1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
|
package client
import (
"fmt"
"io"
"net"
"time"
)
const (
// UDPPayloadSize is a reasonable default payload size for UDP packets that
// could be travelling over the internet.
UDPPayloadSize = 512
)
// UDPConfig is the config data needed to create a UDP Client.
type UDPConfig struct {
// Addr should be of the form "host:port"
// or "[ipv6-host%zone]:port".
Addr string
// PayloadSize is the maximum size of a UDP client message, optional
// Tune this based on your network. Defaults to UDPPayloadSize.
PayloadSize int
}
// NewUDPClient returns a client interface for writing to an InfluxDB UDP
// service from the given config.
func NewUDPClient(conf UDPConfig) (Client, error) {
var udpAddr *net.UDPAddr
udpAddr, err := net.ResolveUDPAddr("udp", conf.Addr)
if err != nil {
return nil, err
}
conn, err := net.DialUDP("udp", nil, udpAddr)
if err != nil {
return nil, err
}
payloadSize := conf.PayloadSize
if payloadSize == 0 {
payloadSize = UDPPayloadSize
}
return &udpclient{
conn: conn,
payloadSize: payloadSize,
}, nil
}
// Close releases the udpclient's resources.
func (uc *udpclient) Close() error {
return uc.conn.Close()
}
type udpclient struct {
conn io.WriteCloser
payloadSize int
}
func (uc *udpclient) Write(bp BatchPoints) error {
var b = make([]byte, 0, uc.payloadSize) // initial buffer size, it will grow as needed
var d, _ = time.ParseDuration("1" + bp.Precision())
var delayedError error
var checkBuffer = func(n int) {
if len(b) > 0 && len(b)+n > uc.payloadSize {
if _, err := uc.conn.Write(b); err != nil {
delayedError = err
}
b = b[:0]
}
}
for _, p := range bp.Points() {
p.pt.Round(d)
pointSize := p.pt.StringSize() + 1 // include newline in size
//point := p.pt.RoundedString(d) + "\n"
checkBuffer(pointSize)
if p.Time().IsZero() || pointSize <= uc.payloadSize {
b = p.pt.AppendString(b)
b = append(b, '\n')
continue
}
points := p.pt.Split(uc.payloadSize - 1) // account for newline character
for _, sp := range points {
checkBuffer(sp.StringSize() + 1)
b = sp.AppendString(b)
b = append(b, '\n')
}
}
if len(b) > 0 {
if _, err := uc.conn.Write(b); err != nil {
return err
}
}
return delayedError
}
func (uc *udpclient) Query(q Query) (*Response, error) {
return nil, fmt.Errorf("Querying via UDP is not supported")
}
func (uc *udpclient) Ping(timeout time.Duration) (time.Duration, string, error) {
return 0, "", nil
}
|