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p2pstore.go
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p2pstore.go
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package p2pstore
import (
"encoding/hex"
"sync"
"time"
"github.com/assetcloud/chain/common/log/log15"
"github.com/assetcloud/chain/system/p2p/dht/protocol"
types2 "github.com/assetcloud/chain/system/p2p/dht/types"
"github.com/assetcloud/chain/types"
kbt "github.com/libp2p/go-libp2p-kbucket"
"github.com/libp2p/go-libp2p/core/peer"
)
const (
fetchActivePeer = "/chain/fetch-active-peer/1.0.0"
fetchShardPeer = "/chain/fetch-shard-peer/1.0.0"
fetchChunk = "/chain/fetch-chunk/1.0.0"
//storeChunk = "/chain/store-chunk/1.0.0"
getHeader = "/chain/headers/1.0.0"
getChunkRecord = "/chain/chunk-record/1.0.0"
fullNode = "/chain/full-node/1.0.0"
fetchPeerAddr = "/chain/fetch-peer-addr/1.0.0"
// Deprecated: old version, use getHeader instead
getHeaderOld = "/chain/headerinfoReq/1.0.0"
// 异步接口
requestPeerAddr = "/chain/request-peer-addr/1.0.0"
responsePeerAddr = "/chain/response-peer-addr/1.0.0"
requestPeerInfoForChunk = "/chain/request-peer-info-for-chunk/1.0.0"
responsePeerInfoForChunk = "/chain/response-peer-info-for-chunk/1.0.0"
)
const maxConcurrency = 10
var log = log15.New("module", "protocol.p2pstore")
// Protocol ...
type Protocol struct {
concurrency int64
*protocol.P2PEnv //协议共享接口变量
chunkToSync chan *types.ChunkInfoMsg
chunkToDelete chan *types.ChunkInfoMsg
chunkToDownload chan *types.ChunkInfoMsg
wakeup map[string]chan struct{}
wakeupMutex sync.Mutex
chunkInfoCache map[string]*types.ChunkInfoMsg
chunkInfoCacheMutex sync.Mutex
//本节点保存的chunk的索引表,会随着网络拓扑结构的变化而变化
localChunkInfo map[string]LocalChunkInfo
localChunkInfoMutex sync.RWMutex
// 扩展路由表,每小时更新一次
extendRoutingTable *kbt.RoutingTable
peerAddrRequestTrace map[peer.ID]map[peer.ID]time.Time // peerID requested ==>
peerAddrRequestTraceMutex sync.RWMutex
chunkRequestTrace map[string]map[peer.ID]time.Time // chunkHash ==> request peers
chunkRequestTraceMutex sync.RWMutex
chunkProviderCache map[string]map[peer.ID]time.Time // chunkHash ==> provider peers
chunkProviderCacheMutex sync.RWMutex
}
func init() {
protocol.RegisterProtocolInitializer(InitProtocol)
}
// InitProtocol initials the protocol.
func InitProtocol(env *protocol.P2PEnv) {
exRT, _ := kbt.NewRoutingTable(20, kbt.ConvertPeerID(env.Host.ID()), time.Minute, env.Host.Peerstore(), time.Hour, nil)
p := &Protocol{
P2PEnv: env,
chunkToSync: make(chan *types.ChunkInfoMsg, 1024),
chunkToDelete: make(chan *types.ChunkInfoMsg, 1024),
chunkToDownload: make(chan *types.ChunkInfoMsg, 1024),
wakeup: make(map[string]chan struct{}),
chunkInfoCache: make(map[string]*types.ChunkInfoMsg),
peerAddrRequestTrace: make(map[peer.ID]map[peer.ID]time.Time),
chunkRequestTrace: make(map[string]map[peer.ID]time.Time),
chunkProviderCache: make(map[string]map[peer.ID]time.Time),
extendRoutingTable: exRT,
}
//
if env.SubConfig.Percentage < types2.MinPercentage || env.SubConfig.Percentage > types2.MaxPercentage {
env.SubConfig.Percentage = types2.DefaultPercentage
}
p.initLocalChunkInfoMap()
//注册p2p通信协议,用于处理节点之间请求
protocol.RegisterStreamHandler(p.Host, requestPeerInfoForChunk, p.handleStreamRequestPeerInfoForChunk)
protocol.RegisterStreamHandler(p.Host, responsePeerInfoForChunk, p.handleStreamResponsePeerInfoForChunk)
protocol.RegisterStreamHandler(p.Host, requestPeerAddr, p.handleStreamRequestPeerAddr)
protocol.RegisterStreamHandler(p.Host, responsePeerAddr, p.handleStreamResponsePeerAddr)
protocol.RegisterStreamHandler(p.Host, fetchPeerAddr, protocol.HandlerWithRW(p.handleStreamPeerAddr))
protocol.RegisterStreamHandler(p.Host, fetchActivePeer, protocol.HandlerWithWrite(p.handleStreamFetchActivePeer))
protocol.RegisterStreamHandler(p.Host, fetchShardPeer, protocol.HandlerWithRW(p.handleStreamFetchShardPeers))
protocol.RegisterStreamHandler(p.Host, getHeaderOld, p.handleStreamGetHeaderOld)
protocol.RegisterStreamHandler(p.Host, getHeader, protocol.HandlerWithAuthAndSign(p.Host, p.handleStreamGetHeader))
if !p.SubConfig.DisableShard {
protocol.RegisterStreamHandler(p.Host, fullNode, protocol.HandlerWithWrite(p.handleStreamIsFullNode))
protocol.RegisterStreamHandler(p.Host, fetchChunk, p.handleStreamFetchChunk) //数据较大,采用特殊写入方式
protocol.RegisterStreamHandler(p.Host, getChunkRecord, protocol.HandlerWithAuthAndSign(p.Host, p.handleStreamGetChunkRecord))
}
//同时注册eventHandler,用于处理blockchain模块发来的请求
protocol.RegisterEventHandler(types.EventNotifyStoreChunk, p.handleEventNotifyStoreChunk)
protocol.RegisterEventHandler(types.EventGetChunkBlock, p.handleEventGetChunkBlock)
protocol.RegisterEventHandler(types.EventGetChunkBlockBody, p.handleEventGetChunkBlockBody)
protocol.RegisterEventHandler(types.EventGetChunkRecord, p.handleEventGetChunkRecord)
protocol.RegisterEventHandler(types.EventFetchBlockHeaders, p.handleEventGetHeaders)
go p.processLocalChunk()
go p.updateRoutine()
go p.refreshRoutine()
go p.debugLog()
go p.processLocalChunkOldVersion()
}
func (p *Protocol) refreshRoutine() {
ticker := time.NewTicker(types2.RefreshInterval)
defer ticker.Stop()
ticker2 := time.NewTicker(time.Minute * 3)
defer ticker2.Stop()
for {
select {
case <-p.Ctx.Done():
return
case <-ticker.C:
p.refreshLocalChunk()
p.cleanCache()
case <-ticker2.C:
p.cleanTrace()
}
}
}
func (p *Protocol) updateRoutine() {
ticker1 := time.NewTicker(time.Minute)
defer ticker1.Stop()
ticker2 := time.NewTicker(time.Minute * 30)
defer ticker2.Stop()
p.updateExtendRoutingTable()
for {
select {
case <-p.Ctx.Done():
return
case <-ticker1.C:
p.advertiseFullNode()
case <-ticker2.C:
p.updateExtendRoutingTable()
}
}
}
// TODO: to delete next version
func (p *Protocol) processLocalChunkOldVersion() {
for {
select {
case <-p.Ctx.Done():
return
case info := <-p.chunkToSync:
if err := p.storeChunk(info); err == nil {
break
}
bodys, _, err := p.mustFetchChunk(info)
if err != nil {
log.Error("processLocalChunk", "mustFetchChunk error", err)
break
}
if err := p.addChunkBlock(info, bodys); err != nil {
log.Error("processLocalChunk", "addChunkBlock error", err)
break
}
log.Info("processLocalChunk save chunk success")
}
}
}
func (p *Protocol) processLocalChunk() {
for {
select {
case <-p.Ctx.Done():
return
// TODO: open in next version
//case info := <-p.chunkToSync:
// for _, pid := range p.RoutingTable.NearestPeers(genDHTID(info.ChunkHash), AlphaValue) {
// if err := p.requestPeerInfoForChunk(info, pid); err != nil {
// log.Error("processLocalChunk", "requestPeerInfoForChunk error", err, "pid", pid, "chunkHash", hex.EncodeToString(info.ChunkHash))
// }
// }
case info := <-p.chunkToDelete:
if localInfo, ok := p.getChunkInfoByHash(info.ChunkHash); ok && time.Since(localInfo.Time) > types2.RefreshInterval*3 {
if err := p.deleteChunkBlock(localInfo.ChunkInfoMsg); err != nil {
log.Error("processLocalChunk", "deleteChunkBlock error", err, "chunkHash", hex.EncodeToString(localInfo.ChunkHash), "start", localInfo.Start)
break
}
}
case info := <-p.chunkToDownload:
//TODO: 1.根据节点时延排序 2.并发获取数据 3.把一个chunk分成多份分别到多个节点上去获取数据
for _, pid := range p.getChunkProviderCache(info.ChunkHash) {
bodys, _, err := p.fetchChunkFromPeer(info, pid)
if err != nil {
log.Error("processLocalChunk", "fetchChunkFromPeer error", err, "pid", pid, "chunkHash", hex.EncodeToString(info.ChunkHash))
continue
}
if bodys == nil {
continue
}
if err := p.addChunkBlock(info, bodys); err != nil {
log.Error("processLocalChunk", "addChunkBlock error", err)
continue
}
break
}
p.chunkInfoCacheMutex.Lock()
delete(p.chunkInfoCache, hex.EncodeToString(info.ChunkHash))
p.chunkInfoCacheMutex.Unlock()
}
}
}