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Message-ID: <165812.93846.qm@web114713.mail.gq1.yahoo.com>
Date: Fri, 10 Jun 2011 06:11:31 -0700 (PDT)
From: Paul Cazan <paul_cazan@yahoo.com>
Subject: Re: How to handle client disconnection in 'no timeout' async
 servlets?
To: Tomcat Users List <users@tomcat.apache.org>
In-Reply-To: <402452.7384.qm@web114718.mail.gq1.yahoo.com>
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Is it possible that Tomcat 7.0.14 did not implement any sort of 'onDisconne=
ctEvent' for asynchronous servlets 3.0?

I am sure tomcat DOES KNOW when a client browser is closed, since the notif=
ication arrives when using CometProcessor.

Did anyone worked with asynchronous servlets as in Servlet 3.0 specificatio=
n?
--- On Thu, 9/6/11, Paul Cazan <paul_cazan@yahoo.com> wrote:

From: Paul Cazan <paul_cazan@yahoo.com>
Subject: How to handle client disconnection in 'no timeout' async servlets?
To: users@tomcat.apache.org
Date: Thursday, 9 June, 2011, 3:22 PM

Hello,
I am using Tomcat 7.0.14. I used to have a servlet implementing CometProces=
sor to process asynchronous streams, with timeout set very high (Integer.MA=
X_VALUE), and all worked fine. When I close the browser, the servlet is not=
ified immediately about that (CometEvent.EventType.END) and I am happy to d=
o the cleanup.
No, I have created an async servlet 3.0, and all works as I expected, excep=
t for notification when the browser is closed. I used request.startAsync(),=
 I added AsyncListener, and none of the events get fired when the browser i=
s suddenly closed. Since I set the timeout to a large value (Long.MAX_VALUE=
), AsyncListener.onTimeout will never get called.
As far as I understand, onComplete will get called only when I call AsyncCo=
ntext.complete(), and I do not know when to call it. I tried to write on re=
sponse.getWriter(), expecting to see an exception, but no exception was thr=
own after a couple of writes.
How can I handle this situation using servlet api 3.0, when the user closes=
 the browser or hits the stop button? I need to do the cleanup for that cli=
ent.Meanwhile, I reverted the source code to CometProcessor.
Thanks a lot,Paul
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