Hi Geeta,
I am using HttpSessionBindingListener and its working fine.
Subramaniam Olaganathan
Tata Consultancy Services
Mailto: [EMAIL PROTECTED]
Website: http://www.tcs.com
"Geeta Ramani"
<[EMAIL PROTECTED]
k.com> To
"Struts Users Mailing List
07/30/2004 07:30 (E-mail)" <[EMAIL PROTECTED]>
PM cc
Subject
Please respond to HttpSessionListener vs.
"Struts Users HttpSessionBindingListener
Mailing List"
<[EMAIL PROTECTED]
he.org>
Hi everyone:
I would like some clarification regarding the HttpSessionListener. (We are
using servlet spec 2.3)
Here's what I want to do: When a session expires, either when a user uses
the "logout" feature or due to time-out, I want to delete a certain row
from the database. The specifics of which row to delete is stored in an
attribute in an "user" object in the session.
My existing solution which i don't believe works: Write a class that
implements the HttpSessionListener and override the
sessionDestroyed(HttpSesssionEvent) method. In the sessionDestroyed method,
call the HttpSessionEvent.getSession() to get the session, query the
session to get the user and carry on.
However, here's an entry in my logs:
"java.lang.IllegalStateException: getAttribute: Session already
invalidated"
So i looked up the Javadocs for the HttpSessionListener and indeed here's
the description for HttpSessionListener.sessionDestroyed method:
Notification that a session was invalidated. .
Note the use of the *past* tense!! Thus, for example, it seems you cannot
query the session for anything at this point!
Googling produced this page which seems to describe the problem I am
facing.
http://archives.java.sun.com/cgi-bin/wa?A2=ind0207&L=servlet-interest&F=&S=&P=32332
Since this (and others I found like it) are dated over two years ago, I'd
like you comments on:
Proposed solution: Seeing as it seems that I cannot query the session for
any attributes after it has already been invalidated, I therefore should
make my **User** class implement the HttpSessionBindingListener interface
and overwrite the valueUnbound method.
Is my understanding correct? How do others do this sort of thing?
Thank you in advance for any replies!
Geeta
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