Hi Martin,
What you told about sharing sessions betwen different browsers is true
only in following circumstances:
- Having the SAME browser open a new window
like Netscape does in menu "File->New->Navigator Window" .
- The servlet runner sets a "timed" cookie instead a session cookie.
"timed" cookies specify an expire time, while the simpler, session
cookies are those cookies wich make no mention about their life-time.
Browsers should keep session cookies only in memory, without
saving them to disk, and discarding them when program ends.
At least Netscape behaves this way.
Some more-sophisticated RAM-spare browsers might share memory
betwen different processes of the same binary, including session-cookies.
Servlet-runners should not use timed-cookies for session tracking.
(at least that's what I think, opinions may vary)
So, different instances of the same browser *should* not share the same
cookie-based session.
If they do, then mabe the servlet-runner developer/docs will help.
Or try 'the other' browser, dont want to flame here about wich one...
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Anyway,
You should not rely *only* in internal-session-keeped data and row
pointer to display paged resultsets. Add extra information like currently
shown page-or-line-number and (if needed) some-result-set-id
within your hrefs or hidden-form-fields.
Just to protect against fast&nasty users that multiply windows,
push back-buttons, clik-link-right-button-open-in-new-many-windows,
and other terrific (inter)actions for innocent servlet/web developers
like us.. :-)
Cezar
> Martin Eberle wrote:
> >
> > !! A user opens two instances of the same browser !!
> >
> > So there can be two ore more call's to a servlet (with the same
> > sessiondata) !!
> > ->That means: What about the members of helper-classes ?
> > -> how can I synchronize this situation ?
> >
> > Specific problem:
> > My servlets serve as an ecommerce-system:
> > 1. To navigate through the resultset of a database-query I set a cookie
> > (identifies set of products) to the client
> > 2. The user post two simultanious querys -> the slower query-process
> > sets the final cookie.
> > 3. So the user navigate in both browser windows throw the same set of
> > products!
> >
> > thanks martin
> >
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