When is the stateful session bean destroyed?

Question

I am new to ejbs and I want to know whether a stateful session bean will be destroyed or not. I injected a stateful session bean in my servlet. Even after 30min I see that the bean is active. I am using jboss eap 6.0. I believe that HttpSession has nothing to do with a stateful session bean. I invalidated the HttpSession to make sure that HttpSession has nothing to do with the statful session bean. So what if my application has many users and for each user if I create a new bean, the performance of my server is brought down. How does the container manage stateful session beans. When is a bean removed or destroyed?

I read this post and few others. But I did not get clarity.

Check out the Oracle Java EE 7 tutorial. They have an example for a statefull session bean. If you want to build a scalable application, stay away from statelfull server code and rather have the client maintain all state. — Ralf
Thank you, that helped. When the client terminates, its session bean appears to terminate and is no longer associated with the client. I closed and opened my browser and sent the same request and I can see that the stateful bean is no more. — Krishna Chaitanya
That still doesn't answer for me exactly how it works though. I know that it is the client that keeps a stateful bean alive, but how does that work in relation to a browser? I assume that you made the EJB session scoped? — Gimby
Yeah, the ejb is session scoped. I think the app server will maintain somekind of timestamps, browser details and something else to determine the session. — Krishna Chaitanya

Unknown Unknown · Accepted Answer · 2016-03-29T16:24:56

A Stateful Session Bean is not client contextualized and must be destroyed explicitly within your code.

1) The SFSB must define a method annotated by @Remove :

@Stateful
@Local(ILocalQuiz.class)
public class QuizBean implements ILocalQuiz{

//...

    @Remove
    @Override
    public void end() {
        System.out.println("QuizBean instance will be removed..");
    }

}

2) The SessionScoped bean must call explicitly end() method :

public void cleanUp(){
    System.out.println("Cleaning up before destroying the SessionScoped  bean.");
    quizProxy.end();
}

When is the stateful session bean destroyed?

2 Answers