com.alibaba.rocketmq.client.impl.consumer.RebalancePullImpl Maven / Gradle / Ivy

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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
 *
 *     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 com.alibaba.rocketmq.client.impl.consumer;

import com.alibaba.rocketmq.client.consumer.AllocateMessageQueueStrategy;
import com.alibaba.rocketmq.client.consumer.MessageQueueListener;
import com.alibaba.rocketmq.client.impl.factory.MQClientInstance;
import com.alibaba.rocketmq.common.message.MessageQueue;
import com.alibaba.rocketmq.common.protocol.heartbeat.ConsumeType;
import com.alibaba.rocketmq.common.protocol.heartbeat.MessageModel;

import java.util.List;
import java.util.Set;


/**
 * @author shijia.wxr
 */
public class RebalancePullImpl extends RebalanceImpl {
    private final DefaultMQPullConsumerImpl defaultMQPullConsumerImpl;


    public RebalancePullImpl(DefaultMQPullConsumerImpl defaultMQPullConsumerImpl) {
        this(null, null, null, null, defaultMQPullConsumerImpl);
    }


    public RebalancePullImpl(String consumerGroup, MessageModel messageModel, AllocateMessageQueueStrategy allocateMessageQueueStrategy,
                             MQClientInstance mQClientFactory, DefaultMQPullConsumerImpl defaultMQPullConsumerImpl) {
        super(consumerGroup, messageModel, allocateMessageQueueStrategy, mQClientFactory);
        this.defaultMQPullConsumerImpl = defaultMQPullConsumerImpl;
    }

    @Override
    public void messageQueueChanged(String topic, Set mqAll, Set mqDivided) {
        MessageQueueListener messageQueueListener = this.defaultMQPullConsumerImpl.getDefaultMQPullConsumer().getMessageQueueListener();
        if (messageQueueListener != null) {
            try {
                messageQueueListener.messageQueueChanged(topic, mqAll, mqDivided);
            } catch (Throwable e) {
                log.error("messageQueueChanged exception", e);
            }
        }
    }

    @Override
    public boolean removeUnnecessaryMessageQueue(MessageQueue mq, ProcessQueue pq) {
        this.defaultMQPullConsumerImpl.getOffsetStore().persist(mq);
        this.defaultMQPullConsumerImpl.getOffsetStore().removeOffset(mq);
        return true;
    }

    @Override
    public ConsumeType consumeType() {
        return ConsumeType.CONSUME_ACTIVELY;
    }

    @Override
    public void removeDirtyOffset(final MessageQueue mq) {
        this.defaultMQPullConsumerImpl.getOffsetStore().removeOffset(mq);
    }

    @Override
    public long computePullFromWhere(MessageQueue mq) {
        return 0;
    }

    @Override
    public void dispatchPullRequest(List pullRequestList) {
    }
}