Kafka使用入门教程

package com.sohu.kafkademon;

public interface KafkaProperties
{
 final static String zkConnect = "10.22.10.139:2181";
 final static String groupId = "group1";
 final static String topic = "topic1";
 final static String kafkaServerURL = "10.22.10.139";
 final static int kafkaServerPort = 9092;
 final static int kafkaProducerBufferSize = 64 * 1024;
 final static int connectionTimeOut = 20000;
 final static int reconnectInterval = 10000;
 final static String topic2 = "topic2";
 final static String topic3 = "topic3";
 final static String clientId = "SimpleConsumerDemoClient";
}

package com.sohu.kafkademon;

import java.util.Properties;

import kafka.producer.KeyedMessage;
import kafka.producer.ProducerConfig;

/**
 * @author leicui bourne_cui@163.com
 */
public class KafkaProducer extends Thread
{
 private final kafka.javaapi.producer.Producer<Integer, String> producer;
 private final String topic;
 private final Properties props = new Properties();

 public KafkaProducer(String topic)
 {
  props.put("serializer.class", "kafka.serializer.StringEncoder");
  props.put("metadata.broker.list", "10.22.10.139:9092");
  producer = new kafka.javaapi.producer.Producer<Integer, String>(new ProducerConfig(props));
  this.topic = topic;
 }

 @Override
 public void run() {
  int messageNo = 1;
  while (true)
  {
   String messageStr = new String("Message_" + messageNo);
   System.out.println("Send:" + messageStr);
   producer.send(new KeyedMessage<Integer, String>(topic, messageStr));
   messageNo++;
   try {
    sleep(3000);
   } catch (InterruptedException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   }
  }
 }

}

package com.sohu.kafkademon;

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;

/**
 * @author leicui bourne_cui@163.com
 */
public class KafkaConsumer extends Thread
{
 private final ConsumerConnector consumer;
 private final String topic;

 public KafkaConsumer(String topic)
 {
  consumer = kafka.consumer.Consumer.createJavaConsumerConnector(
    createConsumerConfig());
  this.topic = topic;
 }

 private static ConsumerConfig createConsumerConfig()
 {
  Properties props = new Properties();
  props.put("zookeeper.connect", KafkaProperties.zkConnect);
  props.put("group.id", KafkaProperties.groupId);
  props.put("zookeeper.session.timeout.ms", "40000");
  props.put("zookeeper.sync.time.ms", "200");
  props.put("auto.commit.interval.ms", "1000");
  return new ConsumerConfig(props);
 }

 @Override
 public void run() {
  Map<String, Integer> topicCountMap = new HashMap<String, Integer>();
  topicCountMap.put(topic, new Integer(1));
  Map<String, List<KafkaStream<byte[], byte[]>>> consumerMap = consumer.createMessageStreams(topicCountMap);
  KafkaStream<byte[], byte[]> stream = consumerMap.get(topic).get(0);
  ConsumerIterator<byte[], byte[]> it = stream.iterator();
  while (it.hasNext()) {
   System.out.println("receive：" + new String(it.next().message()));
   try {
    sleep(3000);
   } catch (InterruptedException e) {
    e.printStackTrace();
   }
  }
 }
}

package com.sohu.kafkademon;

/**
 * @author leicui bourne_cui@163.com
 */
public class KafkaConsumerProducerDemo
{
 public static void main(String[] args)
 {
  KafkaProducer producerThread = new KafkaProducer(KafkaProperties.topic);
  producerThread.start();

  KafkaConsumer consumerThread = new KafkaConsumer(KafkaProperties.topic);
  consumerThread.start();
 }
}

package com.sohu.kafkademon;

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;

/**
 * @author leicui bourne_cui@163.com
 */
public class KafkaConsumer extends Thread
{
 private final ConsumerConnector consumer;
 private final String topic;

 public KafkaConsumer(String topic)
 {
  consumer = kafka.consumer.Consumer.createJavaConsumerConnector(
    createConsumerConfig());
  this.topic = topic;
 }

 private static ConsumerConfig createConsumerConfig()
 {
  Properties props = new Properties();
  props.put("zookeeper.connect", KafkaProperties.zkConnect);
  props.put("group.id", KafkaProperties.groupId);
  props.put("zookeeper.session.timeout.ms", "40000");
  props.put("zookeeper.sync.time.ms", "200");
  props.put("auto.commit.interval.ms", "1000");
  return new ConsumerConfig(props);
 }

 @Override
 public void run() {
  Map<String, Integer> topicCountMap = new HashMap<String, Integer>();
  topicCountMap.put(topic, new Integer(1));
  Map<String, List<KafkaStream<byte[], byte[]>>> consumerMap = consumer.createMessageStreams(topicCountMap);
  KafkaStream<byte[], byte[]> stream = consumerMap.get(topic).get(0);
  ConsumerIterator<byte[], byte[]> it = stream.iterator();
  while (it.hasNext()) {
   System.out.println("receive：" + new String(it.next().message()));
   try {
    sleep(3000);
   } catch (InterruptedException e) {
    e.printStackTrace();
   }
  }
 }
}