Golang PkgSlaveOf.LastSeq Examples

Example #1

File: replication.go Project: tradia/gotable

func (slv *slave) SendSlaveOfToMaster() error {
	slv.mtx.Lock()
	var mi = slv.mi
	var cli = slv.cli
	slv.mtx.Unlock()

	if cli == nil {
		return nil
	}

	var err error
	var pkg []byte
	if mi.Migration {
		var p ctrl.PkgMigrate
		p.ClientReq = false
		p.MasterAddr = mi.MasterAddr
		p.SlaveAddr = mi.SlaveAddr
		p.SlotId = mi.SlotId

		pkg, err = ctrl.Encode(proto.CmdMigrate, 0, 0, &p)
		if err != nil {
			return err
		}
	} else {
		lastSeq, valid := slv.bin.GetMasterSeq()
		if !valid {
			slv.mc.SetStatus(ctrl.SlaveNeedClear)
			// Any better solution?
			log.Fatalf("Slave lastSeq %d is out of sync, please clear old data! "+
				"(Restart may fix this issue)", lastSeq)
		}

		var p ctrl.PkgSlaveOf
		p.ClientReq = false
		p.MasterAddr = mi.MasterAddr
		p.SlaveAddr = mi.SlaveAddr
		p.LastSeq = lastSeq
		log.Printf("Connect to master %s with lastSeq %d\n",
			mi.MasterAddr, p.LastSeq)

		pkg, err = ctrl.Encode(proto.CmdSlaveOf, 0, 0, &p)
		if err != nil {
			return err
		}
	}

	cli.AddResp(pkg)
	return slv.mc.SetStatus(ctrl.SlaveFullSync)
}