Getting Started with WebSphere Application Server

120 Getting Started with WebSphere Application Server Community Edition
Destination destination =
(Queue)jndiContext.lookup("java:comp/env/jms/myQueue");
The following code snippet shows how to access the queue with resource injection.
@Resource(name = "myConnectionFactory")
private ConnectionFactory connectionFactory;
@Resource(name = "jms/myQueue")
private Destination myQueue;
6.4.2 Message-driven beans
The onMessage() method of an MDB is triggered when a message comes to a specific
queue or topic. For this to happen, the deployer has to perform the following:
1. Define a dependency to the JMS resource group in openejb-jar.xml just like
what you did in Listing 6.1
2. Specify the JMS resource link in the openejb-jar.xml as shown in Listing 6.3.
GreetingMDB
myJmsResourceGroup
Listing 6.3 – Define JMS resource link for MDB.
3. Register myQueue as the destination which MDB is listening to as shown in Listing
6.4.
@MessageDriven(activationConfig = {
@ActivationConfigProperty
(propertyName = "destinationType", propertyValue =
"javax.jms.Queue"),
@ActivationConfigProperty
(propertyName = "destination", propertyValue = "myQueue")
})
public class GreetingMDB implements MessageListener {
public void onMessage(Message message) {
TextMessage textMessage = (TextMessage) message;
try {
System.out.println("Recieved message:"+