fuyou001 commented on code in PR #7301: URL: https://github.com/apache/rocketmq/pull/7301#discussion_r1334157744
########## controller/src/main/java/org/apache/rocketmq/controller/impl/JRaftController.java: ########## @@ -0,0 +1,280 @@ +/* + * 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.controller.impl; + +import com.alipay.sofa.jraft.Node; +import com.alipay.sofa.jraft.RaftGroupService; +import com.alipay.sofa.jraft.Status; +import com.alipay.sofa.jraft.conf.Configuration; +import com.alipay.sofa.jraft.entity.NodeId; +import com.alipay.sofa.jraft.entity.PeerId; +import com.alipay.sofa.jraft.entity.Task; +import com.alipay.sofa.jraft.option.NodeOptions; +import org.apache.commons.io.FileUtils; +import org.apache.rocketmq.common.ControllerConfig; +import org.apache.rocketmq.common.constant.LoggerName; +import org.apache.rocketmq.controller.Controller; +import org.apache.rocketmq.controller.helper.BrokerLifecycleListener; +import org.apache.rocketmq.controller.impl.closure.ControllerClosure; +import org.apache.rocketmq.controller.impl.task.BrokerCloseChannelRequest; +import org.apache.rocketmq.controller.impl.task.CheckNotActiveBrokerRequest; +import org.apache.rocketmq.controller.impl.task.GetBrokerLiveInfoRequest; +import org.apache.rocketmq.controller.impl.task.GetSyncStateDataRequest; +import org.apache.rocketmq.controller.impl.task.RaftBrokerHeartBeatEventRequest; +import org.apache.rocketmq.remoting.ChannelEventListener; +import org.apache.rocketmq.remoting.CommandCustomHeader; +import org.apache.rocketmq.remoting.RemotingServer; +import org.apache.rocketmq.remoting.netty.NettyRemotingServer; +import org.apache.rocketmq.remoting.netty.NettyServerConfig; +import org.apache.rocketmq.remoting.protocol.RemotingCommand; +import org.apache.rocketmq.remoting.protocol.RemotingSerializable; +import org.apache.rocketmq.remoting.protocol.RequestCode; +import org.apache.rocketmq.remoting.protocol.ResponseCode; +import org.apache.rocketmq.remoting.protocol.body.SyncStateSet; +import org.apache.rocketmq.remoting.protocol.header.controller.AlterSyncStateSetRequestHeader; +import org.apache.rocketmq.remoting.protocol.header.controller.ElectMasterRequestHeader; +import org.apache.rocketmq.remoting.protocol.header.controller.GetMetaDataResponseHeader; +import org.apache.rocketmq.remoting.protocol.header.controller.GetReplicaInfoRequestHeader; +import org.apache.rocketmq.remoting.protocol.header.controller.admin.CleanControllerBrokerDataRequestHeader; +import org.apache.rocketmq.remoting.protocol.header.controller.register.ApplyBrokerIdRequestHeader; +import org.apache.rocketmq.remoting.protocol.header.controller.register.GetNextBrokerIdRequestHeader; +import org.apache.rocketmq.remoting.protocol.header.controller.register.RegisterBrokerToControllerRequestHeader; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import java.io.File; +import java.io.IOException; +import java.util.ArrayList; +import java.util.HashMap; +import java.util.List; +import java.util.Map; +import java.util.concurrent.CompletableFuture; + +public class JRaftController implements Controller { + private static final Logger log = LoggerFactory.getLogger(LoggerName.CONTROLLER_LOGGER_NAME); + private final RaftGroupService raftGroupService; + private final Node node; + private final JRaftControllerStateMachine stateMachine; + private final ControllerConfig controllerConfig; + private final List<BrokerLifecycleListener> brokerLifecycleListeners; + private final Map<PeerId/* jRaft peerId */, String/* Controller RPC Server Addr */> peerIdToAddr; + private final NettyRemotingServer remotingServer; + + public JRaftController(ControllerConfig controllerConfig, + final ChannelEventListener channelEventListener) throws IOException { + this.controllerConfig = controllerConfig; + this.brokerLifecycleListeners = new ArrayList<>(); + + final NodeOptions nodeOptions = new NodeOptions(); + nodeOptions.setElectionTimeoutMs(controllerConfig.getjRaftElectionTimeoutMs()); + nodeOptions.setSnapshotIntervalSecs(controllerConfig.getjRaftSnapshotIntervalSecs()); + final PeerId serverId = new PeerId(); + if (!serverId.parse(controllerConfig.getjRaftServerId())) { + throw new IllegalArgumentException("Fail to parse serverId:" + controllerConfig.getjRaftServerId()); + } + final Configuration initConf = new Configuration(); + if (!initConf.parse(controllerConfig.getjRaftInitConf())) { + throw new IllegalArgumentException("Fail to parse initConf:" + controllerConfig.getjRaftInitConf()); + } + nodeOptions.setInitialConf(initConf); + + FileUtils.forceMkdir(new File(controllerConfig.getControllerStorePath())); + nodeOptions.setLogUri(controllerConfig.getControllerStorePath() + File.separator + "log"); + nodeOptions.setRaftMetaUri(controllerConfig.getControllerStorePath() + File.separator + "raft_meta"); + nodeOptions.setSnapshotUri(controllerConfig.getControllerStorePath() + File.separator + "snapshot"); + + this.stateMachine = new JRaftControllerStateMachine(controllerConfig, new NodeId(controllerConfig.getjRaftGroupId(), serverId)); + this.stateMachine.registerOnLeaderStart(this::onLeaderStart); + this.stateMachine.registerOnLeaderStop(this::onLeaderStop); + nodeOptions.setFsm(this.stateMachine); + + this.raftGroupService = new RaftGroupService(controllerConfig.getjRaftGroupId(), serverId, nodeOptions); + + this.peerIdToAddr = new HashMap<>(); + initPeerIdMap(); + + NettyServerConfig nettyServerConfig = new NettyServerConfig(); + nettyServerConfig.setListenPort(Integer.parseInt(this.peerIdToAddr.get(serverId).split(":")[1])); + remotingServer = new NettyRemotingServer(nettyServerConfig, channelEventListener); + + this.node = this.raftGroupService.start(); + } + + private void initPeerIdMap() { + String[] peers = this.controllerConfig.getjRaftInitConf().split(","); + String[] rpcAddrs = this.controllerConfig.getjRaftControllerRPCAddr().split(","); + for (int i = 0; i < peers.length; i++) { + PeerId peerId = new PeerId(); + if (!peerId.parse(peers[i])) { + throw new IllegalArgumentException("Fail to parse peerId:" + peers[i]); + } + this.peerIdToAddr.put(peerId, rpcAddrs[i]); + } + } + + @Override + public void startup() { + this.remotingServer.start(); + log.info("Controller {} started.", node.getNodeId()); + } + + @Override + public void shutdown() { + this.stopScheduling(); + this.raftGroupService.shutdown(); + this.remotingServer.shutdown(); + log.info("Controller {} stopped.", node.getNodeId()); + } + + @Override + public void startScheduling() { + } + + @Override + public void stopScheduling() { + } + + @Override + public boolean isLeaderState() { + return node.isLeader(); + } + + private <T extends CommandCustomHeader> CompletableFuture<RemotingCommand> applyToJRaft(RemotingCommand request) { + if (!isLeaderState()) { + final RemotingCommand command = RemotingCommand.createResponseCommand(ResponseCode.CONTROLLER_NOT_LEADER, "The controller is not in leader state"); + final CompletableFuture<RemotingCommand> future = new CompletableFuture<>(); + future.complete(command); + log.warn("Apply to none leader controller, controller state is {}", node.getNodeState()); + return future; + } + ControllerClosure closure = new ControllerClosure(request); + Task task = closure.taskWithThisClosure(); + if (task != null) { Review Comment: applyToJRaft方法调用jraft FSMCallerImpl#doCommitted 期间，doCommitted方法里会回调Closure，最后调到ControllerClosure#run方法，这里会返回结果给调用方。但之后doCommitted才会调用doApplyTasks，doApplyTasks方法最终调用JRaftControllerStateMachine#processEvent。 这里会不会有有并发问题，即processEvent方法还没有结束，ControllerClosure#run方法就返回结果给调用方了。 -- This is an automated message from the Apache Git Service. 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