MessageConsumerManager.java

package com.alibaba.rocketmq.storm;

import org.apache.commons.lang.BooleanUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.alibaba.rocketmq.client.consumer.DefaultMQPullConsumer;
import com.alibaba.rocketmq.client.consumer.DefaultMQPushConsumer;
import com.alibaba.rocketmq.client.consumer.MQConsumer;
import com.alibaba.rocketmq.client.consumer.listener.MessageListener;
import com.alibaba.rocketmq.client.consumer.listener.MessageListenerConcurrently;
import com.alibaba.rocketmq.client.consumer.listener.MessageListenerOrderly;
import com.alibaba.rocketmq.client.exception.MQClientException;
import com.alibaba.rocketmq.common.consumer.ConsumeFromWhere;
import com.alibaba.rocketmq.storm.domain.RocketMQConfig;
import com.alibaba.rocketmq.storm.internal.tools.FastBeanUtils;

/**
 * @author Von Gosling
 */
public class MessageConsumerManager {

    private static final Logger          LOG = LoggerFactory
                                                     .getLogger(MessageConsumerManager.class);
    private static DefaultMQPushConsumer pushConsumer;
    private static DefaultMQPullConsumer pullConsumer;

    MessageConsumerManager() {
    }

    public static MQConsumer getConsumerInstance(RocketMQConfig config, MessageListener listener,
                                                 Boolean isPushlet) throws MQClientException {
        LOG.info("Begin to init consumer,instanceName->{},configuration->{}",
                new Object[] { config.getInstanceName(), config });

        if (BooleanUtils.isTrue(isPushlet)) {
            pushConsumer = (DefaultMQPushConsumer) FastBeanUtils.copyProperties(config,
                    DefaultMQPushConsumer.class);
            pushConsumer.setConsumerGroup(config.getGroupId());
            pushConsumer.setConsumeFromWhere(ConsumeFromWhere.CONSUME_FROM_LAST_OFFSET);

            pushConsumer.subscribe(config.getTopic(), config.getTopicTag());
            if (listener instanceof MessageListenerConcurrently) {
                pushConsumer.registerMessageListener((MessageListenerConcurrently) listener);
            }
            if (listener instanceof MessageListenerOrderly) {
                pushConsumer.registerMessageListener((MessageListenerOrderly) listener);
            }
            return pushConsumer;
        } else {
            pullConsumer = (DefaultMQPullConsumer) FastBeanUtils.copyProperties(config,
                    DefaultMQPullConsumer.class);
            pullConsumer.setConsumerGroup(config.getGroupId());
            return pullConsumer;
        }
    }
}