1 files changed, 0 insertions, 241 deletions
diff --git a/swarm/storage/dpa.go b/swarm/storage/dpa.go
deleted file mode 100644
index 44a2669f1..000000000
--- a/swarm/storage/dpa.go
+++ /dev/null
@@ -1,241 +0,0 @@
-// Copyright 2016 The go-ethereum Authors
-// This file is part of the go-ethereum library.
-//
-// The go-ethereum library is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Lesser General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// The go-ethereum library is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU Lesser General Public License for more details.
-//
-// You should have received a copy of the GNU Lesser General Public License
-// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
-
-package storage
-
-import (
-	"errors"
-	"fmt"
-	"io"
-	"sync"
-	"time"
-
-	"github.com/ethereum/go-ethereum/log"
-)
-
-/*
-DPA provides the client API entrypoints Store and Retrieve to store and retrieve
-It can store anything that has a byte slice representation, so files or serialised objects etc.
-
-Storage: DPA calls the Chunker to segment the input datastream of any size to a merkle hashed tree of chunks. The key of the root block is returned to the client.
-
-Retrieval: given the key of the root block, the DPA retrieves the block chunks and reconstructs the original data and passes it back as a lazy reader. A lazy reader is a reader with on-demand delayed processing, i.e. the chunks needed to reconstruct a large file are only fetched and processed if that particular part of the document is actually read.
-
-As the chunker produces chunks, DPA dispatches them to its own chunk store
-implementation for storage or retrieval.
-*/
-
-const (
-	storeChanCapacity           = 100
-	retrieveChanCapacity        = 100
-	singletonSwarmDbCapacity    = 50000
-	singletonSwarmCacheCapacity = 500
-	maxStoreProcesses           = 8
-	maxRetrieveProcesses        = 8
-)
-
-var (
-	notFound = errors.New("not found")
-)
-
-type DPA struct {
-	ChunkStore
-	storeC    chan *Chunk
-	retrieveC chan *Chunk
-	Chunker   Chunker
-
-	lock    sync.Mutex
-	running bool
-	quitC   chan bool
-}
-
-// for testing locally
-func NewLocalDPA(datadir string) (*DPA, error) {
-
-	hash := MakeHashFunc("SHA256")
-
-	dbStore, err := NewDbStore(datadir, hash, singletonSwarmDbCapacity, 0)
-	if err != nil {
-		return nil, err
-	}
-
-	return NewDPA(&LocalStore{
-		NewMemStore(dbStore, singletonSwarmCacheCapacity),
-		dbStore,
-	}, NewChunkerParams()), nil
-}
-
-func NewDPA(store ChunkStore, params *ChunkerParams) *DPA {
-	chunker := NewTreeChunker(params)
-	return &DPA{
-		Chunker:    chunker,
-		ChunkStore: store,
-	}
-}
-
-// Public API. Main entry point for document retrieval directly. Used by the
-// FS-aware API and httpaccess
-// Chunk retrieval blocks on netStore requests with a timeout so reader will
-// report error if retrieval of chunks within requested range time out.
-func (self *DPA) Retrieve(key Key) LazySectionReader {
-	return self.Chunker.Join(key, self.retrieveC)
-}
-
-// Public API. Main entry point for document storage directly. Used by the
-// FS-aware API and httpaccess
-func (self *DPA) Store(data io.Reader, size int64, swg *sync.WaitGroup, wwg *sync.WaitGroup) (key Key, err error) {
-	return self.Chunker.Split(data, size, self.storeC, swg, wwg)
-}
-
-func (self *DPA) Start() {
-	self.lock.Lock()
-	defer self.lock.Unlock()
-	if self.running {
-		return
-	}
-	self.running = true
-	self.retrieveC = make(chan *Chunk, retrieveChanCapacity)
-	self.storeC = make(chan *Chunk, storeChanCapacity)
-	self.quitC = make(chan bool)
-	self.storeLoop()
-	self.retrieveLoop()
-}
-
-func (self *DPA) Stop() {
-	self.lock.Lock()
-	defer self.lock.Unlock()
-	if !self.running {
-		return
-	}
-	self.running = false
-	close(self.quitC)
-}
-
-// retrieveLoop dispatches the parallel chunk retrieval requests received on the
-// retrieve channel to its ChunkStore  (NetStore or LocalStore)
-func (self *DPA) retrieveLoop() {
-	for i := 0; i < maxRetrieveProcesses; i++ {
-		go self.retrieveWorker()
-	}
-	log.Trace(fmt.Sprintf("dpa: retrieve loop spawning %v workers", maxRetrieveProcesses))
-}
-
-func (self *DPA) retrieveWorker() {
-	for chunk := range self.retrieveC {
-		log.Trace(fmt.Sprintf("dpa: retrieve loop : chunk %v", chunk.Key.Log()))
-		storedChunk, err := self.Get(chunk.Key)
-		if err == notFound {
-			log.Trace(fmt.Sprintf("chunk %v not found", chunk.Key.Log()))
-		} else if err != nil {
-			log.Trace(fmt.Sprintf("error retrieving chunk %v: %v", chunk.Key.Log(), err))
-		} else {
-			chunk.SData = storedChunk.SData
-			chunk.Size = storedChunk.Size
-		}
-		close(chunk.C)
-
-		select {
-		case <-self.quitC:
-			return
-		default:
-		}
-	}
-}
-
-// storeLoop dispatches the parallel chunk store request processors
-// received on the store channel to its ChunkStore (NetStore or LocalStore)
-func (self *DPA) storeLoop() {
-	for i := 0; i < maxStoreProcesses; i++ {
-		go self.storeWorker()
-	}
-	log.Trace(fmt.Sprintf("dpa: store spawning %v workers", maxStoreProcesses))
-}
-
-func (self *DPA) storeWorker() {
-
-	for chunk := range self.storeC {
-		self.Put(chunk)
-		if chunk.wg != nil {
-			log.Trace(fmt.Sprintf("dpa: store processor %v", chunk.Key.Log()))
-			chunk.wg.Done()
-
-		}
-		select {
-		case <-self.quitC:
-			return
-		default:
-		}
-	}
-}
-
-// DpaChunkStore implements the ChunkStore interface,
-// this chunk access layer assumed 2 chunk stores
-// local storage eg. LocalStore and network storage eg., NetStore
-// access by calling network is blocking with a timeout
-
-type dpaChunkStore struct {
-	n          int
-	localStore ChunkStore
-	netStore   ChunkStore
-}
-
-func NewDpaChunkStore(localStore, netStore ChunkStore) *dpaChunkStore {
-	return &dpaChunkStore{0, localStore, netStore}
-}
-
-// Get is the entrypoint for local retrieve requests
-// waits for response or times out
-func (self *dpaChunkStore) Get(key Key) (chunk *Chunk, err error) {
-	chunk, err = self.netStore.Get(key)
-	// timeout := time.Now().Add(searchTimeout)
-	if chunk.SData != nil {
-		log.Trace(fmt.Sprintf("DPA.Get: %v found locally, %d bytes", key.Log(), len(chunk.SData)))
-		return
-	}
-	// TODO: use self.timer time.Timer and reset with defer disableTimer
-	timer := time.After(searchTimeout)
-	select {
-	case <-timer:
-		log.Trace(fmt.Sprintf("DPA.Get: %v request time out ", key.Log()))
-		err = notFound
-	case <-chunk.Req.C:
-		log.Trace(fmt.Sprintf("DPA.Get: %v retrieved, %d bytes (%p)", key.Log(), len(chunk.SData), chunk))
-	}
-	return
-}
-
-// Put is the entrypoint for local store requests coming from storeLoop
-func (self *dpaChunkStore) Put(entry *Chunk) {
-	chunk, err := self.localStore.Get(entry.Key)
-	if err != nil {
-		log.Trace(fmt.Sprintf("DPA.Put: %v new chunk. call netStore.Put", entry.Key.Log()))
-		chunk = entry
-	} else if chunk.SData == nil {
-		log.Trace(fmt.Sprintf("DPA.Put: %v request entry found", entry.Key.Log()))
-		chunk.SData = entry.SData
-		chunk.Size = entry.Size
-	} else {
-		log.Trace(fmt.Sprintf("DPA.Put: %v chunk already known", entry.Key.Log()))
-		return
-	}
-	// from this point on the storage logic is the same with network storage requests
-	log.Trace(fmt.Sprintf("DPA.Put %v: %v", self.n, chunk.Key.Log()))
-	self.n++
-	self.netStore.Put(chunk)
-}
-
-// Close chunk store
-func (self *dpaChunkStore) Close() {}