You might look into implementing the
javax.servlet.hhtp.HttpSessionBindingListener interface, this will allow
you to act when an object is added/removed from the session. Simply put, you could write valueBound/UnBound methods that set Cookies into the HttpResponse.


-Mark

[EMAIL PROTECTED] wrote:

Hi,

I am new to the java webapp development. I want to store some user
data for my app in a client side cookie rather than as a server side
object and referencing it with a sessionId. One of the main reasons
for that is - we will be running multiple servers load balancing.
Since the HTTPSessions are java container instance specific - I don't
want to use them. I have read about distributed Session support - but
it does involve complicated setup and seems to be a overkill when
compared to the data that I want to store.

Anyway - in that aspect - I have these 2 questions :

1. Is there a way to override the HTTPSession and HTTPResponse
provided by tomcat to save the contents of the Session as a cookie
instead of just storing the sessionId ?

2. If I implement my own Session class, and store it as a attribute
in the HTTPRequest object, how can I write the contents of the
session as a cookie right before I return the response ? The way I
used to do it in other apps in C++ is to write a destructor for my
session object, which will get called when the request is being
terminated and I could write the cookie in the response. But the java
equivalent to destructor "finalize()" is not gauranteed to be called
until the GC wakes up. So how can I make sure I set the cookie after
the request is completely processed?

Please pardon my ignorance if made any wrong assumptions. I would
appreciate any help. regards, Praveen

--
Mark Diggory
Software Developer
Harvard MIT Data Center
http://www.hmdc.harvard.edu

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