Hi,
1. sessionDestroyed is called when the server session terminates either
by timeout or by terminate() method on session. In case, browser is closed,
no other browser instance can be created anywhere in the world with the same
session id as the one that got closed. Hence, the session responsible for
the browser that got closed will ultimately time-out and sessionDestroyed
will be called. So the mathod is called albeit late.
2. If such is your arrangement, you may better send some token (like
'+' or '-') to the independent server which will do addition or substruction
from the number of concurrent users. You need not send the 'user' object.
Send '+' in sessionCretaed() AND '-' IN SESSIONdESTROYED().
Hope this helps.
Regards,
Partha
----------
From: Sandeep Kachalia [SMTP:[EMAIL PROTECTED]
Sent: Friday, June 18, 2004 4:04 PM
To: [EMAIL PROTECTED]
Subject: Re: Concurrent Users
In continuation to the same problem I have two issues.
1. httpSessionListner Interface sounds good but as per my knowledge
sessionDestroyed() method will not be called if browser is closed, so it's
difficult to manage concurrency.
2. let say my 'user' class implements httpSessionListner. I have
another server( not a web/app server) that manages the count of concurrent
users. My web application communiactes to that server using TCP/IP and
passes the 'user' object to server.In this scenerio what should be the right
way of maintaining the count of concurrent users.
Michael Rutherfurd wrote:
Having a clustered environment complicates things :-)
One solution I am looking at is to leverage existing log4j
calls in our code to send messages via a socket appender to a common console
gui app.
One advantage is that the main servlet code doesn't have to
change to support the console which can therefore be developed and enhanced
as a independent side project.
Note also that as of v2.3 there is a new HttpSessionListener
interface with methods sessionCreated() and sessionDestroyed() which gives a
more direct indication than the bound/unbound methods of the
HttpSessionBindingListener interface.
Michael Rutherfurd
"A mailing list for discussion about Sun Microsystem's Java
Servlet API Technology." <[EMAIL PROTECTED]>
<mailto:[EMAIL PROTECTED]> wrote on 17/06/2004 04:19:15 AM:
> Thanks a lot Chris...But will it work in clustered
environment where we
> can have 2 or more number of web containers. Is it
possible to get the
> count in Clustered Environment?
>
> -----Original Message-----
> From: A mailing list for discussion about Sun
Microsystem's Java
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