kafka Windows客户端Linux服务器---转

2022-09-22 16:28:04

原文：http://blog.csdn.net/jingshuigg/article/details/25001979

一、对于服务器端的搭建可以参考上一篇文章：kafka单机版环境搭建与测试

服务器端IP ：10.0.30.221

运行环境的目录如下：

需要改动config文件夹下的server.properties中的以下两个属性

zookeeper.connect=localhost:2181改成zookeeper.connect=00.00.00.01 (IP地址):2181

以及默认注释掉的

#host.name=localhost改成host.name=00.00.00.01 (IP地址)

host.name不更改会造成客户端报如下的错误

Exception in thread "Thread-0" kafka.common.FailedToSendMessageException: Failed to send messages after 3 tries.

at kafka.producer.async.DefaultEventHandler.handle(DefaultEventHandler.scala:90)

at kafka.producer.Producer.send(Producer.scala:76)

at kafka.javaapi.producer.Producer.send(Producer.scala:33)

at its.kafka.Producer.run(Producer.java:46)

上述步骤完成以后，按照《kafka单机版环境搭建与测试》中的方法启动zookeeper-server和kafka-server即可

二、客户端搭建

客户端使用的win7系统，在Eclipse中连接服务器

1.在eclipse下新建工程kafka_producer,目录如下：

注意：将config文件夹下的log4j.properties文件放在src下，这样才起作用，可以观测到日志信息

producer的代码如下：

import java.util.Properties;

import kafka.producer.KeyedMessage;

import kafka.producer.ProducerConfig;

public class Producer extends Thread{

    private final kafka.javaapi.producer.Producer<Integer, String> producer;

    private final String topic;

    private final String name;

    private final int numsOfMessage;

    private final Properties props = new Properties();

    public Producer(String name,String topic,int numsOfMessage){

        props.put("serializer.class", "kafka.serializer.StringEncoder");

        props.put("metadata.broker.list", "10.0.30.221:9092");

        //异步发送

        //props.put("producer.type", "async");

        //每次发送多少条

        //props.put("batch.num.messages", "100");

        producer = new kafka.javaapi.producer.Producer<Integer, String>(new ProducerConfig(props));

        this.topic = topic;

        this.name = name;

        this.numsOfMessage = numsOfMessage;

    }

      public void run() {

          int messageNo = 1;

          while(messageNo <= numsOfMessage) { //每个生产者生产的消息数；

              String message = new String(name+"'s    Message_" + messageNo+"******");

              KeyedMessage<Integer, String> messageForSend = new KeyedMessage<Integer, String>(topic, message);

              producer.send(messageForSend);

              messageNo++;

          }

          producer.close();

     }

}

启动producer的代码如下：

import java.util.concurrent.TimeUnit;

public class KafkaProducerDemo implements KafkaProperties{

    public static void main(String[] args){

        StartThread(1,"testTopic",10);

    }

    /**

     * @param numsOfProducer  生产者的数目

     * @param topic        消息的主题

     * @param numsOfMessage    每个生产者生产的消息树

     * @return

     */

    public static void StartThread(int numsOfProducer,String topic,int numsOfMessage){

        for(int i = 1; i <= numsOfProducer; i ++ ){

            String name = "Producer" + i;

            new Producer(name,topic,numsOfMessage).start();

        }

    }

}

2.在eclipse下新建kafka_consumer工程，目录如下：

consumer代码如下：

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;

public class Consumer extends Thread {

  private final ConsumerConnector consumer;

  private final String topic;

  private final String name;

  public Consumer(String name,String topic){

    consumer = kafka.consumer.Consumer.createJavaConsumerConnector(

            createConsumerConfig());

    this.topic = topic;

    this.name = name;

  }

  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", "60000");

    props.put("zookeeper.sync.time.ms", "200");

    props.put("auto.commit.interval.ms", "1000");

    //每次最少接收的字节数，默认是1

    //props.put("fetch.min.bytes", "1024");

    //每次最少等待时间，默认是100

    //props.put("fetch.wait.max.ms", "600000");

    return new ConsumerConfig(props);

  }

  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("************"+name+"    gets    "+new String(it.next().message()));

    }

  }

}

启动consumer的代码：

public class KafkaConsumerDemo implements KafkaProperties

{

  public static void main(String[] args){

    //Consumer1

    Consumer consumerThread1 = new Consumer("Consumer1",KafkaProperties.topic);

    consumerThread1.start();

  }

}

properties的代码(为了传递属性值，当然也可以是xml提供属性值)：

public interface KafkaProperties{

  final static String zkConnect = "10.0.30.221:2181";

  final static  String groupId = "group1";

  final static String topic = "testTopic";

  final static String kafkaServerURL = "10.0.30.221";

  final static int kafkaServerPort = 9092;

  final static int kafkaProducerBufferSize = 64*1024;

  final static int connectionTimeOut = 100000;

  final static int reconnectInterval = 10000;

  final static String clientId = "SimpleConsumerDemoClient";

}

3.启动consumer然后再启动producer，则在eclipse的Console窗口中观察到：

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