Golang Topic.Unlock方法代码示例

func (self *NsqdCoordinator) putMessageOnSlave(coord *TopicCoordinator, logData CommitLogData, msg *nsqd.Message) *CoordErr {
	var logMgr *TopicCommitLogMgr
	var topic *nsqd.Topic
	var queueEnd nsqd.BackendQueueEnd

	checkDupOnSlave := func(tc *coordData) bool {
		if coordLog.Level() >= levellogger.LOG_DETAIL {
			topicName := tc.topicInfo.Name
			coordLog.Debugf("pub on slave : %v, msg %v", topicName, msg.ID)
		}
		logMgr = tc.logMgr
		if logMgr.IsCommitted(logData.LogID) {
			coordLog.Infof("pub the already committed log id : %v", logData.LogID)
			return true
		}
		return false
	}

	doLocalWriteOnSlave := func(tc *coordData) *CoordErr {
		var localErr error
		topicName := tc.topicInfo.Name
		partition := tc.topicInfo.Partition
		topic, localErr = self.localNsqd.GetExistingTopic(topicName, partition)
		if localErr != nil {
			coordLog.Infof("pub on slave missing topic : %v", topicName)
			// leave the isr and try re-sync with leader
			return &CoordErr{localErr.Error(), RpcErrTopicNotExist, CoordSlaveErr}
		}

		if topic.GetTopicPart() != partition {
			coordLog.Errorf("topic on slave has different partition : %v vs %v", topic.GetTopicPart(), partition)
			return &CoordErr{ErrLocalTopicPartitionMismatch.String(), RpcErrTopicNotExist, CoordSlaveErr}
		}

		topic.Lock()
		queueEnd, localErr = topic.PutMessageOnReplica(msg, nsqd.BackendOffset(logData.MsgOffset))
		topic.Unlock()
		if localErr != nil {
			coordLog.Errorf("put message on slave failed: %v", localErr)
			return &CoordErr{localErr.Error(), RpcCommonErr, CoordSlaveErr}
		}
		return nil
	}

	doLocalCommit := func() error {
		localErr := logMgr.AppendCommitLog(&logData, true)
		if localErr != nil {
			coordLog.Errorf("write commit log on slave failed: %v", localErr)
			return localErr
		}
		topic.Lock()
		topic.UpdateCommittedOffset(queueEnd)
		topic.Unlock()
		return nil
	}
	doLocalExit := func(err *CoordErr) {
		if err != nil {
			coordLog.Infof("slave put message %v error: %v", logData, err)
		}
	}

	return self.doWriteOpOnSlave(coord, checkDupOnSlave, doLocalWriteOnSlave, doLocalCommit, doLocalExit)
}

func (self *NsqdCoordinator) putMessagesOnSlave(coord *TopicCoordinator, logData CommitLogData, msgs []*nsqd.Message) *CoordErr {
	if len(msgs) == 0 {
		return ErrPubArgError
	}
	if logData.LogID != int64(msgs[0].ID) {
		return ErrPubArgError
	}
	var logMgr *TopicCommitLogMgr
	// this last log id should be used on slave to avoid the slave switch
	// override the leader's prev mpub message id.
	// While slave is chosen as leader, the next id should be larger than the last logid.
	// Because the mpub maybe already committed after the leader is down, the new leader should begin
	// with the last message id + 1 for next message.
	lastMsgLogID := int64(msgs[len(msgs)-1].ID)
	if logData.LastMsgLogID != lastMsgLogID {
		return ErrPubArgError
	}

	var queueEnd nsqd.BackendQueueEnd
	var topic *nsqd.Topic
	checkDupOnSlave := func(tc *coordData) bool {
		if coordLog.Level() >= levellogger.LOG_DETAIL {
			topicName := tc.topicInfo.Name
			coordLog.Debugf("pub on slave : %v, msg count: %v", topicName, len(msgs))
		}
		logMgr = tc.logMgr
		if logMgr.IsCommitted(logData.LogID) {
			coordLog.Infof("put the already committed log id : %v", logData.LogID)
			return true
		}
		return false
	}

	doLocalWriteOnSlave := func(tc *coordData) *CoordErr {
		var localErr error
		var start time.Time
		checkCost := coordLog.Level() >= levellogger.LOG_DEBUG
		if self.enableBenchCost {
			checkCost = true
		}
		if checkCost {
			start = time.Now()
		}
		topicName := tc.topicInfo.Name
		partition := tc.topicInfo.Partition
		topic, localErr = self.localNsqd.GetExistingTopic(topicName, partition)
		if localErr != nil {
			coordLog.Infof("pub on slave missing topic : %v", topicName)
			// leave the isr and try re-sync with leader
			return &CoordErr{localErr.Error(), RpcErrTopicNotExist, CoordSlaveErr}
		}

		topic.Lock()
		var cost time.Duration
		if checkCost {
			cost = time.Now().Sub(start)
			if cost > time.Millisecond {
				coordLog.Infof("prepare write on slave local cost :%v", cost)
			}
		}

		queueEnd, localErr = topic.PutMessagesOnReplica(msgs, nsqd.BackendOffset(logData.MsgOffset))
		if checkCost {
			cost2 := time.Now().Sub(start)
			if cost2 > time.Millisecond {
				coordLog.Infof("write local on slave cost :%v, %v", cost, cost2)
			}
		}

		topic.Unlock()
		if localErr != nil {
			logIndex, lastLogOffset, lastLog, _ := logMgr.GetLastCommitLogOffsetV2()
			coordLog.Errorf("put messages on slave failed: %v, slave last logid: %v, data: %v:%v, %v",
				localErr, logMgr.GetLastCommitLogID(), logIndex, lastLogOffset, lastLog)
			return &CoordErr{localErr.Error(), RpcCommonErr, CoordSlaveErr}
		}
		return nil
	}

	doLocalCommit := func() error {
		localErr := logMgr.AppendCommitLog(&logData, true)
		if localErr != nil {
			coordLog.Errorf("write commit log on slave failed: %v", localErr)
			return localErr
		}
		topic.Lock()
		topic.UpdateCommittedOffset(queueEnd)
		topic.Unlock()
		return nil
	}

	doLocalExit := func(err *CoordErr) {
		if err != nil {
			coordLog.Warningf("failed to batch put messages on slave: %v", err)
		}
	}
	return self.doWriteOpOnSlave(coord, checkDupOnSlave, doLocalWriteOnSlave, doLocalCommit,
		doLocalExit)
}

func (self *NsqdCoordinator) PutMessageToCluster(topic *nsqd.Topic,
	body []byte, traceID uint64) (nsqd.MessageID, nsqd.BackendOffset, int32, nsqd.BackendQueueEnd, error) {
	var commitLog CommitLogData
	var queueEnd nsqd.BackendQueueEnd
	msg := nsqd.NewMessage(0, body)
	msg.TraceID = traceID

	topicName := topic.GetTopicName()
	partition := topic.GetTopicPart()
	coord, checkErr := self.getTopicCoord(topicName, partition)
	if checkErr != nil {
		return msg.ID, nsqd.BackendOffset(commitLog.MsgOffset), commitLog.MsgSize, queueEnd, checkErr.ToErrorType()
	}

	var logMgr *TopicCommitLogMgr

	doLocalWrite := func(d *coordData) *CoordErr {
		logMgr = d.logMgr
		topic.Lock()
		id, offset, writeBytes, qe, localErr := topic.PutMessageNoLock(msg)
		queueEnd = qe
		topic.Unlock()
		if localErr != nil {
			coordLog.Warningf("put message to local failed: %v", localErr)
			return &CoordErr{localErr.Error(), RpcNoErr, CoordLocalErr}
		}
		commitLog.LogID = int64(id)
		// epoch should not be changed.
		// leader epoch change means leadership change, leadership change
		// need disable write which should hold the write lock.
		// However, we are holding write lock while doing the cluster write replication.
		commitLog.Epoch = d.GetTopicEpochForWrite()
		commitLog.LastMsgLogID = commitLog.LogID
		commitLog.MsgOffset = int64(offset)
		commitLog.MsgSize = writeBytes
		commitLog.MsgCnt = queueEnd.TotalMsgCnt()
		commitLog.MsgNum = 1

		return nil
	}
	doLocalExit := func(err *CoordErr) {
		if err != nil {
			coordLog.Infof("topic %v PutMessageToCluster msg %v error: %v", topic.GetFullName(), msg, err)
			if coord.IsWriteDisabled() {
				topic.DisableForSlave()
			}
		}
	}
	doLocalCommit := func() error {
		localErr := logMgr.AppendCommitLog(&commitLog, false)
		if localErr != nil {
			coordLog.Errorf("topic : %v, Generator %v failed write commit log : %v, logmgr: %v, %v",
				topic.GetFullName(), topic.GetMsgGenerator(), localErr, logMgr.pLogID, logMgr.nLogID)
		}
		topic.Lock()
		topic.UpdateCommittedOffset(queueEnd)
		topic.Unlock()
		return localErr
	}
	doLocalRollback := func() {
		coordLog.Warningf("failed write begin rollback : %v, %v", topic.GetFullName(), commitLog)
		topic.Lock()
		topic.RollbackNoLock(nsqd.BackendOffset(commitLog.MsgOffset), 1)
		topic.Unlock()
	}
	doRefresh := func(d *coordData) *CoordErr {
		logMgr = d.logMgr
		if d.GetTopicEpochForWrite() != commitLog.Epoch {
			coordLog.Warningf("write epoch changed during write: %v, %v", d.GetTopicEpochForWrite(), commitLog)
			return ErrEpochMismatch
		}
		self.requestNotifyNewTopicInfo(d.topicInfo.Name, d.topicInfo.Partition)
		return nil
	}
	doSlaveSync := func(c *NsqdRpcClient, nodeID string, tcData *coordData) *CoordErr {
		// should retry if failed, and the slave should keep the last success write to avoid the duplicated
		putErr := c.PutMessage(&tcData.topicLeaderSession, &tcData.topicInfo, commitLog, msg)
		if putErr != nil {
			coordLog.Infof("sync write to replica %v failed: %v. put offset:%v, logmgr: %v, %v",
				nodeID, putErr, commitLog, logMgr.pLogID, logMgr.nLogID)
		}
		return putErr
	}
	handleSyncResult := func(successNum int, tcData *coordData) bool {
		if successNum == len(tcData.topicInfo.ISR) {
			return true
		}
		return false
	}

	clusterErr := self.doSyncOpToCluster(true, coord, doLocalWrite, doLocalExit, doLocalCommit, doLocalRollback,
		doRefresh, doSlaveSync, handleSyncResult)

	var err error
	if clusterErr != nil {
		err = clusterErr.ToErrorType()
	}
	return msg.ID, nsqd.BackendOffset(commitLog.MsgOffset), commitLog.MsgSize, queueEnd, err
}