Kafka消息接收

package com.paile.kafka.service.impl;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

import kafka.consumer.ConsumerConfig;
import kafka.consumer.ConsumerIterator;
import kafka.consumer.KafkaStream;
import kafka.javaapi.consumer.ConsumerConnector;

import org.apache.log4j.Logger;

import com.paile.command.MessageConsumerCommand;
import com.paile.command.receiver.message.MessageConsumerReceiver;
import com.paile.kafka.bean.MessageBean;
import com.paile.utils.others.ObjectStreamManager;
public class GroupConsumerManager {

	private final ConsumerConnector consumer;
    private final String topic;
    private  ExecutorService executor;
    private Logger logger = Logger.getLogger(GroupConsumerManager.class);
 
    public GroupConsumerManager(String a_zookeeper, String a_groupId, String a_topic) {
        consumer = kafka.consumer.Consumer.createJavaConsumerConnector(
                createConsumerConfig(a_zookeeper, a_groupId));
        this.topic = a_topic;
    }
 
    public void shutdown() {
        if (consumer != null) consumer.shutdown();
        if (executor != null) executor.shutdown();
    }
	public void run(int a_numThreads)throws Exception {
        Map<String, Integer> topicCountMap = new HashMap<String, Integer>();
        topicCountMap.put(topic, new Integer(a_numThreads));
        Map<String, List<KafkaStream<byte[], byte[]>>> consumerMap = consumer.createMessageStreams(topicCountMap);
        List<KafkaStream<byte[], byte[]>> streams = consumerMap.get(topic);
        System.out.println(streams.size());
        //
        executor = Executors.newFixedThreadPool(a_numThreads);
        //
        for (final KafkaStream<byte[], byte[]> stream : streams) {
            ConsumerIterator<byte[], byte[]> it = stream.iterator();
            while(it.hasNext()){
            	byte[] bt = it.next().message();
            	try {
    				Object object = null;
					try {
						object = ObjectStreamManager.getInstance().toObject(bt);
	    				if(object!=null&&object instanceof MessageBean){
	    					//接收到消息 把消息封装成MessageConsumerCommand命令，交后续执行
	    					MessageBean bean = (MessageBean) object;
	    					MessageConsumerReceiver receiver = new MessageConsumerReceiver(bean);
	    					MessageConsumerCommand command = new MessageConsumerCommand(receiver);
	    					command.execute();
	    				}
					} catch (Exception e) {
						e.printStackTrace();
					}

    			} catch (Exception e) {
    				throw e;
    			}
            }
        }
    }
 
    private ConsumerConfig createConsumerConfig(String a_zookeeper, String a_groupId) {
        Properties props = new Properties();
        props.put("zookeeper.connect", a_zookeeper);
        props.put("group.id", a_groupId);
        props.put("zookeeper.session.timeout.ms", "15000");
        props.put("zookeeper.sync.time.ms", "2000");
        props.put("auto.commit.interval.ms", "10000");
 
        return new ConsumerConfig(props);
    }
 
    public static void main(String[] args) {
        String zooKeeper = "192.168.1.101:2181";
        String groupId = "pailegroup";
        String topic = "paile01";
        int threads = Integer.parseInt("1");
 
        GroupConsumerManager example = new GroupConsumerManager(zooKeeper, groupId, topic);
        System.out.println("--------");
        try {
			example.run(threads);
		} catch (Exception e) {
			e.printStackTrace();
		}
        try {
            Thread.sleep(10000);
        } catch (InterruptedException ie) {
 
        }
        example.shutdown();
    }
}