深入掌握JMS（七）：DeliveryMode例子

在下面的例子中，分别发送一个Persistent和nonpersistent的消息，然后关闭退出JMS。

 

import javax.jms.Connection; import javax.jms.DeliveryMode; import javax.jms.MessageProducer; import javax.jms.Queue; import javax.jms.Session; import org.apache.activemq.ActiveMQConnectionFactory; import org.apache.activemq.command.ActiveMQQueue; public class DeliveryModeSendTest { public static void main(String[] args) throws Exception { ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory("vm://localhost"); Connection connection = factory.createConnection(); connection.start(); Queue queue = new ActiveMQQueue("testQueue"); Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE); MessageProducer producer = session.createProducer(queue); producer.setDeliveryMode(DeliveryMode.PERSISTENT); producer.send(session.createTextMessage("A persistent Message")); producer.setDeliveryMode(DeliveryMode.NON_PERSISTENT); producer.send(session.createTextMessage("A non persistent Message")); System.out.println("Send messages sucessfully!"); } }

 

运行上面的程序，当输出“Send messages sucessfully!”时，说明两个消息都已经发送成功，然后我们结束它，来停止JMS Provider。

 

接下来我们重新启动JMS Provicer，然后添加一个消费者：

 

import javax.jms.Connection; import javax.jms.JMSException; import javax.jms.Message; import javax.jms.MessageConsumer; import javax.jms.MessageListener; import javax.jms.Queue; import javax.jms.Session; import javax.jms.TextMessage; import org.apache.activemq.ActiveMQConnectionFactory; import org.apache.activemq.command.ActiveMQQueue; public class DeliveryModeReceiveTest { public static void main(String[] args) throws Exception { ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory("vm://localhost"); Connection connection = factory.createConnection(); connection.start(); Queue queue = new ActiveMQQueue("testQueue"); Session session = connection.createSession(false,Session.AUTO_ACKNOWLEDGE); MessageConsumer comsumer = session.createConsumer(queue); comsumer.setMessageListener(new MessageListener() { public void onMessage(Message m) { try { System.out.println("Consumer get " + ((TextMessage) m).getText()); } catch (JMSException e) { e.printStackTrace(); } } }); } }