/**
 * Validate message
 *
 * @param msg
 * @param defaultMQProducer
 * @throws com.alibaba.rocketmq.client.exception.MQClientException
 */
public static void checkMessage(Message msg, DefaultMQProducer defaultMQProducer)
        throws MQClientException {
    if (null == msg) {
        throw new MQClientException(ResponseCode.MESSAGE_ILLEGAL, "the message is null");
    }
    // topic
    Validators.checkTopic(msg.getTopic());
    // body
    if (null == msg.getBody()) {
        throw new MQClientException(ResponseCode.MESSAGE_ILLEGAL, "the message body is null");
    }

    if (0 == msg.getBody().length) {
        throw new MQClientException(ResponseCode.MESSAGE_ILLEGAL, "the message body length is zero");
    }

    if (msg.getBody().length > defaultMQProducer.getMaxMessageSize()) {
        throw new MQClientException(ResponseCode.MESSAGE_ILLEGAL,
                "the message body size over max value, MAX: " + defaultMQProducer.getMaxMessageSize());
    }
}
 

private RemotingCommand consumeMessageDirectly(ChannelHandlerContext ctx, RemotingCommand request) throws RemotingCommandException {
    final RemotingCommand response = RemotingCommand.createResponseCommand(null);
    final ConsumeMessageDirectlyResultRequestHeader requestHeader =
            (ConsumeMessageDirectlyResultRequestHeader) request
                .decodeCommandCustomHeader(ConsumeMessageDirectlyResultRequestHeader.class);

    final MessageExt msg = MessageDecoder.decode(ByteBuffer.wrap(request.getBody()));

    ConsumeMessageDirectlyResult result =
            this.mqClientFactory.consumeMessageDirectly(msg, requestHeader.getConsumerGroup(), requestHeader.getBrokerName());

    if (null != result) {
        response.setCode(ResponseCode.SUCCESS);
        response.setBody(result.encode());
    }
    else {
        response.setCode(ResponseCode.SYSTEM_ERROR);
        response.setRemark(String.format("The Consumer Group <%s> not exist in this consumer", requestHeader.getConsumerGroup()));
    }

    return response;
}
 

private RemotingCommand getConsumerRunningInfo(ChannelHandlerContext ctx, RemotingCommand request) throws RemotingCommandException {
    final RemotingCommand response = RemotingCommand.createResponseCommand(null);
    final GetConsumerRunningInfoRequestHeader requestHeader =
            (GetConsumerRunningInfoRequestHeader) request.decodeCommandCustomHeader(GetConsumerRunningInfoRequestHeader.class);

    ConsumerRunningInfo consumerRunningInfo = this.mqClientFactory.consumerRunningInfo(requestHeader.getConsumerGroup());
    if (null != consumerRunningInfo) {
        if (requestHeader.isJstackEnable()) {
            Map<Thread, StackTraceElement[]> map = Thread.getAllStackTraces();
            consumerRunningInfo.setStackTraceElementMap(map);
            String jstack = UtilAll.jstack(map);
            consumerRunningInfo.setJstack(jstack);
        }

        response.setCode(ResponseCode.SUCCESS);
        response.setBody(consumerRunningInfo.encode());
    }
    else {
        response.setCode(ResponseCode.SYSTEM_ERROR);
        response.setRemark(String.format("The Consumer Group <%s> not exist in this consumer", requestHeader.getConsumerGroup()));
    }

    return response;
}
 

private RemotingCommand lockBatchMQ(ChannelHandlerContext ctx, RemotingCommand request)
        throws RemotingCommandException {
    final RemotingCommand response = RemotingCommand.createResponseCommand(null);
    LockBatchRequestBody requestBody =
            LockBatchRequestBody.decode(request.getBody(), LockBatchRequestBody.class);

    Set<MessageQueue> lockOKMQSet = this.brokerController.getRebalanceLockManager().tryLockBatch(//
        requestBody.getConsumerGroup(), //
        requestBody.getMqSet(), //
        requestBody.getClientId());

    LockBatchResponseBody responseBody = new LockBatchResponseBody();
    responseBody.setLockOKMQSet(lockOKMQSet);

    response.setBody(responseBody.encode());
    response.setCode(ResponseCode.SUCCESS);
    response.setRemark(null);
    return response;
}
 

private RemotingCommand getAllSubscriptionGroup(ChannelHandlerContext ctx, RemotingCommand request) throws RemotingCommandException {
    final RemotingCommand response = RemotingCommand.createResponseCommand(null);
    String content = this.brokerController.getSubscriptionGroupManager().encode();
    if (content != null && content.length() > 0) {
        try {
            response.setBody(content.getBytes(MixAll.DEFAULT_CHARSET));
        } catch (UnsupportedEncodingException e) {
            log.error("", e);

            response.setCode(ResponseCode.SYSTEM_ERROR);
            response.setRemark("UnsupportedEncodingException " + e);
            return response;
        }
    } else {
        log.error("No subscription group in this broker, client: " + ctx.channel().remoteAddress());
        response.setCode(ResponseCode.SYSTEM_ERROR);
        response.setRemark("No subscription group in this broker");
        return response;
    }

    response.setCode(ResponseCode.SUCCESS);
    response.setRemark(null);

    return response;
}
 

public ConsumeStats getConsumeStats(final String addr, final String consumerGroup, final String topic, final long timeoutMillis)
        throws InterruptedException, RemotingTimeoutException, RemotingSendRequestException, RemotingConnectException,
        MQBrokerException {
    GetConsumeStatsRequestHeader requestHeader = new GetConsumeStatsRequestHeader();
    requestHeader.setConsumerGroup(consumerGroup);
    requestHeader.setTopic(topic);

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

    RemotingCommand response = this.remotingClient.invokeSync(addr, request, timeoutMillis);
    switch (response.getCode()) {
    case ResponseCode.SUCCESS: {
        ConsumeStats consumeStats = ConsumeStats.decode(response.getBody(), ConsumeStats.class);
        return consumeStats;
    }
    default:
        break;
    }

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

public List<QueueTimeSpan> queryConsumeTimeSpan(final String addr, final String topic, final String group, final long timeoutMillis)
        throws RemotingConnectException, RemotingSendRequestException, RemotingTimeoutException, InterruptedException,
        MQBrokerException {
    QueryConsumeTimeSpanRequestHeader requestHeader = new QueryConsumeTimeSpanRequestHeader();
    requestHeader.setTopic(topic);
    requestHeader.setGroup(group);

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

    RemotingCommand response = this.remotingClient.invokeSync(addr, request, timeoutMillis);
    switch (response.getCode()) {
    case ResponseCode.SUCCESS: {
        QueryConsumeTimeSpanBody consumeTimeSpanBody = GroupList.decode(response.getBody(), QueryConsumeTimeSpanBody.class);
        return consumeTimeSpanBody.getConsumeTimeSpanSet();
    }
    default:
        break;
    }

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

@Override
public ConsumeStats examineConsumeStats(String consumerGroup, String topic) throws RemotingException, MQClientException,
        InterruptedException, MQBrokerException {
    String retryTopic = MixAll.getRetryTopic(consumerGroup);
    TopicRouteData topicRouteData = this.examineTopicRouteInfo(retryTopic);
    ConsumeStats result = new ConsumeStats();

    for (BrokerData bd : topicRouteData.getBrokerDatas()) {
        String addr = bd.selectBrokerAddr();
        if (addr != null) {
            ConsumeStats consumeStats =
                    this.mqClientInstance.getMQClientAPIImpl().getConsumeStats(addr, consumerGroup, topic, timeoutMillis * 3);
            result.getOffsetTable().putAll(consumeStats.getOffsetTable());
            double value = result.getConsumeTps() + consumeStats.getConsumeTps();
            result.setConsumeTps(value);
        }
    }

    if (result.getOffsetTable().isEmpty()) {
        throw new MQClientException(ResponseCode.CONSUMER_NOT_ONLINE,
                "Not found the consumer group consume stats, because return offset table is empty, maybe the consumer not consume any message");
    }

    return result;
}
 

/**
 * 根据 topic 和 group 获取消息的时间跨度
 * 
 * @param addr
 * @param topic
 * @param group
 * @param timeoutMillis
 * @return
 * @throws RemotingConnectException
 * @throws RemotingSendRequestException
 * @throws RemotingTimeoutException
 * @throws InterruptedException
 * @throws MQBrokerException
 */
public Set<QueueTimeSpan> queryConsumeTimeSpan(final String addr, final String topic, final String group,
        final long timeoutMillis) throws RemotingConnectException, RemotingSendRequestException,
                RemotingTimeoutException, InterruptedException, MQBrokerException {
    QueryConsumeTimeSpanRequestHeader requestHeader = new QueryConsumeTimeSpanRequestHeader();
    requestHeader.setTopic(topic);
    requestHeader.setGroup(group);

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

    RemotingCommand response = this.remotingClient.invokeSync(addr, request, timeoutMillis);
    switch (response.getCode()) {
    case ResponseCode.SUCCESS: {
        QueryConsumeTimeSpanBody consumeTimeSpanBody =
                GroupList.decode(response.getBody(), QueryConsumeTimeSpanBody.class);
        return consumeTimeSpanBody.getConsumeTimeSpanSet();
    }
    default:
        break;
    }

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

public RemotingCommand putKVConfig(ChannelHandlerContext ctx, RemotingCommand request)
        throws RemotingCommandException {
    final RemotingCommand response = RemotingCommand.createResponseCommand(null);
    final PutKVConfigRequestHeader requestHeader =
            (PutKVConfigRequestHeader) request.decodeCommandCustomHeader(PutKVConfigRequestHeader.class);

    this.namesrvController.getKvConfigManager().putKVConfig(//
        requestHeader.getNamespace(), //
        requestHeader.getKey(), //
        requestHeader.getValue()//
    );

    response.setCode(ResponseCode.SUCCESS);
    response.setRemark(null);
    return response;
}
 

private RemotingCommand updateAndCreateSubscriptionGroup(ChannelHandlerContext ctx,
        RemotingCommand request) throws RemotingCommandException {
    final RemotingCommand response = RemotingCommand.createResponseCommand(null);

    log.info("updateAndCreateSubscriptionGroup called by {}",
        RemotingHelper.parseChannelRemoteAddr(ctx.channel()));

    SubscriptionGroupConfig config =
            RemotingSerializable.decode(request.getBody(), SubscriptionGroupConfig.class);
    if (config != null) {
        this.brokerController.getSubscriptionGroupManager().updateSubscriptionGroupConfig(config);
    }

    response.setCode(ResponseCode.SUCCESS);
    response.setRemark(null);
    return response;
}
 

/**
 * 获取Broker运行时信息
 * 
 * @param addr
 * @param timeoutMillis
 * @return
 * @throws RemotingConnectException
 * @throws RemotingSendRequestException
 * @throws RemotingTimeoutException
 * @throws InterruptedException
 * @throws MQBrokerException
 */
public KVTable getBrokerRuntimeInfo(final String addr, final long timeoutMillis)
        throws RemotingConnectException, RemotingSendRequestException, RemotingTimeoutException,
        InterruptedException, MQBrokerException {

    RemotingCommand request =
            RemotingCommand.createRequestCommand(RequestCode.GET_BROKER_RUNTIME_INFO, null);

    RemotingCommand response = this.remotingClient.invokeSync(addr, request, timeoutMillis);
    switch (response.getCode()) {
    case ResponseCode.SUCCESS: {
        return KVTable.decode(response.getBody(), KVTable.class);
    }
    default:
        break;
    }

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

public GroupList queryTopicConsumeByWho(final String addr, final String topic, final long timeoutMillis)
        throws RemotingConnectException, RemotingSendRequestException, RemotingTimeoutException, InterruptedException,
        MQBrokerException {
    QueryTopicConsumeByWhoRequestHeader requestHeader = new QueryTopicConsumeByWhoRequestHeader();
    requestHeader.setTopic(topic);

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

    RemotingCommand response = this.remotingClient.invokeSync(MixAll.brokerVIPChannel(this.clientConfig.isVipChannelEnabled(), addr),
            request, timeoutMillis);
    switch (response.getCode()) {
        case ResponseCode.SUCCESS: {
            GroupList groupList = GroupList.decode(response.getBody(), GroupList.class);
            return groupList;
        }
        default:
            break;
    }

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

@Override
public ConsumerConnection examineConsumerConnectionInfo(String consumerGroup) throws InterruptedException, MQBrokerException,
        RemotingException, MQClientException {
    String topic = MixAll.getRetryTopic(consumerGroup);
    TopicRouteData topicRouteData = this.examineTopicRouteInfo(topic);
    ConsumerConnection result = new ConsumerConnection();

    for (BrokerData bd : topicRouteData.getBrokerDatas()) {
        String addr = bd.selectBrokerAddr();
        if (addr != null) {
            return this.mqClientInstance.getMQClientAPIImpl().getConsumerConnectionList(addr, consumerGroup, timeoutMillis);
        }
    }

    if (result.getConnectionSet().isEmpty()) {
        throw new MQClientException(ResponseCode.CONSUMER_NOT_ONLINE, "Not found the consumer group connection");
    }

    return result;
}
 

public RemotingCommand getKVConfig(ChannelHandlerContext ctx, RemotingCommand request) throws RemotingCommandException {
    final RemotingCommand response = RemotingCommand.createResponseCommand(GetKVConfigResponseHeader.class);
    final GetKVConfigResponseHeader responseHeader = (GetKVConfigResponseHeader) response.readCustomHeader();
    final GetKVConfigRequestHeader requestHeader =
            (GetKVConfigRequestHeader) request.decodeCommandCustomHeader(GetKVConfigRequestHeader.class);

    String value = this.namesrvController.getKvConfigManager().getKVConfig(//
            requestHeader.getNamespace(),//
            requestHeader.getKey()//
    );

    if (value != null) {
        responseHeader.setValue(value);
        response.setCode(ResponseCode.SUCCESS);
        response.setRemark(null);
        return response;
    }

    response.setCode(ResponseCode.QUERY_NOT_FOUND);
    response.setRemark("No config item, Namespace: " + requestHeader.getNamespace() + " Key: " + requestHeader.getKey());
    return response;
}
 

protected RemotingCommand msgContentCheck(final ChannelHandlerContext ctx,
                                          final SendMessageRequestHeader requestHeader, RemotingCommand request,
                                          final RemotingCommand response) {
    if (requestHeader.getTopic().length() > Byte.MAX_VALUE) {
        log.warn("putMessage message topic length too long " + requestHeader.getTopic().length());
        response.setCode(ResponseCode.MESSAGE_ILLEGAL);
        return response;
    }
    if (requestHeader.getProperties() != null && requestHeader.getProperties().length() > Short.MAX_VALUE) {
        log.warn("putMessage message properties length too long "
                + requestHeader.getProperties().length());
        response.setCode(ResponseCode.MESSAGE_ILLEGAL);
        return response;
    }
    if (request.getBody().length > DBMsgConstants.maxBodySize) {
        log.warn(" topic {}  msg body size {}  from {}", requestHeader.getTopic(),
                request.getBody().length, ChannelUtil.getRemoteIp(ctx.channel()));
        response.setRemark("msg body must be less 64KB");
        response.setCode(ResponseCode.MESSAGE_ILLEGAL);
        return response;
    }
    return response;
}
 

private RemotingCommand lockBatchMQ(ChannelHandlerContext ctx, RemotingCommand request) throws RemotingCommandException {
    final RemotingCommand response = RemotingCommand.createResponseCommand(null);
    LockBatchRequestBody requestBody = LockBatchRequestBody.decode(request.getBody(), LockBatchRequestBody.class);

    Set<MessageQueue> lockOKMQSet = this.brokerController.getRebalanceLockManager().tryLockBatch(//
        requestBody.getConsumerGroup(),//
        requestBody.getMqSet(),//
        requestBody.getClientId());

    LockBatchResponseBody responseBody = new LockBatchResponseBody();
    responseBody.setLockOKMQSet(lockOKMQSet);

    response.setBody(responseBody.encode());
    response.setCode(ResponseCode.SUCCESS);
    response.setRemark(null);
    return response;
}
 

public TopicStatsTable getTopicStatsInfo(final String addr, final String topic, final long timeoutMillis) throws InterruptedException,
        RemotingTimeoutException, RemotingSendRequestException, RemotingConnectException, MQBrokerException {
    GetTopicStatsInfoRequestHeader requestHeader = new GetTopicStatsInfoRequestHeader();
    requestHeader.setTopic(topic);

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

    RemotingCommand response = this.remotingClient.invokeSync(MixAll.brokerVIPChannel(this.clientConfig.isVipChannelEnabled(), addr),
            request, timeoutMillis);
    switch (response.getCode()) {
        case ResponseCode.SUCCESS: {
            TopicStatsTable topicStatsTable = TopicStatsTable.decode(response.getBody(), TopicStatsTable.class);
            return topicStatsTable;
        }
        default:
            break;
    }

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

public ConsumeStats getConsumeStats(final String addr, final String consumerGroup, final String topic, final long timeoutMillis)
        throws InterruptedException, RemotingTimeoutException, RemotingSendRequestException, RemotingConnectException,
        MQBrokerException {
    GetConsumeStatsRequestHeader requestHeader = new GetConsumeStatsRequestHeader();
    requestHeader.setConsumerGroup(consumerGroup);
    requestHeader.setTopic(topic);

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

    RemotingCommand response = this.remotingClient.invokeSync(MixAll.brokerVIPChannel(this.clientConfig.isVipChannelEnabled(), addr),
            request, timeoutMillis);
    switch (response.getCode()) {
        case ResponseCode.SUCCESS: {
            ConsumeStats consumeStats = ConsumeStats.decode(response.getBody(), ConsumeStats.class);
            return consumeStats;
        }
        default:
            break;
    }

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

private RemotingCommand searchOffsetByTimestamp(ChannelHandlerContext ctx, RemotingCommand request) throws RemotingCommandException {
    final RemotingCommand response = RemotingCommand.createResponseCommand(SearchOffsetResponseHeader.class);
    final SearchOffsetResponseHeader responseHeader = (SearchOffsetResponseHeader) response.readCustomHeader();
    final SearchOffsetRequestHeader requestHeader =
            (SearchOffsetRequestHeader) request.decodeCommandCustomHeader(SearchOffsetRequestHeader.class);

    long offset =
            this.brokerController.getMessageStore().getOffsetInQueueByTime(requestHeader.getTopic(), requestHeader.getQueueId(),
                requestHeader.getTimestamp());

    responseHeader.setOffset(offset);

    response.setCode(ResponseCode.SUCCESS);
    response.setRemark(null);
    return response;
}
 

private RemotingCommand getConsumerRunningInfo(ChannelHandlerContext ctx, RemotingCommand request)
        throws RemotingCommandException {
    final RemotingCommand response = RemotingCommand.createResponseCommand(null);
    final GetConsumerRunningInfoRequestHeader requestHeader =
            (GetConsumerRunningInfoRequestHeader) request
                .decodeCommandCustomHeader(GetConsumerRunningInfoRequestHeader.class);

    ConsumerRunningInfo consumerRunningInfo =
            this.mqClientFactory.consumerRunningInfo(requestHeader.getConsumerGroup());
    if (null != consumerRunningInfo) {
        if (requestHeader.isJstackEnable()) {
            String jstack = UtilAll.jstack();
            consumerRunningInfo.setJstack(jstack);
        }

        response.setCode(ResponseCode.SUCCESS);
        response.setBody(consumerRunningInfo.encode());
    }
    else {
        response.setCode(ResponseCode.SYSTEM_ERROR);
        response.setRemark(String.format("The Consumer Group <%s> not exist in this consumer",
            requestHeader.getConsumerGroup()));
    }

    return response;
}
 

public void unlockBatchMQ(//
                          final String addr, //
                          final UnlockBatchRequestBody requestBody, //
                          final long timeoutMillis, //
                          final boolean oneway//
) throws RemotingException, MQBrokerException, InterruptedException {
    RemotingCommand request = RemotingCommand.createRequestCommand(RequestCode.UNLOCK_BATCH_MQ, null);

    request.setBody(requestBody.encode());

    if (oneway) {
        this.remotingClient.invokeOneway(addr, request, timeoutMillis);
    } else {
        RemotingCommand response = this.remotingClient
                .invokeSync(MixAll.brokerVIPChannel(this.clientConfig.isVipChannelEnabled(), addr), request, timeoutMillis);
        switch (response.getCode()) {
            case ResponseCode.SUCCESS: {
                return;
            }
            default:
                break;
        }

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

public RemotingCommand getKVConfigByValue(ChannelHandlerContext ctx, RemotingCommand request)
        throws RemotingCommandException {
    final RemotingCommand response =
            RemotingCommand.createResponseCommand(GetKVConfigResponseHeader.class);
    final GetKVConfigResponseHeader responseHeader =
            (GetKVConfigResponseHeader) response.readCustomHeader();
    final GetKVConfigRequestHeader requestHeader =
            (GetKVConfigRequestHeader) request.decodeCommandCustomHeader(GetKVConfigRequestHeader.class);

    String value = this.namesrvController.getKvConfigManager().getKVConfigByValue(//
        requestHeader.getNamespace(), //
        requestHeader.getKey()//
    );

    if (value != null) {
        responseHeader.setValue(value);
        response.setCode(ResponseCode.SUCCESS);
        response.setRemark(null);
        return response;
    }

    response.setCode(ResponseCode.QUERY_NOT_FOUND);
    response.setRemark(
        "No config item, Namespace: " + requestHeader.getNamespace() + " Key: " + requestHeader.getKey());
    return response;
}
 

private RemotingCommand queryTopicConsumeByWho(ChannelHandlerContext ctx, RemotingCommand request) throws RemotingCommandException {
    final RemotingCommand response = RemotingCommand.createResponseCommand(null);
    QueryTopicConsumeByWhoRequestHeader requestHeader =
            (QueryTopicConsumeByWhoRequestHeader) request.decodeCommandCustomHeader(QueryTopicConsumeByWhoRequestHeader.class);

    //获取topic对应的消费者分组信息
    HashSet<String> groups = this.brokerController.getConsumerManager().queryTopicConsumeByWho(requestHeader.getTopic());
    //获取topic对应的offset信息
    Set<String> groupInOffset = this.brokerController.getConsumerOffsetManager().whichGroupByTopic(requestHeader.getTopic());
    if (groupInOffset != null && !groupInOffset.isEmpty()) {
        groups.addAll(groupInOffset); //把topic对应的消费者分组信息和topic对应的offset信息全部存入groups中
    }

    GroupList groupList = new GroupList();
    groupList.setGroupList(groups);
    byte[] body = groupList.encode();

    response.setBody(body);
    response.setCode(ResponseCode.SUCCESS);
    response.setRemark(null);
    return response;
}
 

private RemotingCommand queryCorrectionOffset(ChannelHandlerContext ctx, RemotingCommand request) throws RemotingCommandException {
    final RemotingCommand response = RemotingCommand.createResponseCommand(null);
    QueryCorrectionOffsetHeader requestHeader =
            (QueryCorrectionOffsetHeader) request.decodeCommandCustomHeader(QueryCorrectionOffsetHeader.class);

    Map<Integer, Long> correctionOffset =
            this.brokerController.getConsumerOffsetManager().queryMinOffsetInAllGroup(requestHeader.getTopic(),
                requestHeader.getFilterGroups());

    Map<Integer, Long> compareOffset =
            this.brokerController.getConsumerOffsetManager().queryOffset(requestHeader.getTopic(), requestHeader.getCompareGroup());

    if (compareOffset != null && !compareOffset.isEmpty()) {
        for (Integer queueId : compareOffset.keySet()) {
            correctionOffset.put(queueId, correctionOffset.get(queueId) > compareOffset.get(queueId) ? Long.MAX_VALUE
                    : correctionOffset.get(queueId));
        }
    }

    QueryCorrectionOffsetBody body = new QueryCorrectionOffsetBody();
    body.setCorrectionOffsets(correctionOffset);
    response.setBody(body.encode());
    response.setCode(ResponseCode.SUCCESS);
    response.setRemark(null);
    return response;
}
 

private RemotingCommand deleteSubscriptionGroup(ChannelHandlerContext ctx, RemotingCommand request)
        throws RemotingCommandException {
    final RemotingCommand response = RemotingCommand.createResponseCommand(null);
    DeleteSubscriptionGroupRequestHeader requestHeader = (DeleteSubscriptionGroupRequestHeader) request
        .decodeCommandCustomHeader(DeleteSubscriptionGroupRequestHeader.class);

    log.info("deleteSubscriptionGroup called by {}",
        RemotingHelper.parseChannelRemoteAddr(ctx.channel()));

    this.brokerController.getSubscriptionGroupManager()
        .deleteSubscriptionGroupConfig(requestHeader.getGroupName());

    response.setCode(ResponseCode.SUCCESS);
    response.setRemark(null);
    return response;
}
 

private RemotingCommand getMinOffset(ChannelHandlerContext ctx, RemotingCommand request)
        throws RemotingCommandException {
    final RemotingCommand response =
            RemotingCommand.createResponseCommand(GetMinOffsetResponseHeader.class);
    final GetMinOffsetResponseHeader responseHeader =
            (GetMinOffsetResponseHeader) response.readCustomHeader();
    final GetMinOffsetRequestHeader requestHeader = (GetMinOffsetRequestHeader) request
        .decodeCommandCustomHeader(GetMinOffsetRequestHeader.class);

    long offset = this.brokerController.getMessageStore().getMinOffsetInQuque(requestHeader.getTopic(),
        requestHeader.getQueueId());

    responseHeader.setOffset(offset);
    response.setCode(ResponseCode.SUCCESS);
    response.setRemark(null);
    return response;
}
 

@Override
public TopicConfig examineTopicConfig(String addr, String topic) {
    RemotingClient remotingClient = MQAdminInstance.threadLocalRemotingClient();
    RemotingCommand request = RemotingCommand.createRequestCommand(RequestCode.GET_ALL_TOPIC_CONFIG, null);
    RemotingCommand response = null;
    try {
        response = remotingClient.invokeSync(addr, request, 3000);
    } catch (Exception err) {
        throw Throwables.propagate(err);
    }
    switch (response.getCode()) {
        case ResponseCode.SUCCESS: {
            TopicConfigSerializeWrapper topicConfigSerializeWrapper = decode(response.getBody(), TopicConfigSerializeWrapper.class);
            return topicConfigSerializeWrapper.getTopicConfigTable().get(topic);
        }
        default:
            throw Throwables.propagate(new MQBrokerException(response.getCode(), response.getRemark()));
    }
}
 

/**
 * Validate message
 *
 * @param msg
 * @param defaultMQProducer
 *
 * @throws com.alibaba.rocketmq.client.exception.MQClientException
 */
public static void checkMessage(Message msg, DefaultMQProducer defaultMQProducer)
        throws MQClientException {
    if (null == msg) {
        throw new MQClientException(ResponseCode.MESSAGE_ILLEGAL, "the message is null");
    }
    // topic
    Validators.checkTopic(msg.getTopic());
    // body
    if (null == msg.getBody()) {
        throw new MQClientException(ResponseCode.MESSAGE_ILLEGAL, "the message body is null");
    }

    if (0 == msg.getBody().length) {
        throw new MQClientException(ResponseCode.MESSAGE_ILLEGAL, "the message body length is zero");
    }

    if (msg.getBody().length > defaultMQProducer.getMaxMessageSize()) {
        throw new MQClientException(ResponseCode.MESSAGE_ILLEGAL,
                "the message body size over max value, MAX: " + defaultMQProducer.getMaxMessageSize());
    }
}
 

public RemotingCommand getConsumerListByGroup(ChannelHandlerContext ctx, RemotingCommand request)
        throws RemotingCommandException {
    final RemotingCommand response =
            RemotingCommand.createResponseCommand(GetConsumerListByGroupResponseHeader.class);
    final GetConsumerListByGroupRequestHeader requestHeader =
            (GetConsumerListByGroupRequestHeader) request
                    .decodeCommandCustomHeader(GetConsumerListByGroupRequestHeader.class);

    ConsumerGroupInfo consumerGroupInfo =
            this.brokerController.getConsumerManager().getConsumerGroupInfo(
                    requestHeader.getConsumerGroup());
    if (consumerGroupInfo != null) {
        List<String> clientIds = consumerGroupInfo.getAllClientId();
        if (!clientIds.isEmpty()) {
            GetConsumerListByGroupResponseBody body = new GetConsumerListByGroupResponseBody();
            body.setConsumerIdList(clientIds);
            response.setBody(body.encode());
            response.setCode(ResponseCode.SUCCESS);
            response.setRemark(null);
            return response;
        } else {
            log.warn("getAllClientId failed, {} {}", requestHeader.getConsumerGroup(),
                    RemotingHelper.parseChannelRemoteAddr(ctx.channel()));
        }
    } else {
        log.warn("getConsumerGroupInfo failed, {} {}", requestHeader.getConsumerGroup(),
                RemotingHelper.parseChannelRemoteAddr(ctx.channel()));
    }

    response.setCode(ResponseCode.SYSTEM_ERROR);
    response.setRemark("no consumer for this group, " + requestHeader.getConsumerGroup());
    return response;
}