fuyou001 commented on code in PR #7301: URL: https://github.com/apache/rocketmq/pull/7301#discussion_r1332889480
########## controller/src/main/java/org/apache/rocketmq/controller/impl/JRaftControllerStateMachine.java: ########## @@ -0,0 +1,344 @@ +/* + * 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.Closure; +import com.alipay.sofa.jraft.Iterator; +import com.alipay.sofa.jraft.StateMachine; +import com.alipay.sofa.jraft.Status; +import com.alipay.sofa.jraft.conf.Configuration; +import com.alipay.sofa.jraft.entity.LeaderChangeContext; +import com.alipay.sofa.jraft.entity.NodeId; +import com.alipay.sofa.jraft.error.RaftError; +import com.alipay.sofa.jraft.error.RaftException; +import com.alipay.sofa.jraft.storage.snapshot.SnapshotReader; +import com.alipay.sofa.jraft.storage.snapshot.SnapshotWriter; +import com.alipay.sofa.jraft.util.Utils; +import io.opentelemetry.api.common.AttributesBuilder; +import org.apache.commons.io.FileUtils; +import org.apache.rocketmq.common.ControllerConfig; +import org.apache.rocketmq.common.constant.LoggerName; +import org.apache.rocketmq.controller.elect.impl.DefaultElectPolicy; +import org.apache.rocketmq.controller.helper.BrokerLiveInfoGetter; +import org.apache.rocketmq.controller.helper.BrokerValidPredicate; +import org.apache.rocketmq.controller.impl.closure.ControllerClosure; +import org.apache.rocketmq.controller.impl.event.ControllerResult; +import org.apache.rocketmq.controller.impl.heartbeat.BrokerLiveInfo; +import org.apache.rocketmq.controller.impl.manager.RaftReplicasInfoManager; +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.controller.metrics.ControllerMetricsConstant; +import org.apache.rocketmq.controller.metrics.ControllerMetricsManager; +import org.apache.rocketmq.logging.org.slf4j.Logger; +import org.apache.rocketmq.logging.org.slf4j.LoggerFactory; +import org.apache.rocketmq.remoting.exception.RemotingCommandException; +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.AlterSyncStateSetResponseHeader; +import org.apache.rocketmq.remoting.protocol.header.controller.ElectMasterRequestHeader; +import org.apache.rocketmq.remoting.protocol.header.controller.ElectMasterResponseHeader; +import org.apache.rocketmq.remoting.protocol.header.controller.GetReplicaInfoRequestHeader; +import org.apache.rocketmq.remoting.protocol.header.controller.GetReplicaInfoResponseHeader; +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.ApplyBrokerIdResponseHeader; +import org.apache.rocketmq.remoting.protocol.header.controller.register.GetNextBrokerIdRequestHeader; +import org.apache.rocketmq.remoting.protocol.header.controller.register.GetNextBrokerIdResponseHeader; +import org.apache.rocketmq.remoting.protocol.header.controller.register.RegisterBrokerToControllerRequestHeader; + +import java.io.File; +import java.io.IOException; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.List; +import java.util.function.Consumer; + +import static org.apache.rocketmq.controller.metrics.ControllerMetricsConstant.LABEL_BROKER_SET; +import static org.apache.rocketmq.controller.metrics.ControllerMetricsConstant.LABEL_CLUSTER_NAME; +import static org.apache.rocketmq.controller.metrics.ControllerMetricsConstant.LABEL_ELECTION_RESULT; + +public class JRaftControllerStateMachine implements StateMachine { + private static final Logger log = LoggerFactory.getLogger(LoggerName.CONTROLLER_LOGGER_NAME); + private final List<Consumer<Long>> onLeaderStartCallbacks; + private final List<Consumer<Status>> onLeaderStopCallbacks; + private final RaftReplicasInfoManager replicasInfoManager; + private final NodeId nodeId; + + public JRaftControllerStateMachine(ControllerConfig controllerConfig, NodeId nodeId) { + this.replicasInfoManager = new RaftReplicasInfoManager(controllerConfig); + this.nodeId = nodeId; + this.onLeaderStartCallbacks = new ArrayList<>(); + this.onLeaderStopCallbacks = new ArrayList<>(); + } + + @Override + public void onApply(Iterator iter) { + while (iter.hasNext()) { + byte[] data = iter.getData().array(); + ControllerClosure controllerClosure = (ControllerClosure) iter.done(); + processEvent(controllerClosure, data, iter.getTerm(), iter.getIndex()); + + iter.next(); + } + } + + private void processEvent(ControllerClosure controllerClosure, byte[] data, long term, long index) { + RemotingCommand request; + ControllerResult<?> result; + try { + if (controllerClosure != null) { + request = controllerClosure.getRequestEvent(); + } else { + request = RemotingCommand.decode(Arrays.copyOfRange(data, 4, data.length)); + } + log.info("process event: term {}, index {}, request code {}", term, index, request.getCode()); + switch (request.getCode()) { + case RequestCode.CONTROLLER_ALTER_SYNC_STATE_SET: + AlterSyncStateSetRequestHeader requestHeader = (AlterSyncStateSetRequestHeader) request.decodeCommandCustomHeader(AlterSyncStateSetRequestHeader.class); + SyncStateSet syncStateSet = RemotingSerializable.decode(request.getBody(), SyncStateSet.class); + result = alterSyncStateSet(requestHeader, syncStateSet); + break; + case RequestCode.CONTROLLER_ELECT_MASTER: + ElectMasterRequestHeader electMasterRequestHeader = (ElectMasterRequestHeader) request.decodeCommandCustomHeader(ElectMasterRequestHeader.class); + result = electMaster(electMasterRequestHeader); + break; + case RequestCode.CONTROLLER_GET_NEXT_BROKER_ID: + GetNextBrokerIdRequestHeader getNextBrokerIdRequestHeader = (GetNextBrokerIdRequestHeader) request.decodeCommandCustomHeader(GetNextBrokerIdRequestHeader.class); + result = getNextBrokerId(getNextBrokerIdRequestHeader); + break; + case RequestCode.CONTROLLER_APPLY_BROKER_ID: + ApplyBrokerIdRequestHeader applyBrokerIdRequestHeader = (ApplyBrokerIdRequestHeader) request.decodeCommandCustomHeader(ApplyBrokerIdRequestHeader.class); + result = applyBrokerId(applyBrokerIdRequestHeader); + break; + case RequestCode.CONTROLLER_REGISTER_BROKER: + RegisterBrokerToControllerRequestHeader registerBrokerToControllerRequestHeader = (RegisterBrokerToControllerRequestHeader) request.decodeCommandCustomHeader(RegisterBrokerToControllerRequestHeader.class); + result = registerBroker(registerBrokerToControllerRequestHeader); + break; + case RequestCode.CONTROLLER_GET_REPLICA_INFO: + GetReplicaInfoRequestHeader getReplicaInfoRequestHeader = (GetReplicaInfoRequestHeader) request.decodeCommandCustomHeader(GetReplicaInfoRequestHeader.class); + result = getReplicaInfo(getReplicaInfoRequestHeader); + break; + case RequestCode.CONTROLLER_GET_SYNC_STATE_DATA: + List<String> brokerNames = RemotingSerializable.decode(request.getBody(), List.class); + GetSyncStateDataRequest getSyncStateDataRequest = (GetSyncStateDataRequest) request.decodeCommandCustomHeader(GetSyncStateDataRequest.class); + result = getSyncStateData(brokerNames, getSyncStateDataRequest.getInvokeTime()); + break; + case RequestCode.CLEAN_BROKER_DATA: + CleanControllerBrokerDataRequestHeader cleanBrokerDataRequestHeader = (CleanControllerBrokerDataRequestHeader) request.decodeCommandCustomHeader(CleanControllerBrokerDataRequestHeader.class); + result = cleanBrokerData(cleanBrokerDataRequestHeader); + break; + case RequestCode.GET_BROKER_LIVE_INFO_REQUEST: + GetBrokerLiveInfoRequest getBrokerLiveInfoRequest = (GetBrokerLiveInfoRequest) request.decodeCommandCustomHeader(GetBrokerLiveInfoRequest.class); + result = replicasInfoManager.getBrokerLiveInfo(getBrokerLiveInfoRequest); + break; + case RequestCode.RAFT_BROKER_HEART_BEAT_EVENT_REQUEST: + RaftBrokerHeartBeatEventRequest brokerHeartbeatRequestHeader = (RaftBrokerHeartBeatEventRequest) request.decodeCommandCustomHeader(RaftBrokerHeartBeatEventRequest.class); + result = replicasInfoManager.onBrokerHeartBeat(brokerHeartbeatRequestHeader); + break; + case RequestCode.BROKER_CLOSE_CHANNEL_REQUEST: + BrokerCloseChannelRequest brokerCloseChannelRequest = (BrokerCloseChannelRequest) request.decodeCommandCustomHeader(BrokerCloseChannelRequest.class); + result = replicasInfoManager.onBrokerCloseChannel(brokerCloseChannelRequest); + break; + case RequestCode.CHECK_NOT_ACTIVE_BROKER_REQUEST: + CheckNotActiveBrokerRequest checkNotActiveBrokerRequest = (CheckNotActiveBrokerRequest) request.decodeCommandCustomHeader(CheckNotActiveBrokerRequest.class); + result = replicasInfoManager.checkNotActiveBroker(checkNotActiveBrokerRequest); + break; + default: + throw new RemotingCommandException("Unknown request code: " + request.getCode()); + } + result.getEvents().forEach(replicasInfoManager::applyEvent); + } catch (RemotingCommandException e) { + log.error("Fail to process event", e); + if (controllerClosure != null) { + controllerClosure.run(new Status(RaftError.EINTERNAL, e.getMessage())); + } + return; + } + log.info("process event: term {}, index {}, request code {} success with result {}", term, index, request.getCode(), result.toString()); + if (controllerClosure != null) { + controllerClosure.setControllerResult(result); + controllerClosure.run(Status.OK()); + } + } + + private ControllerResult<AlterSyncStateSetResponseHeader> alterSyncStateSet( + AlterSyncStateSetRequestHeader requestHeader, SyncStateSet syncStateSet) { + return replicasInfoManager.alterSyncStateSet(requestHeader, syncStateSet, new RaftReplicasInfoManager.BrokerValidPredicateWithInvokeTime(requestHeader.getInvokeTime(), this.replicasInfoManager)); + } + + private ControllerResult<ElectMasterResponseHeader> electMaster(ElectMasterRequestHeader request) { + ControllerResult<ElectMasterResponseHeader> electResult = this.replicasInfoManager.electMaster(request, new DefaultElectPolicy( + new BrokerValidPredicate() { + @Override + public boolean check(String clusterName, String brokerName, Long brokerId) { Review Comment: Using lambda can be more concise and simpler in this scenario -- This is an automated message from the Apache Git Service. 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