JMS Context Example

This example shows you how to send and receive a message to a JMS Queue using ActiveMQ by using a JMS Context

A JMSContext is part of JMS 2.0 and combines the JMS Connection and Session Objects into a simple Interface

Example step-by-step

To run the example, simply type mvn verify -Pexample from this directory

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 client-jndi.properties file in the directory ../common/config

           InitialContext initialContext = getContext();
        

2. We look-up the JMS queue object from JNDI

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

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

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

4. We create a JMS context

           jmsContext = cf.createContext();
        

5. We create a JMS Producer, set the delivery mode and send a message all in one line. Note that we don't pass a message to the send method but just a String.

           jmsContext.createProducer().setDeliveryMode(DeliveryMode.PERSISTENT).send(queue, "this is a string")
        

6. We create a JMS message consumer and receive the payload of the message directly

          String payLoad = jmsContext.createConsumer(queue).receiveBody(String.class);
       

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

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

8. 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 (jmsContext != null)
              {
                 jmsContext.close();
              }
           }