activeMq Topic使用案例

Topic实现publish和subscribe语义：
一条消息被publish时，它将发到所有感兴趣的订阅者，所以零到多个subscriber将接收到消息的一个拷贝。但是在消息代理接收到消息时，只有激活订阅的subscriber能够获得消息的一个拷贝。

这个例子可以先开启生产者，然后再进行消费。

/**
 * 
 */
package activeMQ.topicMessage;

import javax.jms.Connection;
import javax.jms.DeliveryMode;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.jms.TextMessage;
import javax.jms.Topic;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.junit.Test;

/**
 * @author Test
 * @createDate 2014-6-22上午10:57:35
 * @className TopicMsgProducer.java
 * @useFor 
 */
public class TopicMsgProducer {

	public void send() {
		//创建连接工厂
		ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory("tcp://localhost:61616");
		
		Connection conn = null;
		try {
			//创建连接
			conn = factory.createConnection();
			conn.start();
			//创建会话
			Session session = conn.createSession(false,
					Session.AUTO_ACKNOWLEDGE);
			//创建地点
			Topic topic = session.createTopic("topic.textMsg");
			//创建生产者
			MessageProducer producer = session.createProducer(topic);
		    producer.setDeliveryMode(DeliveryMode.PERSISTENT);
		    producer.setTimeToLive(Message.DEFAULT_TIME_TO_LIVE);
			for(int i=0 ; i<10 ;i++) {
				TextMessage tmsg = session.createTextMessage();
				tmsg.setText("早上你好   "+i);
				producer.send(tmsg);
				System.out.println("发送的消息："+tmsg.getText());
			}
		} catch (JMSException e) {
			e.printStackTrace();
		}  finally {
		}
	}
	@Test
	public void test()
	{
		new TopicMsgProducer().send();
	}
}

两个订阅的消费者

/**
 * 
 */
package activeMQ.topicMessage;

import javax.jms.Connection;
import javax.jms.JMSException;
import javax.jms.Session;
import javax.jms.TextMessage;
import javax.jms.Topic;
import javax.jms.TopicSubscriber;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.junit.Test;

/**
 * @author Test
 * @createDate 2014-6-22上午10:58:42
 * @className TopicMsgConsumer.java
 * @useFor 
 */
public class TopicMsgConsumer {

	public void receive() {
		ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory("tcp://localhost:61616");
		Connection conn = null;
		try {
			conn = factory.createConnection();
			conn.setClientID("T1");
			conn.start();
			Session session = conn.createSession(false,
					Session.AUTO_ACKNOWLEDGE);
			//订阅发布模式的 Topic对象 不是Destination
			Topic  topic = session.createTopic("topic.textMsg");
			TopicSubscriber subsriber = session.createDurableSubscriber(topic , "T1" );
			while (true) {
				TextMessage tm = (TextMessage)subsriber.receive() ;
				if (tm == null) {
					break;
				}
				System.out.println("Msg1 Received message: " + tm.getText());
			}


		} catch (JMSException e) {
			e.printStackTrace();
		} finally {
			if (conn != null) {
				try {
					conn.close();
				} catch (JMSException e) {
					e.printStackTrace();
				}
			}
		}
	}
	@Test
	public void test()
	{
		new TopicMsgConsumer().receive();
	}
	
}

/**
 * 
 */
package activeMQ.topicMessage;

import javax.jms.Connection;
import javax.jms.JMSException;
import javax.jms.Session;
import javax.jms.TextMessage;
import javax.jms.Topic;
import javax.jms.TopicSubscriber;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.junit.Test;

/**
 * @author Test
 * @createDate 2014-6-22上午10:58:42
 * @className TopicMsgConsumer.java
 * @useFor
 */
public class TopicMsg2Consumer {

	public void receive() {
		ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory("tcp://localhost:61616");
		Connection conn = null;
		try {
			conn = factory.createConnection();
			conn.setClientID("T2");
			conn.start();
			Session session = conn.createSession(false,
					Session.AUTO_ACKNOWLEDGE);
			// 订阅发布模式的 Topic对象 不是Destination
			Topic  topic = session.createTopic("topic.textMsg");
			TopicSubscriber subsriber = session.createDurableSubscriber(topic , "T2" );
			while (true) {
				TextMessage tm = (TextMessage)subsriber.receive() ;
				if (tm == null) {
					break;
				}
				System.out.println("Msg2 Received message: " + tm.getText());
			}
		} catch (JMSException e) {
			e.printStackTrace();
		} finally {
			if (conn != null) {
				try {
					conn.close();
				} catch (JMSException e) {
					e.printStackTrace();
				}
			}
		}
	}

	@Test
	public void test() {
		new TopicMsg2Consumer().receive();
	}
}