Depends on what suits your purpose best. What I did was the following:

I used Flowscript to maintain the sessions. I never checked the validity of a session (that seemed impossible, but that might have changed in the meantime?), I simply called:

        cocoon.session;

This reactivates the existing session if still available, or simply creates a 
new one.

After this, you can set attributes on the session and store most kind of data 
in them:

        cocoon.session.setAttribute("name", obj);

You can also getAttribute("name") and invalidate() this way..

User id's can be stored safely in session attributes. Storing non-streamable objects in them might require you to change caching setting, keeping cache in memory instead of being able to write it to disk..

HTH,
Geert

Angelo Immediata wrote:

Hi all. Is possible with cocoon check if a session id is still alive?
I must unteract with another application; i pass to this application the 
current user's session id; after some times the flow comes back to my 
application and by using a web service it passes to me the session id; i must 
check if this session id is still alive... is this possible? If so... how can i 
do?

Moreover... i have also the id of the user that used the other application, i 
must recover from the session all is data... can i search in a way between all 
the session token the token i want?
Yhanks to all.

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