Configuring a Life Cycle Callback Interceptor Method on an EJB 3.0 Session Bean

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

• Post-construct

• Pre-destroy

• Pre-passivate (stateful session beans only)

• Post-activate (stateful session beans only)

Note:

Do not specify pre-passivate or post-activate life cycle callback methods on a stateless session bean.

The session 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 session bean (see "Configuring a Life Cycle Callback Interceptor Method on an Interceptor Class of an EJB 3.0 Session Bean").

For more information, see the following:

• "What is the Stateless Session Bean Life Cycle?"

• "What is the Life Cycle of a Stateful Session Bean?"

• "Life Cycle Callback Methods on a Bean Class"

Using Annotations

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

• @PostConstruct

• @PreDestroy

• @PrePassivate (stateful session beans only)

• @PostActivate (stateful session beans only)

Example 5-3 shows how to use the @PostConstruct annotation to specify EJB 3.0 stateful session bean class method initialize as a life cycle callback method.

Example 5-3 @PostConstruct

@Stateful
public class CartBean implements Cart {
    private ArrayList items;
 
    @PostConstruct
    public void initialize() {
        items = new ArrayList();
    }
...
}