I hope he means stored as an XML doc.  Parsing DOMs are notoriously slow.

-----Original Message-----
From: Eddie Bush [mailto:[EMAIL PROTECTED]]
Sent: Monday, September 23, 2002 5:41 PM

Sounds like a simple DB-lookup to me.  You aren't going to update the 
client until they refresh at page at least.  You'd just have to include 
something that polled for new messages in each page you wanted them to 
receive notification.  I'm not familiar with what you mean by "stored as 
a DOM" or the implications of that, so maybe this is a bad suggestion ;-)

Vernon Wu wrote:

>I need to implement a message system, sort like email but inside the Java
web application only for its users. After one 
>user, A, sends a message to another, B, B shall be notified to retrieve the
updated messages if B is on line. I plan to 
>implement messages as stored in a DOM. My question is how the notification
shall be implemented.  I only use a web 
>container, and considering to add in a JMS server for IM.
>
>Any suggestions?
>
>Thanks,
>
>Vernon
>

-- 
Eddie Bush




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