forked from ngaut/unistore
/
server.go
192 lines (170 loc) · 4.87 KB
/
server.go
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// Copyright 2019-present PingCAP, 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,
// See the License for the specific language governing permissions and
// limitations under the License.
package raftstore
import (
"context"
"encoding/binary"
"path/filepath"
"sync"
"time"
"github.com/ngaut/unistore/config"
"github.com/ngaut/unistore/pd"
"github.com/pingcap/kvproto/pkg/metapb"
"github.com/pingcap/kvproto/pkg/tikvpb"
"github.com/pingcap/log"
"go.uber.org/zap"
)
type RaftInnerServer struct {
engines *Engines
raftConfig *Config
globalConfig *config.Config
storeMeta metapb.Store
eventObserver PeerEventObserver
node *Node
snapManager *SnapManager
router *router
batchSystem *raftBatchSystem
pdWorker *worker
snapWorker *worker
lsDumper *lockStoreDumper
raftCli *RaftClient
}
func (ris *RaftInnerServer) Raft(stream tikvpb.Tikv_RaftServer) error {
for {
msg, err := stream.Recv()
if err != nil {
return err
}
_ = ris.router.sendRaftMessage(msg)
}
}
func (ris *RaftInnerServer) BatchRaft(stream tikvpb.Tikv_BatchRaftServer) error {
for {
msgs, err := stream.Recv()
if err != nil {
return err
}
for _, msg := range msgs.GetMsgs() {
_ = ris.router.sendRaftMessage(msg)
}
}
}
func (ris *RaftInnerServer) Snapshot(stream tikvpb.Tikv_SnapshotServer) error {
var err error
done := make(chan struct{})
ris.snapWorker.sender <- task{
tp: taskTypeSnapRecv,
data: recvSnapTask{
stream: stream,
callback: func(e error) {
err = e
close(done)
},
},
}
<-done
return err
}
func NewRaftInnerServer(globalConfig *config.Config, engines *Engines, raftConfig *Config) *RaftInnerServer {
return &RaftInnerServer{
engines: engines,
raftConfig: raftConfig,
globalConfig: globalConfig,
}
}
func (ris *RaftInnerServer) Setup(pdClient pd.Client) {
var wg sync.WaitGroup
ris.pdWorker = newWorker("pd-worker", &wg)
ris.snapWorker = newWorker("snap-worker", &wg)
// TODO: create local reader
// TODO: create storage read pool
// TODO: create cop read pool
// TODO: create cop endpoint
cfg := ris.raftConfig
router, batchSystem := createRaftBatchSystem(ris.globalConfig, cfg)
ris.router = router // TODO: init with local reader
ris.snapManager = NewSnapManager(cfg.SnapPath, router)
ris.batchSystem = batchSystem
ris.lsDumper = &lockStoreDumper{
stopCh: make(chan struct{}),
engines: ris.engines,
fileNumDiff: 2,
}
}
func (ris *RaftInnerServer) GetRaftstoreRouter() *RaftstoreRouter {
return &RaftstoreRouter{router: ris.router}
}
func (ris *RaftInnerServer) GetStoreMeta() *metapb.Store {
return &ris.storeMeta
}
func (ris *RaftInnerServer) SetPeerEventObserver(ob PeerEventObserver) {
ris.eventObserver = ob
}
func (ris *RaftInnerServer) Start(pdClient pd.Client) error {
ris.node = NewNode(ris.batchSystem, &ris.storeMeta, ris.raftConfig, pdClient, ris.eventObserver)
raftClient := newRaftClient(ris.raftConfig, pdClient)
trans := NewServerTransport(raftClient, ris.snapWorker.sender, ris.router)
err := ris.node.Start(context.TODO(), ris.engines, trans, ris.snapManager, ris.pdWorker, ris.router)
if err != nil {
return err
}
ris.raftCli = raftClient
snapRunner := newSnapRunner(ris.snapManager, ris.raftConfig, ris.router, pdClient)
ris.snapWorker.start(snapRunner)
go ris.lsDumper.run()
return nil
}
func (ris *RaftInnerServer) Stop() error {
ris.snapWorker.stop()
ris.node.stop()
ris.raftCli.Stop()
if err := ris.engines.raft.Close(); err != nil {
return err
}
if err := ris.engines.kv.DB.Close(); err != nil {
return err
}
return nil
}
const LockstoreFileName = "lockstore.dump"
type lockStoreDumper struct {
stopCh chan struct{}
engines *Engines
fileNumDiff uint64
}
func (dumper *lockStoreDumper) run() {
ticker := time.NewTicker(time.Second * 10)
lastFileNum := dumper.engines.raft.GetVLogOffset() >> 32
for {
select {
case <-ticker.C:
vlogOffset := dumper.engines.raft.GetVLogOffset()
currentFileNum := vlogOffset >> 32
if currentFileNum-lastFileNum >= dumper.fileNumDiff {
meta := make([]byte, 8)
binary.LittleEndian.PutUint64(meta, vlogOffset)
// Waiting for the raft log to be applied.
// TODO: it is possible that some log is not applied after sleep, find a better way to make sure this.
time.Sleep(5 * time.Second)
err := dumper.engines.kv.LockStore.DumpToFile(filepath.Join(dumper.engines.kvPath, LockstoreFileName), meta)
if err != nil {
log.Error("dump lock store failed", zap.Error(err))
continue
}
lastFileNum = currentFileNum
}
case <-dumper.stopCh:
return
}
}
}