If create is false and the request has no valid Http Session, this method returns null.Parameters: create - true to create a new session for this request if necessary; false to return null if there's no current session Returns: the Http Session associated with this request or null if create is false and the request has no valid session ----- KK session initialize by container, different container has their particular implementation.Seems that the session object relies on server for its GC.
ladder racks for trucks cheap Cheers, AT Session Invalidate() method removes the attributes bind into the session object as well as the session objects also dies where as the Session(false) will return the existing session only, if its not shows null means the session is already existing will be meant.
In a web application, server may be responding to several clients at a time so session tracking is a way by which a server can identify the client.
Thus there will always be a session object present.
What you can do instead is this: 1) When the session starts (the first page of your web-app), insert an object in the session.
There are four techniques which can be used to identify a user session.a) Cookiesb) Hidden Fieldsc) URL Rewritingd) Session Object With Cookies , Hidden Fields and URL rewriting approaches, client always sends a unique identifier with each request and server determines the user session based on that unique identifier where as session tracking approach using Session Object uses the other three techniques internally.
Cookie is a key value pair of information, sent by the server to the browser and then browser sends back this identifier to the server with every request there on.Session()Attribute("user", Parameter("user")); or Session()Attribute("initialized", "true"); 2) when checking for session timeout, check if that object is available in the session.If the session has timed out since it was initialized, the session will contain no objects.2) When a new session is created, it is of course empty.Therefore the Session()Attribute("user") call returns null after a session timeout.As we know HTTP protocol is stateless which means client needs to open a separate connection every time it interacts with server and server treats each request as a new request.