/*
 * 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.out;

import java.io.UnsupportedEncodingException;
import java.net.InetAddress;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Set;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import org.apache.commons.lang3.StringUtils;
import org.apache.rocketmq.broker.latency.BrokerFixedThreadPoolExecutor;
import org.apache.rocketmq.client.consumer.PullResult;
import org.apache.rocketmq.client.consumer.PullStatus;
import org.apache.rocketmq.client.exception.MQBrokerException;
import org.apache.rocketmq.client.impl.consumer.PullResultExt;
import org.apache.rocketmq.client.producer.SendResult;
import org.apache.rocketmq.client.producer.SendStatus;
import org.apache.rocketmq.common.AbstractBrokerRunnable;
import org.apache.rocketmq.common.BrokerIdentity;
import org.apache.rocketmq.common.LockCallback;
import org.apache.rocketmq.common.MixAll;
import org.apache.rocketmq.common.Pair;
import org.apache.rocketmq.common.ThreadFactoryImpl;
import org.apache.rocketmq.common.TopicConfig;
import org.apache.rocketmq.common.UnlockCallback;
import org.apache.rocketmq.common.UtilAll;
import org.apache.rocketmq.common.constant.LoggerName;
import org.apache.rocketmq.common.filter.ExpressionType;
import org.apache.rocketmq.common.message.Message;
import org.apache.rocketmq.common.message.MessageAccessor;
import org.apache.rocketmq.common.message.MessageBatch;
import org.apache.rocketmq.common.message.MessageClientIDSetter;
import org.apache.rocketmq.common.message.MessageConst;
import org.apache.rocketmq.common.message.MessageDecoder;
import org.apache.rocketmq.common.message.MessageExt;
import org.apache.rocketmq.common.message.MessageQueue;
import org.apache.rocketmq.common.namesrv.DefaultTopAddressing;
import org.apache.rocketmq.common.namesrv.TopAddressing;
import org.apache.rocketmq.common.sysflag.PullSysFlag;
import org.apache.rocketmq.common.topic.TopicValidator;
import org.apache.rocketmq.logging.org.slf4j.Logger;
import org.apache.rocketmq.logging.org.slf4j.LoggerFactory;
import org.apache.rocketmq.remoting.InvokeCallback;
import org.apache.rocketmq.remoting.RPCHook;
import org.apache.rocketmq.remoting.RemotingClient;
import org.apache.rocketmq.remoting.exception.RemotingCommandException;
import org.apache.rocketmq.remoting.exception.RemotingConnectException;
import org.apache.rocketmq.remoting.exception.RemotingException;
import org.apache.rocketmq.remoting.exception.RemotingSendRequestException;
import org.apache.rocketmq.remoting.exception.RemotingTimeoutException;
import org.apache.rocketmq.remoting.exception.RemotingTooMuchRequestException;
import org.apache.rocketmq.remoting.netty.NettyClientConfig;
import org.apache.rocketmq.remoting.netty.NettyRemotingClient;
import org.apache.rocketmq.remoting.protocol.BrokerSyncInfo;
import org.apache.rocketmq.remoting.protocol.DataVersion;
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.BrokerMemberGroup;
import org.apache.rocketmq.remoting.protocol.body.ClusterInfo;
import org.apache.rocketmq.remoting.protocol.body.ConsumerOffsetSerializeWrapper;
import org.apache.rocketmq.remoting.protocol.body.ElectMasterResponseBody;
import org.apache.rocketmq.remoting.protocol.body.GetBrokerMemberGroupResponseBody;
import org.apache.rocketmq.remoting.protocol.body.KVTable;
import org.apache.rocketmq.remoting.protocol.body.LockBatchRequestBody;
import org.apache.rocketmq.remoting.protocol.body.LockBatchResponseBody;
import org.apache.rocketmq.remoting.protocol.body.MessageRequestModeSerializeWrapper;
import org.apache.rocketmq.remoting.protocol.body.RegisterBrokerBody;
import org.apache.rocketmq.remoting.protocol.body.SubscriptionGroupWrapper;
import org.apache.rocketmq.remoting.protocol.body.SyncStateSet;
import org.apache.rocketmq.remoting.protocol.body.TopicConfigAndMappingSerializeWrapper;
import org.apache.rocketmq.remoting.protocol.body.TopicConfigSerializeWrapper;
import org.apache.rocketmq.remoting.protocol.body.UnlockBatchRequestBody;
import org.apache.rocketmq.remoting.protocol.header.ExchangeHAInfoRequestHeader;
import org.apache.rocketmq.remoting.protocol.header.ExchangeHAInfoResponseHeader;
import org.apache.rocketmq.remoting.protocol.header.GetBrokerMemberGroupRequestHeader;
import org.apache.rocketmq.remoting.protocol.header.GetMaxOffsetRequestHeader;
import org.apache.rocketmq.remoting.protocol.header.GetMaxOffsetResponseHeader;
import org.apache.rocketmq.remoting.protocol.header.GetMinOffsetRequestHeader;
import org.apache.rocketmq.remoting.protocol.header.GetMinOffsetResponseHeader;
import org.apache.rocketmq.remoting.protocol.header.PullMessageRequestHeader;
import org.apache.rocketmq.remoting.protocol.header.PullMessageResponseHeader;
import org.apache.rocketmq.remoting.protocol.header.SendMessageRequestHeader;
import org.apache.rocketmq.remoting.protocol.header.SendMessageRequestHeaderV2;
import org.apache.rocketmq.remoting.protocol.header.SendMessageResponseHeader;
import org.apache.rocketmq.remoting.protocol.header.controller.AlterSyncStateSetRequestHeader;
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.GetReplicaInfoResponseHeader;
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 org.apache.rocketmq.remoting.protocol.header.controller.register.RegisterBrokerToControllerResponseHeader;
import org.apache.rocketmq.remoting.protocol.header.namesrv.BrokerHeartbeatRequestHeader;
import org.apache.rocketmq.remoting.protocol.header.namesrv.GetRouteInfoRequestHeader;
import org.apache.rocketmq.remoting.protocol.header.namesrv.QueryDataVersionRequestHeader;
import org.apache.rocketmq.remoting.protocol.header.namesrv.QueryDataVersionResponseHeader;
import org.apache.rocketmq.remoting.protocol.header.namesrv.RegisterBrokerRequestHeader;
import org.apache.rocketmq.remoting.protocol.header.namesrv.RegisterBrokerResponseHeader;
import org.apache.rocketmq.remoting.protocol.header.namesrv.RegisterTopicRequestHeader;
import org.apache.rocketmq.remoting.protocol.header.namesrv.UnRegisterBrokerRequestHeader;
import org.apache.rocketmq.remoting.protocol.header.controller.ElectMasterRequestHeader;
import org.apache.rocketmq.remoting.protocol.header.controller.ElectMasterResponseHeader;
import org.apache.rocketmq.remoting.protocol.heartbeat.SubscriptionData;
import org.apache.rocketmq.remoting.protocol.namesrv.RegisterBrokerResult;
import org.apache.rocketmq.remoting.protocol.route.BrokerData;
import org.apache.rocketmq.remoting.protocol.route.QueueData;
import org.apache.rocketmq.remoting.protocol.route.TopicRouteData;
import org.apache.rocketmq.remoting.rpc.ClientMetadata;
import org.apache.rocketmq.remoting.rpc.RpcClient;
import org.apache.rocketmq.remoting.rpc.RpcClientImpl;
import org.apache.rocketmq.remoting.rpchook.DynamicalExtFieldRPCHook;
import org.apache.rocketmq.store.timer.TimerCheckpoint;
import org.apache.rocketmq.store.timer.TimerMetrics;

import static org.apache.rocketmq.remoting.protocol.RemotingSysResponseCode.SUCCESS;
import static org.apache.rocketmq.remoting.protocol.ResponseCode.CONTROLLER_MASTER_STILL_EXIST;

public class BrokerOuterAPI {
    private static final Logger LOGGER = LoggerFactory.getLogger(LoggerName.BROKER_LOGGER_NAME);
    private final RemotingClient remotingClient;
    private final TopAddressing topAddressing = new DefaultTopAddressing(MixAll.getWSAddr());
    private final BrokerFixedThreadPoolExecutor brokerOuterExecutor = new BrokerFixedThreadPoolExecutor(4, 10, 1, TimeUnit.MINUTES,
            new ArrayBlockingQueue<>(32), new ThreadFactoryImpl("brokerOutApi_thread_", true));
    private final ClientMetadata clientMetadata;
    private final RpcClient rpcClient;
    private String nameSrvAddr = null;


    public BrokerOuterAPI(final NettyClientConfig nettyClientConfig) {
        this(nettyClientConfig, new DynamicalExtFieldRPCHook(), new ClientMetadata());
    }

    private BrokerOuterAPI(final NettyClientConfig nettyClientConfig, RPCHook rpcHook, ClientMetadata clientMetadata) {
        this.remotingClient = new NettyRemotingClient(nettyClientConfig);
        this.clientMetadata = clientMetadata;
        this.remotingClient.registerRPCHook(rpcHook);
        this.rpcClient = new RpcClientImpl(this.clientMetadata, this.remotingClient);
    }

    public void start() {
        this.remotingClient.start();
    }

    public void shutdown() {
        this.remotingClient.shutdown();
        this.brokerOuterExecutor.shutdown();
    }

    public List<String> getNameServerAddressList() {
        return this.remotingClient.getNameServerAddressList();
    }

    public String fetchNameServerAddr() {
        try {
            String addrs = this.topAddressing.fetchNSAddr();
            if (!UtilAll.isBlank(addrs)) {
                if (!addrs.equals(this.nameSrvAddr)) {
                    LOGGER.info("name server address changed, old: {} new: {}", this.nameSrvAddr, addrs);
                    this.updateNameServerAddressList(addrs);
                    this.nameSrvAddr = addrs;
                    return nameSrvAddr;
                }
            }
        } catch (Exception e) {
            LOGGER.error("fetchNameServerAddr Exception", e);
        }
        return nameSrvAddr;
    }

    public List<String> dnsLookupAddressByDomain(String domain) {
        List<String> addressList = new ArrayList<>();
        try {
            java.security.Security.setProperty("networkaddress.cache.ttl", "10");
            int index = domain.indexOf(":");
            String portStr = domain.substring(index);
            String domainStr = domain.substring(0, index);
            InetAddress[] addresses = InetAddress.getAllByName(domainStr);
            for (InetAddress address : addresses) {
                addressList.add(address.getHostAddress() + portStr);
            }
            LOGGER.info("dns lookup address by domain success, domain={}, result={}", domain, addressList);
        } catch (Exception e) {
            LOGGER.error("dns lookup address by domain error, domain={}", domain, e);
        }
        return addressList;
    }

    public boolean checkAddressReachable(String address) {
        return this.remotingClient.isAddressReachable(address);
    }

    public void updateNameServerAddressList(final String addrs) {
        String[] addrArray = addrs.split(";");
        List<String> lst = new ArrayList<String>(Arrays.asList(addrArray));
        this.remotingClient.updateNameServerAddressList(lst);
    }

    public void updateNameServerAddressListByDnsLookup(final String domain) {
        List<String> lst = this.dnsLookupAddressByDomain(domain);
        this.remotingClient.updateNameServerAddressList(lst);
    }

    public BrokerMemberGroup syncBrokerMemberGroup(String clusterName, String brokerName)
        throws InterruptedException, RemotingTimeoutException, RemotingSendRequestException, RemotingConnectException {
        return syncBrokerMemberGroup(clusterName, brokerName, false);
    }

    public BrokerMemberGroup syncBrokerMemberGroup(String clusterName, String brokerName,
        boolean isCompatibleWithOldNameSrv)
        throws InterruptedException, RemotingTimeoutException, RemotingSendRequestException, RemotingConnectException {
        if (isCompatibleWithOldNameSrv) {
            return getBrokerMemberGroupCompatible(clusterName, brokerName);
        } else {
            return getBrokerMemberGroup(clusterName, brokerName);
        }
    }

    public BrokerMemberGroup getBrokerMemberGroup(String clusterName, String brokerName)
        throws InterruptedException, RemotingTimeoutException, RemotingSendRequestException, RemotingConnectException {
        BrokerMemberGroup brokerMemberGroup = new BrokerMemberGroup(clusterName, brokerName);

        GetBrokerMemberGroupRequestHeader requestHeader = new GetBrokerMemberGroupRequestHeader();
        requestHeader.setClusterName(clusterName);
        requestHeader.setBrokerName(brokerName);

        RemotingCommand request = RemotingCommand.createRequestCommand(RequestCode.GET_BROKER_MEMBER_GROUP, requestHeader);

        RemotingCommand response = null;
        response = this.remotingClient.invokeSync(null, request, 3000);
        assert response != null;

        switch (response.getCode()) {
            case ResponseCode.SUCCESS: {
                byte[] body = response.getBody();
                if (body != null) {
                    GetBrokerMemberGroupResponseBody brokerMemberGroupResponseBody =
                        GetBrokerMemberGroupResponseBody.decode(body, GetBrokerMemberGroupResponseBody.class);

                    return brokerMemberGroupResponseBody.getBrokerMemberGroup();
                }
            }
            default:
                break;
        }

        return brokerMemberGroup;
    }

    public BrokerMemberGroup getBrokerMemberGroupCompatible(String clusterName, String brokerName)
        throws InterruptedException, RemotingTimeoutException, RemotingSendRequestException, RemotingConnectException {
        BrokerMemberGroup brokerMemberGroup = new BrokerMemberGroup(clusterName, brokerName);

        GetRouteInfoRequestHeader requestHeader = new GetRouteInfoRequestHeader();
        requestHeader.setTopic(TopicValidator.SYNC_BROKER_MEMBER_GROUP_PREFIX + brokerName);

        RemotingCommand request = RemotingCommand.createRequestCommand(RequestCode.GET_ROUTEINFO_BY_TOPIC, requestHeader);

        RemotingCommand response;
        response = this.remotingClient.invokeSync(null, request, 3000);
        assert response != null;

        switch (response.getCode()) {
            case ResponseCode.SUCCESS: {
                byte[] body = response.getBody();
                if (body != null) {
                    TopicRouteData topicRouteData = TopicRouteData.decode(body, TopicRouteData.class);
                    for (BrokerData brokerData : topicRouteData.getBrokerDatas()) {
                        if (brokerData != null
                            && brokerData.getBrokerName().equals(brokerName)
                            && brokerData.getCluster().equals(clusterName)) {
                            brokerMemberGroup.getBrokerAddrs().putAll(brokerData.getBrokerAddrs());
                            break;
                        }
                    }
                    return brokerMemberGroup;
                }
            }
            default:
                break;
        }

        return brokerMemberGroup;
    }

    public void sendHeartbeatViaDataVersion(
        final String clusterName,
        final String brokerAddr,
        final String brokerName,
        final Long brokerId,
        final int timeoutMillis,
        final DataVersion dataVersion,
        final boolean isInBrokerContainer) {
        List<String> nameServerAddressList = this.remotingClient.getAvailableNameSrvList();
        if (nameServerAddressList != null && nameServerAddressList.size() > 0) {
            final QueryDataVersionRequestHeader requestHeader = new QueryDataVersionRequestHeader();
            requestHeader.setBrokerAddr(brokerAddr);
            requestHeader.setBrokerName(brokerName);
            requestHeader.setBrokerId(brokerId);
            requestHeader.setClusterName(clusterName);

            for (final String namesrvAddr : nameServerAddressList) {
                brokerOuterExecutor.execute(new AbstractBrokerRunnable(new BrokerIdentity(clusterName, brokerName, brokerId, isInBrokerContainer)) {

                    @Override
                    public void run0() {
                        RemotingCommand request = RemotingCommand.createRequestCommand(RequestCode.QUERY_DATA_VERSION, requestHeader);
                        request.setBody(dataVersion.encode());

                        try {
                            BrokerOuterAPI.this.remotingClient.invokeOneway(namesrvAddr, request, timeoutMillis);
                        } catch (Exception e) {
                            LOGGER.error("sendHeartbeat Exception " + namesrvAddr, e);
                        }
                    }
                });
            }
        }
    }

    public void sendHeartbeat(final String clusterName,
        final String brokerAddr,
        final String brokerName,
        final Long brokerId,
        final int timeoutMills,
        final boolean isInBrokerContainer) {
        List<String> nameServerAddressList = this.remotingClient.getAvailableNameSrvList();

        final BrokerHeartbeatRequestHeader requestHeader = new BrokerHeartbeatRequestHeader();
        requestHeader.setClusterName(clusterName);
        requestHeader.setBrokerAddr(brokerAddr);
        requestHeader.setBrokerName(brokerName);

        if (nameServerAddressList != null && nameServerAddressList.size() > 0) {
            for (final String namesrvAddr : nameServerAddressList) {
                brokerOuterExecutor.execute(new AbstractBrokerRunnable(new BrokerIdentity(clusterName, brokerName, brokerId, isInBrokerContainer)) {
                    @Override
                    public void run0() {
                        RemotingCommand request = RemotingCommand.createRequestCommand(RequestCode.BROKER_HEARTBEAT, requestHeader);

                        try {
                            BrokerOuterAPI.this.remotingClient.invokeOneway(namesrvAddr, request, timeoutMills);
                        } catch (Exception e) {
                            LOGGER.error("sendHeartbeat Exception " + namesrvAddr, e);
                        }
                    }
                });
            }
        }
    }

    public BrokerSyncInfo retrieveBrokerHaInfo(String masterBrokerAddr)
        throws InterruptedException, RemotingTimeoutException, RemotingSendRequestException, RemotingConnectException,
        MQBrokerException, RemotingCommandException {
        ExchangeHAInfoRequestHeader requestHeader = new ExchangeHAInfoRequestHeader();
        requestHeader.setMasterHaAddress(null);

        RemotingCommand request = RemotingCommand.createRequestCommand(RequestCode.EXCHANGE_BROKER_HA_INFO, requestHeader);

        RemotingCommand response = this.remotingClient.invokeSync(masterBrokerAddr, request, 3000);
        assert response != null;
        switch (response.getCode()) {
            case ResponseCode.SUCCESS: {
                ExchangeHAInfoResponseHeader responseHeader = (ExchangeHAInfoResponseHeader) response.decodeCommandCustomHeader(ExchangeHAInfoResponseHeader.class);
                return new BrokerSyncInfo(responseHeader.getMasterHaAddress(), responseHeader.getMasterFlushOffset(), responseHeader.getMasterAddress());
            }
            default:
                break;
        }

        throw new MQBrokerException(response.getCode(), response.getRemark());
    }

    public void sendBrokerHaInfo(String brokerAddr, String masterHaAddr, long brokerInitMaxOffset, String masterAddr)
        throws InterruptedException, RemotingTimeoutException, RemotingSendRequestException, RemotingConnectException, MQBrokerException {
        ExchangeHAInfoRequestHeader requestHeader = new ExchangeHAInfoRequestHeader();
        requestHeader.setMasterHaAddress(masterHaAddr);
        requestHeader.setMasterFlushOffset(brokerInitMaxOffset);
        requestHeader.setMasterAddress(masterAddr);

        RemotingCommand request = RemotingCommand.createRequestCommand(RequestCode.EXCHANGE_BROKER_HA_INFO, requestHeader);

        RemotingCommand response = this.remotingClient.invokeSync(brokerAddr, request, 3000);

        assert response != null;
        switch (response.getCode()) {
            case ResponseCode.SUCCESS: {
                return;
            }
            default:
                break;
        }

        throw new MQBrokerException(response.getCode(), response.getRemark());
    }

    public List<RegisterBrokerResult> registerBrokerAll(
        final String clusterName,
        final String brokerAddr,
        final String brokerName,
        final long brokerId,
        final String haServerAddr,
        final TopicConfigSerializeWrapper topicConfigWrapper,
        final List<String> filterServerList,
        final boolean oneway,
        final int timeoutMills,
        final boolean enableActingMaster,
        final boolean compressed,
        final BrokerIdentity brokerIdentity) {
        return registerBrokerAll(clusterName,
            brokerAddr,
            brokerName,
            brokerId,
            haServerAddr,
            topicConfigWrapper,
            filterServerList,
            oneway, timeoutMills,
            enableActingMaster,
            compressed,
            null,
            brokerIdentity);
    }

    /**
     * Considering compression brings much CPU overhead to name server, stream API will not support compression and
     * compression feature is deprecated.
     *
     * @param clusterName
     * @param brokerAddr
     * @param brokerName
     * @param brokerId
     * @param haServerAddr
     * @param topicConfigWrapper
     * @param filterServerList
     * @param oneway
     * @param timeoutMills
     * @param compressed default false
     * @return
     */
    public List<RegisterBrokerResult> registerBrokerAll(
        final String clusterName,
        final String brokerAddr,
        final String brokerName,
        final long brokerId,
        final String haServerAddr,
        final TopicConfigSerializeWrapper topicConfigWrapper,
        final List<String> filterServerList,
        final boolean oneway,
        final int timeoutMills,
        final boolean enableActingMaster,
        final boolean compressed,
        final Long heartbeatTimeoutMillis,
        final BrokerIdentity brokerIdentity) {

        final List<RegisterBrokerResult> registerBrokerResultList = new CopyOnWriteArrayList<>();
        List<String> nameServerAddressList = this.remotingClient.getAvailableNameSrvList();
        if (nameServerAddressList != null && nameServerAddressList.size() > 0) {

            final RegisterBrokerRequestHeader requestHeader = new RegisterBrokerRequestHeader();
            requestHeader.setBrokerAddr(brokerAddr);
            requestHeader.setBrokerId(brokerId);
            requestHeader.setBrokerName(brokerName);
            requestHeader.setClusterName(clusterName);
            requestHeader.setHaServerAddr(haServerAddr);
            requestHeader.setEnableActingMaster(enableActingMaster);
            requestHeader.setCompressed(false);
            if (heartbeatTimeoutMillis != null) {
                requestHeader.setHeartbeatTimeoutMillis(heartbeatTimeoutMillis);
            }

            RegisterBrokerBody requestBody = new RegisterBrokerBody();
            requestBody.setTopicConfigSerializeWrapper(TopicConfigAndMappingSerializeWrapper.from(topicConfigWrapper));
            requestBody.setFilterServerList(filterServerList);
            final byte[] body = requestBody.encode(compressed);
            final int bodyCrc32 = UtilAll.crc32(body);
            requestHeader.setBodyCrc32(bodyCrc32);
            final CountDownLatch countDownLatch = new CountDownLatch(nameServerAddressList.size());
            for (final String namesrvAddr : nameServerAddressList) {
                brokerOuterExecutor.execute(new AbstractBrokerRunnable(brokerIdentity) {
                    @Override
                    public void run0() {
                        try {
                            RegisterBrokerResult result = registerBroker(namesrvAddr, oneway, timeoutMills, requestHeader, body);
                            if (result != null) {
                                registerBrokerResultList.add(result);
                            }

                            LOGGER.info("Registering current broker to name server completed. TargetHost={}", namesrvAddr);
                        } catch (Exception e) {
                            LOGGER.error("Failed to register current broker to name server. TargetHost={}", namesrvAddr, e);
                        } finally {
                            countDownLatch.countDown();
                        }
                    }
                });
            }

            try {
                if (!countDownLatch.await(timeoutMills, TimeUnit.MILLISECONDS)) {
                    LOGGER.warn("Registration to one or more name servers does NOT complete within deadline. Timeout threshold: {}ms", timeoutMills);
                }
            } catch (InterruptedException ignore) {
            }
        }

        return registerBrokerResultList;
    }

    private RegisterBrokerResult registerBroker(
        final String namesrvAddr,
        final boolean oneway,
        final int timeoutMills,
        final RegisterBrokerRequestHeader requestHeader,
        final byte[] body
    ) throws RemotingCommandException, MQBrokerException, RemotingConnectException, RemotingSendRequestException, RemotingTimeoutException,
        InterruptedException {
        RemotingCommand request = RemotingCommand.createRequestCommand(RequestCode.REGISTER_BROKER, requestHeader);
        request.setBody(body);

        if (oneway) {
            try {
                this.remotingClient.invokeOneway(namesrvAddr, request, timeoutMills);
            } catch (RemotingTooMuchRequestException e) {
                // Ignore
            }
            return null;
        }

        RemotingCommand response = this.remotingClient.invokeSync(namesrvAddr, request, timeoutMills);
        assert response != null;
        switch (response.getCode()) {
            case ResponseCode.SUCCESS: {
                RegisterBrokerResponseHeader responseHeader =
                    (RegisterBrokerResponseHeader) response.decodeCommandCustomHeader(RegisterBrokerResponseHeader.class);
                RegisterBrokerResult result = new RegisterBrokerResult();
                result.setMasterAddr(responseHeader.getMasterAddr());
                result.setHaServerAddr(responseHeader.getHaServerAddr());
                if (response.getBody() != null) {
                    result.setKvTable(KVTable.decode(response.getBody(), KVTable.class));
                }
                return result;
            }
            default:
                break;
        }

        throw new MQBrokerException(response.getCode(), response.getRemark(), requestHeader == null ? null : requestHeader.getBrokerAddr());
    }

    public void unregisterBrokerAll(
        final String clusterName,
        final String brokerAddr,
        final String brokerName,
        final long brokerId
    ) {
        List<String> nameServerAddressList = this.remotingClient.getNameServerAddressList();
        if (nameServerAddressList != null) {
            for (String namesrvAddr : nameServerAddressList) {
                try {
                    this.unregisterBroker(namesrvAddr, clusterName, brokerAddr, brokerName, brokerId);
                    LOGGER.info("unregisterBroker OK, NamesrvAddr: {}", namesrvAddr);
                } catch (Exception e) {
                    LOGGER.warn("unregisterBroker Exception, NamesrvAddr: {}", namesrvAddr, e);
                }
            }
        }
    }

    public void unregisterBroker(
        final String namesrvAddr,
        final String clusterName,
        final String brokerAddr,
        final String brokerName,
        final long brokerId
    ) throws RemotingConnectException, RemotingSendRequestException, RemotingTimeoutException, InterruptedException, MQBrokerException {
        UnRegisterBrokerRequestHeader requestHeader = new UnRegisterBrokerRequestHeader();
        requestHeader.setBrokerAddr(brokerAddr);
        requestHeader.setBrokerId(brokerId);
        requestHeader.setBrokerName(brokerName);
        requestHeader.setClusterName(clusterName);
        RemotingCommand request = RemotingCommand.createRequestCommand(RequestCode.UNREGISTER_BROKER, requestHeader);

        RemotingCommand response = this.remotingClient.invokeSync(namesrvAddr, request, 3000);
        assert response != null;
        switch (response.getCode()) {
            case ResponseCode.SUCCESS: {
                return;
            }
            default:
                break;
        }

        throw new MQBrokerException(response.getCode(), response.getRemark(), brokerAddr);
    }

    /**
     * Register the topic route info of single topic to all name server nodes.
     * This method is used to replace incremental broker registration feature.
     */
    public void registerSingleTopicAll(
        final String brokerName,
        final TopicConfig topicConfig,
        final int timeoutMills) {
        String topic = topicConfig.getTopicName();
        RegisterTopicRequestHeader requestHeader = new RegisterTopicRequestHeader();
        requestHeader.setTopic(topic);

        TopicRouteData topicRouteData = new TopicRouteData();
        List<QueueData> queueDatas = new ArrayList<>();
        topicRouteData.setQueueDatas(queueDatas);

        final QueueData queueData = new QueueData();
        queueData.setBrokerName(brokerName);
        queueData.setPerm(topicConfig.getPerm());
        queueData.setReadQueueNums(topicConfig.getReadQueueNums());
        queueData.setWriteQueueNums(topicConfig.getWriteQueueNums());
        queueData.setTopicSysFlag(topicConfig.getTopicSysFlag());
        queueDatas.add(queueData);
        final byte[] topicRouteBody = topicRouteData.encode();


        List<String> nameServerAddressList = this.remotingClient.getNameServerAddressList();
        final CountDownLatch countDownLatch = new CountDownLatch(nameServerAddressList.size());
        for (final String namesrvAddr : nameServerAddressList) {
            RemotingCommand request = RemotingCommand.createRequestCommand(RequestCode.REGISTER_TOPIC_IN_NAMESRV, requestHeader);
            request.setBody(topicRouteBody);

            try {
                brokerOuterExecutor.execute(() -> {
                    try {
                        RemotingCommand response = BrokerOuterAPI.this.remotingClient.invokeSync(namesrvAddr, request, timeoutMills);
                        assert response != null;
                        LOGGER.info("Register single topic {} to broker {} with response code {}", topic, brokerName, response.getCode());
                    } catch (Exception e) {
                        LOGGER.warn("Register single topic {} to broker {} exception", topic, brokerName, e);
                    } finally {
                        countDownLatch.countDown();
                    }
                });
            } catch (Exception e) {
                LOGGER.warn("Execute single topic registration task failed, topic {}, broker name {}", topic, brokerName);
                countDownLatch.countDown();
            }

        }

        try {
            if (!countDownLatch.await(timeoutMills, TimeUnit.MILLISECONDS)) {
                LOGGER.warn("Registration single topic to one or more name servers timeout. Timeout threshold: {}ms", timeoutMills);
            }
        } catch (InterruptedException ignore) {
        }
    }

    public List<Boolean> needRegister(
        final String clusterName,
        final String brokerAddr,
        final String brokerName,
        final long brokerId,
        final TopicConfigSerializeWrapper topicConfigWrapper,
        final int timeoutMills,
        final boolean isInBrokerContainer) {
        final List<Boolean> changedList = new CopyOnWriteArrayList<>();
        List<String> nameServerAddressList = this.remotingClient.getNameServerAddressList();
        if (nameServerAddressList != null && nameServerAddressList.size() > 0) {
            final CountDownLatch countDownLatch = new CountDownLatch(nameServerAddressList.size());
            for (final String namesrvAddr : nameServerAddressList) {
                brokerOuterExecutor.execute(new AbstractBrokerRunnable(new BrokerIdentity(clusterName, brokerName, brokerId, isInBrokerContainer)) {
                    @Override
                    public void run0() {
                        try {
                            QueryDataVersionRequestHeader requestHeader = new QueryDataVersionRequestHeader();
                            requestHeader.setBrokerAddr(brokerAddr);
                            requestHeader.setBrokerId(brokerId);
                            requestHeader.setBrokerName(brokerName);
                            requestHeader.setClusterName(clusterName);
                            RemotingCommand request = RemotingCommand.createRequestCommand(RequestCode.QUERY_DATA_VERSION, requestHeader);
                            request.setBody(topicConfigWrapper.getDataVersion().encode());
                            RemotingCommand response = remotingClient.invokeSync(namesrvAddr, request, timeoutMills);
                            DataVersion nameServerDataVersion = null;
                            Boolean changed = false;
                            switch (response.getCode()) {
                                case ResponseCode.SUCCESS: {
                                    QueryDataVersionResponseHeader queryDataVersionResponseHeader =
                                        (QueryDataVersionResponseHeader) response.decodeCommandCustomHeader(QueryDataVersionResponseHeader.class);
                                    changed = queryDataVersionResponseHeader.getChanged();
                                    byte[] body = response.getBody();
                                    if (body != null) {
                                        nameServerDataVersion = DataVersion.decode(body, DataVersion.class);
                                        if (!topicConfigWrapper.getDataVersion().equals(nameServerDataVersion)) {
                                            changed = true;
                                        }
                                    }
                                    if (changed == null || changed) {
                                        changedList.add(Boolean.TRUE);
                                    }
                                }
                                default:
                                    break;
                            }
                            LOGGER.warn("Query data version from name server {} OK, changed {}, broker {}, name server {}", namesrvAddr, changed, topicConfigWrapper.getDataVersion(), nameServerDataVersion == null ? "" : nameServerDataVersion);
                        } catch (Exception e) {
                            changedList.add(Boolean.TRUE);
                            LOGGER.error("Query data version from name server {} exception", namesrvAddr, e);
                        } finally {
                            countDownLatch.countDown();
                        }
                    }
                });

            }
            try {
                countDownLatch.await(timeoutMills, TimeUnit.MILLISECONDS);
            } catch (InterruptedException e) {
                LOGGER.error("query dataversion from nameserver countDownLatch await Exception", e);
            }
        }
        return changedList;
    }

    public TopicConfigAndMappingSerializeWrapper getAllTopicConfig(
        final String addr) throws RemotingConnectException, RemotingSendRequestException,
        RemotingTimeoutException, InterruptedException, MQBrokerException {
        RemotingCommand request = RemotingCommand.createRequestCommand(RequestCode.GET_ALL_TOPIC_CONFIG, null);

        RemotingCommand response = this.remotingClient.invokeSync(MixAll.brokerVIPChannel(true, addr), request, 3000);
        assert response != null;
        switch (response.getCode()) {
            case ResponseCode.SUCCESS: {
                return TopicConfigSerializeWrapper.decode(response.getBody(), TopicConfigAndMappingSerializeWrapper.class);
            }
            default:
                break;
        }

        throw new MQBrokerException(response.getCode(), response.getRemark(), addr);
    }

    public TimerCheckpoint getTimerCheckPoint(
        final String addr) throws RemotingConnectException, RemotingSendRequestException,
        RemotingTimeoutException, InterruptedException, MQBrokerException {
        RemotingCommand request = RemotingCommand.createRequestCommand(RequestCode.GET_TIMER_CHECK_POINT, null);

        RemotingCommand response = this.remotingClient.invokeSync(MixAll.brokerVIPChannel(true, addr), request, 3000);
        assert response != null;
        switch (response.getCode()) {
            case ResponseCode.SUCCESS: {
                return TimerCheckpoint.decode(ByteBuffer.wrap(response.getBody()));
            }
            default:
                break;
        }

        throw new MQBrokerException(response.getCode(), response.getRemark(), addr);
    }

    public TimerMetrics.TimerMetricsSerializeWrapper getTimerMetrics(
        final String addr) throws RemotingConnectException, RemotingSendRequestException,
        RemotingTimeoutException, InterruptedException, MQBrokerException {
        RemotingCommand request = RemotingCommand.createRequestCommand(RequestCode.GET_TIMER_METRICS, null);

        RemotingCommand response = this.remotingClient.invokeSync(MixAll.brokerVIPChannel(true, addr), request, 3000);
        assert response != null;
        switch (response.getCode()) {
            case ResponseCode.SUCCESS: {
                return TimerMetrics.TimerMetricsSerializeWrapper.decode(response.getBody(), TimerMetrics.TimerMetricsSerializeWrapper.class);
            }
            default:
                break;
        }

        throw new MQBrokerException(response.getCode(), response.getRemark(), addr);
    }

    public ConsumerOffsetSerializeWrapper getAllConsumerOffset(
        final String addr) throws InterruptedException, RemotingTimeoutException,
        RemotingSendRequestException, RemotingConnectException, MQBrokerException {
        RemotingCommand request = RemotingCommand.createRequestCommand(RequestCode.GET_ALL_CONSUMER_OFFSET, null);
        RemotingCommand response = this.remotingClient.invokeSync(addr, request, 3000);
        assert response != null;
        switch (response.getCode()) {
            case ResponseCode.SUCCESS: {
                return ConsumerOffsetSerializeWrapper.decode(response.getBody(), ConsumerOffsetSerializeWrapper.class);
            }
            default:
                break;
        }

        throw new MQBrokerException(response.getCode(), response.getRemark(), addr);
    }

    public String getAllDelayOffset(
        final String addr) throws InterruptedException, RemotingTimeoutException, RemotingSendRequestException,
        RemotingConnectException, MQBrokerException, UnsupportedEncodingException {
        RemotingCommand request = RemotingCommand.createRequestCommand(RequestCode.GET_ALL_DELAY_OFFSET, null);
        RemotingCommand response = this.remotingClient.invokeSync(addr, request, 3000);
        assert response != null;
        switch (response.getCode()) {
            case ResponseCode.SUCCESS: {
                return new String(response.getBody(), MixAll.DEFAULT_CHARSET);
            }
            default:
                break;
        }

        throw new MQBrokerException(response.getCode(), response.getRemark(), addr);
    }

    public SubscriptionGroupWrapper getAllSubscriptionGroupConfig(
        final String addr) throws InterruptedException, RemotingTimeoutException,
        RemotingSendRequestException, RemotingConnectException, MQBrokerException {
        RemotingCommand request = RemotingCommand.createRequestCommand(RequestCode.GET_ALL_SUBSCRIPTIONGROUP_CONFIG, null);
        RemotingCommand response = this.remotingClient.invokeSync(addr, request, 3000);
        assert response != null;
        switch (response.getCode()) {
            case ResponseCode.SUCCESS: {
                return SubscriptionGroupWrapper.decode(response.getBody(), SubscriptionGroupWrapper.class);
            }
            default:
                break;
        }

        throw new MQBrokerException(response.getCode(), response.getRemark(), addr);
    }

    public void registerRPCHook(RPCHook rpcHook) {
        remotingClient.registerRPCHook(rpcHook);
    }

    public void clearRPCHook() {
        remotingClient.clearRPCHook();
    }

    public long getMaxOffset(final String addr, final String topic, final int queueId, final boolean committed,
        final boolean isOnlyThisBroker)
        throws RemotingException, MQBrokerException, InterruptedException {
        GetMaxOffsetRequestHeader requestHeader = new GetMaxOffsetRequestHeader();
        requestHeader.setTopic(topic);
        requestHeader.setQueueId(queueId);
        requestHeader.setCommitted(committed);
        RemotingCommand request = RemotingCommand.createRequestCommand(RequestCode.GET_MAX_OFFSET, requestHeader);

        RemotingCommand response = this.remotingClient.invokeSync(addr, request, 3000);
        assert response != null;
        switch (response.getCode()) {
            case ResponseCode.SUCCESS: {
                GetMaxOffsetResponseHeader responseHeader = (GetMaxOffsetResponseHeader) response.decodeCommandCustomHeader(GetMaxOffsetResponseHeader.class);

                return responseHeader.getOffset();
            }
            default:
                break;
        }

        throw new MQBrokerException(response.getCode(), response.getRemark());
    }

    public long getMinOffset(final String addr, final String topic, final int queueId, final boolean isOnlyThisBroker)
        throws RemotingException, MQBrokerException, InterruptedException {
        GetMinOffsetRequestHeader requestHeader = new GetMinOffsetRequestHeader();
        requestHeader.setTopic(topic);
        requestHeader.setQueueId(queueId);
        RemotingCommand request = RemotingCommand.createRequestCommand(RequestCode.GET_MIN_OFFSET, requestHeader);

        RemotingCommand response = this.remotingClient.invokeSync(addr, request, 3000);
        assert response != null;
        switch (response.getCode()) {
            case ResponseCode.SUCCESS: {
                GetMinOffsetResponseHeader responseHeader = (GetMinOffsetResponseHeader) response.decodeCommandCustomHeader(GetMinOffsetResponseHeader.class);

                return responseHeader.getOffset();
            }
            default:
                break;
        }

        throw new MQBrokerException(response.getCode(), response.getRemark());
    }

    public void lockBatchMQAsync(
        final String addr,
        final LockBatchRequestBody requestBody,
        final long timeoutMillis,
        final LockCallback callback) throws RemotingException, InterruptedException {
        RemotingCommand request = RemotingCommand.createRequestCommand(RequestCode.LOCK_BATCH_MQ, null);

        request.setBody(requestBody.encode());
        this.remotingClient.invokeAsync(addr, request, timeoutMillis, responseFuture -> {
            if (callback == null) {
                return;
            }

            try {
                RemotingCommand response = responseFuture.getResponseCommand();
                if (response != null) {
                    if (response.getCode() == ResponseCode.SUCCESS) {
                        LockBatchResponseBody responseBody = LockBatchResponseBody.decode(response.getBody(),
                            LockBatchResponseBody.class);
                        Set<MessageQueue> messageQueues = responseBody.getLockOKMQSet();
                        callback.onSuccess(messageQueues);
                    } else {
                        callback.onException(new MQBrokerException(response.getCode(), response.getRemark()));
                    }
                }
            } catch (Throwable ignored) {

            }
        });
    }

    public void unlockBatchMQAsync(
        final String addr,
        final UnlockBatchRequestBody requestBody,
        final long timeoutMillis,
        final UnlockCallback callback) throws RemotingException, InterruptedException {
        RemotingCommand request = RemotingCommand.createRequestCommand(RequestCode.UNLOCK_BATCH_MQ, null);

        request.setBody(requestBody.encode());

        this.remotingClient.invokeAsync(addr, request, timeoutMillis, responseFuture -> {
            if (callback == null) {
                return;
            }

            try {
                RemotingCommand response = responseFuture.getResponseCommand();
                if (response != null) {
                    if (response.getCode() == ResponseCode.SUCCESS) {
                        callback.onSuccess();
                    } else {
                        callback.onException(new MQBrokerException(response.getCode(), response.getRemark()));
                    }
                }
            } catch (Throwable ignored) {

            }
        });
    }

    public RemotingClient getRemotingClient() {
        return this.remotingClient;
    }

    public SendResult sendMessageToSpecificBroker(String brokerAddr, final String brokerName,
        final MessageExt msg, String group,
        long timeoutMillis) throws RemotingException, MQBrokerException, InterruptedException {

        RemotingCommand request = buildSendMessageRequest(msg, group);
        RemotingCommand response = this.remotingClient.invokeSync(brokerAddr, request, timeoutMillis);
        return this.processSendResponse(brokerName, msg, response);
    }

    public CompletableFuture<SendResult> sendMessageToSpecificBrokerAsync(String brokerAddr, final String brokerName,
        final MessageExt msg, String group,
        long timeoutMillis) {
        RemotingCommand request = buildSendMessageRequest(msg, group);

        CompletableFuture<SendResult> cf = new CompletableFuture<>();
        final String msgId = msg.getMsgId();
        try {
            this.remotingClient.invokeAsync(brokerAddr, request, timeoutMillis, responseFuture -> {
                RemotingCommand response = responseFuture.getResponseCommand();
                if (null != response) {
                    SendResult sendResult = null;
                    try {
                        sendResult = this.processSendResponse(brokerName, msg, response);
                        cf.complete(sendResult);
                    } catch (MQBrokerException | RemotingCommandException e) {
                        LOGGER.error("processSendResponse in sendMessageToSpecificBrokerAsync failed, msgId=" + msgId, e);
                        cf.completeExceptionally(e);
                    }
                } else {
                    cf.complete(null);
                }

            });
        } catch (Throwable t) {
            LOGGER.error("invokeAsync failed in sendMessageToSpecificBrokerAsync, msgId=" + msgId, t);
            cf.completeExceptionally(t);
        }
        return cf;
    }

    private static RemotingCommand buildSendMessageRequest(MessageExt msg, String group) {
        SendMessageRequestHeaderV2 requestHeaderV2 = buildSendMessageRequestHeaderV2(msg, group);
        RemotingCommand request = RemotingCommand.createRequestCommand(RequestCode.SEND_MESSAGE_V2, requestHeaderV2);

        request.setBody(msg.getBody());
        return request;
    }

    private static SendMessageRequestHeaderV2 buildSendMessageRequestHeaderV2(MessageExt msg, String group) {
        SendMessageRequestHeader requestHeader = new SendMessageRequestHeader();
        requestHeader.setProducerGroup(group);
        requestHeader.setTopic(msg.getTopic());
        requestHeader.setDefaultTopic(TopicValidator.AUTO_CREATE_TOPIC_KEY_TOPIC);
        requestHeader.setDefaultTopicQueueNums(8);
        requestHeader.setQueueId(msg.getQueueId());
        requestHeader.setSysFlag(msg.getSysFlag());
        requestHeader.setBornTimestamp(msg.getBornTimestamp());
        requestHeader.setFlag(msg.getFlag());
        requestHeader.setProperties(MessageDecoder.messageProperties2String(msg.getProperties()));
        requestHeader.setReconsumeTimes(msg.getReconsumeTimes());
        requestHeader.setBatch(false);

        SendMessageRequestHeaderV2 requestHeaderV2 = SendMessageRequestHeaderV2.createSendMessageRequestHeaderV2(requestHeader);
        return requestHeaderV2;
    }

    private SendResult processSendResponse(
        final String brokerName,
        final Message msg,
        final RemotingCommand response
    ) throws MQBrokerException, RemotingCommandException {
        SendStatus sendStatus = null;
        switch (response.getCode()) {
            case ResponseCode.FLUSH_DISK_TIMEOUT:
                sendStatus = SendStatus.FLUSH_DISK_TIMEOUT;
                break;
            case ResponseCode.FLUSH_SLAVE_TIMEOUT:
                sendStatus = SendStatus.FLUSH_SLAVE_TIMEOUT;
                break;
            case ResponseCode.SLAVE_NOT_AVAILABLE:
                sendStatus = SendStatus.SLAVE_NOT_AVAILABLE;
                break;
            case ResponseCode.SUCCESS: {
                sendStatus = SendStatus.SEND_OK;
                break;
            }
            default:
                break;
        }
        if (sendStatus != null) {
            SendMessageResponseHeader responseHeader =
                    (SendMessageResponseHeader) response.decodeCommandCustomHeader(SendMessageResponseHeader.class);

            //If namespace not null , reset Topic without namespace.
            String topic = msg.getTopic();

            MessageQueue messageQueue = new MessageQueue(topic, brokerName, responseHeader.getQueueId());

            String uniqMsgId = MessageClientIDSetter.getUniqID(msg);
            if (msg instanceof MessageBatch) {
                StringBuilder sb = new StringBuilder();
                for (Message message : (MessageBatch) msg) {
                    sb.append(sb.length() == 0 ? "" : ",").append(MessageClientIDSetter.getUniqID(message));
                }
                uniqMsgId = sb.toString();
            }
            SendResult sendResult = new SendResult(sendStatus,
                    uniqMsgId,
                    responseHeader.getMsgId(), messageQueue, responseHeader.getQueueOffset());
            sendResult.setTransactionId(responseHeader.getTransactionId());
            String regionId = response.getExtFields().get(MessageConst.PROPERTY_MSG_REGION);
            String traceOn = response.getExtFields().get(MessageConst.PROPERTY_TRACE_SWITCH);
            if (regionId == null || regionId.isEmpty()) {
                regionId = MixAll.DEFAULT_TRACE_REGION_ID;
            }
            if (traceOn != null && traceOn.equals("false")) {
                sendResult.setTraceOn(false);
            } else {
                sendResult.setTraceOn(true);
            }
            sendResult.setRegionId(regionId);
            return sendResult;
        }

        throw new MQBrokerException(response.getCode(), response.getRemark());
    }

    public BrokerFixedThreadPoolExecutor getBrokerOuterExecutor() {
        return brokerOuterExecutor;
    }

    public TopicRouteData getTopicRouteInfoFromNameServer(final String topic, final long timeoutMillis)
        throws RemotingException, MQBrokerException, InterruptedException {
        return getTopicRouteInfoFromNameServer(topic, timeoutMillis, true);
    }

    public TopicRouteData getTopicRouteInfoFromNameServer(final String topic, final long timeoutMillis,
        boolean allowTopicNotExist) throws MQBrokerException, InterruptedException, RemotingTimeoutException, RemotingSendRequestException, RemotingConnectException {
        GetRouteInfoRequestHeader requestHeader = new GetRouteInfoRequestHeader();
        requestHeader.setTopic(topic);

        RemotingCommand request = RemotingCommand.createRequestCommand(RequestCode.GET_ROUTEINFO_BY_TOPIC, requestHeader);

        RemotingCommand response = this.remotingClient.invokeSync(null, request, timeoutMillis);
        assert response != null;
        switch (response.getCode()) {
            case ResponseCode.TOPIC_NOT_EXIST: {
                if (allowTopicNotExist) {
                    LOGGER.warn("get Topic [{}] RouteInfoFromNameServer is not exist value", topic);
                }

                break;
            }
            case ResponseCode.SUCCESS: {
                byte[] body = response.getBody();
                if (body != null) {
                    return TopicRouteData.decode(body, TopicRouteData.class);
                }
            }
            default:
                break;
        }

        throw new MQBrokerException(response.getCode(), response.getRemark());
    }

    public ClusterInfo getBrokerClusterInfo() throws InterruptedException, RemotingTimeoutException, RemotingSendRequestException, RemotingConnectException, MQBrokerException {
        RemotingCommand request = RemotingCommand.createRequestCommand(RequestCode.GET_BROKER_CLUSTER_INFO, null);
        RemotingCommand response = this.remotingClient.invokeSync(null, request, 3_000);
        assert response != null;
        switch (response.getCode()) {
            case ResponseCode.SUCCESS: {
                return ClusterInfo.decode(response.getBody(), ClusterInfo.class);
            }
            default:
                break;
        }

        throw new MQBrokerException(response.getCode(), response.getRemark());
    }

    public void forwardRequest(String brokerAddr, RemotingCommand request, long timeoutMillis,
        InvokeCallback invokeCallback) throws InterruptedException, RemotingSendRequestException, RemotingTimeoutException, RemotingTooMuchRequestException, RemotingConnectException {
        this.remotingClient.invokeAsync(brokerAddr, request, timeoutMillis, invokeCallback);
    }

    public void refreshMetadata() throws Exception {
        ClusterInfo brokerClusterInfo = getBrokerClusterInfo();
        clientMetadata.refreshClusterInfo(brokerClusterInfo);
    }

    public ClientMetadata getClientMetadata() {
        return clientMetadata;
    }

    public RpcClient getRpcClient() {
        return rpcClient;
    }

    public MessageRequestModeSerializeWrapper getAllMessageRequestMode(
        final String addr) throws RemotingSendRequestException, RemotingConnectException,
        MQBrokerException, RemotingTimeoutException, InterruptedException {
        RemotingCommand request = RemotingCommand.createRequestCommand(RequestCode.GET_ALL_MESSAGE_REQUEST_MODE, null);
        RemotingCommand response = this.remotingClient.invokeSync(addr, request, 3000);
        assert response != null;
        switch (response.getCode()) {
            case ResponseCode.SUCCESS: {
                return MessageRequestModeSerializeWrapper.decode(response.getBody(), MessageRequestModeSerializeWrapper.class);
            }
            default:
                break;
        }

        throw new MQBrokerException(response.getCode(), response.getRemark(), addr);
    }

    public GetMetaDataResponseHeader getControllerMetaData(final String controllerAddress) throws Exception {
        final RemotingCommand request = RemotingCommand.createRequestCommand(RequestCode.CONTROLLER_GET_METADATA_INFO, null);
        final RemotingCommand response = this.remotingClient.invokeSync(controllerAddress, request, 3000);
        assert response != null;
        if (response.getCode() == SUCCESS) {
            return (GetMetaDataResponseHeader) response.decodeCommandCustomHeader(GetMetaDataResponseHeader.class);
        }
        throw new MQBrokerException(response.getCode(), response.getRemark());
    }

    /**
     * Alter syncStateSet
     */
    public SyncStateSet alterSyncStateSet(
        final String controllerAddress,
        final String brokerName,
        final Long masterBrokerId, final int masterEpoch,
        final Set<Long> newSyncStateSet, final int syncStateSetEpoch) throws Exception {

        final AlterSyncStateSetRequestHeader requestHeader = new AlterSyncStateSetRequestHeader(brokerName, masterBrokerId, masterEpoch);
        final RemotingCommand request = RemotingCommand.createRequestCommand(RequestCode.CONTROLLER_ALTER_SYNC_STATE_SET, requestHeader);
        request.setBody(new SyncStateSet(newSyncStateSet, syncStateSetEpoch).encode());
        final RemotingCommand response = this.remotingClient.invokeSync(controllerAddress, request, 3000);
        assert response != null;
        switch (response.getCode()) {
            case SUCCESS: {
                assert response.getBody() != null;
                return RemotingSerializable.decode(response.getBody(), SyncStateSet.class);
            }
        }
        throw new MQBrokerException(response.getCode(), response.getRemark());
    }

    /**
     * Broker try to elect itself as a master in broker set
     */
    public Pair<ElectMasterResponseHeader, Set<Long>> brokerElect(String controllerAddress, String clusterName, String brokerName,
                                                 Long brokerId) throws Exception {

        final ElectMasterRequestHeader requestHeader = ElectMasterRequestHeader.ofBrokerTrigger(clusterName, brokerName, brokerId);
        RemotingCommand request = RemotingCommand.createRequestCommand(RequestCode.CONTROLLER_ELECT_MASTER, requestHeader);
        RemotingCommand response = this.remotingClient.invokeSync(controllerAddress, request, 3000);
        assert response != null;
        switch (response.getCode()) {
            // Only record success response.
            case CONTROLLER_MASTER_STILL_EXIST:
            case SUCCESS:
                final ElectMasterResponseHeader responseHeader = (ElectMasterResponseHeader) response.decodeCommandCustomHeader(ElectMasterResponseHeader.class);
                final ElectMasterResponseBody responseBody = RemotingSerializable.decode(response.getBody(), ElectMasterResponseBody.class);
                return new Pair<>(responseHeader, responseBody.getSyncStateSet());
        }

        throw new MQBrokerException(response.getCode(), response.getRemark());
    }

    public GetNextBrokerIdResponseHeader getNextBrokerId(final String clusterName, final String brokerName, final String controllerAddress) throws Exception {
        final GetNextBrokerIdRequestHeader requestHeader = new GetNextBrokerIdRequestHeader(clusterName, brokerName);
        final RemotingCommand request = RemotingCommand.createRequestCommand(RequestCode.CONTROLLER_GET_NEXT_BROKER_ID, requestHeader);
        final RemotingCommand response = this.remotingClient.invokeSync(controllerAddress, request, 3000);
        assert response != null;
        if (response.getCode() == SUCCESS) {
            return (GetNextBrokerIdResponseHeader) response.decodeCommandCustomHeader(GetNextBrokerIdResponseHeader.class);
        }
        throw new MQBrokerException(response.getCode(), response.getRemark());
    }

    public ApplyBrokerIdResponseHeader applyBrokerId(final String clusterName, final String brokerName, final Long brokerId, final String registerCheckCode, final String controllerAddress) throws Exception {
        final ApplyBrokerIdRequestHeader requestHeader = new ApplyBrokerIdRequestHeader(clusterName, brokerName, brokerId, registerCheckCode);
        final RemotingCommand request = RemotingCommand.createRequestCommand(RequestCode.CONTROLLER_APPLY_BROKER_ID, requestHeader);
        final RemotingCommand response = this.remotingClient.invokeSync(controllerAddress, request, 3000);
        assert response != null;
        if (response.getCode() == SUCCESS) {
            return (ApplyBrokerIdResponseHeader) response.decodeCommandCustomHeader(ApplyBrokerIdResponseHeader.class);
        }
        throw new MQBrokerException(response.getCode(), response.getRemark());
    }

    public Pair<RegisterBrokerToControllerResponseHeader, Set<Long>> registerBrokerToController(final String clusterName, final String brokerName, final Long brokerId, final String brokerAddress, final String controllerAddress) throws Exception {
        final RegisterBrokerToControllerRequestHeader requestHeader = new RegisterBrokerToControllerRequestHeader(clusterName, brokerName, brokerId, brokerAddress);
        final RemotingCommand request = RemotingCommand.createRequestCommand(RequestCode.CONTROLLER_REGISTER_BROKER, requestHeader);
        final RemotingCommand response = this.remotingClient.invokeSync(controllerAddress, request, 3000);
        assert response != null;
        if (response.getCode() == SUCCESS) {
            RegisterBrokerToControllerResponseHeader responseHeader = (RegisterBrokerToControllerResponseHeader) response.decodeCommandCustomHeader(RegisterBrokerToControllerResponseHeader.class);
            Set<Long> syncStateSet = RemotingSerializable.decode(response.getBody(), SyncStateSet.class).getSyncStateSet();
            return new Pair<>(responseHeader, syncStateSet);
        }
        throw new MQBrokerException(response.getCode(), response.getRemark());
    }

    /**
     * Get broker replica info
     */
    public Pair<GetReplicaInfoResponseHeader, SyncStateSet> getReplicaInfo(final String controllerAddress,
        final String brokerName) throws Exception {
        final GetReplicaInfoRequestHeader requestHeader = new GetReplicaInfoRequestHeader(brokerName);
        final RemotingCommand request = RemotingCommand.createRequestCommand(RequestCode.CONTROLLER_GET_REPLICA_INFO, requestHeader);
        final RemotingCommand response = this.remotingClient.invokeSync(controllerAddress, request, 3000);
        assert response != null;
        switch (response.getCode()) {
            case SUCCESS: {
                final GetReplicaInfoResponseHeader header = (GetReplicaInfoResponseHeader) response.decodeCommandCustomHeader(GetReplicaInfoResponseHeader.class);
                assert response.getBody() != null;
                final SyncStateSet stateSet = RemotingSerializable.decode(response.getBody(), SyncStateSet.class);
                return new Pair<>(header, stateSet);
            }
        }
        throw new MQBrokerException(response.getCode(), response.getRemark());
    }

    /**
     * Send heartbeat to controller
     */
    public void sendHeartbeatToController(final String controllerAddress,
        final String clusterName,
        final String brokerAddr,
        final String brokerName,
        final Long brokerId,
        final int sendHeartBeatTimeoutMills,
        final boolean isInBrokerContainer,
        final int epoch,
        final long maxOffset,
        final long confirmOffset,
        final long controllerHeartBeatTimeoutMills,
        final int electionPriority) {
        if (StringUtils.isEmpty(controllerAddress)) {
            return;
        }

        final BrokerHeartbeatRequestHeader requestHeader = new BrokerHeartbeatRequestHeader();
        requestHeader.setClusterName(clusterName);
        requestHeader.setBrokerAddr(brokerAddr);
        requestHeader.setBrokerName(brokerName);
        requestHeader.setEpoch(epoch);
        requestHeader.setMaxOffset(maxOffset);
        requestHeader.setConfirmOffset(confirmOffset);
        requestHeader.setHeartbeatTimeoutMills(controllerHeartBeatTimeoutMills);
        requestHeader.setElectionPriority(electionPriority);
        requestHeader.setBrokerId(brokerId);
        brokerOuterExecutor.execute(new AbstractBrokerRunnable(new BrokerIdentity(clusterName, brokerName, brokerId, isInBrokerContainer)) {
            @Override
            public void run0() {
                RemotingCommand request = RemotingCommand.createRequestCommand(RequestCode.BROKER_HEARTBEAT, requestHeader);

                try {
                    BrokerOuterAPI.this.remotingClient.invokeOneway(controllerAddress, request, sendHeartBeatTimeoutMills);
                } catch (Exception e) {
                    LOGGER.error("Error happen when send heartbeat to controller {}", controllerAddress, e);
                }
            }
        });
    }

    public CompletableFuture<PullResult> pullMessageFromSpecificBrokerAsync(String brokerName, String brokerAddr,
        String consumerGroup, String topic, int queueId, long offset,
        int maxNums, long timeoutMillis) throws RemotingException, InterruptedException {
        PullMessageRequestHeader requestHeader = new PullMessageRequestHeader();
        requestHeader.setConsumerGroup(consumerGroup);
        requestHeader.setTopic(topic);
        requestHeader.setQueueId(queueId);
        requestHeader.setQueueOffset(offset);
        requestHeader.setMaxMsgNums(maxNums);
        requestHeader.setSysFlag(PullSysFlag.buildSysFlag(false, false, true, false));
        requestHeader.setCommitOffset(0L);
        requestHeader.setSuspendTimeoutMillis(0L);
        requestHeader.setSubscription(SubscriptionData.SUB_ALL);
        requestHeader.setSubVersion(System.currentTimeMillis());
        requestHeader.setMaxMsgBytes(Integer.MAX_VALUE);
        requestHeader.setExpressionType(ExpressionType.TAG);
        requestHeader.setBname(brokerName);

        RemotingCommand request = RemotingCommand.createRequestCommand(RequestCode.PULL_MESSAGE, requestHeader);
        CompletableFuture<PullResult> pullResultFuture = new CompletableFuture<>();
        this.remotingClient.invokeAsync(brokerAddr, request, timeoutMillis, responseFuture -> {
            if (responseFuture.getCause() != null) {
                pullResultFuture.complete(new PullResult(PullStatus.NO_MATCHED_MSG, -1, -1, -1, new ArrayList<>()));
                return;
            }
            try {
                PullResultExt pullResultExt = this.processPullResponse(responseFuture.getResponseCommand(), brokerAddr);
                this.processPullResult(pullResultExt, brokerName, queueId);
                pullResultFuture.complete(pullResultExt);
            } catch (Exception e) {
                pullResultFuture.complete(new PullResult(PullStatus.NO_MATCHED_MSG, -1, -1, -1, new ArrayList<>()));
            }
        });
        return pullResultFuture;
    }

    private PullResultExt processPullResponse(
        final RemotingCommand response,
        final String addr) throws MQBrokerException, RemotingCommandException {
        PullStatus pullStatus = PullStatus.NO_NEW_MSG;
        switch (response.getCode()) {
            case ResponseCode.SUCCESS:
                pullStatus = PullStatus.FOUND;
                break;
            case ResponseCode.PULL_NOT_FOUND:
                pullStatus = PullStatus.NO_NEW_MSG;
                break;
            case ResponseCode.PULL_RETRY_IMMEDIATELY:
                pullStatus = PullStatus.NO_MATCHED_MSG;
                break;
            case ResponseCode.PULL_OFFSET_MOVED:
                pullStatus = PullStatus.OFFSET_ILLEGAL;
                break;

            default:
                throw new MQBrokerException(response.getCode(), response.getRemark(), addr);
        }

        PullMessageResponseHeader responseHeader =
            (PullMessageResponseHeader) response.decodeCommandCustomHeader(PullMessageResponseHeader.class);

        return new PullResultExt(pullStatus, responseHeader.getNextBeginOffset(), responseHeader.getMinOffset(),
            responseHeader.getMaxOffset(), null, responseHeader.getSuggestWhichBrokerId(), response.getBody(), responseHeader.getOffsetDelta());

    }

    private PullResult processPullResult(final PullResultExt pullResult, String brokerName, int queueId) {

        if (PullStatus.FOUND == pullResult.getPullStatus()) {
            ByteBuffer byteBuffer = ByteBuffer.wrap(pullResult.getMessageBinary());
            List<MessageExt> msgList = MessageDecoder.decodesBatch(
                byteBuffer,
                true,
                true,
                true
            );

            // Currently batch messages are not supported
            for (MessageExt msg : msgList) {
                String traFlag = msg.getProperty(MessageConst.PROPERTY_TRANSACTION_PREPARED);
                if (Boolean.parseBoolean(traFlag)) {
                    msg.setTransactionId(msg.getProperty(MessageConst.PROPERTY_UNIQ_CLIENT_MESSAGE_ID_KEYIDX));
                }
                MessageAccessor.putProperty(msg, MessageConst.PROPERTY_MIN_OFFSET,
                    Long.toString(pullResult.getMinOffset()));
                MessageAccessor.putProperty(msg, MessageConst.PROPERTY_MAX_OFFSET,
                    Long.toString(pullResult.getMaxOffset()));
                msg.setBrokerName(brokerName);
                msg.setQueueId(queueId);
                if (pullResult.getOffsetDelta() != null) {
                    msg.setQueueOffset(pullResult.getOffsetDelta() + msg.getQueueOffset());
                }
            }

            pullResult.setMsgFoundList(msgList);
        }

        pullResult.setMessageBinary(null);

        return pullResult;
    }

}
