kafka生产消费者demo

生产者代码:

package cn.itcast.kafka;
import java.util.Properties;
import kafka.javaapi.producer.Producer;
import kafka.producer.KeyedMessage;
import kafka.producer.ProducerConfig;

public class ProducerDemo {
    public static void main(String[] args) {
        Properties props = new Properties();
        props.put("zk.connect", "shizhan1:2181,shizhan2:2181,shizhan3:2181");
        props.put("metadata.broker.list", "shizhan1:9092,shizhan2:9092,shizhan3:9092");
        props.put("serializer.class", "kafka.serializer.StringEncoder");
        ProducerConfig config = new ProducerConfig(props);
        Producer<String, String> producer = new Producer<String, String>(config);
        for (int i = 1; i <= 2; i++)
            producer.send(new KeyedMessage<String, String>("firstTopic", "mkl_content"
            ));
    }
}

消费者代码:

package cn.itcast.kafka;

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

import kafka.consumer.Consumer;
import kafka.consumer.ConsumerConfig;
import kafka.consumer.KafkaStream;
import kafka.javaapi.consumer.ConsumerConnector;
import kafka.message.MessageAndMetadata;

public class ConsumerDemo {
    private static final String topic = "firstTopic";
    private static final Integer threads = 2;

    public static void main(String[] args) {
        
        Properties props = new Properties();
        props.put("zookeeper.connect", "shizhan1:2181,shizhan2:2181,shizhan3:2181");
        props.put("group.id", "vvvvv");
        props.put("auto.offset.reset", "smallest");

        ConsumerConfig config = new ConsumerConfig(props);
        ConsumerConnector consumer =Consumer.createJavaConsumerConnector(config);
        Map<String, Integer> topicCountMap = new HashMap<String, Integer>();
        topicCountMap.put(topic, threads);
        Map<String, List<KafkaStream<byte[], byte[]>>> consumerMap = consumer.createMessageStreams(topicCountMap);
        List<KafkaStream<byte[], byte[]>> streams = consumerMap.get(topic);
        
        for(final KafkaStream<byte[], byte[]> kafkaStream : streams){
            new Thread(new Runnable() {

                public void run() {
                    for(MessageAndMetadata<byte[], byte[]> mm : kafkaStream){
                        String msg = new String(mm.message());
                        System.out.println(msg);
                    }
                }
            }).start();
        }
    }
}