Java EE Servlet Example

Example configuration

Example step-by-step

To deploy and start the server, type ant deployfrom the example directory
Once the server has started type ant run to run the example.
To remove the new profile type ant undeploy.

1. First we need to get an initial context so we can look-up the JMS connection factory and destination objects from JNDI. This initial context will get it's properties from the jndi.properties file in the directory config

           initialContext = new InitialContext();
        

2. We look up the JMS queue object from JNDI

           Queue queue = (Queue) initialContext.lookup("/queue/testQueue");
        

3. We look up the JMS connection factory object from JNDI

           ConnectionFactory cf = (ConnectionFactory) initialContext.lookup("/TestServletConnectionFactory");
        

4. We create a JMS connection

           connection = cf.createConnection();
        

5. We create a JMS session. The session is created as non transacted and will auto acknowledge messages.

           Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
        

6. We create a JMS message producer on the session. This will be used to send the messages.

          MessageProducer messageProducer = session.createProducer(queue);
       

7. We create a JMS text messages that we are going to send.

            TextMessage message = session.createTextMessage("This is a text message");
        

8. We send messages to the queue

           messageProducer.send(message);
        

9. We create a JMS Message Consumer

           MessageConsumer messageConsumer = session.createConsumer(queue);
        

10. We start the connection

            connection.start();
        

11. We receive the message

            TextMessage messageReceived = (TextMessage) messageConsumer.receive(5000);
        

12. And finally, always remember to close your JMS connections and resources after use, in a finally block. Closing a JMS connection will automatically close all of its sessions, consumers, producer and browser objects

           finally
           {
              if (initialContext != null)
              {
                initialContext.close();
              }
              if (connection != null)
              {
                 connection.close();
              }
           }