ActiveMQ实战之 Topic发布订阅消息

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对于此类消息，其实就是指使用JMS中的发布订阅消息模型的消息，下面是一个简单的例子

消息发布者

[java] view plain copy print ?

1. package com.googlecode.garbagecan.jmsstudy.activemq.topic;  
2.   
3. import org.apache.activemq.ActiveMQConnectionFactory;  
4.   
5. import javax.jms.*;  
6.   
7. public class TopicPublisher {  
8.     public static void main(String[] args) throws JMSException {  
9.         ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory("tcp://localhost:61616");  
10.         Connection connection = factory.createConnection();  
11.         connection.start();  
12.           
13.         Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);  
14.         Topic topic = session.createTopic("myTopic.messages");  
15.   
16.         MessageProducer producer = session.createProducer(topic);  
17.         producer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);  
18.   
19.         while(true) {  
20.             TextMessage message = session.createTextMessage();  
21.             message.setText("message_" + System.currentTimeMillis());  
22.             producer.send(message);  
23.             System.out.println("Sent message: " + message.getText());  
24.   
25.             try {  
26.                 Thread.sleep(1000);  
27.             } catch (InterruptedException e) {  
28.                 e.printStackTrace();  
29.             }  
30.         }  
31.   
32. //      session.close();  
33. //      connection.stop();  
34. //      connection.close();  
35.     }  
36. }  

package com.googlecode.garbagecan.jmsstudy.activemq.topic;import org.apache.activemq.ActiveMQConnectionFactory;import javax.jms.*;public class TopicPublisher { public static void main(String[] args) throws JMSException {  ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory("tcp://localhost:61616");  Connection connection = factory.createConnection();  connection.start();    Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);  Topic topic = session.createTopic("myTopic.messages");  MessageProducer producer = session.createProducer(topic);  producer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);  while(true) {   TextMessage message = session.createTextMessage();   message.setText("message_" + System.currentTimeMillis());   producer.send(message);   System.out.println("Sent message: " + message.getText());   try {    Thread.sleep(1000);   } catch (InterruptedException e) {    e.printStackTrace();   }  }//  session.close();//  connection.stop();//  connection.close(); }}

消息订阅者（消息消费者）

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1. package com.googlecode.garbagecan.jmsstudy.activemq.topic;  
2.   
3. import org.apache.activemq.ActiveMQConnectionFactory;  
4.   
5. import javax.jms.*;  
6.   
7. public class TopicSubscriber {  
8.     public static void main(String[] args) throws JMSException {  
9.         ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory("tcp://localhost:61616");  
10.         Connection connection = factory.createConnection();  
11.         connection.start();  
12.           
13.         Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);  
14.         Topic topic = session.createTopic("myTopic.messages");  
15.   
16.         MessageConsumer consumer = session.createConsumer(topic);  
17.         consumer.setMessageListener(new MessageListener() {  
18.             public void onMessage(Message message) {  
19.                 TextMessage tm = (TextMessage) message;  
20.                 try {  
21.                     System.out.println("Received message: " + tm.getText());  
22.                 } catch (JMSException e) {  
23.                     e.printStackTrace();  
24.                 }  
25.             }  
26.         });  
27. //      session.close();  
28. //      connection.stop();  
29. //      connection.close();  
30.     }  
31. }  

package com.googlecode.garbagecan.jmsstudy.activemq.topic;import org.apache.activemq.ActiveMQConnectionFactory;import javax.jms.*;public class TopicSubscriber { public static void main(String[] args) throws JMSException {  ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory("tcp://localhost:61616");  Connection connection = factory.createConnection();  connection.start();    Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);  Topic topic = session.createTopic("myTopic.messages");  MessageConsumer consumer = session.createConsumer(topic);  consumer.setMessageListener(new MessageListener() {   public void onMessage(Message message) {    TextMessage tm = (TextMessage) message;    try {     System.out.println("Received message: " + tm.getText());    } catch (JMSException e) {     e.printStackTrace();    }   }  });//  session.close();//  connection.stop();//  connection.close(); }}

分别运行两个类，就可以看到Publisher发布的类，Subscriber都可以接受到。

           

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