/**
 * 
 */
package test.kafka;

import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Properties;

import kafka.consumer.ConsumerConfig;
import kafka.consumer.ConsumerIterator;
import kafka.consumer.KafkaStream;
import kafka.javaapi.consumer.ConsumerConnector;
import kafka.serializer.StringDecoder;
import kafka.utils.VerifiableProperties;

/**
 * 
 * @Description: TODO(添加描述)
 * @Date 2014年10月13日-下午5:24:22
 * @Author: qizai
 * @Version: V1.0.0
 */
public class KafkaConsumer {
	private final ConsumerConnector consumer;

	private KafkaConsumer() {
		Properties props = new Properties();
		// zookeeper 配置
		props.put("zookeeper.connect", "192.168.1.105:2181");

		// group 代表一个消费组
		props.put("group.id", "jd-group");

		// zk连接超时
		props.put("zookeeper.session.timeout.ms", "4000");
		props.put("zookeeper.sync.time.ms", "200");
		props.put("auto.commit.interval.ms", "1000");
		props.put("auto.offset.reset", "smallest");
		// 序列化类
		props.put("serializer.class", "kafka.serializer.StringEncoder");

		ConsumerConfig config = new ConsumerConfig(props);

		consumer = kafka.consumer.Consumer.createJavaConsumerConnector(config);
	}

	void consume() {
		Map<String, Integer> topicCountMap = new HashMap<String, Integer>();
		topicCountMap.put(KafkaProducer.TOPIC, new Integer(1));

		StringDecoder keyDecoder = new StringDecoder(new VerifiableProperties());
		StringDecoder valueDecoder = new StringDecoder(new VerifiableProperties());

		Map<String, List<KafkaStream<String, String>>> consumerMap = consumer.createMessageStreams(
				topicCountMap, keyDecoder, valueDecoder);
		KafkaStream<String, String> stream = consumerMap.get(KafkaProducer.TOPIC).get(0);
		ConsumerIterator<String, String> it = stream.iterator();
		while (it.hasNext())
			System.out.println(it.next().message());
	}

	public static void main(String[] args) {
		new KafkaConsumer().consume();
	}
}
