JMS transactions

In this section, let's see how we can include transactions in messaging. We shall first demonstrate messaging without transactions using a few scenarios. We shall first describe the scenarios and write a test case. Then, we shall develop an application around it. We shall demonstrate sending messages using the convertandsendmessage() method.

• Scenario 1: This is a positive use case, which we have seen in previous sections as well.
  

  @Test
  public void testCorrectMessage() throws InterruptedException {
    Order order = new Order(0, "notification to deliver correctly");
    ordersender.convertAndSendMessage(QUEUE_INCOMING, order);
    
    Thread.sleep(6000);
    printResults();
    
    assertEquals(1, getSavedOrders());
    assertEquals(0, getMessagesInQueue(QUEUE_INCOMING));
    assertEquals(0, getMessagesInQueue(QUEUE_DLQ));
  }

• Scenario 2: Here, let's use a negative scenario. The message producer sends information to the queues and the consumer reads it, but an exception occurs...