Question

我试图将一些来自JMS代码的消息放到本地队列管理器中定义的本地队列中。我在WebSphere MQ中定义了一个本地队列LQ，并使用JMS代码来放置消息。我在这里做得好吗我没有在WebSphere队列中看到消息。

以下是代码：

try {
    MQQueueConnectionFactory cf = new MQQueueConnectionFactory();
    //set up the Connection Configuration values

    // Set the properties
      cf.setStringProperty(WMQConstants.WMQ_HOST_NAME, "HostName");
      cf.setIntProperty(WMQConstants.WMQ_PORT, 1414);
      cf.setStringProperty(WMQConstants.WMQ_CHANNEL, "SYSTEM.DEF.SVRCONN");
      cf.setIntProperty(WMQConstants.WMQ_CONNECTION_MODE, WMQConstants.WMQ_CM_CLIENT);
      cf.setStringProperty(WMQConstants.WMQ_QUEUE_MANAGER, "TEST.JMS");

    //JNDI is Not used Here
    MQQueueConnection connection = (MQQueueConnection) cf.createQueueConnection();

    MQQueueSession session = (MQQueueSession) connection.createQueueSession(true, Session.CLIENT_ACKNOWLEDGE);
    MQQueue queue = (MQQueue) session.createQueue("queue:///LQ");
    MQQueueSender sender = (MQQueueSender) session.createSender(queue);
    MQQueueReceiver receiver = (MQQueueReceiver) session.createReceiver(queue);

    long uniqueNumber = System.currentTimeMillis() % 1000;

    JMSTextMessage message = (JMSTextMessage) session.createTextMessage("MQJMSTest "+ uniqueNumber);  
    //MQMessage message =  (MQMessage) session.createTextMessage("MQJMSTest "+ uniqueNumber);


    // Start the connection
    connection.start();

    sender.send(message);
    System.out.println("Sent message:\\n" + message);

    //JMSMessage receivedMessage = (JMSMessage) receiver.receive(10000);
    // System.out.println("\\nReceived message:\\n" + receivedMessage);

    sender.close();
    receiver.close();
    session.close();
    connection.stop();
    connection.close();

    System.out.println("\\nSUCCESS\\n");

} catch (JMSException e) {
    // TODO Auto-generated catch block
    //e.printStackTrace();
    System.out.println(e);
    System.out.println("\\nFAILURE\\n");
}
  catch (Exception e){
      System.out.println(e);
      System.out.println("\\nFAILURE\\n");
}

Answer 1

据此，您已经创建了一个交易会话：

    connection.createQueueSession(true, Session.CLIENT_ACKNOWLEDGE);

根据the docs，

当应用程序关闭事务会话时，隐式回滚发生。当应用程序关闭连接时，隐式回滚发生在所有连接的交易会话中。

回滚会删除队列中的所有消息，然后才能在应用程序外部显示它们。所以我想你可能想要提交交易，是吗？

    sender.send(message);

    // ADD THIS HERE ===========================
    session.commit();
    // ADD THIS HERE ===========================

    System.out.println("Sent message:\\n" + message);

    // THE COMMIT MUST HAVE OCCURRED BEFORE YOU CAN GET THE MESSAGE
    // BACK OUT OF THE QUEUE IN THE NEXT LINES

    //JMSMessage receivedMessage = (JMSMessage) receiver.receive(10000);
    // System.out.println("\\nReceived message:\\n" + receivedMessage);

    // ===================================================
    // DON'T FORGET TO COMMIT THE MESSAGE ON THE WAY BACK OUT OR IT WILL
    // JUST GE TPUT BACK ON THE QUEUE AGAIN.
    // session.commit();
    // ===================================================


    sender.close();
    receiver.close();
    session.close();

PS：请参阅JMS Exception handling部分。 JMS异常是一种多层结构，期望特定于供应商的诊断放置在较低级别的元素中。只有通过打印这些较低级别的元素，才有可能知道传输层认为错误的内容。

无法在WebSphere MQ队列中看到JMS消息

1 个答案: