Apache Active MQ 之Topic

最新推荐文章于 2020-01-20 00:19:00 发布

iteye_15431

最新推荐文章于 2020-01-20 00:19:00 发布

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分类专栏： Java 文章标签： Apache JMS ActiveMQ thread

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本文通过示例介绍了如何使用Apache ActiveMQ实现发布/订阅模式的消息传递。包括生产者发送消息到Topic，以及多个消费者接收同一份消息的过程。

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Apache Active MQ 之Topic：

Pre-Condition：安装好Apache ActiveMQ并启动服务

消费者：


package com.wx.jms.topic;

import javax.jms.Connection;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageListener;
import javax.jms.Session;
import javax.jms.TextMessage;
import javax.jms.Topic;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.command.ActiveMQTopic;

/**
 * @Class name:	Topic_Test.java
 *
 * Short description on the purpose of the program.
 *
 * @author:		wangxiang
 * @modified:	Mar 22, 2011
 *
 */

public class Topic_Test {

	/**
	 * @param args
	 */
	public static void main(String[] args) throws Exception {
		ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory("tcp://localhost:61616");
		Connection conn = factory.createConnection();
		conn.start();

		Topic topic = new ActiveMQTopic("mqtopic");
		Session session = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);

		MessageConsumer consumer1 = session.createConsumer(topic);
		consumer1.setMessageListener(new MessageListener(){
			public void onMessage(Message msg) {
				try {
					System.out.println("consumer1:" + ((TextMessage)msg).getText());
				} catch (JMSException e) {
					e.printStackTrace();
				}
				try {
					Thread.currentThread().sleep(1000);
				} catch (InterruptedException e) {
					e.printStackTrace();
				}
			}
		});

		MessageConsumer consumer2 = session.createConsumer(topic);
		consumer2.setMessageListener(new MessageListener(){
			public void onMessage(Message msg) {
				try {
					System.out.println("consumer2:" + ((TextMessage)msg).getText());
				} catch (JMSException e) {
					e.printStackTrace();
				}
				try {
					Thread.currentThread().sleep(1000);
				} catch (InterruptedException e) {
					e.printStackTrace();
				}
			}
		});

	}

}

生产者：


package com.wx.jms.topic;

import javax.jms.Connection;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.jms.Topic;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.command.ActiveMQTopic;

/**
 * @Class name: TopicProducer_Main.java
 * 
 *        Short description on the purpose of the program.
 * 
 * @author: wangxiang
 * @modified: Mar 22, 2011
 * 
 */

public class TopicProducer_Main {

	/**
	 * @param args
	 */
	public static void main(String[] args) throws Exception {
		ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory(
				"tcp://localhost:61616");
		Connection conn = factory.createConnection();
		conn.start();

		Topic topic = new ActiveMQTopic("mqtopic");
		Session session = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
		MessageProducer producer = session.createProducer(topic);
		for (int i = 1; i < 12; i++) {
			producer.send(session.createTextMessage("msg " + i));
		}
		conn.stop();
	}

}

结果：
[b]consumer1:msg 1
consumer2:msg 1
consumer1:msg 2
consumer2:msg 2
consumer1:msg 3
consumer2:msg 3
consumer1:msg 4
consumer2:msg 4
consumer1:msg 5
consumer2:msg 5
consumer1:msg 6
consumer2:msg 6
consumer1:msg 7
consumer2:msg 7
consumer1:msg 8
consumer2:msg 8
consumer1:msg 9
consumer2:msg 9[/b]