Hey Antonio, 2011/9/19 Antonio Mancina <[email protected]>: > Here some issues arise. In my application there are several > reasons for having a modal dialog windows on top, providing > the user with some feedbacks about the ongoing process. > I've just noticed that if a user closes the Wt application > browser tab (I use google chrome) the session is not released > until it expires due to timeout. This implies that, in > case the user repeats this many times, the thread pool is > exhausted and the wt system does not serve any more > user requests. Everything works fine with no modal dialogs > shown on screen: as soon as the user closes the tab, the > wt server detects this event and properly deallocates the > session without waiting for the timeout to expire.
You actually see a difference in the same browser with a dialog open or not for the session to be released? Then that is a bug. > Even worse, in firefox, closing a tab even in non-modal con- > ditions does not _always_ leads to a session closure. > I don't know when and why this happens, but from a certain > moment on, four different users issuing firefox requests (v. 5 > and v. 6.0.2) did not happen to imply a session deallocation, > while a chrome request did. No, you can't simply rely this event since it isn't specified how browsers should deal with pending ajax requests while closing the window. Therefore there is a "race condition" in the browser between delivering the ajax request and closing the window, which is solved in browsers in non-specified ways. > 1) Is this "session closing in modal condition not corresponding > to an immediate session deallocation" an expected behaviour? No. The fact that a modal dialog is open should not have an effect. I'll try to reproduce this. > 2) Is the firefox abnormal behaviour known and expected? This is known behavior. > 3) Also, would it be possible to detect thread pool exhaustion at > code-level, avoiding the user being stuck waiting for a timeout > to happen? Actually, there is no reason to lock a thread while showing modal dialogs. You can also show a modal dialog by using show(), and binding listeners to its accept(), reject() or done() methods. The behavior is the same, but it is a bit less convenient to implement. Regards, koen ------------------------------------------------------------------------------ BlackBerry® DevCon Americas, Oct. 18-20, San Francisco, CA Learn about the latest advances in developing for the BlackBerry® mobile platform with sessions, labs & more. See new tools and technologies. Register for BlackBerry® DevCon today! http://p.sf.net/sfu/rim-devcon-copy1 _______________________________________________ witty-interest mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/witty-interest
