I'm not sure I exactly understand your requirement Heinz, but a couple of
times now I have used the java.util.Stack class to stored a LIFO queue of
visited pages. This is maintained in the application's controlling servlet
and stored at the session scope. The controlling servlet understands a
special web action "back", which forwards to the previous page by poping it
off the Stack.
I have used this mechanism to control "wizard" style interactions, where the
user is presented with a dynamic sequence of pages that they can traverse
back and forward through to eventually complete some sort of system
transaction. Seems to work ok, with a bit more work I think it could be
abstracted out into a generic "wizard controller" class.
Regard
Drew Cox
> -----Original Message-----
> From: Heinz Wehner [SMTP:[EMAIL PROTECTED]]
> Sent: Sunday, January 30, 2000 8:23 AM
> To: [EMAIL PROTECTED]
> Subject: Tracking visited pages
>
> A common task to solve is navigating a hierarchy. Now how
> should this be implemented if every page is dynamically
> generated by a servlet?
>
> If the client's browser cache and JavaScript capabilities
> should not be used, we need some mechanism to remember the
> visited pages on the server. This may be done by using URL
> rewriting to enumerate already visited pages. The session
> object seems to be the right container.
>
> Is this a feasable approach? Are there other solutions?
>
> Heinz Wehner
> (Karlsruhe, Germany)
>
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