Here's an example how to use JMS XA (sends 5 messages to a queue and then receives them):

      XAQueueConnectionFactory qcf = null;
      XAQueueConnection qc = null;
      XAQueueSession qs = null;
      QueueSender sender = null;
      QueueReceiver receiver = null;
      Queue queue = null;
      XAResource xares = null;

      qcf = (XAQueueConnectionFactory) ctx.lookup(name);
      qc = qcf.createXAQueueConnection();
      qc.start();
      queue = (Queue)ctx.lookup(queueName);
      qs = qc.createXAQueueSession();
      xares = qs.getXAResource();
      sender = qs.getQueueSession().createSender(queue);
      receiver = qs.getQueueSession().createReceiver(queue);

      Xid xid = new XidImpl();
      xares.start(xid, XAResource.TMNOFLAGS);
      TextMessage msg = qs.createTextMessage();
      for (int i = 0; i < 5; i++)
      {
        msg.setText("Msg: " + i);
        sender.send(msg, DeliveryMode.NON_PERSISTENT, Message.DEFAULT_PRIORITY, Message.DEFAULT_TIME_TO_LIVE);
      }
      xares.end(xid, XAResource.TMSUCCESS);
      xares.prepare(xid);
      xares.commit(xid, false);

      xid = new XidImpl();
      xares.start(xid, XAResource.TMNOFLAGS);
      for (int i = 0; i < 5; i++)
      {
        msg = (TextMessage) receiver.receive(2000);
        assertTrue("Received msg==null", msg != null);
      }
      xares.end(xid, XAResource.TMSUCCESS);
      xares.prepare(xid);
      xares.commit(xid, false);

Note that the Xid is what you have to provide (in the above example it's our test XidImpl). It must be a separate branch for JMS.