在提交 JTA 事务之前为 JMS 消息激活 MDB

Question

我需要将 JTA 事务与发送 JMS 消息同步 - MDB 应在客户端 JTA 事务提交后激活。 这在使用 XAConnectionFactory 时应该是可能的，但在我的示例中不起作用。

示例场景：

• Web 服务客户端发送代码 = 0 的消息
• mdb 接收消息并打印：START: code (NEW JTA TRANSACTION)
• mdb 增量代码并打印：SEND: %code + 1%
• mdb 发送带有新代码值的消息
• mdb 睡眠
• mdb 打印：END 代码
• mdb 完成（事务提交）

场景重复，直到代码

START: 0
SEND: 1
END: 0
START: 1
SEND: 2
END: 1
START: 2
SEND: 3
END: 2
etc..

但目前我得到：

...
START: 4
SEND: 5
END: 3
START: 5
SEND: 6
END: 4
START: 6
SEND: 7
END: 5
END: 6

我的代码：

• 网络服务客户端

  @WebMethod
  @TransactionAttribute(TransactionAttributeType.REQUIRES_NEW)
  public void publish() {
      TestQueueUtil.sendToQueue(0);
  }
  

• TestQueueUtil（JMS 客户端）

  public static void sendToQueue(Integer code) {
    InitialContext initialContext;
    XAQueueConnection queueConnection = null;
    XAQueueSession queueSession = null;
  
    try {
      Hashtable env = new Hashtable();
      env.put(Context.INITIAL_CONTEXT_FACTORY, "weblogic.jndi.WLInitialContextFactory");
      initialContext = new InitialContext(env);
      XAConnectionFactory queueConnectionFactory = (XAConnectionFactory) initialContext.lookup("jms/dsk/ConnectionFactoryXA");
  
      queueConnection = (XAQueueConnection) queueConnectionFactory.createXAConnection();
      queueConnection.start();
  
      queueSession = queueConnection.createXAQueueSession();
      Queue queue = (Queue) initialContext.lookup("jms/dsk/TestQueue");
  
      //QueueSender sender =
      MessageProducer producer = queueSession.createProducer(queue);
      Message jmsMessage = queueSession.createMessage();
  
      jmsMessage.setIntProperty("code", code);
      producer.send(jmsMessage);
      producer.close();
      queueConnection.stop();
  
  } catch (Exception e) {
      throw new RuntimeException("sendToQueue", e);
  } finally {
      if (queueSession != null) {
          try {
              queueSession.close();
          } catch (Exception e) {
              //ignore
          }
      }
      if (queueConnection != null) {
          try {
              queueConnection.close();
          } catch (Exception e) {
              //ignore
          }
      }
    }
  
  }
  

• TestQueueMDB

  @MessageDriven(mappedName = "jms/dsk/TestQueue", activationConfig = {
          @ActivationConfigProperty(propertyName = "acknowledgeMode", propertyValue = "Auto-acknowledge"),
          @ActivationConfigProperty(propertyName = "destinationType", propertyValue = "javax.jms.Queue")
  })
  public class TestQueueMDB implements MessageListener {
  
      @Resource
      protected MessageDrivenContext messageDrivenContext;
  
      @TransactionAttribute(TransactionAttributeType.REQUIRES_NEW)
      public void onMessage(Message message) {
          Integer code = null;
          try {
  
              code = message.getIntProperty("code");
              System.out.println("START: " + code);
              if (code < 10) {
                  Integer newcode = code + 1;
                  System.out.println("SEND: " + newcode);
                  TestQueueUtil.sendToQueue(newcode);
                  Thread.sleep(2000);
              }
          } catch (Exception e) {
              e.printStackTrace();
          } finally {
              System.out.println("END: " + code);
          }
      }
  }
  

我做错了什么？

Answer 1

我发现我在 MDB 上没有事务上下文！！！

当我通过调用检查交易 ID 时

weblogic.transaction.TxHelper.getTransactionId() 

收到null，当调用messageDrivenContext.getRollbackOnly()得到异常

java.lang.IllegalStateException: [EJB:010156]Illegal attempt to call EJBContext.getRollbackOnly() from an EJB that was not participating in a transaction.

原因是注释

@TransactionAttribute(TransactionAttributeType.REQUIRES_NEW)

删除或更改后

@TransactionAttribute(TransactionAttributeType.REQUIRED)

一切正常。

:)