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From "Matt Raible" <li...@raibledesigns.com>
Subject Re: Detecting and handling session timout
Date Wed, 28 Apr 2004 17:26:19 GMT
Here's one solution:

http://tinyurl.com/2hs8e

You also might want to read the comments for people's opinions on this.

Matt

> Bill,
> 
> I am shooting from the hip on this one, but what if you caught the 
> NPE exception in the jsp and redirected them to a login page?
> 
> I know on a lot of sites I have used use this as the basic action. 
> Some say why your redirected, some don't. You could pass a parameter 
> to the login page that would add the notification of session timeout.
> 
> Doug
> 
> ----- Original Message ----- 
> From: "Bill Bruns" <bbruns@fitme.com>
> To: "Tomcat User" <tomcat-user@jakarta.apache.org>
> Sent: Wednesday, April 28, 2004 1:06 PM
> Subject: Detecting and handling session timout
> 
> > Hello Tomcats:)
> >
> > Our technical challenge is that when a session is left inactive in a
> browser
> > for a long time (about 30 minutes)
> > then the next click results in a jsp page crash.
> > The crash is a null pointer exception, apparently because an object in a
> > javabean has become null.
> > Our theory is that the Tomcat session is timing out and that this causes
> the
> > beans to vaporize.
> > Is there a way to avoid this?
> > Presently we are experimenting with the HttpSessionListener interface, in
> > hopes that we can detect the session
> > timing out and throw up a notice on the screen saying "please log in
> again"
> > or some such message.
> > In other words we want to do an asynchronous action from within the
> server,
> > pushed out to the client.
> > However in testing so far we can only detect the creation of the session
> but
> > not its death.
> > In other words, the sessionCreated() part of the interface is being
> executed
> > by the system, but not
> > the sessionDestroyed().
> >
> > I am running Tomcat 4.1.24 on Solaris 8, connected to Apache httpd 2.0.49
> > via the JK connector.
> >
> > Suggestions?
> >
> > Bill Bruns
> >
> >
> > ---------------------------------------------------------------------
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> >
> >
> 
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