JMS Request & Reply

最新推荐文章于 2018-11-23 15:12:00 发布

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最新推荐文章于 2018-11-23 15:12:00 发布

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文章标签： JMS Bean

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本文探讨了Java消息服务(JMS)中的一种常见异常javax.jms.InvalidDestinationException，并通过一个具体的示例展示了如何在不使用消息驱动Bean(MDB)的情况下进行处理。此外，还提供了一个MDB实现的消息监听器示例。

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public String send(LogEntry log) { 
try { 
// QueueSender queuesender = queueSession.createSender(queue); QueueRequestor queueRequestor = new QueueRequestor(queueSession, queue); queueConnection.start(); 
ObjectMessage ob = queueSession.createObjectMessage(log); 
// TextMessage txs = queueSession.createTextMessage(); 
// txs.setText("I'am zhuyefeng !it's true");
 TextMessage reply = (TextMessage) queueRequestor.request(ob);
 String replys = reply.getText(); 
return replys; } 
catch (JMSException e) 
{ // TODO Auto-generated catch block 
e.printStackTrace(); 
return null; }finally{ destroy(); } } 

public void destroy() { 
try { 
queueConnection.close(); 
queueSession.close(); } 
catch (JMSException e) 
{ // TODO Auto-generated catch block 
e.printStackTrace(); } }

 
@MessageDriven(activationConfig = { @ActivationConfigProperty(propertyName = "destinationType", propertyValue = "javax.jms.Queue"), @ActivationConfigProperty(propertyName = "destination", propertyValue = "queue/myQueue") }) @TransactionManagement(TransactionManagementType.BEAN) 

public class ReplyMDB implements MessageListener { public void onMessage(Message msg) { 
InitialContext context; 
QueueConnectionFactory queueConnectionFactory; 
QueueConnection queueConnection = null; QueueSession queueSession = null; Queue queue = null; 
QueueSender queuesender = null ; TextMessage tm = null ; 

try { context = new InitialContext(); 
queueConnectionFactory = (QueueConnectionFactory) context .lookup("ConnectionFactory"); 
queue = (Queue) context.lookup("queue/myQueue");
 queueConnection = queueConnectionFactory.createQueueConnection(); queueConnection.start(); 
queueSession = queueConnection.createQueueSession(false, QueueSession.AUTO_ACKNOWLEDGE); 
tm = queueSession.createTextMessage(); tm.setJMSReplyTo(queue); 
// queueReceiver = queueSession.createReceiver(queue);
 ObjectMessage om = (ObjectMessage) msg; 
LogEntry lg = (LogEntry) om.getObject(); 
queuesender = queueSession.createSender((Queue)om.getJMSReplyTo()); tm.setText("OK"); queuesender.send(tm); } 
catch (JMSException e) { 
e.printStackTrace(); 
try { tm.setText("NG"); queuesender.send(tm); } 
catch (JMSException e1) { e1.printStackTrace(); } }
catch (NamingException e) { e.printStackTrace(); }
finally{ try { queueConnection.close(); queueSession.close(); } 
catch (JMSException e) { e.printStackTrace(); } } }