I haven't been able to do that only by checking if session is null.
I found out that the second test works better
On Thursday 25 April 2002 16:13, Jacob Kjome wrote:
> That's fine, but why would you need to warn the user that the session is
> almost expired? As long as they are active any time within the 15 minutes
> they will have another 15 minutes from the time last accessed. This isn't
> really something you need to keep track of. The only thing you really need
> to worry about is to have checks for session==null when you are using the
> session object and, if so, do the appropriate thing.
>
> If you code with proper null checks, you should never run into a
> NullPointerException.
>
> Jake
>
> At 03:25 PM 4/25/2002 +0200, you wrote:
> >I have found the answer so I give the contribution :
> >
> >
> >//put this code in every page with a @page include
> ><%
> >long timeout = (new Date()).getTime() - session.getLastAccessedTime();
> >if(session==null || (timeout > session.getMaxInactiveInterval()*1000))
> >{
> > throw new MyException("Session has expired : <A HREF='" +
> >response.encodeURL("login.jsp") + "'>reconnect</A>");
> >}
> >%>
> >
> >then catch the exception in error.jsp and print the message
> >
> >On Thursday 25 April 2002 10:16, Raphael Di Cicco wrote:
> > > Hi
> > >
> > > my web application has a timeout of 15 minutes. I'm trying to figure
> > > out how to check whether there is a timeout, and in this case warn the
> > > user to come back to the login page (instead of a horrible
> > > NullPointerException).
> > >
> > > Did anyone come up with a JSP that's working with this ?
> >
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