Personally I'm not really fond of using the MVC-terminology to describe this scenario
of EJB. Also I add a layer of Entities behind the Session. In this case (using
MVC-terminology) the Entity is the Model, the Session is the Controller, the Servlet
is the Renderer (responsible for Presentation) and the Browser is the View.
To answer your question. The interface javax.ejb.Handle is required to be implemented
as an serializable class by EJB container and can be accessed through the
EJBObject.getHandle() method. This can used as a value in the
HttpSession.putValue()-method. It can also be serialized and sent to the client side
as a base64-encoded String if your appserver doesn't support session-tracking etc. etc.
Personally the only thing I use the HttpSession.putValue()-method for is to save the
handle to the session. The SessionBean is used for all session-state. Also only the
SessionBean manipulates the entities, never the Servlet.
-----Original Message-----
From: Mike [SMTP:[EMAIL PROTECTED]]
Sent: Wednesday, March 24, 1999 6:20 PM
To: [EMAIL PROTECTED]
Subject: Servlets -> EJB Session Persistence
My question is how do I maintain session state when using HTML, Servlets and EJB's?
Scenario:
1) An HTML client(view) invokes a servlet. 2) The servlet(controller) calls an EJB
Session bean (Model). 3)The Servlet sends a response back to the client and
terminates. The HTML client invokes the servlet to do something
else, and so on.
Question:
1) How do you maintain a reference to the Session Bean once the Servlet destroy()
method is called?
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