Hi,
A example is available in Professional JSP from wrox, pls check
it out
John thomas
Venkat <[EMAIL PROTECTED]>@java.sun.com> on 02/01/2001 02:50:03
PM
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Subject: Disallowing concurrent login
Hi All
This has reference to an previous discussion on 'disallowing
concurrent
login' and Mr.Hans Bergsten came out with a suggestion of implementing
HttpSessionBindingListener interface, add every new user to a vector,
check
the existence when a new user logs in ...
I have implemented a solution similar to that, create a table to store
details such as sessionId, User Ip, User's unique login id, session
created
time etc., check the table for login id, if not found, create a new
session,
add the loginid to that table and deny new session if the login id is
found
in the table. so, if the same user or anybody with the same loginid
tries
to sign again is redirected to another page which shows the details
such the
session details from the table
This method works as long the user signs out using another jsp page
which
removes all cookies and invalidates the session, but the probelm is
that if
the user closes the browser window without signing out, those details
are
never removed from the table and he will not be able to login at all
unless
someone removes his details from the table
Here, I am looking for a mechanism
1. which allows the tomcat container to remove all expired sessions
from
using sessions Ids,
2. Inform the first logged in user, log him out, invalidate that
session
and create new session for the newly signed in user
3. A method which can invalidate a session by its session Id (such
as
session.invalidate(sessionId), becuse HttpSession.invalidate()
method
does not take any arguement and invalidate current session)
I am contemplating this to work similar to Yahoo Messanger
(invalidates old
session and creates new)
I seek your valuable suggestions
Thanks in advance
Venkat
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