RongtongJin commented on code in PR #4834: URL: https://github.com/apache/rocketmq/pull/4834#discussion_r952049926
########## broker/src/main/java/org/apache/rocketmq/broker/topic/TopicRouteInfoManager.java: ########## @@ -0,0 +1,283 @@ +/* + * 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 + * + * 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, + * 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.broker.topic; + +import com.google.common.collect.Sets; +import java.util.HashSet; +import java.util.Map; +import org.apache.rocketmq.broker.BrokerController; +import org.apache.rocketmq.client.exception.MQBrokerException; +import org.apache.rocketmq.client.impl.factory.MQClientInstance; +import org.apache.rocketmq.client.impl.producer.TopicPublishInfo; +import org.apache.rocketmq.common.MixAll; +import org.apache.rocketmq.common.constant.LoggerName; +import org.apache.rocketmq.common.message.MessageQueue; +import org.apache.rocketmq.common.protocol.NamespaceUtil; +import org.apache.rocketmq.common.protocol.ResponseCode; +import org.apache.rocketmq.common.protocol.route.BrokerData; +import org.apache.rocketmq.common.protocol.route.TopicRouteData; +import org.apache.rocketmq.logging.InternalLogger; +import org.apache.rocketmq.logging.InternalLoggerFactory; +import org.apache.rocketmq.remoting.exception.RemotingException; + +import java.util.Collections; +import java.util.HashMap; +import java.util.Objects; +import java.util.Set; +import java.util.concurrent.ConcurrentHashMap; +import java.util.concurrent.ConcurrentMap; +import java.util.concurrent.Executors; +import java.util.concurrent.ScheduledExecutorService; +import java.util.concurrent.ThreadFactory; +import java.util.concurrent.TimeUnit; +import java.util.concurrent.locks.Lock; +import java.util.concurrent.locks.ReentrantLock; + +public class TopicRouteInfoManager { + + private static final long GET_TOPIC_ROUTE_TIMEOUT = 3000L; + private static final long LOCK_TIMEOUT_MILLIS = 3000L; + private static final InternalLogger log = InternalLoggerFactory.getLogger(LoggerName.BROKER_LOGGER_NAME); + + private final Lock lockNamesrv = new ReentrantLock(); + private final ConcurrentMap<String/* Topic */, TopicRouteData> topicRouteTable = new ConcurrentHashMap<>(); + private final ConcurrentMap<String/* Broker Name */, HashMap<Long/* brokerId */, String/* address */>> brokerAddrTable = + new ConcurrentHashMap<>(); + private final ConcurrentMap<String/* topic */, TopicPublishInfo> topicPublishInfoTable = new ConcurrentHashMap<>(); + + private final ConcurrentHashMap<String, Set<MessageQueue>> topicSubscribeInfoTable = new ConcurrentHashMap<>(); + + private ScheduledExecutorService scheduledExecutorService; + private BrokerController brokerController; + + public TopicRouteInfoManager(BrokerController brokerController) { + this.brokerController = brokerController; + } + + public void start() { + this.scheduledExecutorService = Executors.newSingleThreadScheduledExecutor(new ThreadFactory() { + @Override + public Thread newThread(Runnable r) { + return new Thread(r, "TopicRouteInfoManagerScheduledThread"); + } + }); + + this.scheduledExecutorService.scheduleAtFixedRate(() -> { + try { + updateTopicRouteInfoFromNameServer(); + } catch (Exception e) { + log.error("ScheduledTask: failed to pull TopicRouteData from NameServer", e); + } + }, 1000, this.brokerController.getBrokerConfig().getLoadBalancePollNameServerInterval(), TimeUnit.MILLISECONDS); + } + + private void updateTopicRouteInfoFromNameServer() { + final Set<String> topicSetForPopAssignment = this.topicSubscribeInfoTable.keySet(); + final Set<String> topicSetForEscapeBridge = this.topicRouteTable.keySet(); + final Set<String> topicsAll = Sets.union(topicSetForPopAssignment, topicSetForEscapeBridge); + + for (String topic : topicsAll) { + boolean isNeedUpdatePublishInfo = topicSetForEscapeBridge.contains(topic); + boolean isNeedUpdateSubscribeInfo = topicSetForPopAssignment.contains(topic); + updateTopicRouteInfoFromNameServer(topic, isNeedUpdatePublishInfo, isNeedUpdateSubscribeInfo); + } + } + + public void updateTopicRouteInfoFromNameServer(String topic, boolean isNeedUpdatePublishInfo, + boolean isNeedUpdateSubscribeInfo) { + try { + if (this.lockNamesrv.tryLock(LOCK_TIMEOUT_MILLIS, TimeUnit.MILLISECONDS)) { + try { + final TopicRouteData topicRouteData = this.brokerController.getBrokerOuterAPI() + .getTopicRouteInfoFromNameServer(topic, GET_TOPIC_ROUTE_TIMEOUT); + if (null == topicRouteData) { + log.warn("TopicRouteInfoManager: updateTopicRouteInfoFromNameServer, getTopicRouteInfoFromNameServer return null, Topic: {}.", topic); + return; + } + + if (isNeedUpdateSubscribeInfo) { + this.updateSubscribeInfoTable(topicRouteData, topic); + } + + if (isNeedUpdatePublishInfo) { + this.updateTopicRouteTable(topic, topicRouteData); + } + } catch (RemotingException e) { + log.error("updateTopicRouteInfoFromNameServer Exception", e); + } catch (MQBrokerException e) { + log.error("updateTopicRouteInfoFromNameServer Exception", e); + if (!NamespaceUtil.isRetryTopic(topic) + && ResponseCode.TOPIC_NOT_EXIST == e.getResponseCode()) { + // clean no used topic + cleanNoneRouteTopic(topic); + } + } finally { + this.lockNamesrv.unlock(); + } + } + } catch (InterruptedException e) { + log.warn("updateTopicRouteInfoFromNameServer Exception", e); + } + } + + private boolean updateTopicRouteTable(String topic, TopicRouteData topicRouteData) { + TopicRouteData old = this.topicRouteTable.get(topic); + boolean changed = this.topicRouteDataIsChange(old, topicRouteData); + if (!changed) { + if (!this.isNeedUpdateTopicRouteInfo(topic)) { + return false; + } + } else { + log.info("the topic[{}] route info changed, old[{}] ,new[{}]", topic, old, topicRouteData); + } + + for (BrokerData bd : topicRouteData.getBrokerDatas()) { + this.brokerAddrTable.put(bd.getBrokerName(), bd.getBrokerAddrs()); + } + + TopicPublishInfo publishInfo = MQClientInstance.topicRouteData2TopicPublishInfo(topic, topicRouteData); + publishInfo.setHaveTopicRouterInfo(true); + this.updateTopicPublishInfo(topic, publishInfo); + + TopicRouteData cloneTopicRouteData = new TopicRouteData(topicRouteData); + log.info("topicRouteTable.put. Topic = {}, TopicRouteData[{}]", topic, cloneTopicRouteData); + this.topicRouteTable.put(topic, cloneTopicRouteData); + + return true; + } + + private boolean updateSubscribeInfoTable(TopicRouteData topicRouteData, String topic) { + final TopicRouteData tmp = new TopicRouteData(topicRouteData); + tmp.setTopicQueueMappingByBroker(null); + Set<MessageQueue> newSubscribeInfo = MQClientInstance.topicRouteData2TopicSubscribeInfo(topic, tmp); + Set<MessageQueue> oldSubscribeInfo = topicSubscribeInfoTable.get(topic); + + if (Objects.equals(newSubscribeInfo, oldSubscribeInfo)) { + return false; + } + + log.info("the topic[{}] subscribe message queue changed, old[{}] ,new[{}]", topic, oldSubscribeInfo, newSubscribeInfo); + topicSubscribeInfoTable.put(topic, newSubscribeInfo); + return true; + + } + + private boolean isNeedUpdateTopicRouteInfo(final String topic) { + final TopicPublishInfo prev = this.topicPublishInfoTable.get(topic); + return null == prev || !prev.ok(); + } + + private boolean topicRouteDataIsChange(TopicRouteData olddata, TopicRouteData nowdata) { + if (olddata == null || nowdata == null) + return true; + TopicRouteData old = new TopicRouteData(olddata); + TopicRouteData now = new TopicRouteData(nowdata); + Collections.sort(old.getQueueDatas()); + Collections.sort(old.getBrokerDatas()); + Collections.sort(now.getQueueDatas()); + Collections.sort(now.getBrokerDatas()); + return !old.equals(now); + + } + + private void cleanNoneRouteTopic(String topic) { + // clean no used topic + topicSubscribeInfoTable.remove(topic); + } + + private void updateTopicPublishInfo(final String topic, final TopicPublishInfo info) { + if (info != null && topic != null) { + TopicPublishInfo prev = this.topicPublishInfoTable.put(topic, info); + if (prev != null) { + log.info("updateTopicPublishInfo prev is not null, " + prev); + } + } + } + + public void shutdown() { + if (null != this.scheduledExecutorService) { + this.scheduledExecutorService.shutdown(); + } + } + + public TopicPublishInfo tryToFindTopicPublishInfo(final String topic) { + TopicPublishInfo topicPublishInfo = this.topicPublishInfoTable.get(topic); + if (null == topicPublishInfo || !topicPublishInfo.ok()) { + this.topicPublishInfoTable.putIfAbsent(topic, new TopicPublishInfo()); + this.updateTopicRouteInfoFromNameServer(topic, true, false); + topicPublishInfo = this.topicPublishInfoTable.get(topic); + } + return topicPublishInfo; + } + + public String findBrokerAddressInPublish(String brokerName) { + if (brokerName == null) { + return null; + } + Map<Long/* brokerId */, String/* address */> map = this.brokerAddrTable.get(brokerName); + if (map != null && !map.isEmpty()) { + return map.get(MixAll.MASTER_ID); + } + + return null; + } + + public String findBrokerAddressInSubscribe( + final String brokerName, + final long brokerId, + final boolean onlyThisBroker + ) { + if (brokerName == null) { + return null; + } + String brokerAddr = null; + boolean found = false; + + Map<Long/* brokerId */, String/* address */> map = this.brokerAddrTable.get(brokerName); + if (map != null && !map.isEmpty()) { + brokerAddr = map.get(brokerId); + boolean slave = brokerId != MixAll.MASTER_ID; + found = brokerAddr != null; + + if (!found && slave) { + brokerAddr = map.get(brokerId + 1); + found = brokerAddr != null; + } + + if (!found && !onlyThisBroker) { + Map.Entry<Long, String> entry = map.entrySet().iterator().next(); + brokerAddr = entry.getValue(); + found = true; + } + } + + return brokerAddr; + + } + + public Set<MessageQueue> getTopicSubscribeInfo(String topic) { + Set<MessageQueue> queues = topicSubscribeInfoTable.get(topic); + if (null == queues || queues.isEmpty()) { + this.topicSubscribeInfoTable.put(topic, new HashSet<>()); Review Comment: This line is unnecessary, especially considering the concurrency issue -- This is an automated message from the Apache Git Service. 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