com.alibaba.rocketmq.broker.processor.ConsumerManageProcessor.java Source code

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/**
 * 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
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * 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 com.alibaba.rocketmq.broker.processor;

import com.alibaba.rocketmq.broker.BrokerController;
import com.alibaba.rocketmq.broker.client.ConsumerGroupInfo;
import com.alibaba.rocketmq.common.constant.LoggerName;
import com.alibaba.rocketmq.common.protocol.RequestCode;
import com.alibaba.rocketmq.common.protocol.ResponseCode;
import com.alibaba.rocketmq.common.protocol.header.*;
import com.alibaba.rocketmq.remoting.common.RemotingHelper;
import com.alibaba.rocketmq.remoting.exception.RemotingCommandException;
import com.alibaba.rocketmq.remoting.netty.NettyRequestProcessor;
import com.alibaba.rocketmq.remoting.protocol.RemotingCommand;
import io.netty.channel.ChannelHandlerContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.List;

/**
 * @author shijia.wxr
 */
public class ConsumerManageProcessor implements NettyRequestProcessor {
    private static final Logger log = LoggerFactory.getLogger(LoggerName.BROKER_LOGGER_NAME);

    private final BrokerController brokerController;

    public ConsumerManageProcessor(final BrokerController brokerController) {
        this.brokerController = brokerController;
    }

    @Override
    public RemotingCommand processRequest(ChannelHandlerContext ctx, RemotingCommand request)
            throws RemotingCommandException {
        switch (request.getCode()) {
        case RequestCode.GET_CONSUMER_LIST_BY_GROUP:
            return this.getConsumerListByGroup(ctx, request);
        case RequestCode.UPDATE_CONSUMER_OFFSET:
            return this.updateConsumerOffset(ctx, request);
        case RequestCode.QUERY_CONSUMER_OFFSET:
            return this.queryConsumerOffset(ctx, request);
        default:
            break;
        }
        return null;
    }

    @Override
    public boolean rejectRequest() {
        return false;
    }

    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;
    }

    private RemotingCommand updateConsumerOffset(ChannelHandlerContext ctx, RemotingCommand request)
            throws RemotingCommandException {
        final RemotingCommand response = RemotingCommand
                .createResponseCommand(UpdateConsumerOffsetResponseHeader.class);
        final UpdateConsumerOffsetRequestHeader requestHeader = (UpdateConsumerOffsetRequestHeader) request
                .decodeCommandCustomHeader(UpdateConsumerOffsetRequestHeader.class);
        this.brokerController.getConsumerOffsetManager().commitOffset(
                RemotingHelper.parseChannelRemoteAddr(ctx.channel()), requestHeader.getConsumerGroup(),
                requestHeader.getTopic(), requestHeader.getQueueId(), requestHeader.getCommitOffset());
        response.setCode(ResponseCode.SUCCESS);
        response.setRemark(null);
        return response;
    }

    private RemotingCommand queryConsumerOffset(ChannelHandlerContext ctx, RemotingCommand request)
            throws RemotingCommandException {
        final RemotingCommand response = RemotingCommand
                .createResponseCommand(QueryConsumerOffsetResponseHeader.class);
        final QueryConsumerOffsetResponseHeader responseHeader = (QueryConsumerOffsetResponseHeader) response
                .readCustomHeader();
        final QueryConsumerOffsetRequestHeader requestHeader = (QueryConsumerOffsetRequestHeader) request
                .decodeCommandCustomHeader(QueryConsumerOffsetRequestHeader.class);

        long offset = this.brokerController.getConsumerOffsetManager().queryOffset(requestHeader.getConsumerGroup(),
                requestHeader.getTopic(), requestHeader.getQueueId());

        if (offset >= 0) {
            responseHeader.setOffset(offset);
            response.setCode(ResponseCode.SUCCESS);
            response.setRemark(null);
        } else {
            long minOffset = this.brokerController.getMessageStore().getMinOffsetInQuque(requestHeader.getTopic(),
                    requestHeader.getQueueId());
            if (minOffset <= 0 && !this.brokerController.getMessageStore()
                    .checkInDiskByConsumeOffset(requestHeader.getTopic(), requestHeader.getQueueId(), 0)) {
                responseHeader.setOffset(0L);
                response.setCode(ResponseCode.SUCCESS);
                response.setRemark(null);
            } else {
                response.setCode(ResponseCode.QUERY_NOT_FOUND);
                response.setRemark("Not found, V3_0_6_SNAPSHOT maybe this group consumer boot first");
            }
        }

        return response;
    }
}