stateful « Bean « JSP-Servlet Q&A





1. Correct usage of Stateful Beans with Servlets    stackoverflow.com

We currently have a Stateful bean that is injected into a Servlet. The problem is that sometimes we get a Caused by: javax.ejb.ConcurrentAccessException: SessionBean is executing another request. [session-key: 7d90c02200a81f-752fe1cd-1] when ...

2. Stateful session bean    coderanch.com

3. HttpSession Vs Stateful session beans    coderanch.com

5. EJB Timer in Stateful session Bean?    coderanch.com

6. Problem with Stateful Session Bean    coderanch.com

9. Stateful bean -again    coderanch.com

Hi. As much as I understand Stateful session beans are used to maintain conversation state. Does anyone can give me an example? I try something like this. I add two variable to my Stateful bean :String name, and int age. First servlet set name variable. Second servlet set age. Third servlet invoke getters of session bean to retrieve a value of ...





10. In EJB 3.0 stateful session bean    coderanch.com

11. Asynchronous notification of a stateful session bean    coderanch.com

Hello everyone, I am new to ejb development and to this forum, and my question is as follows: I have a stateful session bean which at some point in its logic needs to invoke a service via a restful API. The service however cannot return the value to the ejb in the HTTP response as it requires sometime to process the ...

12. How stateful session bean works?    coderanch.com

As I have read some books and article and understand a stateful session bean is always serves a particular client and retain its state using activation and passivate method by the container . Now for following example ,Say User1 log on and get a bean1 and do some work then User2 comes and served by bean2 Now when again User1 comes ...

14. @EJB annotation for Stateful beans    coderanch.com

Hello! I want to ask about the usefulness of @EJB annotations in case of Stateful Session Beans (SFSB). Of course it's very useful when injecting a Stateless one, but let's see the case for a Stateful: If I have a servlet, MyServlet and a SFSB whose interface is MyCart (with an implemenntation MyCartBean). Inside MyServlet code I'd have something like this: ...





18. Stateful session beans and JNDI-Lookup in Netbeans 6.8/EJB 3.1 does not work    coderanch.com

I wanted to test the functionality of a very simple stateful session bean, but nothing works! The JNDI-Lookup does not work as the bean is not found and when I call the bean by Depency-Inection via @EJB annotation the value is not memorized. The stateful session bean: package ch.geo.bean; import javax.annotation.PostConstruct; import javax.ejb.Stateful; import javax.ejb.LocalBean; @Stateful public class NewSessionBean { private ...

19. SessionSynchronization for stateful CMT beans - reloaded    coderanch.com

Hi guys, This is what the EJB 3.0 spec says about stateful bean instances (CMT-based, implementing SessionSynchronization) which are present in the "Transaction Method-Ready" state from their life cycle: Session bean methods invoked by the client in this transaction can now be delegated to the bean instance. An error occurs if a client attempts to invoke a method on the session ...

20. Help on Using Stateful Session Beans (SFSB) the right way    coderanch.com

Hi, I'm trying to shift all business state of my application from HttpSession to SFSB. When the application was still using HttpSession, my classes (session scoped instances) are seperated by the following: Project List Project Information Contract List Contract Information In this case, a project list simply display list of projects. Selecting a project will display project information. A project can ...

21. EJB 2.1 Stateful Session Beans    coderanch.com

25. Observing Stateful Session Bean @PrePassivate and @PostActivate    coderanch.com

I setup a Stateful Session Bean with eclipse using this example: Eclipse Example I have added the @PrePassivate and @PostActivate methods to the CounterBean.java class. Each life-cycle callback method will print out a file to the Glassfish session store location so I know when they are called. When I run the application on the Glassfish server I notice a folder is ...

26. Stateful bean cache    coderanch.com

28. workflow implemetation with stateful session bean    coderanch.com

Hi! I would like to implement a worklflow and I want to use stateful session bean. So the worklfow rather complicated, this has to do some steps and wait for some events, make some decisions, wait again and so on. There is one workflow logic but more workflow instances have to run simultaneously. I want to implement the workflow logic by ...

29. EJB staless/stateful beans and JNDI    coderanch.com

30. stateful session bean state    coderanch.com

Yes, the SFSB lets you to keep the conversational state, so it means that each client will get exactly one instance for his own purpose. I'm not sure how the container maps the SFSB for user, but I guess that it's not defined in the specification but left for the vendor to implement his own mechanism. Once again - this is ...

31. stateful session bean pool size    coderanch.com

33. Stateful Session Beans within Servlets    coderanch.com