This seems like something you might do in a servlet filter. Have you
considered user specific namespaces if you completely want user data in
silos? You can set the namespace in the servlet filter:

http://code.google.com/appengine/docs/java/multitenancy/multitenancy.html

--
Ikai Lan
Developer Programs Engineer, Google App Engine
plus.ikailan.com | twitter.com/ikai



On Wed, Jan 11, 2012 at 12:31 PM, meiaestro <[email protected]> wrote:

> Thanks for the reply.****
>
> ** **
>
> You're right. I did not use the Users API, as I do not want to force the
> users to have a google account (or any other existing account). This will
> be optional at a later point in time.****
>
> ** **
>
> The user authentication happens on server side by a self-programmed
> algorithm. Username and the hash values of the user's password are stored
> in the datastore. So far this authentication is independent from any
> session ID.****
>
>
> Hope this helps a bit.
>
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