Howdy,
>I am pretty newbie with servlets and I got stock now. How can I access
a
>specific session from Servlet?
You mean a specific session by its ID? This is possible with a little
work (see below), but not usually a good idea. If you want the current
user session, just use request.getSession(). From you message, I think
this is really what you want. If servlet one calls the above, it will
get a session. If servlet1 puts stuff in the session, and then servlet2
calls request.getSession() it will get the same session (for the same
user).
Try it out first before trying this:
To get a specific session by ID, you need to keep a map of them. Use an
HttpSessionListener, e.g.
public class SessionTracker implements HttpSessionListener {
private static Map sessionsById;
public void sessionCreated(HttpSessionEvent hse) {
if(sessionsById == null) {
sessionsById = Collections.synchronizedMap(new HashMap());
}
sessionsById.put(hse.getSession().getId(), hse.getSession());
}
public void sessionDestroyed(HttpSessionEvent hse) {
sessionsById.remove(hse.getSession().getId());
}
public static HttpSession getSession(String sessionId) {
return (HttpSession)sessionById.get(sessionId);
}
}
Then you servlets can do SessionTracker.getSession(sessionId) to get a
specific session. But like I said, I don't think you need the above.
Yoav Shapira
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