添加了注释的源码

/WangTingYeYe/rocketmq_source

前提介绍：

一定要先看前面的几篇文章，了解rocketmq的基本概念和架构设计之后再看本篇

Producer 分类

Producer有两种。 一个是普通发送者DefaultMQProducer。这个只需要构建一个Netty客户端。

还一个是事务消息发送者： TransactionMQProducer。这个需要构建一个Netty客户端同时也要构建Netty服务端（用于接受broker的回查）。

DefaultMQProducer 启动

官方提供的Producer例子

/** Licensed to the Apache Software Foundation (ASF) under one or more* contributor license agreements. See the NOTICE file distributed with* this work for additional information regarding copyright ownership.* The ASF licenses this file to You 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**/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,* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.* See the License for the specific language governing permissions and* limitations under the License.*/package org.apache.rocketmq.example.quickstart;import org.apache.rocketmq.client.exception.MQClientException;import org.apache.rocketmq.client.producer.DefaultMQProducer;import org.apache.rocketmq.client.producer.SendResult;import org.mon.message.Message;import org.apache.mon.RemotingHelper;/*** This class demonstrates how to send messages to brokers using provided {@link DefaultMQProducer}.*/public class Producer {public static void main(String[] args) throws MQClientException, InterruptedException {/** Instantiate with a producer group name.*/DefaultMQProducer producer = new DefaultMQProducer("please_rename_unique_group_name");/** Specify name server addresses.* <p/>** Alternatively, you may specify name server addresses via exporting environmental variable: NAMESRV_ADDR* <pre>* {@code* producer.setNamesrvAddr("name-server1-ip:9876;name-server2-ip:9876");* }* </pre>*/producer.setNamesrvAddr("127.0.0.1:9876");/** Launch the instance.*/producer.start();for (int i = 0; i < 2; i++) {try {/** Create a message instance, specifying topic, tag and message body.*/Message msg = new Message("TopicTest" /* Topic */,"TagA" /* Tag */,("Hello RocketMQ " + i).getBytes(RemotingHelper.DEFAULT_CHARSET) /* Message body */);//messageDelayLevel=1s 5s 10s 30s 1m 2m 3m 4m 5m 6m 7m 8m 9m 10m 20m 30m 1h 2hmsg.setDelayTimeLevel(2);/** Call send message to deliver message to one of brokers.*/SendResult sendResult = producer.send(msg);System.out.printf("%s%n", sendResult);} catch (Exception e) {e.printStackTrace();Thread.sleep(1000);}}/** Shut down once the producer instance is not longer in use.*/producer.shutdown();}}

producer.start()

producer.start() org.apache.rocketmq.client.producer.DefaultMQProducer#start org.apache.rocketmq.client.impl.producer.DefaultMQProducerImpl#start(boolean) org.apache.rocketmq.client.impl.factory.MQClientInstance#start

public void start() throws MQClientException {synchronized (this) {switch (this.serviceState) {case CREATE_JUST:this.serviceState = ServiceState.START_FAILED;// If not specified,looking address from name serverif (null == this.clientConfig.getNamesrvAddr()) {this.mQClientAPIImpl.fetchNameServerAddr();}// Start request-response channel// 启动了nettry客户端this.mQClientAPIImpl.start();// Start various schedule tasksthis.startScheduledTask();// Start pull service 消费者才会用到this.pullMessageService.start();// Start rebalance service//K2 客户端负载均衡 消费者才会用到this.rebalanceService.start();// Start push service 消费者才会用到this.defaultMQProducer.getDefaultMQProducerImpl().start(false);log.info("the client factory [{}] start OK", this.clientId);this.serviceState = ServiceState.RUNNING;break;case START_FAILED:throw new MQClientException("The Factory object[" + this.getClientId() + "] has been created before, and failed.", null);default:break;}}}

启动的定时任务this.startScheduledTask()

通过这些定时任务完成了很多核心的功能

private void startScheduledTask() {if (null == this.clientConfig.getNamesrvAddr()) {this.scheduledExecutorService.scheduleAtFixedRate(new Runnable() {@Overridepublic void run() {try {// 更新nameServer地址。MQClientInstance.this.mQClientAPIImpl.fetchNameServerAddr();} catch (Exception e) {log.error("ScheduledTask fetchNameServerAddr exception", e);}}}, 1000 * 10, 1000 * 60 * 2, TimeUnit.MILLISECONDS);}this.scheduledExecutorService.scheduleAtFixedRate(new Runnable() {@Overridepublic void run() {try {//从nameServer更新主题路由信息MQClientInstance.this.updateTopicRouteInfoFromNameServer();} catch (Exception e) {log.error("ScheduledTask updateTopicRouteInfoFromNameServer exception", e);}}}, 10, this.clientConfig.getPollNameServerInterval(), TimeUnit.MILLISECONDS);this.scheduledExecutorService.scheduleAtFixedRate(new Runnable() {@Overridepublic void run() {try {//清除下线的brokerMQClientInstance.this.cleanOfflineBroker();//向所有broker发送心跳，并记录broker的版本MQClientInstance.this.sendHeartbeatToAllBrokerWithLock();} catch (Exception e) {log.error("ScheduledTask sendHeartbeatToAllBroker exception", e);}}}, 1000, this.clientConfig.getHeartbeatBrokerInterval(), TimeUnit.MILLISECONDS);this.scheduledExecutorService.scheduleAtFixedRate(new Runnable() {@Overridepublic void run() {try {//将消费进度向Broker同步MQClientInstance.this.persistAllConsumerOffset();} catch (Exception e) {log.error("ScheduledTask persistAllConsumerOffset exception", e);}}}, 1000 * 10, this.clientConfig.getPersistConsumerOffsetInterval(), TimeUnit.MILLISECONDS);this.scheduledExecutorService.scheduleAtFixedRate(new Runnable() {@Overridepublic void run() {try {MQClientInstance.this.adjustThreadPool();} catch (Exception e) {log.error("ScheduledTask adjustThreadPool exception", e);}}}, 1, 1, TimeUnit.MINUTES);}

producer.send(msg)

SendResult sendResult = producer.send(msg); org.apache.rocketmq.client.impl.producer.DefaultMQProducerImpl#send org.apache.rocketmq.client.impl.producer.DefaultMQProducerImpl#sendDefaultImpl org.apache.rocketmq.client.impl.producer.DefaultMQProducerImpl#tryToFindTopicPublishInfo(查找topic信息)org.apache.rocketmq.client.impl.producer.DefaultMQProducerImpl#selectOneMessageQueue(选择topic下的一个队列)org.apache.rocketmq.client.impl.producer.DefaultMQProducerImpl#sendKernelImpl(真正去发送消息)

发送的核心

1、找到topic

2、找到对应的队列

3、通过nettry发送消息

//K1 Producer发送消息的实现类private SendResult sendDefaultImpl(Message msg,final CommunicationMode communicationMode,final SendCallback sendCallback,final long timeout) throws MQClientException, RemotingException, MQBrokerException, InterruptedException {this.makeSureStateOK();Validators.checkMessage(msg, this.defaultMQProducer);final long invokeID = random.nextLong();long beginTimestampFirst = System.currentTimeMillis();long beginTimestampPrev = beginTimestampFirst;long endTimestamp = beginTimestampFirst;//生产者获取Topic的公开信息，注意下有哪些信息。重点关注怎么选择MessageQueue的。TopicPublishInfo topicPublishInfo = this.tryToFindTopicPublishInfo(msg.getTopic());if (topicPublishInfo != null && topicPublishInfo.ok()) {boolean callTimeout = false;MessageQueue mq = null;Exception exception = null;SendResult sendResult = null;int timesTotal = communicationMode == CommunicationMode.SYNC ? 1 + this.defaultMQProducer.getRetryTimesWhenSendFailed() : 1;int times = 0;String[] brokersSent = new String[timesTotal];for (; times < timesTotal; times++) {String lastBrokerName = null == mq ? null : mq.getBrokerName();//K2 Producer计算把消息发到哪个MessageQueue中。MessageQueue mqSelected = this.selectOneMessageQueue(topicPublishInfo, lastBrokerName);if (mqSelected != null) {mq = mqSelected;//根据MessageQueue去获取目标节点的信息。brokersSent[times] = mq.getBrokerName();try {beginTimestampPrev = System.currentTimeMillis();if (times > 0) {//Reset topic with namespace during resend.msg.setTopic(this.defaultMQProducer.withNamespace(msg.getTopic()));}long costTime = beginTimestampPrev - beginTimestampFirst;if (timeout < costTime) {callTimeout = true;break;}//实际发送消息的方法sendResult = this.sendKernelImpl(msg, mq, communicationMode, sendCallback, topicPublishInfo, timeout - costTime);endTimestamp = System.currentTimeMillis();this.updateFaultItem(mq.getBrokerName(), endTimestamp - beginTimestampPrev, false);switch (communicationMode) {case ASYNC:return null;case ONEWAY:return null;case SYNC:if (sendResult.getSendStatus() != SendStatus.SEND_OK) {if (this.defaultMQProducer.isRetryAnotherBrokerWhenNotStoreOK()) {continue;}}return sendResult;default:break;}} catch (RemotingException e) {endTimestamp = System.currentTimeMillis();this.updateFaultItem(mq.getBrokerName(), endTimestamp - beginTimestampPrev, true);log.warn(String.format("sendKernelImpl exception, resend at once, InvokeID: %s, RT: %sms, Broker: %s", invokeID, endTimestamp - beginTimestampPrev, mq), e);log.warn(msg.toString());exception = e;continue;} catch (MQClientException e) {endTimestamp = System.currentTimeMillis();this.updateFaultItem(mq.getBrokerName(), endTimestamp - beginTimestampPrev, true);log.warn(String.format("sendKernelImpl exception, resend at once, InvokeID: %s, RT: %sms, Broker: %s", invokeID, endTimestamp - beginTimestampPrev, mq), e);log.warn(msg.toString());exception = e;continue;} catch (MQBrokerException e) {endTimestamp = System.currentTimeMillis();this.updateFaultItem(mq.getBrokerName(), endTimestamp - beginTimestampPrev, true);log.warn(String.format("sendKernelImpl exception, resend at once, InvokeID: %s, RT: %sms, Broker: %s", invokeID, endTimestamp - beginTimestampPrev, mq), e);log.warn(msg.toString());exception = e;switch (e.getResponseCode()) {case ResponseCode.TOPIC_NOT_EXIST:case ResponseCode.SERVICE_NOT_AVAILABLE:case ResponseCode.SYSTEM_ERROR:case ResponseCode.NO_PERMISSION:case ResponseCode.NO_BUYER_ID:case ResponseCode.NOT_IN_CURRENT_UNIT:continue;default:if (sendResult != null) {return sendResult;}throw e;}} catch (InterruptedException e) {endTimestamp = System.currentTimeMillis();this.updateFaultItem(mq.getBrokerName(), endTimestamp - beginTimestampPrev, false);log.warn(String.format("sendKernelImpl exception, throw exception, InvokeID: %s, RT: %sms, Broker: %s", invokeID, endTimestamp - beginTimestampPrev, mq), e);log.warn(msg.toString());log.warn("sendKernelImpl exception", e);log.warn(msg.toString());throw e;}} else {break;}}if (sendResult != null) {return sendResult;}String info = String.format("Send [%d] times, still failed, cost [%d]ms, Topic: %s, BrokersSent: %s",times,System.currentTimeMillis() - beginTimestampFirst,msg.getTopic(),Arrays.toString(brokersSent));info += FAQUrl.suggestTodo(FAQUrl.SEND_MSG_FAILED);MQClientException mqClientException = new MQClientException(info, exception);if (callTimeout) {throw new RemotingTooMuchRequestException("sendDefaultImpl call timeout");}if (exception instanceof MQBrokerException) {mqClientException.setResponseCode(((MQBrokerException) exception).getResponseCode());} else if (exception instanceof RemotingConnectException) {mqClientException.setResponseCode(ClientErrorCode.CONNECT_BROKER_EXCEPTION);} else if (exception instanceof RemotingTimeoutException) {mqClientException.setResponseCode(ClientErrorCode.ACCESS_BROKER_TIMEOUT);} else if (exception instanceof MQClientException) {mqClientException.setResponseCode(ClientErrorCode.BROKER_NOT_EXIST_EXCEPTION);}throw mqClientException;}validateNameServerSetting();throw new MQClientException("No route info of this topic: " + msg.getTopic() + FAQUrl.suggestTodo(FAQUrl.NO_TOPIC_ROUTE_INFO),null).setResponseCode(ClientErrorCode.NOT_FOUND_TOPIC_EXCEPTION);}

找到 topic信息

核心就是 本地有缓存，先从缓存拿如果拿不到去nameServer上去拿。

private TopicPublishInfo tryToFindTopicPublishInfo(final String topic) {TopicPublishInfo topicPublishInfo = this.topicPublishInfoTable.get(topic);if (null == topicPublishInfo || !topicPublishInfo.ok()) {this.topicPublishInfoTable.putIfAbsent(topic, new TopicPublishInfo());//Producer向NameServer获取更新Topic的路由信息。this.mQClientFactory.updateTopicRouteInfoFromNameServer(topic);//还是从本地缓存中寻找Topic路由信息。topicPublishInfo = this.topicPublishInfoTable.get(topic);}if (topicPublishInfo.isHaveTopicRouterInfo() || topicPublishInfo.ok()) {return topicPublishInfo;} else {this.mQClientFactory.updateTopicRouteInfoFromNameServer(topic, true, this.defaultMQProducer);topicPublishInfo = this.topicPublishInfoTable.get(topic);return topicPublishInfo;}}

选择一个队列

默认就是递增取模轮询的去选择

#org.apache.rocketmq.client.impl.producer.TopicPublishInfo#selectOneMessageQueue(java.lang.String)public MessageQueue selectOneMessageQueue(final String lastBrokerName) {if (lastBrokerName == null) {return selectOneMessageQueue();} else {int index = this.sendWhichQueue.getAndIncrement();for (int i = 0; i < this.messageQueueList.size(); i++) {int pos = Math.abs(index++) % this.messageQueueList.size();if (pos < 0)pos = 0;MessageQueue mq = this.messageQueueList.get(pos);if (!mq.getBrokerName().equals(lastBrokerName)) {return mq;}}return selectOneMessageQueue();}}//选择MessageQueue的方式： 递增取模public MessageQueue selectOneMessageQueue() {int index = this.sendWhichQueue.getAndIncrement();int pos = Math.abs(index) % this.messageQueueList.size();if (pos < 0)pos = 0;return this.messageQueueList.get(pos);}

发送消息

1、根据 queue 找到一个broker地址，因为queue上是保存了自己存在那个broker的

2、this.mQClientFactory.getMQClientAPIImpl().sendMessage() 网络请求发送消息数据

private SendResult sendKernelImpl(final Message msg,final MessageQueue mq,final CommunicationMode communicationMode,final SendCallback sendCallback,final TopicPublishInfo topicPublishInfo,final long timeout) throws MQClientException, RemotingException, MQBrokerException, InterruptedException {long beginStartTime = System.currentTimeMillis();//寻找Broker地址。找不到就去NameServer上获取。String brokerAddr = this.mQClientFactory.findBrokerAddressInPublish(mq.getBrokerName());if (null == brokerAddr) {tryToFindTopicPublishInfo(mq.getTopic());brokerAddr = this.mQClientFactory.findBrokerAddressInPublish(mq.getBrokerName());}//后面一大堆的构建请求参数代码，就不用太关注了。SendMessageContext context = null;if (brokerAddr != null) {brokerAddr = MixAll.brokerVIPChannel(this.defaultMQProducer.isSendMessageWithVIPChannel(), brokerAddr);byte[] prevBody = msg.getBody();try {//for MessageBatch,ID has been set in the generating processif (!(msg instanceof MessageBatch)) {MessageClientIDSetter.setUniqID(msg);}boolean topicWithNamespace = false;if (null != this.mQClientFactory.getClientConfig().getNamespace()) {msg.setInstanceId(this.mQClientFactory.getClientConfig().getNamespace());topicWithNamespace = true;}int sysFlag = 0;boolean msgBodyCompressed = false;if (this.tryToCompressMessage(msg)) {sysFlag |= PRESSED_FLAG;msgBodyCompressed = true;}final String tranMsg = msg.getProperty(MessageConst.PROPERTY_TRANSACTION_PREPARED);if (tranMsg != null && Boolean.parseBoolean(tranMsg)) {sysFlag |= MessageSysFlag.TRANSACTION_PREPARED_TYPE;}if (hasCheckForbiddenHook()) {CheckForbiddenContext checkForbiddenContext = new CheckForbiddenContext();checkForbiddenContext.setNameSrvAddr(this.defaultMQProducer.getNamesrvAddr());checkForbiddenContext.setGroup(this.defaultMQProducer.getProducerGroup());checkForbiddenContext.setCommunicationMode(communicationMode);checkForbiddenContext.setBrokerAddr(brokerAddr);checkForbiddenContext.setMessage(msg);checkForbiddenContext.setMq(mq);checkForbiddenContext.setUnitMode(this.isUnitMode());this.executeCheckForbiddenHook(checkForbiddenContext);}if (this.hasSendMessageHook()) {context = new SendMessageContext();context.setProducer(this);context.setProducerGroup(this.defaultMQProducer.getProducerGroup());context.setCommunicationMode(communicationMode);context.setBornHost(this.defaultMQProducer.getClientIP());context.setBrokerAddr(brokerAddr);context.setMessage(msg);context.setMq(mq);context.setNamespace(this.defaultMQProducer.getNamespace());String isTrans = msg.getProperty(MessageConst.PROPERTY_TRANSACTION_PREPARED);if (isTrans != null && isTrans.equals("true")) {context.setMsgType(MessageType.Trans_Msg_Half);}if (msg.getProperty("__STARTDELIVERTIME") != null || msg.getProperty(MessageConst.PROPERTY_DELAY_TIME_LEVEL) != null) {context.setMsgType(MessageType.Delay_Msg);}this.executeSendMessageHookBefore(context);}SendMessageRequestHeader requestHeader = new SendMessageRequestHeader();requestHeader.setProducerGroup(this.defaultMQProducer.getProducerGroup());requestHeader.setTopic(msg.getTopic());requestHeader.setDefaultTopic(this.defaultMQProducer.getCreateTopicKey());requestHeader.setDefaultTopicQueueNums(this.defaultMQProducer.getDefaultTopicQueueNums());requestHeader.setQueueId(mq.getQueueId());requestHeader.setSysFlag(sysFlag);requestHeader.setBornTimestamp(System.currentTimeMillis());requestHeader.setFlag(msg.getFlag());requestHeader.setProperties(MessageDecoder.messageProperties2String(msg.getProperties()));requestHeader.setReconsumeTimes(0);requestHeader.setUnitMode(this.isUnitMode());requestHeader.setBatch(msg instanceof MessageBatch);if (requestHeader.getTopic().startsWith(MixAll.RETRY_GROUP_TOPIC_PREFIX)) {String reconsumeTimes = MessageAccessor.getReconsumeTime(msg);if (reconsumeTimes != null) {requestHeader.setReconsumeTimes(Integer.valueOf(reconsumeTimes));MessageAccessor.clearProperty(msg, MessageConst.PROPERTY_RECONSUME_TIME);}String maxReconsumeTimes = MessageAccessor.getMaxReconsumeTimes(msg);if (maxReconsumeTimes != null) {requestHeader.setMaxReconsumeTimes(Integer.valueOf(maxReconsumeTimes));MessageAccessor.clearProperty(msg, MessageConst.PROPERTY_MAX_RECONSUME_TIMES);}}SendResult sendResult = null;switch (communicationMode) {case ASYNC:Message tmpMessage = msg;boolean messageCloned = false;if (msgBodyCompressed) {//If msg body was compressed, msgbody should be reset using prevBody.//Clone new message using commpressed message body and recover origin massage.//Fix bug:/apache/rocketmq-externals/issues/66tmpMessage = MessageAccessor.cloneMessage(msg);messageCloned = true;msg.setBody(prevBody);}if (topicWithNamespace) {if (!messageCloned) {tmpMessage = MessageAccessor.cloneMessage(msg);messageCloned = true;}msg.setTopic(NamespaceUtil.withoutNamespace(msg.getTopic(), this.defaultMQProducer.getNamespace()));}long costTimeAsync = System.currentTimeMillis() - beginStartTime;if (timeout < costTimeAsync) {throw new RemotingTooMuchRequestException("sendKernelImpl call timeout");}sendResult = this.mQClientFactory.getMQClientAPIImpl().sendMessage(brokerAddr,mq.getBrokerName(),tmpMessage,requestHeader,timeout - costTimeAsync,communicationMode,sendCallback,topicPublishInfo,this.mQClientFactory,this.defaultMQProducer.getRetryTimesWhenSendAsyncFailed(),context,this);break;case ONEWAY:case SYNC:long costTimeSync = System.currentTimeMillis() - beginStartTime;if (timeout < costTimeSync) {throw new RemotingTooMuchRequestException("sendKernelImpl call timeout");}sendResult = this.mQClientFactory.getMQClientAPIImpl().sendMessage(brokerAddr,mq.getBrokerName(),msg,requestHeader,timeout - costTimeSync,communicationMode,context,this);break;default:assert false;break;}//消息发送完成后执行钩子程序。if (this.hasSendMessageHook()) {context.setSendResult(sendResult);this.executeSendMessageHookAfter(context);}return sendResult;} catch (RemotingException e) {if (this.hasSendMessageHook()) {context.setException(e);this.executeSendMessageHookAfter(context);}throw e;} catch (MQBrokerException e) {if (this.hasSendMessageHook()) {context.setException(e);this.executeSendMessageHookAfter(context);}throw e;} catch (InterruptedException e) {if (this.hasSendMessageHook()) {context.setException(e);this.executeSendMessageHookAfter(context);}throw e;} finally {msg.setBody(prevBody);msg.setTopic(NamespaceUtil.withoutNamespace(msg.getTopic(), this.defaultMQProducer.getNamespace()));}}throw new MQClientException("The broker[" + mq.getBrokerName() + "] not exist", null);}

怎么拉去topic信息

回到上面启动的时候，启动了好几个定时任务

this.scheduledExecutorService.scheduleAtFixedRate(new Runnable() {@Overridepublic void run() {try {//从nameServer更新主题路由信息MQClientInstance.this.updateTopicRouteInfoFromNameServer();} catch (Exception e) {log.error("ScheduledTask updateTopicRouteInfoFromNameServer exception", e);}}}, 10, this.clientConfig.getPollNameServerInterval(), TimeUnit.MILLISECONDS);

定时从nameServer更新主题信息并缓存在本地

1、向nameServer 发送网络请求获取 producer关心的topic信息

2、缓存 topic信息 缓存broker网络地址

org.apache.rocketmq.client.impl.factory.MQClientInstance#updateTopicRouteInfoFromNameServer() org.apache.rocketmq.client.impl.factory.MQClientInstance#updateTopicRouteInfoFromNameServer(java.lang.String) org.apache.rocketmq.client.impl.factory.MQClientInstance#updateTopicRouteInfoFromNameServer(java.lang.String, boolean, org.apache.rocketmq.client.producer.DefaultMQProducer)

public boolean updateTopicRouteInfoFromNameServer(final String topic, boolean isDefault,DefaultMQProducer defaultMQProducer) {try {if (this.lockNamesrv.tryLock(LOCK_TIMEOUT_MILLIS, TimeUnit.MILLISECONDS)) {try {TopicRouteData topicRouteData;if (isDefault && defaultMQProducer != null) {// 发起网络请求从NameServer 获取指定Topic的信息topicRouteData = this.mQClientAPIImpl.getDefaultTopicRouteInfoFromNameServer(defaultMQProducer.getCreateTopicKey(),1000 * 3);if (topicRouteData != null) {for (QueueData data : topicRouteData.getQueueDatas()) {int queueNums = Math.min(defaultMQProducer.getDefaultTopicQueueNums(), data.getReadQueueNums());data.setReadQueueNums(queueNums);data.setWriteQueueNums(queueNums);}}} else {topicRouteData = this.mQClientAPIImpl.getTopicRouteInfoFromNameServer(topic, 1000 * 3);}if (topicRouteData != null) {// 更新本地topic缓存TopicRouteData old = this.topicRouteTable.get(topic);boolean changed = topicRouteDataIsChange(old, topicRouteData);if (!changed) {changed = this.isNeedUpdateTopicRouteInfo(topic);} else {log.info("the topic[{}] route info changed, old[{}] ,new[{}]", topic, old, topicRouteData);}if (changed) {TopicRouteData cloneTopicRouteData = topicRouteData.cloneTopicRouteData();// 更新本地broker缓存for (BrokerData bd : topicRouteData.getBrokerDatas()) {this.brokerAddrTable.put(bd.getBrokerName(), bd.getBrokerAddrs());}// Update Pub info{TopicPublishInfo publishInfo = topicRouteData2TopicPublishInfo(topic, topicRouteData);publishInfo.setHaveTopicRouterInfo(true);Iterator<Entry<String, MQProducerInner>> it = this.producerTable.entrySet().iterator();while (it.hasNext()) {Entry<String, MQProducerInner> entry = it.next();MQProducerInner impl = entry.getValue();if (impl != null) {impl.updateTopicPublishInfo(topic, publishInfo);}}}// Update sub info{Set<MessageQueue> subscribeInfo = topicRouteData2TopicSubscribeInfo(topic, topicRouteData);Iterator<Entry<String, MQConsumerInner>> it = this.consumerTable.entrySet().iterator();while (it.hasNext()) {Entry<String, MQConsumerInner> entry = it.next();MQConsumerInner impl = entry.getValue();if (impl != null) {impl.updateTopicSubscribeInfo(topic, subscribeInfo);}}}log.info("topicRouteTable.put. Topic = {}, TopicRouteData[{}]", topic, cloneTopicRouteData);this.topicRouteTable.put(topic, cloneTopicRouteData);return true;}} else {log.warn("updateTopicRouteInfoFromNameServer, getTopicRouteInfoFromNameServer return null, Topic: {}", topic);}} catch (MQClientException e) {if (!topic.startsWith(MixAll.RETRY_GROUP_TOPIC_PREFIX)) {log.warn("updateTopicRouteInfoFromNameServer Exception", e);}} catch (RemotingException e) {log.error("updateTopicRouteInfoFromNameServer Exception", e);throw new IllegalStateException(e);} finally {this.lockNamesrv.unlock();}} else {log.warn("updateTopicRouteInfoFromNameServer tryLock timeout {}ms", LOCK_TIMEOUT_MILLIS);}} catch (InterruptedException e) {log.warn("updateTopicRouteInfoFromNameServer Exception", e);}return false;}

至此基本就可以串起来了