Thanks Yoav and Tim, I will studied your solutions ...
Shapira, Yoav wrote:
Hi,
Enumeration list = servletContext.getActiveSession();
To solve this problem i have put a list attribute in the context. And
use a session listener to refresh this list ... but the problem is that
the session are persistent during a stop but not the context attributes
which became outdated ...
Your solution isn't far from what you need. But you might want to read the Servlet Spec or its JavaDocs a tiny bit more, where you'll discover the HttpSessionActivationListener.
Write a listener that's both an HttpSessionListener and an HttpSessionActivationListener. Have this listener maintain a list (or map by session ID, or Set to prevent duplicates, or whatever data structure fits your needs) of active sessions. Add to the list both when a session is created and when it's activated, and remove from it both when it's destroyed and when it's passivated. At least that will be the initial version of your listener. Test and tweak as needed for whatever your requirements are.
Yoav
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