On Mon, 21 Oct 2002 [EMAIL PROTECTED] wrote: > Thanks for the comments, Milt. > > From a JSP (To my understanding anyway - I just re-checked it in a > book) - it would appear you CAN assume the session object is not > null - I quote: 'An implicit script language variable of type > javax.servlet.http.HttpSession is available for use in the page, > with the name session. It will represent the existing session, or > if there is no session existing already a new session will be > created.' - unless one sets explicitly to not use sessions, anyway > :) > > Granted, if I had pulled the session out of the HttpServletRequest - > that would be another matter and it would be wise to check whether > that session object was null or not. > > But - anyway - we're splitting hairs :)
Ah, OK, I'm more used to using sessions in servlets, not JSPs, so I wasn't 100% sure about this. > And you're right - I didn't address the question as it was asked but > I guess I read it wrong! No matter! > > I believe Dave (who replied earlier) might be on the right track > with the HttpSessionListener class but I would have to play around > with that a bit to see how it works! Well, some of the session stuff should help -- but depending on exactly what they want to do, they may need to roll their own, at least for some of it. > -----Original Message----- > From: Milt Epstein [mailto:mepstein@;uiuc.edu] > Sent: Monday, October 21, 2002 3:04 PM > To: Tomcat Users List > Subject: RE: Session Time out - Tomcat > > > On Mon, 21 Oct 2002 [EMAIL PROTECTED] wrote: > > > Lior, > > > > One easy way to do this is to store something in the session when > > you log the user on (a user name or some unique piece of > > information) - you probably already do this - and when you do any > > jsps or servlets, try doing session.getAttribute on that item - if > > its null - the session is timed out. > > > > I am sure there are other ways to do this but this is definitely an > > easy way to do it! > > I think this is an easy way to get NullPointerException's as well :-). > (You're not checking that session is not null, and I don't think you > can assume that.) > > And I don't think you're really addressing the original question > (although I'm not sure the original question is so clear). > > Basically, I think what the original poster asked about can be done, > but they'll have to do most of it themselves. > > Frankly, one thing I'm a little unclear on, if a session is > invalidated, either via a timeout or programmatically, is what will > happen to next time getSession is called (with the create parameter > set to false). Will it return null, or will it return an invalidated > session. I'd think it'd return null, but then I'm not sure of why > isRequestedSessionIdValid exists. This makes a difference with regard > to whether/how you can distinguish between someone who's new to the > app and someone who was there before but who's session was invalidated. > > > > e.g > > <% > > if(session.getAttribute("whatever")==null) > > { > > %> > > <jsp:forward page="some logout page.jsp"/> > > <%}%> > > > > -----Original Message----- > > From: Lior Shliechkorn [mailto:liorshliech@;yahoo.com] > > Sent: Monday, October 21, 2002 1:40 PM > > To: Tomcat > > Subject: Session Time out - Tomcat > > > > When Tomcat times a session out, as instructed in the web.xml, is there a > > way to capture that so a page can be displayed that the session has timed > > out, or even prompt the user if he would like to continue being logged on? > > > > Thanks, > > > > Lior > > Milt Epstein > Research Programmer > Integration and Software Engineering (ISE) > Campus Information Technologies and Educational Services (CITES) > University of Illinois at Urbana-Champaign (UIUC) > [EMAIL PROTECTED] > > > -- > To unsubscribe, e-mail: > <mailto:tomcat-user-unsubscribe@;jakarta.apache.org> > For additional commands, e-mail: > <mailto:tomcat-user-help@;jakarta.apache.org> > Milt Epstein Research Programmer Integration and Software Engineering (ISE) Campus Information Technologies and Educational Services (CITES) University of Illinois at Urbana-Champaign (UIUC) [EMAIL PROTECTED] -- To unsubscribe, e-mail: <mailto:tomcat-user-unsubscribe@;jakarta.apache.org> For additional commands, e-mail: <mailto:tomcat-user-help@;jakarta.apache.org>
