RabbitMQ (三)消息的发布于订阅

前面的两节中,主要介绍的都是一个生产者对应一个消费者,但是有时候是一个生产者对应多个消费者,这时候,我们就应该使用RabbitMQ的消息发布于订阅功能。

 

 

生产者:

 

import com.rabbitmq.client.ConnectionFactory;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.Channel;
public class ClientSend2 {
    
private static final String exchange_name="my_exchange";
    
private static final String exchange_type="fanout";
    
public static void main(String[] args)
    throws java.io.IOException{
        ConnectionFactory factory
=new ConnectionFactory();
        factory.setHost(
"localhost");
        factory.setVirtualHost(
"my_mq");
        factory.setUsername(
"zhxia");
        factory.setPassword(
"123456");
        Connection connection
=factory.newConnection();
        Channel channel
=connection.createChannel();
        channel.exchangeDeclare(exchange_name, exchange_type); 
//声明exchange,以及类型
        String message="This mesaage is just for test!"+Math.random();
        channel.basicPublish(exchange_name, 
""null, message.getBytes()); //将消息绑定了队列
        System.out.println("Message send:"+message);
        channel.close();
        connection.close();
    }
}

 

 

消费者:

 

 

import com.rabbitmq.client.ConnectionFactory;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.QueueingConsumer;
public class ClientReceive2 {
    
private static final String exchange_name="my_exchange";
    
private static final String exchange_type="fanout";
    
public static void main(String[] args)
    throws java.io.IOException,java.lang.InterruptedException{
        ConnectionFactory factory
=new ConnectionFactory();
        factory.setHost(
"localhost");
        factory.setVirtualHost(
"my_mq");
        factory.setUsername(
"zhxia");
        factory.setPassword(
"123456");
        Connection connection
=factory.newConnection();
        Channel channel
=connection.createChannel();
        channel.exchangeDeclare(exchange_name, exchange_type);
        
//创建两个队列,将它们都绑定到同一个exchange
        String queue_name1=channel.queueDeclare().getQueue();
        channel.queueBind(queue_name1, exchange_name, 
"");
        String queue_name2
=channel.queueDeclare().getQueue();
        channel.queueBind(queue_name2, exchange_name, 
"");
        System.
out.println("Wait for message received!");
        
//创建两个消费者,分别与两个队列相关联
        QueueingConsumer consumer1=new QueueingConsumer(channel);
        channel.basicConsume(queue_name1, 
true, consumer1);
        QueueingConsumer consumer2
=new QueueingConsumer(channel);
        channel.basicConsume(queue_name2,
true, consumer2);
        
//两个消费者分别从各自的队列里面收取消息
        while(true){
            QueueingConsumer.Delivery deliver
=consumer1.nextDelivery();
            String message
=new String(deliver.getBody());
            System.
out.println("Message received[consumer1]:"+message);
            QueueingConsumer.Delivery deliver1
=consumer2.nextDelivery();
            String message1
=new String(deliver1.getBody());
            System.
out.println("Message received[consumer2]:"+message1);
            Thread.sleep(
500);
        }
    }
}

 

posted @ 2011-07-21 14:32  涛光  阅读(4237)  评论(4编辑  收藏  举报