日期:2014-05-16 浏览次数:20808 次
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=10.0.30.221:2181
以及默认注释掉的
#host.name=localhost改成host.name=10.0.30.221
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