error {
+	return nil
+}
+
+func (p *TBinaryProtocol) ReadSetBegin() (elemType TType, size int, err error) {
+	b, e := p.ReadByte()
+	if e != nil {
+		err = NewTProtocolException(e)
+		return
+	}
+	elemType = TType(b)
+	size32, e := p.ReadI32()
+	if e != nil {
+		err = NewTProtocolException(e)
+		return
+	}
+	if size32 < 0 {
+		err = invalidDataLength
+		return
+	}
+	size = int(size32)
+	return elemType, size, nil
+}
+
+func (p *TBinaryProtocol) ReadSetEnd() error {
+	return nil
+}
+
+func (p *TBinaryProtocol) ReadBool() (bool, error) {
+	b, e := p.ReadByte()
+	v := true
+	if b != 1 {
+		v = false
+	}
+	return v, e
+}
+
+func (p *TBinaryProtocol) ReadByte() (int8, error) {
+	v, err := p.trans.ReadByte()
+	return int8(v), err
+}
+
+func (p *TBinaryProtocol) ReadI16() (value int16, err error) {
+	buf := p.buffer[0:2]
+	err = p.readAll(buf)
+	value = int16(binary.BigEndian.Uint16(buf))
+	return value, err
+}
+
+func (p *TBinaryProtocol) ReadI32() (value int32, err error) {
+	buf := p.buffer[0:4]
+	err = p.readAll(buf)
+	value = int32(binary.BigEndian.Uint32(buf))
+	return value, err
+}
+
+func (p *TBinaryProtocol) ReadI64() (value int64, err error) {
+	buf := p.buffer[0:8]
+	err = p.readAll(buf)
+	value = int64(binary.BigEndian.Uint64(buf))
+	return value, err
+}
+
+func (p *TBinaryProtocol) ReadDouble() (value float64, err error) {
+	buf := p.buffer[0:8]
+	err = p.readAll(buf)
+	value = math.Float64frombits(binary.BigEndian.Uint64(buf))
+	return value, err
+}
+
+func (p *TBinaryProtocol) ReadString() (value string, err error) {
+	size, e := p.ReadI32()
+	if e != nil {
+		return "", e
+	}
+	if size < 0 {
+		err = invalidDataLength
+		return
+	}
+
+	return p.readStringBody(size)
+}
+
+func (p *TBinaryProtocol) ReadBinary() ([]byte, error) {
+	size, e := p.ReadI32()
+	if e != nil {
+		return nil, e
+	}
+	if size < 0 {
+		return nil, invalidDataLength
+	}
+	if uint64(size) > p.trans.RemainingBytes() {
+		return nil, invalidDataLength
+	}
+
+	isize := int(size)
+	buf := make([]byte, isize)
+	_, err := io.ReadFull(p.trans, buf)
+	return buf, NewTProtocolException(err)
+}
+
+func (p *TBinaryProtocol) Flush() (err error) {
+	return NewTProtocolException(p.trans.Flush())
+}
+
+func (p *TBinaryProtocol) Skip(fieldType TType) (err error) {
+	return SkipDefaultDepth(p, fieldType)
+}
+
+func (p *TBinaryProtocol) Transport() TTransport {
+	return p.origTransport
+}
+
+func (p *TBinaryProtocol) readAll(buf []byte) error {
+	_, err := io.ReadFull(p.reader, buf)
+	return NewTProtocolException(err)
+}
+
+const readLimit = 32768
+
+func (p *TBinaryProtocol) readStringBody(size int32) (value string, err error) {
+	if size < 0 {
+		return "", nil
+	}
+	if uint64(size) > p.trans.RemainingBytes() {
+		return "", invalidDataLength
+	}
+
+	var (
+		buf bytes.Buffer
+		e   error
+		b   []byte
+	)
+
+	switch {
+	case int(size) <= len(p.buffer):
+		b = p.buffer[:size] // avoids allocation for small reads
+	case int(size) < readLimit:
+		b = make([]byte, size)
+	default:
+		b = make([]byte, readLimit)
+	}
+
+	for size > 0 {
+		_, e = io.ReadFull(p.trans, b)
+		buf.Write(b)
+		if e != nil {
+			break
+		}
+		size -= readLimit
+		if size < readLimit && size > 0 {
+			b = b[:size]
+		}
+	}
+	return buf.String(), NewTProtocolException(e)
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/compact_protocol.go b/vendor/github.com/uber/jaeger-client-go/thrift/compact_protocol.go
new file mode 100644
index 000000000..b9299f2fa
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/compact_protocol.go
@@ -0,0 +1,815 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"encoding/binary"
+	"fmt"
+	"io"
+	"math"
+)
+
+const (
+	COMPACT_PROTOCOL_ID       = 0x082
+	COMPACT_VERSION           = 1
+	COMPACT_VERSION_MASK      = 0x1f
+	COMPACT_TYPE_MASK         = 0x0E0
+	COMPACT_TYPE_BITS         = 0x07
+	COMPACT_TYPE_SHIFT_AMOUNT = 5
+)
+
+type tCompactType byte
+
+const (
+	COMPACT_BOOLEAN_TRUE  = 0x01
+	COMPACT_BOOLEAN_FALSE = 0x02
+	COMPACT_BYTE          = 0x03
+	COMPACT_I16           = 0x04
+	COMPACT_I32           = 0x05
+	COMPACT_I64           = 0x06
+	COMPACT_DOUBLE        = 0x07
+	COMPACT_BINARY        = 0x08
+	COMPACT_LIST          = 0x09
+	COMPACT_SET           = 0x0A
+	COMPACT_MAP           = 0x0B
+	COMPACT_STRUCT        = 0x0C
+)
+
+var (
+	ttypeToCompactType map[TType]tCompactType
+)
+
+func init() {
+	ttypeToCompactType = map[TType]tCompactType{
+		STOP:   STOP,
+		BOOL:   COMPACT_BOOLEAN_TRUE,
+		BYTE:   COMPACT_BYTE,
+		I16:    COMPACT_I16,
+		I32:    COMPACT_I32,
+		I64:    COMPACT_I64,
+		DOUBLE: COMPACT_DOUBLE,
+		STRING: COMPACT_BINARY,
+		LIST:   COMPACT_LIST,
+		SET:    COMPACT_SET,
+		MAP:    COMPACT_MAP,
+		STRUCT: COMPACT_STRUCT,
+	}
+}
+
+type TCompactProtocolFactory struct{}
+
+func NewTCompactProtocolFactory() *TCompactProtocolFactory {
+	return &TCompactProtocolFactory{}
+}
+
+func (p *TCompactProtocolFactory) GetProtocol(trans TTransport) TProtocol {
+	return NewTCompactProtocol(trans)
+}
+
+type TCompactProtocol struct {
+	trans         TRichTransport
+	origTransport TTransport
+
+	// Used to keep track of the last field for the current and previous structs,
+	// so we can do the delta stuff.
+	lastField   []int
+	lastFieldId int
+
+	// If we encounter a boolean field begin, save the TField here so it can
+	// have the value incorporated.
+	booleanFieldName    string
+	booleanFieldId      int16
+	booleanFieldPending bool
+
+	// If we read a field header, and it's a boolean field, save the boolean
+	// value here so that readBool can use it.
+	boolValue          bool
+	boolValueIsNotNull bool
+	buffer             [64]byte
+}
+
+// Create a TCompactProtocol given a TTransport
+func NewTCompactProtocol(trans TTransport) *TCompactProtocol {
+	p := &TCompactProtocol{origTransport: trans, lastField: []int{}}
+	if et, ok := trans.(TRichTransport); ok {
+		p.trans = et
+	} else {
+		p.trans = NewTRichTransport(trans)
+	}
+
+	return p
+
+}
+
+//
+// Public Writing methods.
+//
+
+// Write a message header to the wire. Compact Protocol messages contain the
+// protocol version so we can migrate forwards in the future if need be.
+func (p *TCompactProtocol) WriteMessageBegin(name string, typeId TMessageType, seqid int32) error {
+	err := p.writeByteDirect(COMPACT_PROTOCOL_ID)
+	if err != nil {
+		return NewTProtocolException(err)
+	}
+	err = p.writeByteDirect((COMPACT_VERSION & COMPACT_VERSION_MASK) | ((byte(typeId) << COMPACT_TYPE_SHIFT_AMOUNT) & COMPACT_TYPE_MASK))
+	if err != nil {
+		return NewTProtocolException(err)
+	}
+	_, err = p.writeVarint32(seqid)
+	if err != nil {
+		return NewTProtocolException(err)
+	}
+	e := p.WriteString(name)
+	return e
+
+}
+
+func (p *TCompactProtocol) WriteMessageEnd() error { return nil }
+
+// Write a struct begin. This doesn't actually put anything on the wire. We
+// use it as an opportunity to put special placeholder markers on the field
+// stack so we can get the field id deltas correct.
+func (p *TCompactProtocol) WriteStructBegin(name string) error {
+	p.lastField = append(p.lastField, p.lastFieldId)
+	p.lastFieldId = 0
+	return nil
+}
+
+// Write a struct end. This doesn't actually put anything on the wire. We use
+// this as an opportunity to pop the last field from the current struct off
+// of the field stack.
+func (p *TCompactProtocol) WriteStructEnd() error {
+	p.lastFieldId = p.lastField[len(p.lastField)-1]
+	p.lastField = p.lastField[:len(p.lastField)-1]
+	return nil
+}
+
+func (p *TCompactProtocol) WriteFieldBegin(name string, typeId TType, id int16) error {
+	if typeId == BOOL {
+		// we want to possibly include the value, so we'll wait.
+		p.booleanFieldName, p.booleanFieldId, p.booleanFieldPending = name, id, true
+		return nil
+	}
+	_, err := p.writeFieldBeginInternal(name, typeId, id, 0xFF)
+	return NewTProtocolException(err)
+}
+
+// The workhorse of writeFieldBegin. It has the option of doing a
+// 'type override' of the type header. This is used specifically in the
+// boolean field case.
+func (p *TCompactProtocol) writeFieldBeginInternal(name string, typeId TType, id int16, typeOverride byte) (int, error) {
+	// short lastField = lastField_.pop();
+
+	// if there's a type override, use that.
+	var typeToWrite byte
+	if typeOverride == 0xFF {
+		typeToWrite = byte(p.getCompactType(typeId))
+	} else {
+		typeToWrite = typeOverride
+	}
+	// check if we can use delta encoding for the field id
+	fieldId := int(id)
+	written := 0
+	if fieldId > p.lastFieldId && fieldId-p.lastFieldId <= 15 {
+		// write them together
+		err := p.writeByteDirect(byte((fieldId-p.lastFieldId)<<4) | typeToWrite)
+		if err != nil {
+			return 0, err
+		}
+	} else {
+		// write them separate
+		err := p.writeByteDirect(typeToWrite)
+		if err != nil {
+			return 0, err
+		}
+		err = p.WriteI16(id)
+		written = 1 + 2
+		if err != nil {
+			return 0, err
+		}
+	}
+
+	p.lastFieldId = fieldId
+	// p.lastField.Push(field.id);
+	return written, nil
+}
+
+func (p *TCompactProtocol) WriteFieldEnd() error { return nil }
+
+func (p *TCompactProtocol) WriteFieldStop() error {
+	err := p.writeByteDirect(STOP)
+	return NewTProtocolException(err)
+}
+
+func (p *TCompactProtocol) WriteMapBegin(keyType TType, valueType TType, size int) error {
+	if size == 0 {
+		err := p.writeByteDirect(0)
+		return NewTProtocolException(err)
+	}
+	_, err := p.writeVarint32(int32(size))
+	if err != nil {
+		return NewTProtocolException(err)
+	}
+	err = p.writeByteDirect(byte(p.getCompactType(keyType))<<4 | byte(p.getCompactType(valueType)))
+	return NewTProtocolException(err)
+}
+
+func (p *TCompactProtocol) WriteMapEnd() error { return nil }
+
+// Write a list header.
+func (p *TCompactProtocol) WriteListBegin(elemType TType, size int) error {
+	_, err := p.writeCollectionBegin(elemType, size)
+	return NewTProtocolException(err)
+}
+
+func (p *TCompactProtocol) WriteListEnd() error { return nil }
+
+// Write a set header.
+func (p *TCompactProtocol) WriteSetBegin(elemType TType, size int) error {
+	_, err := p.writeCollectionBegin(elemType, size)
+	return NewTProtocolException(err)
+}
+
+func (p *TCompactProtocol) WriteSetEnd() error { return nil }
+
+func (p *TCompactProtocol) WriteBool(value bool) error {
+	v := byte(COMPACT_BOOLEAN_FALSE)
+	if value {
+		v = byte(COMPACT_BOOLEAN_TRUE)
+	}
+	if p.booleanFieldPending {
+		// we haven't written the field header yet
+		_, err := p.writeFieldBeginInternal(p.booleanFieldName, BOOL, p.booleanFieldId, v)
+		p.booleanFieldPending = false
+		return NewTProtocolException(err)
+	}
+	// we're not part of a field, so just write the value.
+	err := p.writeByteDirect(v)
+	return NewTProtocolException(err)
+}
+
+// Write a byte. Nothing to see here!
+func (p *TCompactProtocol) WriteByte(value int8) error {
+	err := p.writeByteDirect(byte(value))
+	return NewTProtocolException(err)
+}
+
+// Write an I16 as a zigzag varint.
+func (p *TCompactProtocol) WriteI16(value int16) error {
+	_, err := p.writeVarint32(p.int32ToZigzag(int32(value)))
+	return NewTProtocolException(err)
+}
+
+// Write an i32 as a zigzag varint.
+func (p *TCompactProtocol) WriteI32(value int32) error {
+	_, err := p.writeVarint32(p.int32ToZigzag(value))
+	return NewTProtocolException(err)
+}
+
+// Write an i64 as a zigzag varint.
+func (p *TCompactProtocol) WriteI64(value int64) error {
+	_, err := p.writeVarint64(p.int64ToZigzag(value))
+	return NewTProtocolException(err)
+}
+
+// Write a double to the wire as 8 bytes.
+func (p *TCompactProtocol) WriteDouble(value float64) error {
+	buf := p.buffer[0:8]
+	binary.LittleEndian.PutUint64(buf, math.Float64bits(value))
+	_, err := p.trans.Write(buf)
+	return NewTProtocolException(err)
+}
+
+// Write a string to the wire with a varint size preceding.
+func (p *TCompactProtocol) WriteString(value string) error {
+	_, e := p.writeVarint32(int32(len(value)))
+	if e != nil {
+		return NewTProtocolException(e)
+	}
+	if len(value) > 0 {
+	}
+	_, e = p.trans.WriteString(value)
+	return e
+}
+
+// Write a byte array, using a varint for the size.
+func (p *TCompactProtocol) WriteBinary(bin []byte) error {
+	_, e := p.writeVarint32(int32(len(bin)))
+	if e != nil {
+		return NewTProtocolException(e)
+	}
+	if len(bin) > 0 {
+		_, e = p.trans.Write(bin)
+		return NewTProtocolException(e)
+	}
+	return nil
+}
+
+//
+// Reading methods.
+//
+
+// Read a message header.
+func (p *TCompactProtocol) ReadMessageBegin() (name string, typeId TMessageType, seqId int32, err error) {
+
+	protocolId, err := p.readByteDirect()
+	if err != nil {
+		return
+	}
+
+	if protocolId != COMPACT_PROTOCOL_ID {
+		e := fmt.Errorf("Expected protocol id %02x but got %02x", COMPACT_PROTOCOL_ID, protocolId)
+		return "", typeId, seqId, NewTProtocolExceptionWithType(BAD_VERSION, e)
+	}
+
+	versionAndType, err := p.readByteDirect()
+	if err != nil {
+		return
+	}
+
+	version := versionAndType & COMPACT_VERSION_MASK
+	typeId = TMessageType((versionAndType >> COMPACT_TYPE_SHIFT_AMOUNT) & COMPACT_TYPE_BITS)
+	if version != COMPACT_VERSION {
+		e := fmt.Errorf("Expected version %02x but got %02x", COMPACT_VERSION, version)
+		err = NewTProtocolExceptionWithType(BAD_VERSION, e)
+		return
+	}
+	seqId, e := p.readVarint32()
+	if e != nil {
+		err = NewTProtocolException(e)
+		return
+	}
+	name, err = p.ReadString()
+	return
+}
+
+func (p *TCompactProtocol) ReadMessageEnd() error { return nil }
+
+// Read a struct begin. There's nothing on the wire for this, but it is our
+// opportunity to push a new struct begin marker onto the field stack.
+func (p *TCompactProtocol) ReadStructBegin() (name string, err error) {
+	p.lastField = append(p.lastField, p.lastFieldId)
+	p.lastFieldId = 0
+	return
+}
+
+// Doesn't actually consume any wire data, just removes the last field for
+// this struct from the field stack.
+func (p *TCompactProtocol) ReadStructEnd() error {
+	// consume the last field we read off the wire.
+	p.lastFieldId = p.lastField[len(p.lastField)-1]
+	p.lastField = p.lastField[:len(p.lastField)-1]
+	return nil
+}
+
+// Read a field header off the wire.
+func (p *TCompactProtocol) ReadFieldBegin() (name string, typeId TType, id int16, err error) {
+	t, err := p.readByteDirect()
+	if err != nil {
+		return
+	}
+
+	// if it's a stop, then we can return immediately, as the struct is over.
+	if (t & 0x0f) == STOP {
+		return "", STOP, 0, nil
+	}
+
+	// mask off the 4 MSB of the type header. it could contain a field id delta.
+	modifier := int16((t & 0xf0) >> 4)
+	if modifier == 0 {
+		// not a delta. look ahead for the zigzag varint field id.
+		id, err = p.ReadI16()
+		if err != nil {
+			return
+		}
+	} else {
+		// has a delta. add the delta to the last read field id.
+		id = int16(p.lastFieldId) + modifier
+	}
+	typeId, e := p.getTType(tCompactType(t & 0x0f))
+	if e != nil {
+		err = NewTProtocolException(e)
+		return
+	}
+
+	// if this happens to be a boolean field, the value is encoded in the type
+	if p.isBoolType(t) {
+		// save the boolean value in a special instance variable.
+		p.boolValue = (byte(t)&0x0f == COMPACT_BOOLEAN_TRUE)
+		p.boolValueIsNotNull = true
+	}
+
+	// push the new field onto the field stack so we can keep the deltas going.
+	p.lastFieldId = int(id)
+	return
+}
+
+func (p *TCompactProtocol) ReadFieldEnd() error { return nil }
+
+// Read a map header off the wire. If the size is zero, skip reading the key
+// and value type. This means that 0-length maps will yield TMaps without the
+// "correct" types.
+func (p *TCompactProtocol) ReadMapBegin() (keyType TType, valueType TType, size int, err error) {
+	size32, e := p.readVarint32()
+	if e != nil {
+		err = NewTProtocolException(e)
+		return
+	}
+	if size32 < 0 {
+		err = invalidDataLength
+		return
+	}
+	size = int(size32)
+
+	keyAndValueType := byte(STOP)
+	if size != 0 {
+		keyAndValueType, err = p.readByteDirect()
+		if err != nil {
+			return
+		}
+	}
+	keyType, _ = p.getTType(tCompactType(keyAndValueType >> 4))
+	valueType, _ = p.getTType(tCompactType(keyAndValueType & 0xf))
+	return
+}
+
+func (p *TCompactProtocol) ReadMapEnd() error { return nil }
+
+// Read a list header off the wire. If the list size is 0-14, the size will
+// be packed into the element type header. If it's a longer list, the 4 MSB
+// of the element type header will be 0xF, and a varint will follow with the
+// true size.
+func (p *TCompactProtocol) ReadListBegin() (elemType TType, size int, err error) {
+	size_and_type, err := p.readByteDirect()
+	if err != nil {
+		return
+	}
+	size = int((size_and_type >> 4) & 0x0f)
+	if size == 15 {
+		size2, e := p.readVarint32()
+		if e != nil {
+			err = NewTProtocolException(e)
+			return
+		}
+		if size2 < 0 {
+			err = invalidDataLength
+			return
+		}
+		size = int(size2)
+	}
+	elemType, e := p.getTType(tCompactType(size_and_type))
+	if e != nil {
+		err = NewTProtocolException(e)
+		return
+	}
+	return
+}
+
+func (p *TCompactProtocol) ReadListEnd() error { return nil }
+
+// Read a set header off the wire. If the set size is 0-14, the size will
+// be packed into the element type header. If it's a longer set, the 4 MSB
+// of the element type header will be 0xF, and a varint will follow with the
+// true size.
+func (p *TCompactProtocol) ReadSetBegin() (elemType TType, size int, err error) {
+	return p.ReadListBegin()
+}
+
+func (p *TCompactProtocol) ReadSetEnd() error { return nil }
+
+// Read a boolean off the wire. If this is a boolean field, the value should
+// already have been read during readFieldBegin, so we'll just consume the
+// pre-stored value. Otherwise, read a byte.
+func (p *TCompactProtocol) ReadBool() (value bool, err error) {
+	if p.boolValueIsNotNull {
+		p.boolValueIsNotNull = false
+		return p.boolValue, nil
+	}
+	v, err := p.readByteDirect()
+	return v == COMPACT_BOOLEAN_TRUE, err
+}
+
+// Read a single byte off the wire. Nothing interesting here.
+func (p *TCompactProtocol) ReadByte() (int8, error) {
+	v, err := p.readByteDirect()
+	if err != nil {
+		return 0, NewTProtocolException(err)
+	}
+	return int8(v), err
+}
+
+// Read an i16 from the wire as a zigzag varint.
+func (p *TCompactProtocol) ReadI16() (value int16, err error) {
+	v, err := p.ReadI32()
+	return int16(v), err
+}
+
+// Read an i32 from the wire as a zigzag varint.
+func (p *TCompactProtocol) ReadI32() (value int32, err error) {
+	v, e := p.readVarint32()
+	if e != nil {
+		return 0, NewTProtocolException(e)
+	}
+	value = p.zigzagToInt32(v)
+	return value, nil
+}
+
+// Read an i64 from the wire as a zigzag varint.
+func (p *TCompactProtocol) ReadI64() (value int64, err error) {
+	v, e := p.readVarint64()
+	if e != nil {
+		return 0, NewTProtocolException(e)
+	}
+	value = p.zigzagToInt64(v)
+	return value, nil
+}
+
+// No magic here - just read a double off the wire.
+func (p *TCompactProtocol) ReadDouble() (value float64, err error) {
+	longBits := p.buffer[0:8]
+	_, e := io.ReadFull(p.trans, longBits)
+	if e != nil {
+		return 0.0, NewTProtocolException(e)
+	}
+	return math.Float64frombits(p.bytesToUint64(longBits)), nil
+}
+
+// Reads a []byte (via readBinary), and then UTF-8 decodes it.
+func (p *TCompactProtocol) ReadString() (value string, err error) {
+	length, e := p.readVarint32()
+	if e != nil {
+		return "", NewTProtocolException(e)
+	}
+	if length < 0 {
+		return "", invalidDataLength
+	}
+	if uint64(length) > p.trans.RemainingBytes() {
+		return "", invalidDataLength
+	}
+
+	if length == 0 {
+		return "", nil
+	}
+	var buf []byte
+	if length <= int32(len(p.buffer)) {
+		buf = p.buffer[0:length]
+	} else {
+		buf = make([]byte, length)
+	}
+	_, e = io.ReadFull(p.trans, buf)
+	return string(buf), NewTProtocolException(e)
+}
+
+// Read a []byte from the wire.
+func (p *TCompactProtocol) ReadBinary() (value []byte, err error) {
+	length, e := p.readVarint32()
+	if e != nil {
+		return nil, NewTProtocolException(e)
+	}
+	if length == 0 {
+		return []byte{}, nil
+	}
+	if length < 0 {
+		return nil, invalidDataLength
+	}
+	if uint64(length) > p.trans.RemainingBytes() {
+		return nil, invalidDataLength
+	}
+
+	buf := make([]byte, length)
+	_, e = io.ReadFull(p.trans, buf)
+	return buf, NewTProtocolException(e)
+}
+
+func (p *TCompactProtocol) Flush() (err error) {
+	return NewTProtocolException(p.trans.Flush())
+}
+
+func (p *TCompactProtocol) Skip(fieldType TType) (err error) {
+	return SkipDefaultDepth(p, fieldType)
+}
+
+func (p *TCompactProtocol) Transport() TTransport {
+	return p.origTransport
+}
+
+//
+// Internal writing methods
+//
+
+// Abstract method for writing the start of lists and sets. List and sets on
+// the wire differ only by the type indicator.
+func (p *TCompactProtocol) writeCollectionBegin(elemType TType, size int) (int, error) {
+	if size <= 14 {
+		return 1, p.writeByteDirect(byte(int32(size<<4) | int32(p.getCompactType(elemType))))
+	}
+	err := p.writeByteDirect(0xf0 | byte(p.getCompactType(elemType)))
+	if err != nil {
+		return 0, err
+	}
+	m, err := p.writeVarint32(int32(size))
+	return 1 + m, err
+}
+
+// Write an i32 as a varint. Results in 1-5 bytes on the wire.
+// TODO(pomack): make a permanent buffer like writeVarint64?
+func (p *TCompactProtocol) writeVarint32(n int32) (int, error) {
+	i32buf := p.buffer[0:5]
+	idx := 0
+	for {
+		if (n & ^0x7F) == 0 {
+			i32buf[idx] = byte(n)
+			idx++
+			// p.writeByteDirect(byte(n));
+			break
+			// return;
+		} else {
+			i32buf[idx] = byte((n & 0x7F) | 0x80)
+			idx++
+			// p.writeByteDirect(byte(((n & 0x7F) | 0x80)));
+			u := uint32(n)
+			n = int32(u >> 7)
+		}
+	}
+	return p.trans.Write(i32buf[0:idx])
+}
+
+// Write an i64 as a varint. Results in 1-10 bytes on the wire.
+func (p *TCompactProtocol) writeVarint64(n int64) (int, error) {
+	varint64out := p.buffer[0:10]
+	idx := 0
+	for {
+		if (n & ^0x7F) == 0 {
+			varint64out[idx] = byte(n)
+			idx++
+			break
+		} else {
+			varint64out[idx] = byte((n & 0x7F) | 0x80)
+			idx++
+			u := uint64(n)
+			n = int64(u >> 7)
+		}
+	}
+	return p.trans.Write(varint64out[0:idx])
+}
+
+// Convert l into a zigzag long. This allows negative numbers to be
+// represented compactly as a varint.
+func (p *TCompactProtocol) int64ToZigzag(l int64) int64 {
+	return (l << 1) ^ (l >> 63)
+}
+
+// Convert l into a zigzag long. This allows negative numbers to be
+// represented compactly as a varint.
+func (p *TCompactProtocol) int32ToZigzag(n int32) int32 {
+	return (n << 1) ^ (n >> 31)
+}
+
+func (p *TCompactProtocol) fixedUint64ToBytes(n uint64, buf []byte) {
+	binary.LittleEndian.PutUint64(buf, n)
+}
+
+func (p *TCompactProtocol) fixedInt64ToBytes(n int64, buf []byte) {
+	binary.LittleEndian.PutUint64(buf, uint64(n))
+}
+
+// Writes a byte without any possibility of all that field header nonsense.
+// Used internally by other writing methods that know they need to write a byte.
+func (p *TCompactProtocol) writeByteDirect(b byte) error {
+	return p.trans.WriteByte(b)
+}
+
+// Writes a byte without any possibility of all that field header nonsense.
+func (p *TCompactProtocol) writeIntAsByteDirect(n int) (int, error) {
+	return 1, p.writeByteDirect(byte(n))
+}
+
+//
+// Internal reading methods
+//
+
+// Read an i32 from the wire as a varint. The MSB of each byte is set
+// if there is another byte to follow. This can read up to 5 bytes.
+func (p *TCompactProtocol) readVarint32() (int32, error) {
+	// if the wire contains the right stuff, this will just truncate the i64 we
+	// read and get us the right sign.
+	v, err := p.readVarint64()
+	return int32(v), err
+}
+
+// Read an i64 from the wire as a proper varint. The MSB of each byte is set
+// if there is another byte to follow. This can read up to 10 bytes.
+func (p *TCompactProtocol) readVarint64() (int64, error) {
+	shift := uint(0)
+	result := int64(0)
+	for {
+		b, err := p.readByteDirect()
+		if err != nil {
+			return 0, err
+		}
+		result |= int64(b&0x7f) << shift
+		if (b & 0x80) != 0x80 {
+			break
+		}
+		shift += 7
+	}
+	return result, nil
+}
+
+// Read a byte, unlike ReadByte that reads Thrift-byte that is i8.
+func (p *TCompactProtocol) readByteDirect() (byte, error) {
+	return p.trans.ReadByte()
+}
+
+//
+// encoding helpers
+//
+
+// Convert from zigzag int to int.
+func (p *TCompactProtocol) zigzagToInt32(n int32) int32 {
+	u := uint32(n)
+	return int32(u>>1) ^ -(n & 1)
+}
+
+// Convert from zigzag long to long.
+func (p *TCompactProtocol) zigzagToInt64(n int64) int64 {
+	u := uint64(n)
+	return int64(u>>1) ^ -(n & 1)
+}
+
+// Note that it's important that the mask bytes are long literals,
+// otherwise they'll default to ints, and when you shift an int left 56 bits,
+// you just get a messed up int.
+func (p *TCompactProtocol) bytesToInt64(b []byte) int64 {
+	return int64(binary.LittleEndian.Uint64(b))
+}
+
+// Note that it's important that the mask bytes are long literals,
+// otherwise they'll default to ints, and when you shift an int left 56 bits,
+// you just get a messed up int.
+func (p *TCompactProtocol) bytesToUint64(b []byte) uint64 {
+	return binary.LittleEndian.Uint64(b)
+}
+
+//
+// type testing and converting
+//
+
+func (p *TCompactProtocol) isBoolType(b byte) bool {
+	return (b&0x0f) == COMPACT_BOOLEAN_TRUE || (b&0x0f) == COMPACT_BOOLEAN_FALSE
+}
+
+// Given a tCompactType constant, convert it to its corresponding
+// TType value.
+func (p *TCompactProtocol) getTType(t tCompactType) (TType, error) {
+	switch byte(t) & 0x0f {
+	case STOP:
+		return STOP, nil
+	case COMPACT_BOOLEAN_FALSE, COMPACT_BOOLEAN_TRUE:
+		return BOOL, nil
+	case COMPACT_BYTE:
+		return BYTE, nil
+	case COMPACT_I16:
+		return I16, nil
+	case COMPACT_I32:
+		return I32, nil
+	case COMPACT_I64:
+		return I64, nil
+	case COMPACT_DOUBLE:
+		return DOUBLE, nil
+	case COMPACT_BINARY:
+		return STRING, nil
+	case COMPACT_LIST:
+		return LIST, nil
+	case COMPACT_SET:
+		return SET, nil
+	case COMPACT_MAP:
+		return MAP, nil
+	case COMPACT_STRUCT:
+		return STRUCT, nil
+	}
+	return STOP, TException(fmt.Errorf("don't know what type: %d", t&0x0f))
+}
+
+// Given a TType value, find the appropriate TCompactProtocol.Types constant.
+func (p *TCompactProtocol) getCompactType(t TType) tCompactType {
+	return ttypeToCompactType[t]
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/exception.go b/vendor/github.com/uber/jaeger-client-go/thrift/exception.go
new file mode 100644
index 000000000..ea8d6f661
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/exception.go
@@ -0,0 +1,44 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"errors"
+)
+
+// Generic Thrift exception
+type TException interface {
+	error
+}
+
+// Prepends additional information to an error without losing the Thrift exception interface
+func PrependError(prepend string, err error) error {
+	if t, ok := err.(TTransportException); ok {
+		return NewTTransportException(t.TypeId(), prepend+t.Error())
+	}
+	if t, ok := err.(TProtocolException); ok {
+		return NewTProtocolExceptionWithType(t.TypeId(), errors.New(prepend+err.Error()))
+	}
+	if t, ok := err.(TApplicationException); ok {
+		return NewTApplicationException(t.TypeId(), prepend+t.Error())
+	}
+
+	return errors.New(prepend + err.Error())
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/memory_buffer.go b/vendor/github.com/uber/jaeger-client-go/thrift/memory_buffer.go
new file mode 100644
index 000000000..b62fd56f0
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/memory_buffer.go
@@ -0,0 +1,79 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"bytes"
+)
+
+// Memory buffer-based implementation of the TTransport interface.
+type TMemoryBuffer struct {
+	*bytes.Buffer
+	size int
+}
+
+type TMemoryBufferTransportFactory struct {
+	size int
+}
+
+func (p *TMemoryBufferTransportFactory) GetTransport(trans TTransport) TTransport {
+	if trans != nil {
+		t, ok := trans.(*TMemoryBuffer)
+		if ok && t.size > 0 {
+			return NewTMemoryBufferLen(t.size)
+		}
+	}
+	return NewTMemoryBufferLen(p.size)
+}
+
+func NewTMemoryBufferTransportFactory(size int) *TMemoryBufferTransportFactory {
+	return &TMemoryBufferTransportFactory{size: size}
+}
+
+func NewTMemoryBuffer() *TMemoryBuffer {
+	return &TMemoryBuffer{Buffer: &bytes.Buffer{}, size: 0}
+}
+
+func NewTMemoryBufferLen(size int) *TMemoryBuffer {
+	buf := make([]byte, 0, size)
+	return &TMemoryBuffer{Buffer: bytes.NewBuffer(buf), size: size}
+}
+
+func (p *TMemoryBuffer) IsOpen() bool {
+	return true
+}
+
+func (p *TMemoryBuffer) Open() error {
+	return nil
+}
+
+func (p *TMemoryBuffer) Close() error {
+	p.Buffer.Reset()
+	return nil
+}
+
+// Flushing a memory buffer is a no-op
+func (p *TMemoryBuffer) Flush() error {
+	return nil
+}
+
+func (p *TMemoryBuffer) RemainingBytes() (num_bytes uint64) {
+	return uint64(p.Buffer.Len())
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/messagetype.go b/vendor/github.com/uber/jaeger-client-go/thrift/messagetype.go
new file mode 100644
index 000000000..25ab2e98a
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/messagetype.go
@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+// Message type constants in the Thrift protocol.
+type TMessageType int32
+
+const (
+	INVALID_TMESSAGE_TYPE TMessageType = 0
+	CALL                  TMessageType = 1
+	REPLY                 TMessageType = 2
+	EXCEPTION             TMessageType = 3
+	ONEWAY                TMessageType = 4
+)
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/numeric.go b/vendor/github.com/uber/jaeger-client-go/thrift/numeric.go
new file mode 100644
index 000000000..aa8daa9b5
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/numeric.go
@@ -0,0 +1,164 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"math"
+	"strconv"
+)
+
+type Numeric interface {
+	Int64() int64
+	Int32() int32
+	Int16() int16
+	Byte() byte
+	Int() int
+	Float64() float64
+	Float32() float32
+	String() string
+	isNull() bool
+}
+
+type numeric struct {
+	iValue int64
+	dValue float64
+	sValue string
+	isNil  bool
+}
+
+var (
+	INFINITY          Numeric
+	NEGATIVE_INFINITY Numeric
+	NAN               Numeric
+	ZERO              Numeric
+	NUMERIC_NULL      Numeric
+)
+
+func NewNumericFromDouble(dValue float64) Numeric {
+	if math.IsInf(dValue, 1) {
+		return INFINITY
+	}
+	if math.IsInf(dValue, -1) {
+		return NEGATIVE_INFINITY
+	}
+	if math.IsNaN(dValue) {
+		return NAN
+	}
+	iValue := int64(dValue)
+	sValue := strconv.FormatFloat(dValue, 'g', 10, 64)
+	isNil := false
+	return &numeric{iValue: iValue, dValue: dValue, sValue: sValue, isNil: isNil}
+}
+
+func NewNumericFromI64(iValue int64) Numeric {
+	dValue := float64(iValue)
+	sValue := string(iValue)
+	isNil := false
+	return &numeric{iValue: iValue, dValue: dValue, sValue: sValue, isNil: isNil}
+}
+
+func NewNumericFromI32(iValue int32) Numeric {
+	dValue := float64(iValue)
+	sValue := string(iValue)
+	isNil := false
+	return &numeric{iValue: int64(iValue), dValue: dValue, sValue: sValue, isNil: isNil}
+}
+
+func NewNumericFromString(sValue string) Numeric {
+	if sValue == INFINITY.String() {
+		return INFINITY
+	}
+	if sValue == NEGATIVE_INFINITY.String() {
+		return NEGATIVE_INFINITY
+	}
+	if sValue == NAN.String() {
+		return NAN
+	}
+	iValue, _ := strconv.ParseInt(sValue, 10, 64)
+	dValue, _ := strconv.ParseFloat(sValue, 64)
+	isNil := len(sValue) == 0
+	return &numeric{iValue: iValue, dValue: dValue, sValue: sValue, isNil: isNil}
+}
+
+func NewNumericFromJSONString(sValue string, isNull bool) Numeric {
+	if isNull {
+		return NewNullNumeric()
+	}
+	if sValue == JSON_INFINITY {
+		return INFINITY
+	}
+	if sValue == JSON_NEGATIVE_INFINITY {
+		return NEGATIVE_INFINITY
+	}
+	if sValue == JSON_NAN {
+		return NAN
+	}
+	iValue, _ := strconv.ParseInt(sValue, 10, 64)
+	dValue, _ := strconv.ParseFloat(sValue, 64)
+	return &numeric{iValue: iValue, dValue: dValue, sValue: sValue, isNil: isNull}
+}
+
+func NewNullNumeric() Numeric {
+	return &numeric{iValue: 0, dValue: 0.0, sValue: "", isNil: true}
+}
+
+func (p *numeric) Int64() int64 {
+	return p.iValue
+}
+
+func (p *numeric) Int32() int32 {
+	return int32(p.iValue)
+}
+
+func (p *numeric) Int16() int16 {
+	return int16(p.iValue)
+}
+
+func (p *numeric) Byte() byte {
+	return byte(p.iValue)
+}
+
+func (p *numeric) Int() int {
+	return int(p.iValue)
+}
+
+func (p *numeric) Float64() float64 {
+	return p.dValue
+}
+
+func (p *numeric) Float32() float32 {
+	return float32(p.dValue)
+}
+
+func (p *numeric) String() string {
+	return p.sValue
+}
+
+func (p *numeric) isNull() bool {
+	return p.isNil
+}
+
+func init() {
+	INFINITY = &numeric{iValue: 0, dValue: math.Inf(1), sValue: "Infinity", isNil: false}
+	NEGATIVE_INFINITY = &numeric{iValue: 0, dValue: math.Inf(-1), sValue: "-Infinity", isNil: false}
+	NAN = &numeric{iValue: 0, dValue: math.NaN(), sValue: "NaN", isNil: false}
+	ZERO = &numeric{iValue: 0, dValue: 0, sValue: "0", isNil: false}
+	NUMERIC_NULL = &numeric{iValue: 0, dValue: 0, sValue: "0", isNil: true}
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/processor.go b/vendor/github.com/uber/jaeger-client-go/thrift/processor.go
new file mode 100644
index 000000000..ca0d3faf2
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/processor.go
@@ -0,0 +1,30 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+// A processor is a generic object which operates upon an input stream and
+// writes to some output stream.
+type TProcessor interface {
+	Process(in, out TProtocol) (bool, TException)
+}
+
+type TProcessorFunction interface {
+	Process(seqId int32, in, out TProtocol) (bool, TException)
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/protocol.go b/vendor/github.com/uber/jaeger-client-go/thrift/protocol.go
new file mode 100644
index 000000000..45fa202e7
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/protocol.go
@@ -0,0 +1,175 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"errors"
+)
+
+const (
+	VERSION_MASK = 0xffff0000
+	VERSION_1    = 0x80010000
+)
+
+type TProtocol interface {
+	WriteMessageBegin(name string, typeId TMessageType, seqid int32) error
+	WriteMessageEnd() error
+	WriteStructBegin(name string) error
+	WriteStructEnd() error
+	WriteFieldBegin(name string, typeId TType, id int16) error
+	WriteFieldEnd() error
+	WriteFieldStop() error
+	WriteMapBegin(keyType TType, valueType TType, size int) error
+	WriteMapEnd() error
+	WriteListBegin(elemType TType, size int) error
+	WriteListEnd() error
+	WriteSetBegin(elemType TType, size int) error
+	WriteSetEnd() error
+	WriteBool(value bool) error
+	WriteByte(value int8) error
+	WriteI16(value int16) error
+	WriteI32(value int32) error
+	WriteI64(value int64) error
+	WriteDouble(value float64) error
+	WriteString(value string) error
+	WriteBinary(value []byte) error
+
+	ReadMessageBegin() (name string, typeId TMessageType, seqid int32, err error)
+	ReadMessageEnd() error
+	ReadStructBegin() (name string, err error)
+	ReadStructEnd() error
+	ReadFieldBegin() (name string, typeId TType, id int16, err error)
+	ReadFieldEnd() error
+	ReadMapBegin() (keyType TType, valueType TType, size int, err error)
+	ReadMapEnd() error
+	ReadListBegin() (elemType TType, size int, err error)
+	ReadListEnd() error
+	ReadSetBegin() (elemType TType, size int, err error)
+	ReadSetEnd() error
+	ReadBool() (value bool, err error)
+	ReadByte() (value int8, err error)
+	ReadI16() (value int16, err error)
+	ReadI32() (value int32, err error)
+	ReadI64() (value int64, err error)
+	ReadDouble() (value float64, err error)
+	ReadString() (value string, err error)
+	ReadBinary() (value []byte, err error)
+
+	Skip(fieldType TType) (err error)
+	Flush() (err error)
+
+	Transport() TTransport
+}
+
+// The maximum recursive depth the skip() function will traverse
+const DEFAULT_RECURSION_DEPTH = 64
+
+// Skips over the next data element from the provided input TProtocol object.
+func SkipDefaultDepth(prot TProtocol, typeId TType) (err error) {
+	return Skip(prot, typeId, DEFAULT_RECURSION_DEPTH)
+}
+
+// Skips over the next data element from the provided input TProtocol object.
+func Skip(self TProtocol, fieldType TType, maxDepth int) (err error) {
+	
+    if maxDepth <= 0 {
+		return NewTProtocolExceptionWithType( DEPTH_LIMIT, errors.New("Depth limit exceeded"))
+	}
+
+	switch fieldType {
+	case STOP:
+		return
+	case BOOL:
+		_, err = self.ReadBool()
+		return
+	case BYTE:
+		_, err = self.ReadByte()
+		return
+	case I16:
+		_, err = self.ReadI16()
+		return
+	case I32:
+		_, err = self.ReadI32()
+		return
+	case I64:
+		_, err = self.ReadI64()
+		return
+	case DOUBLE:
+		_, err = self.ReadDouble()
+		return
+	case STRING:
+		_, err = self.ReadString()
+		return
+	case STRUCT:
+		if _, err = self.ReadStructBegin(); err != nil {
+			return err
+		}
+		for {
+			_, typeId, _, _ := self.ReadFieldBegin()
+			if typeId == STOP {
+				break
+			}
+			err := Skip(self, typeId, maxDepth-1)
+			if err != nil {
+				return err
+			}
+			self.ReadFieldEnd()
+		}
+		return self.ReadStructEnd()
+	case MAP:
+		keyType, valueType, size, err := self.ReadMapBegin()
+		if err != nil {
+			return err
+		}
+		for i := 0; i < size; i++ {
+			err := Skip(self, keyType, maxDepth-1)
+			if err != nil {
+				return err
+			}
+			self.Skip(valueType)
+		}
+		return self.ReadMapEnd()
+	case SET:
+		elemType, size, err := self.ReadSetBegin()
+		if err != nil {
+			return err
+		}
+		for i := 0; i < size; i++ {
+			err := Skip(self, elemType, maxDepth-1)
+			if err != nil {
+				return err
+			}
+		}
+		return self.ReadSetEnd()
+	case LIST:
+		elemType, size, err := self.ReadListBegin()
+		if err != nil {
+			return err
+		}
+		for i := 0; i < size; i++ {
+			err := Skip(self, elemType, maxDepth-1)
+			if err != nil {
+				return err
+			}
+		}
+		return self.ReadListEnd()
+	}
+	return nil
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/protocol_exception.go b/vendor/github.com/uber/jaeger-client-go/thrift/protocol_exception.go
new file mode 100644
index 000000000..6e357ee89
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/protocol_exception.go
@@ -0,0 +1,78 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"encoding/base64"
+)
+
+// Thrift Protocol exception
+type TProtocolException interface {
+	TException
+	TypeId() int
+}
+
+const (
+	UNKNOWN_PROTOCOL_EXCEPTION = 0
+	INVALID_DATA               = 1
+	NEGATIVE_SIZE              = 2
+	SIZE_LIMIT                 = 3
+	BAD_VERSION                = 4
+	NOT_IMPLEMENTED            = 5
+	DEPTH_LIMIT                = 6
+)
+
+type tProtocolException struct {
+	typeId  int
+	message string
+}
+
+func (p *tProtocolException) TypeId() int {
+	return p.typeId
+}
+
+func (p *tProtocolException) String() string {
+	return p.message
+}
+
+func (p *tProtocolException) Error() string {
+	return p.message
+}
+
+func NewTProtocolException(err error) TProtocolException {
+	if err == nil {
+		return nil
+	}
+	if e,ok := err.(TProtocolException); ok {
+		return e
+	}
+	if _, ok := err.(base64.CorruptInputError); ok {
+		return &tProtocolException{INVALID_DATA, err.Error()}
+	}
+	return &tProtocolException{UNKNOWN_PROTOCOL_EXCEPTION, err.Error()}
+}
+
+func NewTProtocolExceptionWithType(errType int, err error) TProtocolException {
+	if err == nil {
+		return nil
+	}
+	return &tProtocolException{errType, err.Error()}
+}
+
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/protocol_factory.go b/vendor/github.com/uber/jaeger-client-go/thrift/protocol_factory.go
new file mode 100644
index 000000000..c40f796d8
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/protocol_factory.go
@@ -0,0 +1,25 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+// Factory interface for constructing protocol instances.
+type TProtocolFactory interface {
+	GetProtocol(trans TTransport) TProtocol
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/rich_transport.go b/vendor/github.com/uber/jaeger-client-go/thrift/rich_transport.go
new file mode 100644
index 000000000..8e296a99b
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/rich_transport.go
@@ -0,0 +1,69 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import "io"
+
+type RichTransport struct {
+	TTransport
+}
+
+// Wraps Transport to provide TRichTransport interface
+func NewTRichTransport(trans TTransport) *RichTransport {
+	return &RichTransport{trans}
+}
+
+func (r *RichTransport) ReadByte() (c byte, err error) {
+	return readByte(r.TTransport)
+}
+
+func (r *RichTransport) WriteByte(c byte) error {
+	return writeByte(r.TTransport, c)
+}
+
+func (r *RichTransport) WriteString(s string) (n int, err error) {
+	return r.Write([]byte(s))
+}
+
+func (r *RichTransport) RemainingBytes() (num_bytes uint64) {
+	return r.TTransport.RemainingBytes()
+}
+
+func readByte(r io.Reader) (c byte, err error) {
+	v := [1]byte{0}
+	n, err := r.Read(v[0:1])
+	if n > 0 && (err == nil || err == io.EOF) {
+		return v[0], nil
+	}
+	if n > 0 && err != nil {
+		return v[0], err
+	}
+	if err != nil {
+		return 0, err
+	}
+	return v[0], nil
+}
+
+func writeByte(w io.Writer, c byte) error {
+	v := [1]byte{c}
+	_, err := w.Write(v[0:1])
+	return err
+}
+
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/serializer.go b/vendor/github.com/uber/jaeger-client-go/thrift/serializer.go
new file mode 100644
index 000000000..771222999
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/serializer.go
@@ -0,0 +1,75 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+type TSerializer struct {
+	Transport *TMemoryBuffer
+	Protocol  TProtocol
+}
+
+type TStruct interface {
+	Write(p TProtocol) error
+	Read(p TProtocol) error
+}
+
+func NewTSerializer() *TSerializer {
+	transport := NewTMemoryBufferLen(1024)
+	protocol := NewTBinaryProtocolFactoryDefault().GetProtocol(transport)
+
+	return &TSerializer{
+		transport,
+		protocol}
+}
+
+func (t *TSerializer) WriteString(msg TStruct) (s string, err error) {
+	t.Transport.Reset()
+
+	if err = msg.Write(t.Protocol); err != nil {
+		return
+	}
+
+	if err = t.Protocol.Flush(); err != nil {
+		return
+	}
+	if err = t.Transport.Flush(); err != nil {
+		return
+	}
+
+	return t.Transport.String(), nil
+}
+
+func (t *TSerializer) Write(msg TStruct) (b []byte, err error) {
+	t.Transport.Reset()
+
+	if err = msg.Write(t.Protocol); err != nil {
+		return
+	}
+
+	if err = t.Protocol.Flush(); err != nil {
+		return
+	}
+
+	if err = t.Transport.Flush(); err != nil {
+		return
+	}
+
+	b = append(b, t.Transport.Bytes()...)
+	return
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/simple_json_protocol.go b/vendor/github.com/uber/jaeger-client-go/thrift/simple_json_protocol.go
new file mode 100644
index 000000000..412a482d0
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/simple_json_protocol.go
@@ -0,0 +1,1337 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"bufio"
+	"bytes"
+	"encoding/base64"
+	"encoding/json"
+	"fmt"
+	"io"
+	"math"
+	"strconv"
+)
+
+type _ParseContext int
+
+const (
+	_CONTEXT_IN_TOPLEVEL          _ParseContext = 1
+	_CONTEXT_IN_LIST_FIRST        _ParseContext = 2
+	_CONTEXT_IN_LIST              _ParseContext = 3
+	_CONTEXT_IN_OBJECT_FIRST      _ParseContext = 4
+	_CONTEXT_IN_OBJECT_NEXT_KEY   _ParseContext = 5
+	_CONTEXT_IN_OBJECT_NEXT_VALUE _ParseContext = 6
+)
+
+func (p _ParseContext) String() string {
+	switch p {
+	case _CONTEXT_IN_TOPLEVEL:
+		return "TOPLEVEL"
+	case _CONTEXT_IN_LIST_FIRST:
+		return "LIST-FIRST"
+	case _CONTEXT_IN_LIST:
+		return "LIST"
+	case _CONTEXT_IN_OBJECT_FIRST:
+		return "OBJECT-FIRST"
+	case _CONTEXT_IN_OBJECT_NEXT_KEY:
+		return "OBJECT-NEXT-KEY"
+	case _CONTEXT_IN_OBJECT_NEXT_VALUE:
+		return "OBJECT-NEXT-VALUE"
+	}
+	return "UNKNOWN-PARSE-CONTEXT"
+}
+
+// JSON protocol implementation for thrift.
+//
+// This protocol produces/consumes a simple output format
+// suitable for parsing by scripting languages.  It should not be
+// confused with the full-featured TJSONProtocol.
+//
+type TSimpleJSONProtocol struct {
+	trans TTransport
+
+	parseContextStack []int
+	dumpContext       []int
+
+	writer *bufio.Writer
+	reader *bufio.Reader
+}
+
+// Constructor
+func NewTSimpleJSONProtocol(t TTransport) *TSimpleJSONProtocol {
+	v := &TSimpleJSONProtocol{trans: t,
+		writer: bufio.NewWriter(t),
+		reader: bufio.NewReader(t),
+	}
+	v.parseContextStack = append(v.parseContextStack, int(_CONTEXT_IN_TOPLEVEL))
+	v.dumpContext = append(v.dumpContext, int(_CONTEXT_IN_TOPLEVEL))
+	return v
+}
+
+// Factory
+type TSimpleJSONProtocolFactory struct{}
+
+func (p *TSimpleJSONProtocolFactory) GetProtocol(trans TTransport) TProtocol {
+	return NewTSimpleJSONProtocol(trans)
+}
+
+func NewTSimpleJSONProtocolFactory() *TSimpleJSONProtocolFactory {
+	return &TSimpleJSONProtocolFactory{}
+}
+
+var (
+	JSON_COMMA                   []byte
+	JSON_COLON                   []byte
+	JSON_LBRACE                  []byte
+	JSON_RBRACE                  []byte
+	JSON_LBRACKET                []byte
+	JSON_RBRACKET                []byte
+	JSON_QUOTE                   byte
+	JSON_QUOTE_BYTES             []byte
+	JSON_NULL                    []byte
+	JSON_TRUE                    []byte
+	JSON_FALSE                   []byte
+	JSON_INFINITY                string
+	JSON_NEGATIVE_INFINITY       string
+	JSON_NAN                     string
+	JSON_INFINITY_BYTES          []byte
+	JSON_NEGATIVE_INFINITY_BYTES []byte
+	JSON_NAN_BYTES               []byte
+	json_nonbase_map_elem_bytes  []byte
+)
+
+func init() {
+	JSON_COMMA = []byte{','}
+	JSON_COLON = []byte{':'}
+	JSON_LBRACE = []byte{'{'}
+	JSON_RBRACE = []byte{'}'}
+	JSON_LBRACKET = []byte{'['}
+	JSON_RBRACKET = []byte{']'}
+	JSON_QUOTE = '"'
+	JSON_QUOTE_BYTES = []byte{'"'}
+	JSON_NULL = []byte{'n', 'u', 'l', 'l'}
+	JSON_TRUE = []byte{'t', 'r', 'u', 'e'}
+	JSON_FALSE = []byte{'f', 'a', 'l', 's', 'e'}
+	JSON_INFINITY = "Infinity"
+	JSON_NEGATIVE_INFINITY = "-Infinity"
+	JSON_NAN = "NaN"
+	JSON_INFINITY_BYTES = []byte{'I', 'n', 'f', 'i', 'n', 'i', 't', 'y'}
+	JSON_NEGATIVE_INFINITY_BYTES = []byte{'-', 'I', 'n', 'f', 'i', 'n', 'i', 't', 'y'}
+	JSON_NAN_BYTES = []byte{'N', 'a', 'N'}
+	json_nonbase_map_elem_bytes = []byte{']', ',', '['}
+}
+
+func jsonQuote(s string) string {
+	b, _ := json.Marshal(s)
+	s1 := string(b)
+	return s1
+}
+
+func jsonUnquote(s string) (string, bool) {
+	s1 := new(string)
+	err := json.Unmarshal([]byte(s), s1)
+	return *s1, err == nil
+}
+
+func mismatch(expected, actual string) error {
+	return fmt.Errorf("Expected '%s' but found '%s' while parsing JSON.", expected, actual)
+}
+
+func (p *TSimpleJSONProtocol) WriteMessageBegin(name string, typeId TMessageType, seqId int32) error {
+	p.resetContextStack() // THRIFT-3735
+	if e := p.OutputListBegin(); e != nil {
+		return e
+	}
+	if e := p.WriteString(name); e != nil {
+		return e
+	}
+	if e := p.WriteByte(int8(typeId)); e != nil {
+		return e
+	}
+	if e := p.WriteI32(seqId); e != nil {
+		return e
+	}
+	return nil
+}
+
+func (p *TSimpleJSONProtocol) WriteMessageEnd() error {
+	return p.OutputListEnd()
+}
+
+func (p *TSimpleJSONProtocol) WriteStructBegin(name string) error {
+	if e := p.OutputObjectBegin(); e != nil {
+		return e
+	}
+	return nil
+}
+
+func (p *TSimpleJSONProtocol) WriteStructEnd() error {
+	return p.OutputObjectEnd()
+}
+
+func (p *TSimpleJSONProtocol) WriteFieldBegin(name string, typeId TType, id int16) error {
+	if e := p.WriteString(name); e != nil {
+		return e
+	}
+	return nil
+}
+
+func (p *TSimpleJSONProtocol) WriteFieldEnd() error {
+	//return p.OutputListEnd()
+	return nil
+}
+
+func (p *TSimpleJSONProtocol) WriteFieldStop() error { return nil }
+
+func (p *TSimpleJSONProtocol) WriteMapBegin(keyType TType, valueType TType, size int) error {
+	if e := p.OutputListBegin(); e != nil {
+		return e
+	}
+	if e := p.WriteByte(int8(keyType)); e != nil {
+		return e
+	}
+	if e := p.WriteByte(int8(valueType)); e != nil {
+		return e
+	}
+	return p.WriteI32(int32(size))
+}
+
+func (p *TSimpleJSONProtocol) WriteMapEnd() error {
+	return p.OutputListEnd()
+}
+
+func (p *TSimpleJSONProtocol) WriteListBegin(elemType TType, size int) error {
+	return p.OutputElemListBegin(elemType, size)
+}
+
+func (p *TSimpleJSONProtocol) WriteListEnd() error {
+	return p.OutputListEnd()
+}
+
+func (p *TSimpleJSONProtocol) WriteSetBegin(elemType TType, size int) error {
+	return p.OutputElemListBegin(elemType, size)
+}
+
+func (p *TSimpleJSONProtocol) WriteSetEnd() error {
+	return p.OutputListEnd()
+}
+
+func (p *TSimpleJSONProtocol) WriteBool(b bool) error {
+	return p.OutputBool(b)
+}
+
+func (p *TSimpleJSONProtocol) WriteByte(b int8) error {
+	return p.WriteI32(int32(b))
+}
+
+func (p *TSimpleJSONProtocol) WriteI16(v int16) error {
+	return p.WriteI32(int32(v))
+}
+
+func (p *TSimpleJSONProtocol) WriteI32(v int32) error {
+	return p.OutputI64(int64(v))
+}
+
+func (p *TSimpleJSONProtocol) WriteI64(v int64) error {
+	return p.OutputI64(int64(v))
+}
+
+func (p *TSimpleJSONProtocol) WriteDouble(v float64) error {
+	return p.OutputF64(v)
+}
+
+func (p *TSimpleJSONProtocol) WriteString(v string) error {
+	return p.OutputString(v)
+}
+
+func (p *TSimpleJSONProtocol) WriteBinary(v []byte) error {
+	// JSON library only takes in a string,
+	// not an arbitrary byte array, to ensure bytes are transmitted
+	// efficiently we must convert this into a valid JSON string
+	// therefore we use base64 encoding to avoid excessive escaping/quoting
+	if e := p.OutputPreValue(); e != nil {
+		return e
+	}
+	if _, e := p.write(JSON_QUOTE_BYTES); e != nil {
+		return NewTProtocolException(e)
+	}
+	writer := base64.NewEncoder(base64.StdEncoding, p.writer)
+	if _, e := writer.Write(v); e != nil {
+		p.writer.Reset(p.trans) // THRIFT-3735
+		return NewTProtocolException(e)
+	}
+	if e := writer.Close(); e != nil {
+		return NewTProtocolException(e)
+	}
+	if _, e := p.write(JSON_QUOTE_BYTES); e != nil {
+		return NewTProtocolException(e)
+	}
+	return p.OutputPostValue()
+}
+
+// Reading methods.
+func (p *TSimpleJSONProtocol) ReadMessageBegin() (name string, typeId TMessageType, seqId int32, err error) {
+	p.resetContextStack() // THRIFT-3735
+	if isNull, err := p.ParseListBegin(); isNull || err != nil {
+		return name, typeId, seqId, err
+	}
+	if name, err = p.ReadString(); err != nil {
+		return name, typeId, seqId, err
+	}
+	bTypeId, err := p.ReadByte()
+	typeId = TMessageType(bTypeId)
+	if err != nil {
+		return name, typeId, seqId, err
+	}
+	if seqId, err = p.ReadI32(); err != nil {
+		return name, typeId, seqId, err
+	}
+	return name, typeId, seqId, nil
+}
+
+func (p *TSimpleJSONProtocol) ReadMessageEnd() error {
+	return p.ParseListEnd()
+}
+
+func (p *TSimpleJSONProtocol) ReadStructBegin() (name string, err error) {
+	_, err = p.ParseObjectStart()
+	return "", err
+}
+
+func (p *TSimpleJSONProtocol) ReadStructEnd() error {
+	return p.ParseObjectEnd()
+}
+
+func (p *TSimpleJSONProtocol) ReadFieldBegin() (string, TType, int16, error) {
+	if err := p.ParsePreValue(); err != nil {
+		return "", STOP, 0, err
+	}
+	b, _ := p.reader.Peek(1)
+	if len(b) > 0 {
+		switch b[0] {
+		case JSON_RBRACE[0]:
+			return "", STOP, 0, nil
+		case JSON_QUOTE:
+			p.reader.ReadByte()
+			name, err := p.ParseStringBody()
+			// simplejson is not meant to be read back into thrift
+			// - see http://wiki.apache.org/thrift/ThriftUsageJava
+			// - use JSON instead
+			if err != nil {
+				return name, STOP, 0, err
+			}
+			return name, STOP, -1, p.ParsePostValue()
+			/*
+			   if err = p.ParsePostValue(); err != nil {
+			     return name, STOP, 0, err
+			   }
+			   if isNull, err := p.ParseListBegin(); isNull || err != nil {
+			     return name, STOP, 0, err
+			   }
+			   bType, err := p.ReadByte()
+			   thetype := TType(bType)
+			   if err != nil {
+			     return name, thetype, 0, err
+			   }
+			   id, err := p.ReadI16()
+			   return name, thetype, id, err
+			*/
+		}
+		e := fmt.Errorf("Expected \"}\" or '\"', but found: '%s'", string(b))
+		return "", STOP, 0, NewTProtocolExceptionWithType(INVALID_DATA, e)
+	}
+	return "", STOP, 0, NewTProtocolException(io.EOF)
+}
+
+func (p *TSimpleJSONProtocol) ReadFieldEnd() error {
+	return nil
+	//return p.ParseListEnd()
+}
+
+func (p *TSimpleJSONProtocol) ReadMapBegin() (keyType TType, valueType TType, size int, e error) {
+	if isNull, e := p.ParseListBegin(); isNull || e != nil {
+		return VOID, VOID, 0, e
+	}
+
+	// read keyType
+	bKeyType, e := p.ReadByte()
+	keyType = TType(bKeyType)
+	if e != nil {
+		return keyType, valueType, size, e
+	}
+
+	// read valueType
+	bValueType, e := p.ReadByte()
+	valueType = TType(bValueType)
+	if e != nil {
+		return keyType, valueType, size, e
+	}
+
+	// read size
+	iSize, err := p.ReadI64()
+	size = int(iSize)
+	return keyType, valueType, size, err
+}
+
+func (p *TSimpleJSONProtocol) ReadMapEnd() error {
+	return p.ParseListEnd()
+}
+
+func (p *TSimpleJSONProtocol) ReadListBegin() (elemType TType, size int, e error) {
+	return p.ParseElemListBegin()
+}
+
+func (p *TSimpleJSONProtocol) ReadListEnd() error {
+	return p.ParseListEnd()
+}
+
+func (p *TSimpleJSONProtocol) ReadSetBegin() (elemType TType, size int, e error) {
+	return p.ParseElemListBegin()
+}
+
+func (p *TSimpleJSONProtocol) ReadSetEnd() error {
+	return p.ParseListEnd()
+}
+
+func (p *TSimpleJSONProtocol) ReadBool() (bool, error) {
+	var value bool
+
+	if err := p.ParsePreValue(); err != nil {
+		return value, err
+	}
+	f, _ := p.reader.Peek(1)
+	if len(f) > 0 {
+		switch f[0] {
+		case JSON_TRUE[0]:
+			b := make([]byte, len(JSON_TRUE))
+			_, err := p.reader.Read(b)
+			if err != nil {
+				return false, NewTProtocolException(err)
+			}
+			if string(b) == string(JSON_TRUE) {
+				value = true
+			} else {
+				e := fmt.Errorf("Expected \"true\" but found: %s", string(b))
+				return value, NewTProtocolExceptionWithType(INVALID_DATA, e)
+			}
+			break
+		case JSON_FALSE[0]:
+			b := make([]byte, len(JSON_FALSE))
+			_, err := p.reader.Read(b)
+			if err != nil {
+				return false, NewTProtocolException(err)
+			}
+			if string(b) == string(JSON_FALSE) {
+				value = false
+			} else {
+				e := fmt.Errorf("Expected \"false\" but found: %s", string(b))
+				return value, NewTProtocolExceptionWithType(INVALID_DATA, e)
+			}
+			break
+		case JSON_NULL[0]:
+			b := make([]byte, len(JSON_NULL))
+			_, err := p.reader.Read(b)
+			if err != nil {
+				return false, NewTProtocolException(err)
+			}
+			if string(b) == string(JSON_NULL) {
+				value = false
+			} else {
+				e := fmt.Errorf("Expected \"null\" but found: %s", string(b))
+				return value, NewTProtocolExceptionWithType(INVALID_DATA, e)
+			}
+		default:
+			e := fmt.Errorf("Expected \"true\", \"false\", or \"null\" but found: %s", string(f))
+			return value, NewTProtocolExceptionWithType(INVALID_DATA, e)
+		}
+	}
+	return value, p.ParsePostValue()
+}
+
+func (p *TSimpleJSONProtocol) ReadByte() (int8, error) {
+	v, err := p.ReadI64()
+	return int8(v), err
+}
+
+func (p *TSimpleJSONProtocol) ReadI16() (int16, error) {
+	v, err := p.ReadI64()
+	return int16(v), err
+}
+
+func (p *TSimpleJSONProtocol) ReadI32() (int32, error) {
+	v, err := p.ReadI64()
+	return int32(v), err
+}
+
+func (p *TSimpleJSONProtocol) ReadI64() (int64, error) {
+	v, _, err := p.ParseI64()
+	return v, err
+}
+
+func (p *TSimpleJSONProtocol) ReadDouble() (float64, error) {
+	v, _, err := p.ParseF64()
+	return v, err
+}
+
+func (p *TSimpleJSONProtocol) ReadString() (string, error) {
+	var v string
+	if err := p.ParsePreValue(); err != nil {
+		return v, err
+	}
+	f, _ := p.reader.Peek(1)
+	if len(f) > 0 && f[0] == JSON_QUOTE {
+		p.reader.ReadByte()
+		value, err := p.ParseStringBody()
+		v = value
+		if err != nil {
+			return v, err
+		}
+	} else if len(f) > 0 && f[0] == JSON_NULL[0] {
+		b := make([]byte, len(JSON_NULL))
+		_, err := p.reader.Read(b)
+		if err != nil {
+			return v, NewTProtocolException(err)
+		}
+		if string(b) != string(JSON_NULL) {
+			e := fmt.Errorf("Expected a JSON string, found unquoted data started with %s", string(b))
+			return v, NewTProtocolExceptionWithType(INVALID_DATA, e)
+		}
+	} else {
+		e := fmt.Errorf("Expected a JSON string, found unquoted data started with %s", string(f))
+		return v, NewTProtocolExceptionWithType(INVALID_DATA, e)
+	}
+	return v, p.ParsePostValue()
+}
+
+func (p *TSimpleJSONProtocol) ReadBinary() ([]byte, error) {
+	var v []byte
+	if err := p.ParsePreValue(); err != nil {
+		return nil, err
+	}
+	f, _ := p.reader.Peek(1)
+	if len(f) > 0 && f[0] == JSON_QUOTE {
+		p.reader.ReadByte()
+		value, err := p.ParseBase64EncodedBody()
+		v = value
+		if err != nil {
+			return v, err
+		}
+	} else if len(f) > 0 && f[0] == JSON_NULL[0] {
+		b := make([]byte, len(JSON_NULL))
+		_, err := p.reader.Read(b)
+		if err != nil {
+			return v, NewTProtocolException(err)
+		}
+		if string(b) != string(JSON_NULL) {
+			e := fmt.Errorf("Expected a JSON string, found unquoted data started with %s", string(b))
+			return v, NewTProtocolExceptionWithType(INVALID_DATA, e)
+		}
+	} else {
+		e := fmt.Errorf("Expected a JSON string, found unquoted data started with %s", string(f))
+		return v, NewTProtocolExceptionWithType(INVALID_DATA, e)
+	}
+
+	return v, p.ParsePostValue()
+}
+
+func (p *TSimpleJSONProtocol) Flush() (err error) {
+	return NewTProtocolException(p.writer.Flush())
+}
+
+func (p *TSimpleJSONProtocol) Skip(fieldType TType) (err error) {
+	return SkipDefaultDepth(p, fieldType)
+}
+
+func (p *TSimpleJSONProtocol) Transport() TTransport {
+	return p.trans
+}
+
+func (p *TSimpleJSONProtocol) OutputPreValue() error {
+	cxt := _ParseContext(p.dumpContext[len(p.dumpContext)-1])
+	switch cxt {
+	case _CONTEXT_IN_LIST, _CONTEXT_IN_OBJECT_NEXT_KEY:
+		if _, e := p.write(JSON_COMMA); e != nil {
+			return NewTProtocolException(e)
+		}
+		break
+	case _CONTEXT_IN_OBJECT_NEXT_VALUE:
+		if _, e := p.write(JSON_COLON); e != nil {
+			return NewTProtocolException(e)
+		}
+		break
+	}
+	return nil
+}
+
+func (p *TSimpleJSONProtocol) OutputPostValue() error {
+	cxt := _ParseContext(p.dumpContext[len(p.dumpContext)-1])
+	switch cxt {
+	case _CONTEXT_IN_LIST_FIRST:
+		p.dumpContext = p.dumpContext[:len(p.dumpContext)-1]
+		p.dumpContext = append(p.dumpContext, int(_CONTEXT_IN_LIST))
+		break
+	case _CONTEXT_IN_OBJECT_FIRST:
+		p.dumpContext = p.dumpContext[:len(p.dumpContext)-1]
+		p.dumpContext = append(p.dumpContext, int(_CONTEXT_IN_OBJECT_NEXT_VALUE))
+		break
+	case _CONTEXT_IN_OBJECT_NEXT_KEY:
+		p.dumpContext = p.dumpContext[:len(p.dumpContext)-1]
+		p.dumpContext = append(p.dumpContext, int(_CONTEXT_IN_OBJECT_NEXT_VALUE))
+		break
+	case _CONTEXT_IN_OBJECT_NEXT_VALUE:
+		p.dumpContext = p.dumpContext[:len(p.dumpContext)-1]
+		p.dumpContext = append(p.dumpContext, int(_CONTEXT_IN_OBJECT_NEXT_KEY))
+		break
+	}
+	return nil
+}
+
+func (p *TSimpleJSONProtocol) OutputBool(value bool) error {
+	if e := p.OutputPreValue(); e != nil {
+		return e
+	}
+	var v string
+	if value {
+		v = string(JSON_TRUE)
+	} else {
+		v = string(JSON_FALSE)
+	}
+	switch _ParseContext(p.dumpContext[len(p.dumpContext)-1]) {
+	case _CONTEXT_IN_OBJECT_FIRST, _CONTEXT_IN_OBJECT_NEXT_KEY:
+		v = jsonQuote(v)
+	default:
+	}
+	if e := p.OutputStringData(v); e != nil {
+		return e
+	}
+	return p.OutputPostValue()
+}
+
+func (p *TSimpleJSONProtocol) OutputNull() error {
+	if e := p.OutputPreValue(); e != nil {
+		return e
+	}
+	if _, e := p.write(JSON_NULL); e != nil {
+		return NewTProtocolException(e)
+	}
+	return p.OutputPostValue()
+}
+
+func (p *TSimpleJSONProtocol) OutputF64(value float64) error {
+	if e := p.OutputPreValue(); e != nil {
+		return e
+	}
+	var v string
+	if math.IsNaN(value) {
+		v = string(JSON_QUOTE) + JSON_NAN + string(JSON_QUOTE)
+	} else if math.IsInf(value, 1) {
+		v = string(JSON_QUOTE) + JSON_INFINITY + string(JSON_QUOTE)
+	} else if math.IsInf(value, -1) {
+		v = string(JSON_QUOTE) + JSON_NEGATIVE_INFINITY + string(JSON_QUOTE)
+	} else {
+		v = strconv.FormatFloat(value, 'g', -1, 64)
+		switch _ParseContext(p.dumpContext[len(p.dumpContext)-1]) {
+		case _CONTEXT_IN_OBJECT_FIRST, _CONTEXT_IN_OBJECT_NEXT_KEY:
+			v = string(JSON_QUOTE) + v + string(JSON_QUOTE)
+		default:
+		}
+	}
+	if e := p.OutputStringData(v); e != nil {
+		return e
+	}
+	return p.OutputPostValue()
+}
+
+func (p *TSimpleJSONProtocol) OutputI64(value int64) error {
+	if e := p.OutputPreValue(); e != nil {
+		return e
+	}
+	v := strconv.FormatInt(value, 10)
+	switch _ParseContext(p.dumpContext[len(p.dumpContext)-1]) {
+	case _CONTEXT_IN_OBJECT_FIRST, _CONTEXT_IN_OBJECT_NEXT_KEY:
+		v = jsonQuote(v)
+	default:
+	}
+	if e := p.OutputStringData(v); e != nil {
+		return e
+	}
+	return p.OutputPostValue()
+}
+
+func (p *TSimpleJSONProtocol) OutputString(s string) error {
+	if e := p.OutputPreValue(); e != nil {
+		return e
+	}
+	if e := p.OutputStringData(jsonQuote(s)); e != nil {
+		return e
+	}
+	return p.OutputPostValue()
+}
+
+func (p *TSimpleJSONProtocol) OutputStringData(s string) error {
+	_, e := p.write([]byte(s))
+	return NewTProtocolException(e)
+}
+
+func (p *TSimpleJSONProtocol) OutputObjectBegin() error {
+	if e := p.OutputPreValue(); e != nil {
+		return e
+	}
+	if _, e := p.write(JSON_LBRACE); e != nil {
+		return NewTProtocolException(e)
+	}
+	p.dumpContext = append(p.dumpContext, int(_CONTEXT_IN_OBJECT_FIRST))
+	return nil
+}
+
+func (p *TSimpleJSONProtocol) OutputObjectEnd() error {
+	if _, e := p.write(JSON_RBRACE); e != nil {
+		return NewTProtocolException(e)
+	}
+	p.dumpContext = p.dumpContext[:len(p.dumpContext)-1]
+	if e := p.OutputPostValue(); e != nil {
+		return e
+	}
+	return nil
+}
+
+func (p *TSimpleJSONProtocol) OutputListBegin() error {
+	if e := p.OutputPreValue(); e != nil {
+		return e
+	}
+	if _, e := p.write(JSON_LBRACKET); e != nil {
+		return NewTProtocolException(e)
+	}
+	p.dumpContext = append(p.dumpContext, int(_CONTEXT_IN_LIST_FIRST))
+	return nil
+}
+
+func (p *TSimpleJSONProtocol) OutputListEnd() error {
+	if _, e := p.write(JSON_RBRACKET); e != nil {
+		return NewTProtocolException(e)
+	}
+	p.dumpContext = p.dumpContext[:len(p.dumpContext)-1]
+	if e := p.OutputPostValue(); e != nil {
+		return e
+	}
+	return nil
+}
+
+func (p *TSimpleJSONProtocol) OutputElemListBegin(elemType TType, size int) error {
+	if e := p.OutputListBegin(); e != nil {
+		return e
+	}
+	if e := p.WriteByte(int8(elemType)); e != nil {
+		return e
+	}
+	if e := p.WriteI64(int64(size)); e != nil {
+		return e
+	}
+	return nil
+}
+
+func (p *TSimpleJSONProtocol) ParsePreValue() error {
+	if e := p.readNonSignificantWhitespace(); e != nil {
+		return NewTProtocolException(e)
+	}
+	cxt := _ParseContext(p.parseContextStack[len(p.parseContextStack)-1])
+	b, _ := p.reader.Peek(1)
+	switch cxt {
+	case _CONTEXT_IN_LIST:
+		if len(b) > 0 {
+			switch b[0] {
+			case JSON_RBRACKET[0]:
+				return nil
+			case JSON_COMMA[0]:
+				p.reader.ReadByte()
+				if e := p.readNonSignificantWhitespace(); e != nil {
+					return NewTProtocolException(e)
+				}
+				return nil
+			default:
+				e := fmt.Errorf("Expected \"]\" or \",\" in list context, but found \"%s\"", string(b))
+				return NewTProtocolExceptionWithType(INVALID_DATA, e)
+			}
+		}
+		break
+	case _CONTEXT_IN_OBJECT_NEXT_KEY:
+		if len(b) > 0 {
+			switch b[0] {
+			case JSON_RBRACE[0]:
+				return nil
+			case JSON_COMMA[0]:
+				p.reader.ReadByte()
+				if e := p.readNonSignificantWhitespace(); e != nil {
+					return NewTProtocolException(e)
+				}
+				return nil
+			default:
+				e := fmt.Errorf("Expected \"}\" or \",\" in object context, but found \"%s\"", string(b))
+				return NewTProtocolExceptionWithType(INVALID_DATA, e)
+			}
+		}
+		break
+	case _CONTEXT_IN_OBJECT_NEXT_VALUE:
+		if len(b) > 0 {
+			switch b[0] {
+			case JSON_COLON[0]:
+				p.reader.ReadByte()
+				if e := p.readNonSignificantWhitespace(); e != nil {
+					return NewTProtocolException(e)
+				}
+				return nil
+			default:
+				e := fmt.Errorf("Expected \":\" in object context, but found \"%s\"", string(b))
+				return NewTProtocolExceptionWithType(INVALID_DATA, e)
+			}
+		}
+		break
+	}
+	return nil
+}
+
+func (p *TSimpleJSONProtocol) ParsePostValue() error {
+	if e := p.readNonSignificantWhitespace(); e != nil {
+		return NewTProtocolException(e)
+	}
+	cxt := _ParseContext(p.parseContextStack[len(p.parseContextStack)-1])
+	switch cxt {
+	case _CONTEXT_IN_LIST_FIRST:
+		p.parseContextStack = p.parseContextStack[:len(p.parseContextStack)-1]
+		p.parseContextStack = append(p.parseContextStack, int(_CONTEXT_IN_LIST))
+		break
+	case _CONTEXT_IN_OBJECT_FIRST, _CONTEXT_IN_OBJECT_NEXT_KEY:
+		p.parseContextStack = p.parseContextStack[:len(p.parseContextStack)-1]
+		p.parseContextStack = append(p.parseContextStack, int(_CONTEXT_IN_OBJECT_NEXT_VALUE))
+		break
+	case _CONTEXT_IN_OBJECT_NEXT_VALUE:
+		p.parseContextStack = p.parseContextStack[:len(p.parseContextStack)-1]
+		p.parseContextStack = append(p.parseContextStack, int(_CONTEXT_IN_OBJECT_NEXT_KEY))
+		break
+	}
+	return nil
+}
+
+func (p *TSimpleJSONProtocol) readNonSignificantWhitespace() error {
+	for {
+		b, _ := p.reader.Peek(1)
+		if len(b) < 1 {
+			return nil
+		}
+		switch b[0] {
+		case ' ', '\r', '\n', '\t':
+			p.reader.ReadByte()
+			continue
+		default:
+			break
+		}
+		break
+	}
+	return nil
+}
+
+func (p *TSimpleJSONProtocol) ParseStringBody() (string, error) {
+	line, err := p.reader.ReadString(JSON_QUOTE)
+	if err != nil {
+		return "", NewTProtocolException(err)
+	}
+	l := len(line)
+	// count number of escapes to see if we need to keep going
+	i := 1
+	for ; i < l; i++ {
+		if line[l-i-1] != '\\' {
+			break
+		}
+	}
+	if i&0x01 == 1 {
+		v, ok := jsonUnquote(string(JSON_QUOTE) + line)
+		if !ok {
+			return "", NewTProtocolException(err)
+		}
+		return v, nil
+	}
+	s, err := p.ParseQuotedStringBody()
+	if err != nil {
+		return "", NewTProtocolException(err)
+	}
+	str := string(JSON_QUOTE) + line + s
+	v, ok := jsonUnquote(str)
+	if !ok {
+		e := fmt.Errorf("Unable to parse as JSON string %s", str)
+		return "", NewTProtocolExceptionWithType(INVALID_DATA, e)
+	}
+	return v, nil
+}
+
+func (p *TSimpleJSONProtocol) ParseQuotedStringBody() (string, error) {
+	line, err := p.reader.ReadString(JSON_QUOTE)
+	if err != nil {
+		return "", NewTProtocolException(err)
+	}
+	l := len(line)
+	// count number of escapes to see if we need to keep going
+	i := 1
+	for ; i < l; i++ {
+		if line[l-i-1] != '\\' {
+			break
+		}
+	}
+	if i&0x01 == 1 {
+		return line, nil
+	}
+	s, err := p.ParseQuotedStringBody()
+	if err != nil {
+		return "", NewTProtocolException(err)
+	}
+	v := line + s
+	return v, nil
+}
+
+func (p *TSimpleJSONProtocol) ParseBase64EncodedBody() ([]byte, error) {
+	line, err := p.reader.ReadBytes(JSON_QUOTE)
+	if err != nil {
+		return line, NewTProtocolException(err)
+	}
+	line2 := line[0 : len(line)-1]
+	l := len(line2)
+	if (l % 4) != 0 {
+		pad := 4 - (l % 4)
+		fill := [...]byte{'=', '=', '='}
+		line2 = append(line2, fill[:pad]...)
+		l = len(line2)
+	}
+	output := make([]byte, base64.StdEncoding.DecodedLen(l))
+	n, err := base64.StdEncoding.Decode(output, line2)
+	return output[0:n], NewTProtocolException(err)
+}
+
+func (p *TSimpleJSONProtocol) ParseI64() (int64, bool, error) {
+	if err := p.ParsePreValue(); err != nil {
+		return 0, false, err
+	}
+	var value int64
+	var isnull bool
+	if p.safePeekContains(JSON_NULL) {
+		p.reader.Read(make([]byte, len(JSON_NULL)))
+		isnull = true
+	} else {
+		num, err := p.readNumeric()
+		isnull = (num == nil)
+		if !isnull {
+			value = num.Int64()
+		}
+		if err != nil {
+			return value, isnull, err
+		}
+	}
+	return value, isnull, p.ParsePostValue()
+}
+
+func (p *TSimpleJSONProtocol) ParseF64() (float64, bool, error) {
+	if err := p.ParsePreValue(); err != nil {
+		return 0, false, err
+	}
+	var value float64
+	var isnull bool
+	if p.safePeekContains(JSON_NULL) {
+		p.reader.Read(make([]byte, len(JSON_NULL)))
+		isnull = true
+	} else {
+		num, err := p.readNumeric()
+		isnull = (num == nil)
+		if !isnull {
+			value = num.Float64()
+		}
+		if err != nil {
+			return value, isnull, err
+		}
+	}
+	return value, isnull, p.ParsePostValue()
+}
+
+func (p *TSimpleJSONProtocol) ParseObjectStart() (bool, error) {
+	if err := p.ParsePreValue(); err != nil {
+		return false, err
+	}
+	var b []byte
+	b, err := p.reader.Peek(1)
+	if err != nil {
+		return false, err
+	}
+	if len(b) > 0 && b[0] == JSON_LBRACE[0] {
+		p.reader.ReadByte()
+		p.parseContextStack = append(p.parseContextStack, int(_CONTEXT_IN_OBJECT_FIRST))
+		return false, nil
+	} else if p.safePeekContains(JSON_NULL) {
+		return true, nil
+	}
+	e := fmt.Errorf("Expected '{' or null, but found '%s'", string(b))
+	return false, NewTProtocolExceptionWithType(INVALID_DATA, e)
+}
+
+func (p *TSimpleJSONProtocol) ParseObjectEnd() error {
+	if isNull, err := p.readIfNull(); isNull || err != nil {
+		return err
+	}
+	cxt := _ParseContext(p.parseContextStack[len(p.parseContextStack)-1])
+	if (cxt != _CONTEXT_IN_OBJECT_FIRST) && (cxt != _CONTEXT_IN_OBJECT_NEXT_KEY) {
+		e := fmt.Errorf("Expected to be in the Object Context, but not in Object Context (%d)", cxt)
+		return NewTProtocolExceptionWithType(INVALID_DATA, e)
+	}
+	line, err := p.reader.ReadString(JSON_RBRACE[0])
+	if err != nil {
+		return NewTProtocolException(err)
+	}
+	for _, char := range line {
+		switch char {
+		default:
+			e := fmt.Errorf("Expecting end of object \"}\", but found: \"%s\"", line)
+			return NewTProtocolExceptionWithType(INVALID_DATA, e)
+		case ' ', '\n', '\r', '\t', '}':
+			break
+		}
+	}
+	p.parseContextStack = p.parseContextStack[:len(p.parseContextStack)-1]
+	return p.ParsePostValue()
+}
+
+func (p *TSimpleJSONProtocol) ParseListBegin() (isNull bool, err error) {
+	if e := p.ParsePreValue(); e != nil {
+		return false, e
+	}
+	var b []byte
+	b, err = p.reader.Peek(1)
+	if err != nil {
+		return false, err
+	}
+	if len(b) >= 1 && b[0] == JSON_LBRACKET[0] {
+		p.parseContextStack = append(p.parseContextStack, int(_CONTEXT_IN_LIST_FIRST))
+		p.reader.ReadByte()
+		isNull = false
+	} else if p.safePeekContains(JSON_NULL) {
+		isNull = true
+	} else {
+		err = fmt.Errorf("Expected \"null\" or \"[\", received %q", b)
+	}
+	return isNull, NewTProtocolExceptionWithType(INVALID_DATA, err)
+}
+
+func (p *TSimpleJSONProtocol) ParseElemListBegin() (elemType TType, size int, e error) {
+	if isNull, e := p.ParseListBegin(); isNull || e != nil {
+		return VOID, 0, e
+	}
+	bElemType, err := p.ReadByte()
+	elemType = TType(bElemType)
+	if err != nil {
+		return elemType, size, err
+	}
+	nSize, err2 := p.ReadI64()
+	size = int(nSize)
+	return elemType, size, err2
+}
+
+func (p *TSimpleJSONProtocol) ParseListEnd() error {
+	if isNull, err := p.readIfNull(); isNull || err != nil {
+		return err
+	}
+	cxt := _ParseContext(p.parseContextStack[len(p.parseContextStack)-1])
+	if cxt != _CONTEXT_IN_LIST {
+		e := fmt.Errorf("Expected to be in the List Context, but not in List Context (%d)", cxt)
+		return NewTProtocolExceptionWithType(INVALID_DATA, e)
+	}
+	line, err := p.reader.ReadString(JSON_RBRACKET[0])
+	if err != nil {
+		return NewTProtocolException(err)
+	}
+	for _, char := range line {
+		switch char {
+		default:
+			e := fmt.Errorf("Expecting end of list \"]\", but found: \"%s\"", line)
+			return NewTProtocolExceptionWithType(INVALID_DATA, e)
+		case ' ', '\n', '\r', '\t', rune(JSON_RBRACKET[0]):
+			break
+		}
+	}
+	p.parseContextStack = p.parseContextStack[:len(p.parseContextStack)-1]
+	if _ParseContext(p.parseContextStack[len(p.parseContextStack)-1]) == _CONTEXT_IN_TOPLEVEL {
+		return nil
+	}
+	return p.ParsePostValue()
+}
+
+func (p *TSimpleJSONProtocol) readSingleValue() (interface{}, TType, error) {
+	e := p.readNonSignificantWhitespace()
+	if e != nil {
+		return nil, VOID, NewTProtocolException(e)
+	}
+	b, e := p.reader.Peek(1)
+	if len(b) > 0 {
+		c := b[0]
+		switch c {
+		case JSON_NULL[0]:
+			buf := make([]byte, len(JSON_NULL))
+			_, e := p.reader.Read(buf)
+			if e != nil {
+				return nil, VOID, NewTProtocolException(e)
+			}
+			if string(JSON_NULL) != string(buf) {
+				e = mismatch(string(JSON_NULL), string(buf))
+				return nil, VOID, NewTProtocolExceptionWithType(INVALID_DATA, e)
+			}
+			return nil, VOID, nil
+		case JSON_QUOTE:
+			p.reader.ReadByte()
+			v, e := p.ParseStringBody()
+			if e != nil {
+				return v, UTF8, NewTProtocolException(e)
+			}
+			if v == JSON_INFINITY {
+				return INFINITY, DOUBLE, nil
+			} else if v == JSON_NEGATIVE_INFINITY {
+				return NEGATIVE_INFINITY, DOUBLE, nil
+			} else if v == JSON_NAN {
+				return NAN, DOUBLE, nil
+			}
+			return v, UTF8, nil
+		case JSON_TRUE[0]:
+			buf := make([]byte, len(JSON_TRUE))
+			_, e := p.reader.Read(buf)
+			if e != nil {
+				return true, BOOL, NewTProtocolException(e)
+			}
+			if string(JSON_TRUE) != string(buf) {
+				e := mismatch(string(JSON_TRUE), string(buf))
+				return true, BOOL, NewTProtocolExceptionWithType(INVALID_DATA, e)
+			}
+			return true, BOOL, nil
+		case JSON_FALSE[0]:
+			buf := make([]byte, len(JSON_FALSE))
+			_, e := p.reader.Read(buf)
+			if e != nil {
+				return false, BOOL, NewTProtocolException(e)
+			}
+			if string(JSON_FALSE) != string(buf) {
+				e := mismatch(string(JSON_FALSE), string(buf))
+				return false, BOOL, NewTProtocolExceptionWithType(INVALID_DATA, e)
+			}
+			return false, BOOL, nil
+		case JSON_LBRACKET[0]:
+			_, e := p.reader.ReadByte()
+			return make([]interface{}, 0), LIST, NewTProtocolException(e)
+		case JSON_LBRACE[0]:
+			_, e := p.reader.ReadByte()
+			return make(map[string]interface{}), STRUCT, NewTProtocolException(e)
+		case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'e', 'E', '.', '+', '-', JSON_INFINITY[0], JSON_NAN[0]:
+			// assume numeric
+			v, e := p.readNumeric()
+			return v, DOUBLE, e
+		default:
+			e := fmt.Errorf("Expected element in list but found '%s' while parsing JSON.", string(c))
+			return nil, VOID, NewTProtocolExceptionWithType(INVALID_DATA, e)
+		}
+	}
+	e = fmt.Errorf("Cannot read a single element while parsing JSON.")
+	return nil, VOID, NewTProtocolExceptionWithType(INVALID_DATA, e)
+
+}
+
+func (p *TSimpleJSONProtocol) readIfNull() (bool, error) {
+	cont := true
+	for cont {
+		b, _ := p.reader.Peek(1)
+		if len(b) < 1 {
+			return false, nil
+		}
+		switch b[0] {
+		default:
+			return false, nil
+		case JSON_NULL[0]:
+			cont = false
+			break
+		case ' ', '\n', '\r', '\t':
+			p.reader.ReadByte()
+			break
+		}
+	}
+	if p.safePeekContains(JSON_NULL) {
+		p.reader.Read(make([]byte, len(JSON_NULL)))
+		return true, nil
+	}
+	return false, nil
+}
+
+func (p *TSimpleJSONProtocol) readQuoteIfNext() {
+	b, _ := p.reader.Peek(1)
+	if len(b) > 0 && b[0] == JSON_QUOTE {
+		p.reader.ReadByte()
+	}
+}
+
+func (p *TSimpleJSONProtocol) readNumeric() (Numeric, error) {
+	isNull, err := p.readIfNull()
+	if isNull || err != nil {
+		return NUMERIC_NULL, err
+	}
+	hasDecimalPoint := false
+	nextCanBeSign := true
+	hasE := false
+	MAX_LEN := 40
+	buf := bytes.NewBuffer(make([]byte, 0, MAX_LEN))
+	continueFor := true
+	inQuotes := false
+	for continueFor {
+		c, err := p.reader.ReadByte()
+		if err != nil {
+			if err == io.EOF {
+				break
+			}
+			return NUMERIC_NULL, NewTProtocolException(err)
+		}
+		switch c {
+		case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
+			buf.WriteByte(c)
+			nextCanBeSign = false
+		case '.':
+			if hasDecimalPoint {
+				e := fmt.Errorf("Unable to parse number with multiple decimal points '%s.'", buf.String())
+				return NUMERIC_NULL, NewTProtocolExceptionWithType(INVALID_DATA, e)
+			}
+			if hasE {
+				e := fmt.Errorf("Unable to parse number with decimal points in the exponent '%s.'", buf.String())
+				return NUMERIC_NULL, NewTProtocolExceptionWithType(INVALID_DATA, e)
+			}
+			buf.WriteByte(c)
+			hasDecimalPoint, nextCanBeSign = true, false
+		case 'e', 'E':
+			if hasE {
+				e := fmt.Errorf("Unable to parse number with multiple exponents '%s%c'", buf.String(), c)
+				return NUMERIC_NULL, NewTProtocolExceptionWithType(INVALID_DATA, e)
+			}
+			buf.WriteByte(c)
+			hasE, nextCanBeSign = true, true
+		case '-', '+':
+			if !nextCanBeSign {
+				e := fmt.Errorf("Negative sign within number")
+				return NUMERIC_NULL, NewTProtocolExceptionWithType(INVALID_DATA, e)
+			}
+			buf.WriteByte(c)
+			nextCanBeSign = false
+		case ' ', 0, '\t', '\n', '\r', JSON_RBRACE[0], JSON_RBRACKET[0], JSON_COMMA[0], JSON_COLON[0]:
+			p.reader.UnreadByte()
+			continueFor = false
+		case JSON_NAN[0]:
+			if buf.Len() == 0 {
+				buffer := make([]byte, len(JSON_NAN))
+				buffer[0] = c
+				_, e := p.reader.Read(buffer[1:])
+				if e != nil {
+					return NUMERIC_NULL, NewTProtocolException(e)
+				}
+				if JSON_NAN != string(buffer) {
+					e := mismatch(JSON_NAN, string(buffer))
+					return NUMERIC_NULL, NewTProtocolExceptionWithType(INVALID_DATA, e)
+				}
+				if inQuotes {
+					p.readQuoteIfNext()
+				}
+				return NAN, nil
+			} else {
+				e := fmt.Errorf("Unable to parse number starting with character '%c'", c)
+				return NUMERIC_NULL, NewTProtocolExceptionWithType(INVALID_DATA, e)
+			}
+		case JSON_INFINITY[0]:
+			if buf.Len() == 0 || (buf.Len() == 1 && buf.Bytes()[0] == '+') {
+				buffer := make([]byte, len(JSON_INFINITY))
+				buffer[0] = c
+				_, e := p.reader.Read(buffer[1:])
+				if e != nil {
+					return NUMERIC_NULL, NewTProtocolException(e)
+				}
+				if JSON_INFINITY != string(buffer) {
+					e := mismatch(JSON_INFINITY, string(buffer))
+					return NUMERIC_NULL, NewTProtocolExceptionWithType(INVALID_DATA, e)
+				}
+				if inQuotes {
+					p.readQuoteIfNext()
+				}
+				return INFINITY, nil
+			} else if buf.Len() == 1 && buf.Bytes()[0] == JSON_NEGATIVE_INFINITY[0] {
+				buffer := make([]byte, len(JSON_NEGATIVE_INFINITY))
+				buffer[0] = JSON_NEGATIVE_INFINITY[0]
+				buffer[1] = c
+				_, e := p.reader.Read(buffer[2:])
+				if e != nil {
+					return NUMERIC_NULL, NewTProtocolException(e)
+				}
+				if JSON_NEGATIVE_INFINITY != string(buffer) {
+					e := mismatch(JSON_NEGATIVE_INFINITY, string(buffer))
+					return NUMERIC_NULL, NewTProtocolExceptionWithType(INVALID_DATA, e)
+				}
+				if inQuotes {
+					p.readQuoteIfNext()
+				}
+				return NEGATIVE_INFINITY, nil
+			} else {
+				e := fmt.Errorf("Unable to parse number starting with character '%c' due to existing buffer %s", c, buf.String())
+				return NUMERIC_NULL, NewTProtocolExceptionWithType(INVALID_DATA, e)
+			}
+		case JSON_QUOTE:
+			if !inQuotes {
+				inQuotes = true
+			} else {
+				break
+			}
+		default:
+			e := fmt.Errorf("Unable to parse number starting with character '%c'", c)
+			return NUMERIC_NULL, NewTProtocolExceptionWithType(INVALID_DATA, e)
+		}
+	}
+	if buf.Len() == 0 {
+		e := fmt.Errorf("Unable to parse number from empty string ''")
+		return NUMERIC_NULL, NewTProtocolExceptionWithType(INVALID_DATA, e)
+	}
+	return NewNumericFromJSONString(buf.String(), false), nil
+}
+
+// Safely peeks into the buffer, reading only what is necessary
+func (p *TSimpleJSONProtocol) safePeekContains(b []byte) bool {
+	for i := 0; i < len(b); i++ {
+		a, _ := p.reader.Peek(i + 1)
+		if len(a) == 0 || a[i] != b[i] {
+			return false
+		}
+	}
+	return true
+}
+
+// Reset the context stack to its initial state.
+func (p *TSimpleJSONProtocol) resetContextStack() {
+	p.parseContextStack = []int{int(_CONTEXT_IN_TOPLEVEL)}
+	p.dumpContext = []int{int(_CONTEXT_IN_TOPLEVEL)}
+}
+
+func (p *TSimpleJSONProtocol) write(b []byte) (int, error) {
+	n, err := p.writer.Write(b)
+	if err != nil {
+		p.writer.Reset(p.trans) // THRIFT-3735
+	}
+	return n, err
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/transport.go b/vendor/github.com/uber/jaeger-client-go/thrift/transport.go
new file mode 100644
index 000000000..453899651
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/transport.go
@@ -0,0 +1,68 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"errors"
+	"io"
+)
+
+var errTransportInterrupted = errors.New("Transport Interrupted")
+
+type Flusher interface {
+	Flush() (err error)
+}
+
+type ReadSizeProvider interface {
+	RemainingBytes() (num_bytes uint64)
+}
+
+
+// Encapsulates the I/O layer
+type TTransport interface {
+	io.ReadWriteCloser
+	Flusher
+	ReadSizeProvider
+
+	// Opens the transport for communication
+	Open() error
+
+	// Returns true if the transport is open
+	IsOpen() bool
+}
+
+type stringWriter interface {
+	WriteString(s string) (n int, err error)
+}
+
+
+// This is "enchanced" transport with extra capabilities. You need to use one of these
+// to construct protocol.
+// Notably, TSocket does not implement this interface, and it is always a mistake to use
+// TSocket directly in protocol.
+type TRichTransport interface {
+	io.ReadWriter
+	io.ByteReader
+	io.ByteWriter
+	stringWriter
+	Flusher
+	ReadSizeProvider
+}
+
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/transport_exception.go b/vendor/github.com/uber/jaeger-client-go/thrift/transport_exception.go
new file mode 100644
index 000000000..9505b4461
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/transport_exception.go
@@ -0,0 +1,90 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"errors"
+	"io"
+)
+
+type timeoutable interface {
+	Timeout() bool
+}
+
+// Thrift Transport exception
+type TTransportException interface {
+	TException
+	TypeId() int
+	Err() error
+}
+
+const (
+	UNKNOWN_TRANSPORT_EXCEPTION = 0
+	NOT_OPEN                    = 1
+	ALREADY_OPEN                = 2
+	TIMED_OUT                   = 3
+	END_OF_FILE                 = 4
+)
+
+type tTransportException struct {
+	typeId int
+	err    error
+}
+
+func (p *tTransportException) TypeId() int {
+	return p.typeId
+}
+
+func (p *tTransportException) Error() string {
+	return p.err.Error()
+}
+
+func (p *tTransportException) Err() error {
+	return p.err
+}
+
+func NewTTransportException(t int, e string) TTransportException {
+	return &tTransportException{typeId: t, err: errors.New(e)}
+}
+
+func NewTTransportExceptionFromError(e error) TTransportException {
+	if e == nil {
+		return nil
+	}
+
+	if t, ok := e.(TTransportException); ok {
+		return t
+	}
+
+	switch v := e.(type) {
+	case TTransportException:
+		return v
+	case timeoutable:
+		if v.Timeout() {
+			return &tTransportException{typeId: TIMED_OUT, err: e}
+		}
+	}
+
+	if e == io.EOF {
+		return &tTransportException{typeId: END_OF_FILE, err: e}
+	}
+
+	return &tTransportException{typeId: UNKNOWN_TRANSPORT_EXCEPTION, err: e}
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/transport_factory.go b/vendor/github.com/uber/jaeger-client-go/thrift/transport_factory.go
new file mode 100644
index 000000000..533d1b437
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/transport_factory.go
@@ -0,0 +1,39 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+// Factory class used to create wrapped instance of Transports.
+// This is used primarily in servers, which get Transports from
+// a ServerTransport and then may want to mutate them (i.e. create
+// a BufferedTransport from the underlying base transport)
+type TTransportFactory interface {
+	GetTransport(trans TTransport) TTransport
+}
+
+type tTransportFactory struct{}
+
+// Return a wrapped instance of the base Transport.
+func (p *tTransportFactory) GetTransport(trans TTransport) TTransport {
+	return trans
+}
+
+func NewTTransportFactory() TTransportFactory {
+	return &tTransportFactory{}
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/type.go b/vendor/github.com/uber/jaeger-client-go/thrift/type.go
new file mode 100644
index 000000000..4292ffcad
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/type.go
@@ -0,0 +1,69 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+// Type constants in the Thrift protocol
+type TType byte
+
+const (
+	STOP   = 0
+	VOID   = 1
+	BOOL   = 2
+	BYTE   = 3
+	I08    = 3
+	DOUBLE = 4
+	I16    = 6
+	I32    = 8
+	I64    = 10
+	STRING = 11
+	UTF7   = 11
+	STRUCT = 12
+	MAP    = 13
+	SET    = 14
+	LIST   = 15
+	UTF8   = 16
+	UTF16  = 17
+	//BINARY = 18   wrong and unusued
+)
+
+var typeNames = map[int]string{
+	STOP:   "STOP",
+	VOID:   "VOID",
+	BOOL:   "BOOL",
+	BYTE:   "BYTE",
+	DOUBLE: "DOUBLE",
+	I16:    "I16",
+	I32:    "I32",
+	I64:    "I64",
+	STRING: "STRING",
+	STRUCT: "STRUCT",
+	MAP:    "MAP",
+	SET:    "SET",
+	LIST:   "LIST",
+	UTF8:   "UTF8",
+	UTF16:  "UTF16",
+}
+
+func (p TType) String() string {
+	if s, ok := typeNames[int(p)]; ok {
+		return s
+	}
+	return "Unknown"
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/tracer.go b/vendor/github.com/uber/jaeger-client-go/tracer.go
new file mode 100644
index 000000000..198c32eb4
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/tracer.go
@@ -0,0 +1,431 @@
+// Copyright (c) 2017-2018 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"reflect"
+	"strconv"
+	"sync"
+	"time"
+
+	"github.com/opentracing/opentracing-go"
+	"github.com/opentracing/opentracing-go/ext"
+
+	"github.com/uber/jaeger-client-go/internal/baggage"
+	"github.com/uber/jaeger-client-go/internal/throttler"
+	"github.com/uber/jaeger-client-go/log"
+	"github.com/uber/jaeger-client-go/utils"
+)
+
+// Tracer implements opentracing.Tracer.
+type Tracer struct {
+	serviceName string
+	hostIPv4    uint32 // this is for zipkin endpoint conversion
+
+	sampler  Sampler
+	reporter Reporter
+	metrics  Metrics
+	logger   log.Logger
+
+	timeNow      func() time.Time
+	randomNumber func() uint64
+
+	options struct {
+		poolSpans            bool
+		gen128Bit            bool // whether to generate 128bit trace IDs
+		zipkinSharedRPCSpan  bool
+		highTraceIDGenerator func() uint64 // custom high trace ID generator
+		maxTagValueLength    int
+		// more options to come
+	}
+	// pool for Span objects
+	spanPool sync.Pool
+
+	injectors  map[interface{}]Injector
+	extractors map[interface{}]Extractor
+
+	observer compositeObserver
+
+	tags    []Tag
+	process Process
+
+	baggageRestrictionManager baggage.RestrictionManager
+	baggageSetter             *baggageSetter
+
+	debugThrottler throttler.Throttler
+}
+
+// NewTracer creates Tracer implementation that reports tracing to Jaeger.
+// The returned io.Closer can be used in shutdown hooks to ensure that the internal
+// queue of the Reporter is drained and all buffered spans are submitted to collectors.
+func NewTracer(
+	serviceName string,
+	sampler Sampler,
+	reporter Reporter,
+	options ...TracerOption,
+) (opentracing.Tracer, io.Closer) {
+	t := &Tracer{
+		serviceName: serviceName,
+		sampler:     sampler,
+		reporter:    reporter,
+		injectors:   make(map[interface{}]Injector),
+		extractors:  make(map[interface{}]Extractor),
+		metrics:     *NewNullMetrics(),
+		spanPool: sync.Pool{New: func() interface{} {
+			return &Span{}
+		}},
+	}
+
+	for _, option := range options {
+		option(t)
+	}
+
+	// register default injectors/extractors unless they are already provided via options
+	textPropagator := newTextMapPropagator(getDefaultHeadersConfig(), t.metrics)
+	t.addCodec(opentracing.TextMap, textPropagator, textPropagator)
+
+	httpHeaderPropagator := newHTTPHeaderPropagator(getDefaultHeadersConfig(), t.metrics)
+	t.addCodec(opentracing.HTTPHeaders, httpHeaderPropagator, httpHeaderPropagator)
+
+	binaryPropagator := newBinaryPropagator(t)
+	t.addCodec(opentracing.Binary, binaryPropagator, binaryPropagator)
+
+	// TODO remove after TChannel supports OpenTracing
+	interopPropagator := &jaegerTraceContextPropagator{tracer: t}
+	t.addCodec(SpanContextFormat, interopPropagator, interopPropagator)
+
+	zipkinPropagator := &zipkinPropagator{tracer: t}
+	t.addCodec(ZipkinSpanFormat, zipkinPropagator, zipkinPropagator)
+
+	if t.baggageRestrictionManager != nil {
+		t.baggageSetter = newBaggageSetter(t.baggageRestrictionManager, &t.metrics)
+	} else {
+		t.baggageSetter = newBaggageSetter(baggage.NewDefaultRestrictionManager(0), &t.metrics)
+	}
+	if t.debugThrottler == nil {
+		t.debugThrottler = throttler.DefaultThrottler{}
+	}
+
+	if t.randomNumber == nil {
+		rng := utils.NewRand(time.Now().UnixNano())
+		t.randomNumber = func() uint64 {
+			return uint64(rng.Int63())
+		}
+	}
+	if t.timeNow == nil {
+		t.timeNow = time.Now
+	}
+	if t.logger == nil {
+		t.logger = log.NullLogger
+	}
+	// Set tracer-level tags
+	t.tags = append(t.tags, Tag{key: JaegerClientVersionTagKey, value: JaegerClientVersion})
+	if hostname, err := os.Hostname(); err == nil {
+		t.tags = append(t.tags, Tag{key: TracerHostnameTagKey, value: hostname})
+	}
+	if ip, err := utils.HostIP(); err == nil {
+		t.tags = append(t.tags, Tag{key: TracerIPTagKey, value: ip.String()})
+		t.hostIPv4 = utils.PackIPAsUint32(ip)
+	} else {
+		t.logger.Error("Unable to determine this host's IP address: " + err.Error())
+	}
+
+	if t.options.gen128Bit {
+		if t.options.highTraceIDGenerator == nil {
+			t.options.highTraceIDGenerator = t.randomNumber
+		}
+	} else if t.options.highTraceIDGenerator != nil {
+		t.logger.Error("Overriding high trace ID generator but not generating " +
+			"128 bit trace IDs, consider enabling the \"Gen128Bit\" option")
+	}
+	if t.options.maxTagValueLength == 0 {
+		t.options.maxTagValueLength = DefaultMaxTagValueLength
+	}
+	t.process = Process{
+		Service: serviceName,
+		UUID:    strconv.FormatUint(t.randomNumber(), 16),
+		Tags:    t.tags,
+	}
+	if throttler, ok := t.debugThrottler.(ProcessSetter); ok {
+		throttler.SetProcess(t.process)
+	}
+
+	return t, t
+}
+
+// addCodec adds registers injector and extractor for given propagation format if not already defined.
+func (t *Tracer) addCodec(format interface{}, injector Injector, extractor Extractor) {
+	if _, ok := t.injectors[format]; !ok {
+		t.injectors[format] = injector
+	}
+	if _, ok := t.extractors[format]; !ok {
+		t.extractors[format] = extractor
+	}
+}
+
+// StartSpan implements StartSpan() method of opentracing.Tracer.
+func (t *Tracer) StartSpan(
+	operationName string,
+	options ...opentracing.StartSpanOption,
+) opentracing.Span {
+	sso := opentracing.StartSpanOptions{}
+	for _, o := range options {
+		o.Apply(&sso)
+	}
+	return t.startSpanWithOptions(operationName, sso)
+}
+
+func (t *Tracer) startSpanWithOptions(
+	operationName string,
+	options opentracing.StartSpanOptions,
+) opentracing.Span {
+	if options.StartTime.IsZero() {
+		options.StartTime = t.timeNow()
+	}
+
+	// Predicate whether the given span context is a valid reference
+	// which may be used as parent / debug ID / baggage items source
+	isValidReference := func(ctx SpanContext) bool {
+		return ctx.IsValid() || ctx.isDebugIDContainerOnly() || len(ctx.baggage) != 0
+	}
+
+	var references []Reference
+	var parent SpanContext
+	var hasParent bool // need this because `parent` is a value, not reference
+	for _, ref := range options.References {
+		ctx, ok := ref.ReferencedContext.(SpanContext)
+		if !ok {
+			t.logger.Error(fmt.Sprintf(
+				"Reference contains invalid type of SpanReference: %s",
+				reflect.ValueOf(ref.ReferencedContext)))
+			continue
+		}
+		if !isValidReference(ctx) {
+			continue
+		}
+		references = append(references, Reference{Type: ref.Type, Context: ctx})
+		if !hasParent {
+			parent = ctx
+			hasParent = ref.Type == opentracing.ChildOfRef
+		}
+	}
+	if !hasParent && isValidReference(parent) {
+		// If ChildOfRef wasn't found but a FollowFromRef exists, use the context from
+		// the FollowFromRef as the parent
+		hasParent = true
+	}
+
+	rpcServer := false
+	if v, ok := options.Tags[ext.SpanKindRPCServer.Key]; ok {
+		rpcServer = (v == ext.SpanKindRPCServerEnum || v == string(ext.SpanKindRPCServerEnum))
+	}
+
+	var samplerTags []Tag
+	var ctx SpanContext
+	newTrace := false
+	if !hasParent || !parent.IsValid() {
+		newTrace = true
+		ctx.traceID.Low = t.randomID()
+		if t.options.gen128Bit {
+			ctx.traceID.High = t.options.highTraceIDGenerator()
+		}
+		ctx.spanID = SpanID(ctx.traceID.Low)
+		ctx.parentID = 0
+		ctx.flags = byte(0)
+		if hasParent && parent.isDebugIDContainerOnly() && t.isDebugAllowed(operationName) {
+			ctx.flags |= (flagSampled | flagDebug)
+			samplerTags = []Tag{{key: JaegerDebugHeader, value: parent.debugID}}
+		} else if sampled, tags := t.sampler.IsSampled(ctx.traceID, operationName); sampled {
+			ctx.flags |= flagSampled
+			samplerTags = tags
+		}
+	} else {
+		ctx.traceID = parent.traceID
+		if rpcServer && t.options.zipkinSharedRPCSpan {
+			// Support Zipkin's one-span-per-RPC model
+			ctx.spanID = parent.spanID
+			ctx.parentID = parent.parentID
+		} else {
+			ctx.spanID = SpanID(t.randomID())
+			ctx.parentID = parent.spanID
+		}
+		ctx.flags = parent.flags
+	}
+	if hasParent {
+		// copy baggage items
+		if l := len(parent.baggage); l > 0 {
+			ctx.baggage = make(map[string]string, len(parent.baggage))
+			for k, v := range parent.baggage {
+				ctx.baggage[k] = v
+			}
+		}
+	}
+
+	sp := t.newSpan()
+	sp.context = ctx
+	sp.observer = t.observer.OnStartSpan(sp, operationName, options)
+	return t.startSpanInternal(
+		sp,
+		operationName,
+		options.StartTime,
+		samplerTags,
+		options.Tags,
+		newTrace,
+		rpcServer,
+		references,
+	)
+}
+
+// Inject implements Inject() method of opentracing.Tracer
+func (t *Tracer) Inject(ctx opentracing.SpanContext, format interface{}, carrier interface{}) error {
+	c, ok := ctx.(SpanContext)
+	if !ok {
+		return opentracing.ErrInvalidSpanContext
+	}
+	if injector, ok := t.injectors[format]; ok {
+		return injector.Inject(c, carrier)
+	}
+	return opentracing.ErrUnsupportedFormat
+}
+
+// Extract implements Extract() method of opentracing.Tracer
+func (t *Tracer) Extract(
+	format interface{},
+	carrier interface{},
+) (opentracing.SpanContext, error) {
+	if extractor, ok := t.extractors[format]; ok {
+		return extractor.Extract(carrier)
+	}
+	return nil, opentracing.ErrUnsupportedFormat
+}
+
+// Close releases all resources used by the Tracer and flushes any remaining buffered spans.
+func (t *Tracer) Close() error {
+	t.reporter.Close()
+	t.sampler.Close()
+	if mgr, ok := t.baggageRestrictionManager.(io.Closer); ok {
+		mgr.Close()
+	}
+	if throttler, ok := t.debugThrottler.(io.Closer); ok {
+		throttler.Close()
+	}
+	return nil
+}
+
+// Tags returns a slice of tracer-level tags.
+func (t *Tracer) Tags() []opentracing.Tag {
+	tags := make([]opentracing.Tag, len(t.tags))
+	for i, tag := range t.tags {
+		tags[i] = opentracing.Tag{Key: tag.key, Value: tag.value}
+	}
+	return tags
+}
+
+// newSpan returns an instance of a clean Span object.
+// If options.PoolSpans is true, the spans are retrieved from an object pool.
+func (t *Tracer) newSpan() *Span {
+	if !t.options.poolSpans {
+		return &Span{}
+	}
+	sp := t.spanPool.Get().(*Span)
+	sp.context = emptyContext
+	sp.tracer = nil
+	sp.tags = nil
+	sp.logs = nil
+	return sp
+}
+
+func (t *Tracer) startSpanInternal(
+	sp *Span,
+	operationName string,
+	startTime time.Time,
+	internalTags []Tag,
+	tags opentracing.Tags,
+	newTrace bool,
+	rpcServer bool,
+	references []Reference,
+) *Span {
+	sp.tracer = t
+	sp.operationName = operationName
+	sp.startTime = startTime
+	sp.duration = 0
+	sp.references = references
+	sp.firstInProcess = rpcServer || sp.context.parentID == 0
+	if len(tags) > 0 || len(internalTags) > 0 {
+		sp.tags = make([]Tag, len(internalTags), len(tags)+len(internalTags))
+		copy(sp.tags, internalTags)
+		for k, v := range tags {
+			sp.observer.OnSetTag(k, v)
+			if k == string(ext.SamplingPriority) && !setSamplingPriority(sp, v) {
+				continue
+			}
+			sp.setTagNoLocking(k, v)
+		}
+	}
+	// emit metrics
+	if sp.context.IsSampled() {
+		t.metrics.SpansStartedSampled.Inc(1)
+		if newTrace {
+			// We cannot simply check for parentID==0 because in Zipkin model the
+			// server-side RPC span has the exact same trace/span/parent IDs as the
+			// calling client-side span, but obviously the server side span is
+			// no longer a root span of the trace.
+			t.metrics.TracesStartedSampled.Inc(1)
+		} else if sp.firstInProcess {
+			t.metrics.TracesJoinedSampled.Inc(1)
+		}
+	} else {
+		t.metrics.SpansStartedNotSampled.Inc(1)
+		if newTrace {
+			t.metrics.TracesStartedNotSampled.Inc(1)
+		} else if sp.firstInProcess {
+			t.metrics.TracesJoinedNotSampled.Inc(1)
+		}
+	}
+	return sp
+}
+
+func (t *Tracer) reportSpan(sp *Span) {
+	t.metrics.SpansFinished.Inc(1)
+	if sp.context.IsSampled() {
+		t.reporter.Report(sp)
+	}
+	if t.options.poolSpans {
+		t.spanPool.Put(sp)
+	}
+}
+
+// randomID generates a random trace/span ID, using tracer.random() generator.
+// It never returns 0.
+func (t *Tracer) randomID() uint64 {
+	val := t.randomNumber()
+	for val == 0 {
+		val = t.randomNumber()
+	}
+	return val
+}
+
+// (NB) span must hold the lock before making this call
+func (t *Tracer) setBaggage(sp *Span, key, value string) {
+	t.baggageSetter.setBaggage(sp, key, value)
+}
+
+// (NB) span must hold the lock before making this call
+func (t *Tracer) isDebugAllowed(operation string) bool {
+	return t.debugThrottler.IsAllowed(operation)
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/tracer_options.go b/vendor/github.com/uber/jaeger-client-go/tracer_options.go
new file mode 100644
index 000000000..a90265f03
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/tracer_options.go
@@ -0,0 +1,159 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"time"
+
+	"github.com/opentracing/opentracing-go"
+
+	"github.com/uber/jaeger-client-go/internal/baggage"
+	"github.com/uber/jaeger-client-go/internal/throttler"
+)
+
+// TracerOption is a function that sets some option on the tracer
+type TracerOption func(tracer *Tracer)
+
+// TracerOptions is a factory for all available TracerOption's
+var TracerOptions tracerOptions
+
+type tracerOptions struct{}
+
+// Metrics creates a TracerOption that initializes Metrics on the tracer,
+// which is used to emit statistics.
+func (tracerOptions) Metrics(m *Metrics) TracerOption {
+	return func(tracer *Tracer) {
+		tracer.metrics = *m
+	}
+}
+
+// Logger creates a TracerOption that gives the tracer a Logger.
+func (tracerOptions) Logger(logger Logger) TracerOption {
+	return func(tracer *Tracer) {
+		tracer.logger = logger
+	}
+}
+
+func (tracerOptions) CustomHeaderKeys(headerKeys *HeadersConfig) TracerOption {
+	return func(tracer *Tracer) {
+		if headerKeys == nil {
+			return
+		}
+		textPropagator := newTextMapPropagator(headerKeys.applyDefaults(), tracer.metrics)
+		tracer.addCodec(opentracing.TextMap, textPropagator, textPropagator)
+
+		httpHeaderPropagator := newHTTPHeaderPropagator(headerKeys.applyDefaults(), tracer.metrics)
+		tracer.addCodec(opentracing.HTTPHeaders, httpHeaderPropagator, httpHeaderPropagator)
+	}
+}
+
+// TimeNow creates a TracerOption that gives the tracer a function
+// used to generate timestamps for spans.
+func (tracerOptions) TimeNow(timeNow func() time.Time) TracerOption {
+	return func(tracer *Tracer) {
+		tracer.timeNow = timeNow
+	}
+}
+
+// RandomNumber creates a TracerOption that gives the tracer
+// a thread-safe random number generator function for generating trace IDs.
+func (tracerOptions) RandomNumber(randomNumber func() uint64) TracerOption {
+	return func(tracer *Tracer) {
+		tracer.randomNumber = randomNumber
+	}
+}
+
+// PoolSpans creates a TracerOption that tells the tracer whether it should use
+// an object pool to minimize span allocations.
+// This should be used with care, only if the service is not running any async tasks
+// that can access parent spans after those spans have been finished.
+func (tracerOptions) PoolSpans(poolSpans bool) TracerOption {
+	return func(tracer *Tracer) {
+		tracer.options.poolSpans = poolSpans
+	}
+}
+
+// Deprecated: HostIPv4 creates a TracerOption that identifies the current service/process.
+// If not set, the factory method will obtain the current IP address.
+// The TracerOption is deprecated; the tracer will attempt to automatically detect the IP.
+func (tracerOptions) HostIPv4(hostIPv4 uint32) TracerOption {
+	return func(tracer *Tracer) {
+		tracer.hostIPv4 = hostIPv4
+	}
+}
+
+func (tracerOptions) Injector(format interface{}, injector Injector) TracerOption {
+	return func(tracer *Tracer) {
+		tracer.injectors[format] = injector
+	}
+}
+
+func (tracerOptions) Extractor(format interface{}, extractor Extractor) TracerOption {
+	return func(tracer *Tracer) {
+		tracer.extractors[format] = extractor
+	}
+}
+
+func (t tracerOptions) Observer(observer Observer) TracerOption {
+	return t.ContribObserver(&oldObserver{obs: observer})
+}
+
+func (tracerOptions) ContribObserver(observer ContribObserver) TracerOption {
+	return func(tracer *Tracer) {
+		tracer.observer.append(observer)
+	}
+}
+
+func (tracerOptions) Gen128Bit(gen128Bit bool) TracerOption {
+	return func(tracer *Tracer) {
+		tracer.options.gen128Bit = gen128Bit
+	}
+}
+
+func (tracerOptions) HighTraceIDGenerator(highTraceIDGenerator func() uint64) TracerOption {
+	return func(tracer *Tracer) {
+		tracer.options.highTraceIDGenerator = highTraceIDGenerator
+	}
+}
+
+func (tracerOptions) MaxTagValueLength(maxTagValueLength int) TracerOption {
+	return func(tracer *Tracer) {
+		tracer.options.maxTagValueLength = maxTagValueLength
+	}
+}
+
+func (tracerOptions) ZipkinSharedRPCSpan(zipkinSharedRPCSpan bool) TracerOption {
+	return func(tracer *Tracer) {
+		tracer.options.zipkinSharedRPCSpan = zipkinSharedRPCSpan
+	}
+}
+
+func (tracerOptions) Tag(key string, value interface{}) TracerOption {
+	return func(tracer *Tracer) {
+		tracer.tags = append(tracer.tags, Tag{key: key, value: value})
+	}
+}
+
+func (tracerOptions) BaggageRestrictionManager(mgr baggage.RestrictionManager) TracerOption {
+	return func(tracer *Tracer) {
+		tracer.baggageRestrictionManager = mgr
+	}
+}
+
+func (tracerOptions) DebugThrottler(throttler throttler.Throttler) TracerOption {
+	return func(tracer *Tracer) {
+		tracer.debugThrottler = throttler
+	}
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/transport.go b/vendor/github.com/uber/jaeger-client-go/transport.go
new file mode 100644
index 000000000..c5f5b1955
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/transport.go
@@ -0,0 +1,38 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"io"
+)
+
+// Transport abstracts the method of sending spans out of process.
+// Implementations are NOT required to be thread-safe; the RemoteReporter
+// is expected to only call methods on the Transport from the same go-routine.
+type Transport interface {
+	// Append converts the span to the wire representation and adds it
+	// to sender's internal buffer.  If the buffer exceeds its designated
+	// size, the transport should call Flush() and return the number of spans
+	// flushed, otherwise return 0. If error is returned, the returned number
+	// of spans is treated as failed span, and reported to metrics accordingly.
+	Append(span *Span) (int, error)
+
+	// Flush submits the internal buffer to the remote server. It returns the
+	// number of spans flushed. If error is returned, the returned number of
+	// spans is treated as failed span, and reported to metrics accordingly.
+	Flush() (int, error)
+
+	io.Closer
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/transport_udp.go b/vendor/github.com/uber/jaeger-client-go/transport_udp.go
new file mode 100644
index 000000000..7b9ccf937
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/transport_udp.go
@@ -0,0 +1,131 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"errors"
+	"fmt"
+
+	"github.com/uber/jaeger-client-go/thrift"
+
+	j "github.com/uber/jaeger-client-go/thrift-gen/jaeger"
+	"github.com/uber/jaeger-client-go/utils"
+)
+
+// Empirically obtained constant for how many bytes in the message are used for envelope.
+// The total datagram size is:
+// sizeof(Span) * numSpans + processByteSize + emitBatchOverhead <= maxPacketSize
+// There is a unit test `TestEmitBatchOverhead` that validates this number.
+// Note that due to the use of Compact Thrift protocol, overhead grows with the number of spans
+// in the batch, because the length of the list is encoded as varint32, as well as SeqId.
+const emitBatchOverhead = 30
+
+var errSpanTooLarge = errors.New("Span is too large")
+
+type udpSender struct {
+	client          *utils.AgentClientUDP
+	maxPacketSize   int                   // max size of datagram in bytes
+	maxSpanBytes    int                   // max number of bytes to record spans (excluding envelope) in the datagram
+	byteBufferSize  int                   // current number of span bytes accumulated in the buffer
+	spanBuffer      []*j.Span             // spans buffered before a flush
+	thriftBuffer    *thrift.TMemoryBuffer // buffer used to calculate byte size of a span
+	thriftProtocol  thrift.TProtocol
+	process         *j.Process
+	processByteSize int
+}
+
+// NewUDPTransport creates a reporter that submits spans to jaeger-agent
+func NewUDPTransport(hostPort string, maxPacketSize int) (Transport, error) {
+	if len(hostPort) == 0 {
+		hostPort = fmt.Sprintf("%s:%d", DefaultUDPSpanServerHost, DefaultUDPSpanServerPort)
+	}
+	if maxPacketSize == 0 {
+		maxPacketSize = utils.UDPPacketMaxLength
+	}
+
+	protocolFactory := thrift.NewTCompactProtocolFactory()
+
+	// Each span is first written to thriftBuffer to determine its size in bytes.
+	thriftBuffer := thrift.NewTMemoryBufferLen(maxPacketSize)
+	thriftProtocol := protocolFactory.GetProtocol(thriftBuffer)
+
+	client, err := utils.NewAgentClientUDP(hostPort, maxPacketSize)
+	if err != nil {
+		return nil, err
+	}
+
+	sender := &udpSender{
+		client:         client,
+		maxSpanBytes:   maxPacketSize - emitBatchOverhead,
+		thriftBuffer:   thriftBuffer,
+		thriftProtocol: thriftProtocol}
+	return sender, nil
+}
+
+func (s *udpSender) calcSizeOfSerializedThrift(thriftStruct thrift.TStruct) int {
+	s.thriftBuffer.Reset()
+	thriftStruct.Write(s.thriftProtocol)
+	return s.thriftBuffer.Len()
+}
+
+func (s *udpSender) Append(span *Span) (int, error) {
+	if s.process == nil {
+		s.process = BuildJaegerProcessThrift(span)
+		s.processByteSize = s.calcSizeOfSerializedThrift(s.process)
+		s.byteBufferSize += s.processByteSize
+	}
+	jSpan := BuildJaegerThrift(span)
+	spanSize := s.calcSizeOfSerializedThrift(jSpan)
+	if spanSize > s.maxSpanBytes {
+		return 1, errSpanTooLarge
+	}
+
+	s.byteBufferSize += spanSize
+	if s.byteBufferSize <= s.maxSpanBytes {
+		s.spanBuffer = append(s.spanBuffer, jSpan)
+		if s.byteBufferSize < s.maxSpanBytes {
+			return 0, nil
+		}
+		return s.Flush()
+	}
+	// the latest span did not fit in the buffer
+	n, err := s.Flush()
+	s.spanBuffer = append(s.spanBuffer, jSpan)
+	s.byteBufferSize = spanSize + s.processByteSize
+	return n, err
+}
+
+func (s *udpSender) Flush() (int, error) {
+	n := len(s.spanBuffer)
+	if n == 0 {
+		return 0, nil
+	}
+	err := s.client.EmitBatch(&j.Batch{Process: s.process, Spans: s.spanBuffer})
+	s.resetBuffers()
+
+	return n, err
+}
+
+func (s *udpSender) Close() error {
+	return s.client.Close()
+}
+
+func (s *udpSender) resetBuffers() {
+	for i := range s.spanBuffer {
+		s.spanBuffer[i] = nil
+	}
+	s.spanBuffer = s.spanBuffer[:0]
+	s.byteBufferSize = s.processByteSize
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/utils/http_json.go b/vendor/github.com/uber/jaeger-client-go/utils/http_json.go
new file mode 100644
index 000000000..237211f82
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/utils/http_json.go
@@ -0,0 +1,54 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package utils
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net/http"
+)
+
+// GetJSON makes an HTTP call to the specified URL and parses the returned JSON into `out`.
+func GetJSON(url string, out interface{}) error {
+	resp, err := http.Get(url)
+	if err != nil {
+		return err
+	}
+	return ReadJSON(resp, out)
+}
+
+// ReadJSON reads JSON from http.Response and parses it into `out`
+func ReadJSON(resp *http.Response, out interface{}) error {
+	defer resp.Body.Close()
+
+	if resp.StatusCode >= 400 {
+		body, err := ioutil.ReadAll(resp.Body)
+		if err != nil {
+			return err
+		}
+
+		return fmt.Errorf("StatusCode: %d, Body: %s", resp.StatusCode, body)
+	}
+
+	if out == nil {
+		io.Copy(ioutil.Discard, resp.Body)
+		return nil
+	}
+
+	decoder := json.NewDecoder(resp.Body)
+	return decoder.Decode(out)
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/utils/localip.go b/vendor/github.com/uber/jaeger-client-go/utils/localip.go
new file mode 100644
index 000000000..b51af7713
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/utils/localip.go
@@ -0,0 +1,84 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package utils
+
+import (
+	"errors"
+	"net"
+)
+
+// This code is borrowed from https://github.com/uber/tchannel-go/blob/dev/localip.go
+
+// scoreAddr scores how likely the given addr is to be a remote address and returns the
+// IP to use when listening. Any address which receives a negative score should not be used.
+// Scores are calculated as:
+// -1 for any unknown IP addresses.
+// +300 for IPv4 addresses
+// +100 for non-local addresses, extra +100 for "up" interaces.
+func scoreAddr(iface net.Interface, addr net.Addr) (int, net.IP) {
+	var ip net.IP
+	if netAddr, ok := addr.(*net.IPNet); ok {
+		ip = netAddr.IP
+	} else if netIP, ok := addr.(*net.IPAddr); ok {
+		ip = netIP.IP
+	} else {
+		return -1, nil
+	}
+
+	var score int
+	if ip.To4() != nil {
+		score += 300
+	}
+	if iface.Flags&net.FlagLoopback == 0 && !ip.IsLoopback() {
+		score += 100
+		if iface.Flags&net.FlagUp != 0 {
+			score += 100
+		}
+	}
+	return score, ip
+}
+
+// HostIP tries to find an IP that can be used by other machines to reach this machine.
+func HostIP() (net.IP, error) {
+	interfaces, err := net.Interfaces()
+	if err != nil {
+		return nil, err
+	}
+
+	bestScore := -1
+	var bestIP net.IP
+	// Select the highest scoring IP as the best IP.
+	for _, iface := range interfaces {
+		addrs, err := iface.Addrs()
+		if err != nil {
+			// Skip this interface if there is an error.
+			continue
+		}
+
+		for _, addr := range addrs {
+			score, ip := scoreAddr(iface, addr)
+			if score > bestScore {
+				bestScore = score
+				bestIP = ip
+			}
+		}
+	}
+
+	if bestScore == -1 {
+		return nil, errors.New("no addresses to listen on")
+	}
+
+	return bestIP, nil
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/utils/rand.go b/vendor/github.com/uber/jaeger-client-go/utils/rand.go
new file mode 100644
index 000000000..9875f7f55
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/utils/rand.go
@@ -0,0 +1,46 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package utils
+
+import (
+	"math/rand"
+	"sync"
+)
+
+// lockedSource allows a random number generator to be used by multiple goroutines concurrently.
+// The code is very similar to math/rand.lockedSource, which is unfortunately not exposed.
+type lockedSource struct {
+	mut sync.Mutex
+	src rand.Source
+}
+
+// NewRand returns a rand.Rand that is threadsafe.
+func NewRand(seed int64) *rand.Rand {
+	return rand.New(&lockedSource{src: rand.NewSource(seed)})
+}
+
+func (r *lockedSource) Int63() (n int64) {
+	r.mut.Lock()
+	n = r.src.Int63()
+	r.mut.Unlock()
+	return
+}
+
+// Seed implements Seed() of Source
+func (r *lockedSource) Seed(seed int64) {
+	r.mut.Lock()
+	r.src.Seed(seed)
+	r.mut.Unlock()
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/utils/rate_limiter.go b/vendor/github.com/uber/jaeger-client-go/utils/rate_limiter.go
new file mode 100644
index 000000000..1b8db9758
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/utils/rate_limiter.go
@@ -0,0 +1,77 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package utils
+
+import (
+	"sync"
+	"time"
+)
+
+// RateLimiter is a filter used to check if a message that is worth itemCost units is within the rate limits.
+type RateLimiter interface {
+	CheckCredit(itemCost float64) bool
+}
+
+type rateLimiter struct {
+	sync.Mutex
+
+	creditsPerSecond float64
+	balance          float64
+	maxBalance       float64
+	lastTick         time.Time
+
+	timeNow func() time.Time
+}
+
+// NewRateLimiter creates a new rate limiter based on leaky bucket algorithm, formulated in terms of a
+// credits balance that is replenished every time CheckCredit() method is called (tick) by the amount proportional
+// to the time elapsed since the last tick, up to max of creditsPerSecond. A call to CheckCredit() takes a cost
+// of an item we want to pay with the balance. If the balance exceeds the cost of the item, the item is "purchased"
+// and the balance reduced, indicated by returned value of true. Otherwise the balance is unchanged and return false.
+//
+// This can be used to limit a rate of messages emitted by a service by instantiating the Rate Limiter with the
+// max number of messages a service is allowed to emit per second, and calling CheckCredit(1.0) for each message
+// to determine if the message is within the rate limit.
+//
+// It can also be used to limit the rate of traffic in bytes, by setting creditsPerSecond to desired throughput
+// as bytes/second, and calling CheckCredit() with the actual message size.
+func NewRateLimiter(creditsPerSecond, maxBalance float64) RateLimiter {
+	return &rateLimiter{
+		creditsPerSecond: creditsPerSecond,
+		balance:          maxBalance,
+		maxBalance:       maxBalance,
+		lastTick:         time.Now(),
+		timeNow:          time.Now}
+}
+
+func (b *rateLimiter) CheckCredit(itemCost float64) bool {
+	b.Lock()
+	defer b.Unlock()
+	// calculate how much time passed since the last tick, and update current tick
+	currentTime := b.timeNow()
+	elapsedTime := currentTime.Sub(b.lastTick)
+	b.lastTick = currentTime
+	// calculate how much credit have we accumulated since the last tick
+	b.balance += elapsedTime.Seconds() * b.creditsPerSecond
+	if b.balance > b.maxBalance {
+		b.balance = b.maxBalance
+	}
+	// if we have enough credits to pay for current item, then reduce balance and allow
+	if b.balance >= itemCost {
+		b.balance -= itemCost
+		return true
+	}
+	return false
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/utils/udp_client.go b/vendor/github.com/uber/jaeger-client-go/utils/udp_client.go
new file mode 100644
index 000000000..6f042073d
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/utils/udp_client.go
@@ -0,0 +1,98 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package utils
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"net"
+
+	"github.com/uber/jaeger-client-go/thrift"
+
+	"github.com/uber/jaeger-client-go/thrift-gen/agent"
+	"github.com/uber/jaeger-client-go/thrift-gen/jaeger"
+	"github.com/uber/jaeger-client-go/thrift-gen/zipkincore"
+)
+
+// UDPPacketMaxLength is the max size of UDP packet we want to send, synced with jaeger-agent
+const UDPPacketMaxLength = 65000
+
+// AgentClientUDP is a UDP client to Jaeger agent that implements agent.Agent interface.
+type AgentClientUDP struct {
+	agent.Agent
+	io.Closer
+
+	connUDP       *net.UDPConn
+	client        *agent.AgentClient
+	maxPacketSize int                   // max size of datagram in bytes
+	thriftBuffer  *thrift.TMemoryBuffer // buffer used to calculate byte size of a span
+}
+
+// NewAgentClientUDP creates a client that sends spans to Jaeger Agent over UDP.
+func NewAgentClientUDP(hostPort string, maxPacketSize int) (*AgentClientUDP, error) {
+	if maxPacketSize == 0 {
+		maxPacketSize = UDPPacketMaxLength
+	}
+
+	thriftBuffer := thrift.NewTMemoryBufferLen(maxPacketSize)
+	protocolFactory := thrift.NewTCompactProtocolFactory()
+	client := agent.NewAgentClientFactory(thriftBuffer, protocolFactory)
+
+	destAddr, err := net.ResolveUDPAddr("udp", hostPort)
+	if err != nil {
+		return nil, err
+	}
+
+	connUDP, err := net.DialUDP(destAddr.Network(), nil, destAddr)
+	if err != nil {
+		return nil, err
+	}
+	if err := connUDP.SetWriteBuffer(maxPacketSize); err != nil {
+		return nil, err
+	}
+
+	clientUDP := &AgentClientUDP{
+		connUDP:       connUDP,
+		client:        client,
+		maxPacketSize: maxPacketSize,
+		thriftBuffer:  thriftBuffer}
+	return clientUDP, nil
+}
+
+// EmitZipkinBatch implements EmitZipkinBatch() of Agent interface
+func (a *AgentClientUDP) EmitZipkinBatch(spans []*zipkincore.Span) error {
+	return errors.New("Not implemented")
+}
+
+// EmitBatch implements EmitBatch() of Agent interface
+func (a *AgentClientUDP) EmitBatch(batch *jaeger.Batch) error {
+	a.thriftBuffer.Reset()
+	a.client.SeqId = 0 // we have no need for distinct SeqIds for our one-way UDP messages
+	if err := a.client.EmitBatch(batch); err != nil {
+		return err
+	}
+	if a.thriftBuffer.Len() > a.maxPacketSize {
+		return fmt.Errorf("Data does not fit within one UDP packet; size %d, max %d, spans %d",
+			a.thriftBuffer.Len(), a.maxPacketSize, len(batch.Spans))
+	}
+	_, err := a.connUDP.Write(a.thriftBuffer.Bytes())
+	return err
+}
+
+// Close implements Close() of io.Closer and closes the underlying UDP connection.
+func (a *AgentClientUDP) Close() error {
+	return a.connUDP.Close()
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/utils/utils.go b/vendor/github.com/uber/jaeger-client-go/utils/utils.go
new file mode 100644
index 000000000..ac3c325d1
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/utils/utils.go
@@ -0,0 +1,87 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package utils
+
+import (
+	"encoding/binary"
+	"errors"
+	"net"
+	"strconv"
+	"strings"
+	"time"
+)
+
+var (
+	// ErrEmptyIP an error for empty ip strings
+	ErrEmptyIP = errors.New("empty string given for ip")
+
+	// ErrNotHostColonPort an error for invalid host port string
+	ErrNotHostColonPort = errors.New("expecting host:port")
+
+	// ErrNotFourOctets an error for the wrong number of octets after splitting a string
+	ErrNotFourOctets = errors.New("Wrong number of octets")
+)
+
+// ParseIPToUint32 converts a string ip (e.g. "x.y.z.w") to an uint32
+func ParseIPToUint32(ip string) (uint32, error) {
+	if ip == "" {
+		return 0, ErrEmptyIP
+	}
+
+	if ip == "localhost" {
+		return 127<<24 | 1, nil
+	}
+
+	octets := strings.Split(ip, ".")
+	if len(octets) != 4 {
+		return 0, ErrNotFourOctets
+	}
+
+	var intIP uint32
+	for i := 0; i < 4; i++ {
+		octet, err := strconv.Atoi(octets[i])
+		if err != nil {
+			return 0, err
+		}
+		intIP = (intIP << 8) | uint32(octet)
+	}
+
+	return intIP, nil
+}
+
+// ParsePort converts port number from string to uin16
+func ParsePort(portString string) (uint16, error) {
+	port, err := strconv.ParseUint(portString, 10, 16)
+	return uint16(port), err
+}
+
+// PackIPAsUint32 packs an IPv4 as uint32
+func PackIPAsUint32(ip net.IP) uint32 {
+	if ipv4 := ip.To4(); ipv4 != nil {
+		return binary.BigEndian.Uint32(ipv4)
+	}
+	return 0
+}
+
+// TimeToMicrosecondsSinceEpochInt64 converts Go time.Time to a long
+// representing time since epoch in microseconds, which is used expected
+// in the Jaeger spans encoded as Thrift.
+func TimeToMicrosecondsSinceEpochInt64(t time.Time) int64 {
+	// ^^^ Passing time.Time by value is faster than passing a pointer!
+	// BenchmarkTimeByValue-8	2000000000	         1.37 ns/op
+	// BenchmarkTimeByPtr-8  	2000000000	         1.98 ns/op
+
+	return t.UnixNano() / 1000
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/zipkin.go b/vendor/github.com/uber/jaeger-client-go/zipkin.go
new file mode 100644
index 000000000..636952b7f
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/zipkin.go
@@ -0,0 +1,76 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"github.com/opentracing/opentracing-go"
+)
+
+// ZipkinSpanFormat is an OpenTracing carrier format constant
+const ZipkinSpanFormat = "zipkin-span-format"
+
+// ExtractableZipkinSpan is a type of Carrier used for integration with Zipkin-aware
+// RPC frameworks (like TChannel). It does not support baggage, only trace IDs.
+type ExtractableZipkinSpan interface {
+	TraceID() uint64
+	SpanID() uint64
+	ParentID() uint64
+	Flags() byte
+}
+
+// InjectableZipkinSpan is a type of Carrier used for integration with Zipkin-aware
+// RPC frameworks (like TChannel). It does not support baggage, only trace IDs.
+type InjectableZipkinSpan interface {
+	SetTraceID(traceID uint64)
+	SetSpanID(spanID uint64)
+	SetParentID(parentID uint64)
+	SetFlags(flags byte)
+}
+
+type zipkinPropagator struct {
+	tracer *Tracer
+}
+
+func (p *zipkinPropagator) Inject(
+	ctx SpanContext,
+	abstractCarrier interface{},
+) error {
+	carrier, ok := abstractCarrier.(InjectableZipkinSpan)
+	if !ok {
+		return opentracing.ErrInvalidCarrier
+	}
+
+	carrier.SetTraceID(ctx.TraceID().Low) // TODO this cannot work with 128bit IDs
+	carrier.SetSpanID(uint64(ctx.SpanID()))
+	carrier.SetParentID(uint64(ctx.ParentID()))
+	carrier.SetFlags(ctx.flags)
+	return nil
+}
+
+func (p *zipkinPropagator) Extract(abstractCarrier interface{}) (SpanContext, error) {
+	carrier, ok := abstractCarrier.(ExtractableZipkinSpan)
+	if !ok {
+		return emptyContext, opentracing.ErrInvalidCarrier
+	}
+	if carrier.TraceID() == 0 {
+		return emptyContext, opentracing.ErrSpanContextNotFound
+	}
+	var ctx SpanContext
+	ctx.traceID.Low = carrier.TraceID()
+	ctx.spanID = SpanID(carrier.SpanID())
+	ctx.parentID = SpanID(carrier.ParentID())
+	ctx.flags = carrier.Flags()
+	return ctx, nil
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/zipkin_thrift_span.go b/vendor/github.com/uber/jaeger-client-go/zipkin_thrift_span.go
new file mode 100644
index 000000000..dce58b433
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/zipkin_thrift_span.go
@@ -0,0 +1,322 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"encoding/binary"
+	"fmt"
+	"time"
+
+	"github.com/opentracing/opentracing-go/ext"
+
+	"github.com/uber/jaeger-client-go/internal/spanlog"
+	z "github.com/uber/jaeger-client-go/thrift-gen/zipkincore"
+	"github.com/uber/jaeger-client-go/utils"
+)
+
+const (
+	// Zipkin UI does not work well with non-string tag values
+	allowPackedNumbers = false
+)
+
+var specialTagHandlers = map[string]func(*zipkinSpan, interface{}){
+	string(ext.SpanKind):     setSpanKind,
+	string(ext.PeerHostIPv4): setPeerIPv4,
+	string(ext.PeerPort):     setPeerPort,
+	string(ext.PeerService):  setPeerService,
+	TracerIPTagKey:           removeTag,
+}
+
+// BuildZipkinThrift builds thrift span based on internal span.
+func BuildZipkinThrift(s *Span) *z.Span {
+	span := &zipkinSpan{Span: s}
+	span.handleSpecialTags()
+	parentID := int64(span.context.parentID)
+	var ptrParentID *int64
+	if parentID != 0 {
+		ptrParentID = &parentID
+	}
+	timestamp := utils.TimeToMicrosecondsSinceEpochInt64(span.startTime)
+	duration := span.duration.Nanoseconds() / int64(time.Microsecond)
+	endpoint := &z.Endpoint{
+		ServiceName: span.tracer.serviceName,
+		Ipv4:        int32(span.tracer.hostIPv4)}
+	thriftSpan := &z.Span{
+		TraceID:           int64(span.context.traceID.Low), // TODO upgrade zipkin thrift and use TraceIdHigh
+		ID:                int64(span.context.spanID),
+		ParentID:          ptrParentID,
+		Name:              span.operationName,
+		Timestamp:         &timestamp,
+		Duration:          &duration,
+		Debug:             span.context.IsDebug(),
+		Annotations:       buildAnnotations(span, endpoint),
+		BinaryAnnotations: buildBinaryAnnotations(span, endpoint)}
+	return thriftSpan
+}
+
+func buildAnnotations(span *zipkinSpan, endpoint *z.Endpoint) []*z.Annotation {
+	// automatically adding 2 Zipkin CoreAnnotations
+	annotations := make([]*z.Annotation, 0, 2+len(span.logs))
+	var startLabel, endLabel string
+	if span.spanKind == string(ext.SpanKindRPCClientEnum) {
+		startLabel, endLabel = z.CLIENT_SEND, z.CLIENT_RECV
+	} else if span.spanKind == string(ext.SpanKindRPCServerEnum) {
+		startLabel, endLabel = z.SERVER_RECV, z.SERVER_SEND
+	}
+	if !span.startTime.IsZero() && startLabel != "" {
+		start := &z.Annotation{
+			Timestamp: utils.TimeToMicrosecondsSinceEpochInt64(span.startTime),
+			Value:     startLabel,
+			Host:      endpoint}
+		annotations = append(annotations, start)
+		if span.duration != 0 {
+			endTs := span.startTime.Add(span.duration)
+			end := &z.Annotation{
+				Timestamp: utils.TimeToMicrosecondsSinceEpochInt64(endTs),
+				Value:     endLabel,
+				Host:      endpoint}
+			annotations = append(annotations, end)
+		}
+	}
+	for _, log := range span.logs {
+		anno := &z.Annotation{
+			Timestamp: utils.TimeToMicrosecondsSinceEpochInt64(log.Timestamp),
+			Host:      endpoint}
+		if content, err := spanlog.MaterializeWithJSON(log.Fields); err == nil {
+			anno.Value = truncateString(string(content), span.tracer.options.maxTagValueLength)
+		} else {
+			anno.Value = err.Error()
+		}
+		annotations = append(annotations, anno)
+	}
+	return annotations
+}
+
+func buildBinaryAnnotations(span *zipkinSpan, endpoint *z.Endpoint) []*z.BinaryAnnotation {
+	// automatically adding local component or server/client address tag, and client version
+	annotations := make([]*z.BinaryAnnotation, 0, 2+len(span.tags))
+
+	if span.peerDefined() && span.isRPC() {
+		peer := z.Endpoint{
+			Ipv4:        span.peer.Ipv4,
+			Port:        span.peer.Port,
+			ServiceName: span.peer.ServiceName}
+		label := z.CLIENT_ADDR
+		if span.isRPCClient() {
+			label = z.SERVER_ADDR
+		}
+		anno := &z.BinaryAnnotation{
+			Key:            label,
+			Value:          []byte{1},
+			AnnotationType: z.AnnotationType_BOOL,
+			Host:           &peer}
+		annotations = append(annotations, anno)
+	}
+	if !span.isRPC() {
+		componentName := endpoint.ServiceName
+		for _, tag := range span.tags {
+			if tag.key == string(ext.Component) {
+				componentName = stringify(tag.value)
+				break
+			}
+		}
+		local := &z.BinaryAnnotation{
+			Key:            z.LOCAL_COMPONENT,
+			Value:          []byte(componentName),
+			AnnotationType: z.AnnotationType_STRING,
+			Host:           endpoint}
+		annotations = append(annotations, local)
+	}
+	for _, tag := range span.tags {
+		// "Special tags" are already handled by this point, we'd be double reporting the
+		// tags if we don't skip here
+		if _, ok := specialTagHandlers[tag.key]; ok {
+			continue
+		}
+		if anno := buildBinaryAnnotation(tag.key, tag.value, span.tracer.options.maxTagValueLength, nil); anno != nil {
+			annotations = append(annotations, anno)
+		}
+	}
+	return annotations
+}
+
+func buildBinaryAnnotation(key string, val interface{}, maxTagValueLength int, endpoint *z.Endpoint) *z.BinaryAnnotation {
+	bann := &z.BinaryAnnotation{Key: key, Host: endpoint}
+	if value, ok := val.(string); ok {
+		bann.Value = []byte(truncateString(value, maxTagValueLength))
+		bann.AnnotationType = z.AnnotationType_STRING
+	} else if value, ok := val.([]byte); ok {
+		if len(value) > maxTagValueLength {
+			value = value[:maxTagValueLength]
+		}
+		bann.Value = value
+		bann.AnnotationType = z.AnnotationType_BYTES
+	} else if value, ok := val.(int32); ok && allowPackedNumbers {
+		bann.Value = int32ToBytes(value)
+		bann.AnnotationType = z.AnnotationType_I32
+	} else if value, ok := val.(int64); ok && allowPackedNumbers {
+		bann.Value = int64ToBytes(value)
+		bann.AnnotationType = z.AnnotationType_I64
+	} else if value, ok := val.(int); ok && allowPackedNumbers {
+		bann.Value = int64ToBytes(int64(value))
+		bann.AnnotationType = z.AnnotationType_I64
+	} else if value, ok := val.(bool); ok {
+		bann.Value = []byte{boolToByte(value)}
+		bann.AnnotationType = z.AnnotationType_BOOL
+	} else {
+		value := stringify(val)
+		bann.Value = []byte(truncateString(value, maxTagValueLength))
+		bann.AnnotationType = z.AnnotationType_STRING
+	}
+	return bann
+}
+
+func stringify(value interface{}) string {
+	if s, ok := value.(string); ok {
+		return s
+	}
+	return fmt.Sprintf("%+v", value)
+}
+
+func truncateString(value string, maxLength int) string {
+	// we ignore the problem of utf8 runes possibly being sliced in the middle,
+	// as it is rather expensive to iterate through each tag just to find rune
+	// boundaries.
+	if len(value) > maxLength {
+		return value[:maxLength]
+	}
+	return value
+}
+
+func boolToByte(b bool) byte {
+	if b {
+		return 1
+	}
+	return 0
+}
+
+// int32ToBytes converts int32 to bytes.
+func int32ToBytes(i int32) []byte {
+	buf := make([]byte, 4)
+	binary.BigEndian.PutUint32(buf, uint32(i))
+	return buf
+}
+
+// int64ToBytes converts int64 to bytes.
+func int64ToBytes(i int64) []byte {
+	buf := make([]byte, 8)
+	binary.BigEndian.PutUint64(buf, uint64(i))
+	return buf
+}
+
+type zipkinSpan struct {
+	*Span
+
+	// peer points to the peer service participating in this span,
+	// e.g. the Client if this span is a server span,
+	// or Server if this span is a client span
+	peer struct {
+		Ipv4        int32
+		Port        int16
+		ServiceName string
+	}
+
+	// used to distinguish local vs. RPC Server vs. RPC Client spans
+	spanKind string
+}
+
+func (s *zipkinSpan) handleSpecialTags() {
+	s.Lock()
+	defer s.Unlock()
+	if s.firstInProcess {
+		// append the process tags
+		s.tags = append(s.tags, s.tracer.tags...)
+	}
+	filteredTags := make([]Tag, 0, len(s.tags))
+	for _, tag := range s.tags {
+		if handler, ok := specialTagHandlers[tag.key]; ok {
+			handler(s, tag.value)
+		} else {
+			filteredTags = append(filteredTags, tag)
+		}
+	}
+	s.tags = filteredTags
+}
+
+func setSpanKind(s *zipkinSpan, value interface{}) {
+	if val, ok := value.(string); ok {
+		s.spanKind = val
+		return
+	}
+	if val, ok := value.(ext.SpanKindEnum); ok {
+		s.spanKind = string(val)
+	}
+}
+
+func setPeerIPv4(s *zipkinSpan, value interface{}) {
+	if val, ok := value.(string); ok {
+		if ip, err := utils.ParseIPToUint32(val); err == nil {
+			s.peer.Ipv4 = int32(ip)
+			return
+		}
+	}
+	if val, ok := value.(uint32); ok {
+		s.peer.Ipv4 = int32(val)
+		return
+	}
+	if val, ok := value.(int32); ok {
+		s.peer.Ipv4 = val
+	}
+}
+
+func setPeerPort(s *zipkinSpan, value interface{}) {
+	if val, ok := value.(string); ok {
+		if port, err := utils.ParsePort(val); err == nil {
+			s.peer.Port = int16(port)
+			return
+		}
+	}
+	if val, ok := value.(uint16); ok {
+		s.peer.Port = int16(val)
+		return
+	}
+	if val, ok := value.(int); ok {
+		s.peer.Port = int16(val)
+	}
+}
+
+func setPeerService(s *zipkinSpan, value interface{}) {
+	if val, ok := value.(string); ok {
+		s.peer.ServiceName = val
+	}
+}
+
+func removeTag(s *zipkinSpan, value interface{}) {}
+
+func (s *zipkinSpan) peerDefined() bool {
+	return s.peer.ServiceName != "" || s.peer.Ipv4 != 0 || s.peer.Port != 0
+}
+
+func (s *zipkinSpan) isRPC() bool {
+	s.RLock()
+	defer s.RUnlock()
+	return s.spanKind == string(ext.SpanKindRPCClientEnum) || s.spanKind == string(ext.SpanKindRPCServerEnum)
+}
+
+func (s *zipkinSpan) isRPCClient() bool {
+	s.RLock()
+	defer s.RUnlock()
+	return s.spanKind == string(ext.SpanKindRPCClientEnum)
+}
diff --git a/vendor/github.com/uber/jaeger-lib/LICENSE b/vendor/github.com/uber/jaeger-lib/LICENSE
new file mode 100644
index 000000000..261eeb9e9
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-lib/LICENSE
@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
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+
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+      other entities that control, are controlled by, or are under common
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+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
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+      "Work" shall mean the work of authorship, whether in Source or
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+          notices within Derivative Works that You distribute, alongside
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+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
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+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
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+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
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+      Contributor provides its Contributions) on an "AS IS" BASIS,
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+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
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+   9. Accepting Warranty or Additional Liability. While redistributing
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+      on Your own behalf and on Your sole responsibility, not on behalf
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+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
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+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/vendor/github.com/uber/jaeger-lib/metrics/counter.go b/vendor/github.com/uber/jaeger-lib/metrics/counter.go
new file mode 100644
index 000000000..2a6a43efd
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-lib/metrics/counter.go
@@ -0,0 +1,28 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package metrics
+
+// Counter tracks the number of times an event has occurred
+type Counter interface {
+	// Inc adds the given value to the counter.
+	Inc(int64)
+}
+
+// NullCounter counter that does nothing
+var NullCounter Counter = nullCounter{}
+
+type nullCounter struct{}
+
+func (nullCounter) Inc(int64) {}
diff --git a/vendor/github.com/uber/jaeger-lib/metrics/factory.go b/vendor/github.com/uber/jaeger-lib/metrics/factory.go
new file mode 100644
index 000000000..a744a890d
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-lib/metrics/factory.go
@@ -0,0 +1,35 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package metrics
+
+// Factory creates new metrics
+type Factory interface {
+	Counter(name string, tags map[string]string) Counter
+	Timer(name string, tags map[string]string) Timer
+	Gauge(name string, tags map[string]string) Gauge
+
+	// Namespace returns a nested metrics factory.
+	Namespace(name string, tags map[string]string) Factory
+}
+
+// NullFactory is a metrics factory that returns NullCounter, NullTimer, and NullGauge.
+var NullFactory Factory = nullFactory{}
+
+type nullFactory struct{}
+
+func (nullFactory) Counter(name string, tags map[string]string) Counter   { return NullCounter }
+func (nullFactory) Timer(name string, tags map[string]string) Timer       { return NullTimer }
+func (nullFactory) Gauge(name string, tags map[string]string) Gauge       { return NullGauge }
+func (nullFactory) Namespace(name string, tags map[string]string) Factory { return NullFactory }
diff --git a/vendor/github.com/uber/jaeger-lib/metrics/gauge.go b/vendor/github.com/uber/jaeger-lib/metrics/gauge.go
new file mode 100644
index 000000000..3c606391a
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-lib/metrics/gauge.go
@@ -0,0 +1,28 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package metrics
+
+// Gauge returns instantaneous measurements of something as an int64 value
+type Gauge interface {
+	// Update the gauge to the value passed in.
+	Update(int64)
+}
+
+// NullGauge gauge that does nothing
+var NullGauge Gauge = nullGauge{}
+
+type nullGauge struct{}
+
+func (nullGauge) Update(int64) {}
diff --git a/vendor/github.com/uber/jaeger-lib/metrics/local.go b/vendor/github.com/uber/jaeger-lib/metrics/local.go
new file mode 100644
index 000000000..217d30600
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-lib/metrics/local.go
@@ -0,0 +1,337 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package metrics
+
+import (
+	"sort"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	"github.com/codahale/hdrhistogram"
+)
+
+// This is intentionally very similar to github.com/codahale/metrics, the
+// main difference being that counters/gauges are scoped to the provider
+// rather than being global (to facilitate testing).
+
+// A LocalBackend is a metrics provider which aggregates data in-vm, and
+// allows exporting snapshots to shove the data into a remote collector
+type LocalBackend struct {
+	cm       sync.Mutex
+	gm       sync.Mutex
+	tm       sync.Mutex
+	counters map[string]*int64
+	gauges   map[string]*int64
+	timers   map[string]*localBackendTimer
+	stop     chan struct{}
+	wg       sync.WaitGroup
+	TagsSep  string
+	TagKVSep string
+}
+
+// NewLocalBackend returns a new LocalBackend. The collectionInterval is the histogram
+// time window for each timer.
+func NewLocalBackend(collectionInterval time.Duration) *LocalBackend {
+	b := &LocalBackend{
+		counters: make(map[string]*int64),
+		gauges:   make(map[string]*int64),
+		timers:   make(map[string]*localBackendTimer),
+		stop:     make(chan struct{}),
+		TagsSep:  "|",
+		TagKVSep: "=",
+	}
+	if collectionInterval == 0 {
+		// Use one histogram time window for all timers
+		return b
+	}
+	b.wg.Add(1)
+	go b.runLoop(collectionInterval)
+	return b
+}
+
+// Clear discards accumulated stats
+func (b *LocalBackend) Clear() {
+	b.cm.Lock()
+	defer b.cm.Unlock()
+	b.gm.Lock()
+	defer b.gm.Unlock()
+	b.tm.Lock()
+	defer b.tm.Unlock()
+	b.counters = make(map[string]*int64)
+	b.gauges = make(map[string]*int64)
+	b.timers = make(map[string]*localBackendTimer)
+}
+
+func (b *LocalBackend) runLoop(collectionInterval time.Duration) {
+	defer b.wg.Done()
+	ticker := time.NewTicker(collectionInterval)
+	for {
+		select {
+		case <-ticker.C:
+			b.tm.Lock()
+			timers := make(map[string]*localBackendTimer, len(b.timers))
+			for timerName, timer := range b.timers {
+				timers[timerName] = timer
+			}
+			b.tm.Unlock()
+
+			for _, t := range timers {
+				t.Lock()
+				t.hist.Rotate()
+				t.Unlock()
+			}
+		case <-b.stop:
+			ticker.Stop()
+			return
+		}
+	}
+}
+
+// IncCounter increments a counter value
+func (b *LocalBackend) IncCounter(name string, tags map[string]string, delta int64) {
+	name = GetKey(name, tags, b.TagsSep, b.TagKVSep)
+	b.cm.Lock()
+	defer b.cm.Unlock()
+	counter := b.counters[name]
+	if counter == nil {
+		b.counters[name] = new(int64)
+		*b.counters[name] = delta
+		return
+	}
+	atomic.AddInt64(counter, delta)
+}
+
+// UpdateGauge updates the value of a gauge
+func (b *LocalBackend) UpdateGauge(name string, tags map[string]string, value int64) {
+	name = GetKey(name, tags, b.TagsSep, b.TagKVSep)
+	b.gm.Lock()
+	defer b.gm.Unlock()
+	gauge := b.gauges[name]
+	if gauge == nil {
+		b.gauges[name] = new(int64)
+		*b.gauges[name] = value
+		return
+	}
+	atomic.StoreInt64(gauge, value)
+}
+
+// RecordTimer records a timing duration
+func (b *LocalBackend) RecordTimer(name string, tags map[string]string, d time.Duration) {
+	name = GetKey(name, tags, b.TagsSep, b.TagKVSep)
+	timer := b.findOrCreateTimer(name)
+	timer.Lock()
+	timer.hist.Current.RecordValue(int64(d / time.Millisecond))
+	timer.Unlock()
+}
+
+func (b *LocalBackend) findOrCreateTimer(name string) *localBackendTimer {
+	b.tm.Lock()
+	defer b.tm.Unlock()
+	if t, ok := b.timers[name]; ok {
+		return t
+	}
+
+	t := &localBackendTimer{
+		hist: hdrhistogram.NewWindowed(5, 0, int64((5*time.Minute)/time.Millisecond), 1),
+	}
+	b.timers[name] = t
+	return t
+}
+
+type localBackendTimer struct {
+	sync.Mutex
+	hist *hdrhistogram.WindowedHistogram
+}
+
+var (
+	percentiles = map[string]float64{
+		"P50":  50,
+		"P75":  75,
+		"P90":  90,
+		"P95":  95,
+		"P99":  99,
+		"P999": 99.9,
+	}
+)
+
+// Snapshot captures a snapshot of the current counter and gauge values
+func (b *LocalBackend) Snapshot() (counters, gauges map[string]int64) {
+	b.cm.Lock()
+	defer b.cm.Unlock()
+
+	counters = make(map[string]int64, len(b.counters))
+	for name, value := range b.counters {
+		counters[name] = atomic.LoadInt64(value)
+	}
+
+	b.gm.Lock()
+	defer b.gm.Unlock()
+
+	gauges = make(map[string]int64, len(b.gauges))
+	for name, value := range b.gauges {
+		gauges[name] = atomic.LoadInt64(value)
+	}
+
+	b.tm.Lock()
+	timers := make(map[string]*localBackendTimer)
+	for timerName, timer := range b.timers {
+		timers[timerName] = timer
+	}
+	b.tm.Unlock()
+
+	for timerName, timer := range timers {
+		timer.Lock()
+		hist := timer.hist.Merge()
+		timer.Unlock()
+		for name, q := range percentiles {
+			gauges[timerName+"."+name] = hist.ValueAtQuantile(q)
+		}
+	}
+
+	return
+}
+
+// Stop cleanly closes the background goroutine spawned by NewLocalBackend.
+func (b *LocalBackend) Stop() {
+	close(b.stop)
+	b.wg.Wait()
+}
+
+// GetKey converts name+tags into a single string of the form
+// "name|tag1=value1|...|tagN=valueN", where tag names are
+// sorted alphabetically.
+func GetKey(name string, tags map[string]string, tagsSep string, tagKVSep string) string {
+	keys := make([]string, 0, len(tags))
+	for k := range tags {
+		keys = append(keys, k)
+	}
+	sort.Strings(keys)
+	key := name
+	for _, k := range keys {
+		key = key + tagsSep + k + tagKVSep + tags[k]
+	}
+	return key
+}
+
+type stats struct {
+	name         string
+	tags         map[string]string
+	localBackend *LocalBackend
+}
+
+type localTimer struct {
+	stats
+}
+
+func (l *localTimer) Record(d time.Duration) {
+	l.localBackend.RecordTimer(l.name, l.tags, d)
+}
+
+type localCounter struct {
+	stats
+}
+
+func (l *localCounter) Inc(delta int64) {
+	l.localBackend.IncCounter(l.name, l.tags, delta)
+}
+
+type localGauge struct {
+	stats
+}
+
+func (l *localGauge) Update(value int64) {
+	l.localBackend.UpdateGauge(l.name, l.tags, value)
+}
+
+// LocalFactory stats factory that creates metrics that are stored locally
+type LocalFactory struct {
+	*LocalBackend
+	namespace string
+	tags      map[string]string
+}
+
+// NewLocalFactory returns a new LocalMetricsFactory
+func NewLocalFactory(collectionInterval time.Duration) *LocalFactory {
+	return &LocalFactory{
+		LocalBackend: NewLocalBackend(collectionInterval),
+	}
+}
+
+// appendTags adds the tags to the namespace tags and returns a combined map.
+func (l *LocalFactory) appendTags(tags map[string]string) map[string]string {
+	newTags := make(map[string]string)
+	for k, v := range l.tags {
+		newTags[k] = v
+	}
+	for k, v := range tags {
+		newTags[k] = v
+	}
+	return newTags
+}
+
+func (l *LocalFactory) newNamespace(name string) string {
+	if l.namespace == "" {
+		return name
+	}
+
+	if name == "" {
+		return l.namespace
+	}
+
+	return l.namespace + "." + name
+}
+
+// Counter returns a local stats counter
+func (l *LocalFactory) Counter(name string, tags map[string]string) Counter {
+	return &localCounter{
+		stats{
+			name:         l.newNamespace(name),
+			tags:         l.appendTags(tags),
+			localBackend: l.LocalBackend,
+		},
+	}
+}
+
+// Timer returns a local stats timer.
+func (l *LocalFactory) Timer(name string, tags map[string]string) Timer {
+	return &localTimer{
+		stats{
+			name:         l.newNamespace(name),
+			tags:         l.appendTags(tags),
+			localBackend: l.LocalBackend,
+		},
+	}
+}
+
+// Gauge returns a local stats gauge.
+func (l *LocalFactory) Gauge(name string, tags map[string]string) Gauge {
+	return &localGauge{
+		stats{
+			name:         l.newNamespace(name),
+			tags:         l.appendTags(tags),
+			localBackend: l.LocalBackend,
+		},
+	}
+}
+
+// Namespace returns a new namespace.
+func (l *LocalFactory) Namespace(name string, tags map[string]string) Factory {
+	return &LocalFactory{
+		namespace:    l.newNamespace(name),
+		tags:         l.appendTags(tags),
+		LocalBackend: l.LocalBackend,
+	}
+}
diff --git a/vendor/github.com/uber/jaeger-lib/metrics/metrics.go b/vendor/github.com/uber/jaeger-lib/metrics/metrics.go
new file mode 100644
index 000000000..0b97707b0
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-lib/metrics/metrics.go
@@ -0,0 +1,85 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package metrics
+
+import (
+	"fmt"
+	"reflect"
+	"strings"
+)
+
+// Init initializes the passed in metrics and initializes its fields using the passed in factory.
+func Init(metrics interface{}, factory Factory, globalTags map[string]string) {
+	if err := initMetrics(metrics, factory, globalTags); err != nil {
+		panic(err.Error())
+	}
+}
+
+// initMetrics uses reflection to initialize a struct containing metrics fields
+// by assigning new Counter/Gauge/Timer values with the metric name retrieved
+// from the `metric` tag and stats tags retrieved from the `tags` tag.
+//
+// Note: all fields of the struct must be exported, have a `metric` tag, and be
+// of type Counter or Gauge or Timer.
+func initMetrics(m interface{}, factory Factory, globalTags map[string]string) error {
+	// Allow user to opt out of reporting metrics by passing in nil.
+	if factory == nil {
+		factory = NullFactory
+	}
+
+	counterPtrType := reflect.TypeOf((*Counter)(nil)).Elem()
+	gaugePtrType := reflect.TypeOf((*Gauge)(nil)).Elem()
+	timerPtrType := reflect.TypeOf((*Timer)(nil)).Elem()
+
+	v := reflect.ValueOf(m).Elem()
+	t := v.Type()
+	for i := 0; i < t.NumField(); i++ {
+		tags := make(map[string]string)
+		for k, v := range globalTags {
+			tags[k] = v
+		}
+		field := t.Field(i)
+		metric := field.Tag.Get("metric")
+		if metric == "" {
+			return fmt.Errorf("Field %s is missing a tag 'metric'", field.Name)
+		}
+		if tagString := field.Tag.Get("tags"); tagString != "" {
+			tagPairs := strings.Split(tagString, ",")
+			for _, tagPair := range tagPairs {
+				tag := strings.Split(tagPair, "=")
+				if len(tag) != 2 {
+					return fmt.Errorf(
+						"Field [%s]: Tag [%s] is not of the form key=value in 'tags' string [%s]",
+						field.Name, tagPair, tagString)
+				}
+				tags[tag[0]] = tag[1]
+			}
+		}
+		var obj interface{}
+		if field.Type.AssignableTo(counterPtrType) {
+			obj = factory.Counter(metric, tags)
+		} else if field.Type.AssignableTo(gaugePtrType) {
+			obj = factory.Gauge(metric, tags)
+		} else if field.Type.AssignableTo(timerPtrType) {
+			obj = factory.Timer(metric, tags)
+		} else {
+			return fmt.Errorf(
+				"Field %s is not a pointer to timer, gauge, or counter",
+				field.Name)
+		}
+		v.Field(i).Set(reflect.ValueOf(obj))
+	}
+	return nil
+}
diff --git a/vendor/github.com/uber/jaeger-lib/metrics/stopwatch.go b/vendor/github.com/uber/jaeger-lib/metrics/stopwatch.go
new file mode 100644
index 000000000..4a8abdb53
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-lib/metrics/stopwatch.go
@@ -0,0 +1,43 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package metrics
+
+import (
+	"time"
+)
+
+// StartStopwatch begins recording the executing time of an event, returning
+// a Stopwatch that should be used to stop the recording the time for
+// that event.  Multiple events can be occurring simultaneously each
+// represented by different active Stopwatches
+func StartStopwatch(timer Timer) Stopwatch {
+	return Stopwatch{t: timer, start: time.Now()}
+}
+
+// A Stopwatch tracks the execution time of a specific event
+type Stopwatch struct {
+	t     Timer
+	start time.Time
+}
+
+// Stop stops executing of the stopwatch and records the amount of elapsed time
+func (s Stopwatch) Stop() {
+	s.t.Record(s.ElapsedTime())
+}
+
+// ElapsedTime returns the amount of elapsed time (in time.Duration)
+func (s Stopwatch) ElapsedTime() time.Duration {
+	return time.Since(s.start)
+}
diff --git a/vendor/github.com/uber/jaeger-lib/metrics/timer.go b/vendor/github.com/uber/jaeger-lib/metrics/timer.go
new file mode 100644
index 000000000..e18d222ab
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-lib/metrics/timer.go
@@ -0,0 +1,33 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package metrics
+
+import (
+	"time"
+)
+
+// Timer accumulates observations about how long some operation took,
+// and also maintains a historgam of percentiles.
+type Timer interface {
+	// Records the time passed in.
+	Record(time.Duration)
+}
+
+// NullTimer timer that does nothing
+var NullTimer Timer = nullTimer{}
+
+type nullTimer struct{}
+
+func (nullTimer) Record(time.Duration) {}
diff --git a/vendor/vendor.json b/vendor/vendor.json
index 5602567ed..66a61dcec 100644
--- a/vendor/vendor.json
+++ b/vendor/vendor.json
@@ -69,6 +69,12 @@
 			"revisionTime": "2015-01-22T07:26:53Z"
 		},
 		{
+			"checksumSHA1": "7gK+lSShSu1NRw83/A95BcgMqsI=",
+			"path": "github.com/codahale/hdrhistogram",
+			"revision": "3a0bb77429bd3a61596f5e8a3172445844342120",
+			"revisionTime": "2016-10-10T02:54:55Z"
+		},
+		{
 			"checksumSHA1": "dvabztWVQX8f6oMLRyv4dLH+TGY=",
 			"path": "github.com/davecgh/go-spew/spew",
 			"revision": "346938d642f2ec3594ed81d874461961cd0faa76",
@@ -322,6 +328,24 @@
 			"revisionTime": "2017-01-28T05:05:32Z"
 		},
 		{
+			"checksumSHA1": "wIcN7tZiF441h08RHAm4NV8cYO4=",
+			"path": "github.com/opentracing/opentracing-go",
+			"revision": "bd9c3193394760d98b2fa6ebb2291f0cd1d06a7d",
+			"revisionTime": "2018-06-06T20:41:48Z"
+		},
+		{
+			"checksumSHA1": "uhDxBvLEqRAMZKgpTZ8MFuLIIM8=",
+			"path": "github.com/opentracing/opentracing-go/ext",
+			"revision": "bd9c3193394760d98b2fa6ebb2291f0cd1d06a7d",
+			"revisionTime": "2018-06-06T20:41:48Z"
+		},
+		{
+			"checksumSHA1": "tnkdNJbJxNKuPZMWapP1xhKIIGw=",
+			"path": "github.com/opentracing/opentracing-go/log",
+			"revision": "bd9c3193394760d98b2fa6ebb2291f0cd1d06a7d",
+			"revisionTime": "2018-06-06T20:41:48Z"
+		},
+		{
 			"checksumSHA1": "Se195FlZ160eaEk/uVx4KdTPSxU=",
 			"path": "github.com/pborman/uuid",
 			"revision": "1b00554d822231195d1babd97ff4a781231955c9",
@@ -496,6 +520,108 @@
 			"revisionTime": "2018-07-08T03:05:51Z"
 		},
 		{
+			"checksumSHA1": "nD6S4KB0S+YHxVMDDE+w3PyXaMk=",
+			"path": "github.com/uber/jaeger-client-go",
+			"revision": "f7e0d4744fa6d5287c53b8ac8d4f83089ce07ce8",
+			"revisionTime": "2018-06-07T15:18:42Z"
+		},
+		{
+			"checksumSHA1": "cjhPfiQbTqfkHmZM3Bi+Bm8qgN4=",
+			"path": "github.com/uber/jaeger-client-go/config",
+			"revision": "f7e0d4744fa6d5287c53b8ac8d4f83089ce07ce8",
+			"revisionTime": "2018-06-07T15:18:42Z"
+		},
+		{
+			"checksumSHA1": "KM5UXTWkHULmw0dDRNuk8ogWyGs=",
+			"path": "github.com/uber/jaeger-client-go/internal/baggage",
+			"revision": "f7e0d4744fa6d5287c53b8ac8d4f83089ce07ce8",
+			"revisionTime": "2018-06-07T15:18:42Z"
+		},
+		{
+			"checksumSHA1": "tZqlcHV1XoLdZp9jfnydzsZAvYo=",
+			"path": "github.com/uber/jaeger-client-go/internal/baggage/remote",
+			"revision": "f7e0d4744fa6d5287c53b8ac8d4f83089ce07ce8",
+			"revisionTime": "2018-06-07T15:18:42Z"
+		},
+		{
+			"checksumSHA1": "QB0L0GrzyMGQp6ivkkxp7a1DPsE=",
+			"path": "github.com/uber/jaeger-client-go/internal/spanlog",
+			"revision": "f7e0d4744fa6d5287c53b8ac8d4f83089ce07ce8",
+			"revisionTime": "2018-06-07T15:18:42Z"
+		},
+		{
+			"checksumSHA1": "79HRO/+ekkpwqDB/OMiW+AHJtlE=",
+			"path": "github.com/uber/jaeger-client-go/internal/throttler",
+			"revision": "f7e0d4744fa6d5287c53b8ac8d4f83089ce07ce8",
+			"revisionTime": "2018-06-07T15:18:42Z"
+		},
+		{
+			"checksumSHA1": "OVQDWFtFMs+NODe0F/S5kYViQco=",
+			"path": "github.com/uber/jaeger-client-go/internal/throttler/remote",
+			"revision": "f7e0d4744fa6d5287c53b8ac8d4f83089ce07ce8",
+			"revisionTime": "2018-06-07T15:18:42Z"
+		},
+		{
+			"checksumSHA1": "tMP/vxbHwNAbOEaUhic5/meKfac=",
+			"path": "github.com/uber/jaeger-client-go/log",
+			"revision": "f7e0d4744fa6d5287c53b8ac8d4f83089ce07ce8",
+			"revisionTime": "2018-06-07T15:18:42Z"
+		},
+		{
+			"checksumSHA1": "j4WrA/B2SJCqHxttCQ+TYbmtQqE=",
+			"path": "github.com/uber/jaeger-client-go/rpcmetrics",
+			"revision": "f7e0d4744fa6d5287c53b8ac8d4f83089ce07ce8",
+			"revisionTime": "2018-06-07T15:18:42Z"
+		},
+		{
+			"checksumSHA1": "+ffspyTBQLql2UiU6muvfWR/m1o=",
+			"path": "github.com/uber/jaeger-client-go/thrift",
+			"revision": "f7e0d4744fa6d5287c53b8ac8d4f83089ce07ce8",
+			"revisionTime": "2018-06-07T15:18:42Z"
+		},
+		{
+			"checksumSHA1": "fMIQ4sJFCkqFYhXvvLKIlofqxvY=",
+			"path": "github.com/uber/jaeger-client-go/thrift-gen/agent",
+			"revision": "f7e0d4744fa6d5287c53b8ac8d4f83089ce07ce8",
+			"revisionTime": "2018-06-07T15:18:42Z"
+		},
+		{
+			"checksumSHA1": "fRR2p+JAp7paApf32YuQuWU7yzY=",
+			"path": "github.com/uber/jaeger-client-go/thrift-gen/baggage",
+			"revision": "f7e0d4744fa6d5287c53b8ac8d4f83089ce07ce8",
+			"revisionTime": "2018-06-07T15:18:42Z"
+		},
+		{
+			"checksumSHA1": "JZkMEOmiOFFEuGCsDOVLK5RzvMM=",
+			"path": "github.com/uber/jaeger-client-go/thrift-gen/jaeger",
+			"revision": "f7e0d4744fa6d5287c53b8ac8d4f83089ce07ce8",
+			"revisionTime": "2018-06-07T15:18:42Z"
+		},
+		{
+			"checksumSHA1": "0teQUhTqTE1fLs+vbnTTzWOqdEQ=",
+			"path": "github.com/uber/jaeger-client-go/thrift-gen/sampling",
+			"revision": "f7e0d4744fa6d5287c53b8ac8d4f83089ce07ce8",
+			"revisionTime": "2018-06-07T15:18:42Z"
+		},
+		{
+			"checksumSHA1": "Nx5witfz05BSO2YlFzh2Gno6bA0=",
+			"path": "github.com/uber/jaeger-client-go/thrift-gen/zipkincore",
+			"revision": "f7e0d4744fa6d5287c53b8ac8d4f83089ce07ce8",
+			"revisionTime": "2018-06-07T15:18:42Z"
+		},
+		{
+			"checksumSHA1": "DKwwIk9vq53IKO7RKccat9cnqeo=",
+			"path": "github.com/uber/jaeger-client-go/utils",
+			"revision": "f7e0d4744fa6d5287c53b8ac8d4f83089ce07ce8",
+			"revisionTime": "2018-06-07T15:18:42Z"
+		},
+		{
+			"checksumSHA1": "k1iaOSBmLp3TpGvHNnRQXyJfwyI=",
+			"path": "github.com/uber/jaeger-lib/metrics",
+			"revision": "a51202d6f4a7e5a219e3841a43614ff7187ae7f1",
+			"revisionTime": "2018-06-15T20:27:29Z"
+		},
+		{
 			"checksumSHA1": "TT1rac6kpQp2vz24m5yDGUNQ/QQ=",
 			"path": "golang.org/x/crypto/cast5",
 			"revision": "6a293f2d4b14b8e6d3f0539e383f6d0d30fce3fd",