Configuring a Life Cycle Callback Interceptor Method on an EJB 3.0 MDB

You can specify an EJB 3.0 message-driven bean class method as a callback method for any of the following life cycle events (see "Using Annotations"):

• Post-construct

• Pre-destroy

The message-driven bean class life cycle callback method must have the following signature:

void <METHOD>()

You can also specify one or more life cycle callback methods on an interceptor class that you associate with an EJB 3.0 message-driven bean (see "Configuring a Life Cycle Callback Interceptor Method on an Interceptor Class of an EJB 3.0 MDB").

For more information, see the following:

• "What is the Life Cycle of a Message-Driven Bean?"

• "Life Cycle Callback Methods on a Bean Class"

Using Annotations

You can specify an EJB 3.0 message-driven bean class method as a life cycle callback method using any of the following annotations:

• @PostConstruct

• @PreDestroy

Example 10-9 shows how to use the @PostConstruct annotation to specify EJB 3.0 message-driven bean class method initialize as a life cycle callback method.

Example 10-9 @PostConstruct in an EJB 3.0 Message-Driven Bean

@MessageDriven
public class MessageLogger implements MessageListener {
    @Resource javax.ejb.MessageDrivenContext mc;

    public void onMessage(Message message) {
    ....
    }

    @PostConstruct
    public void initialize() {
        // Initialization logic
    }
...
}