Wow. What a lot of responses I got. Thanks to all concerned. I'm
used to getting little or no replies from the other lists I'm on.

For the record my environment is Tomcat (5.0.28) with Java 1.4.2.
I do have a batch/queue system - I'm using Quartz
https://quartz.dev.java.net/
(anyone else using this?) which I've wrapped up to do batches of "Jobs"
held in a DB. I only use servlets or JSPs other that than.

For some of my length tasks I have implemented both a servlet front end
and a Quartz "Job" front end. This allows me to run things on-the-fly
or in a "Job".

I'm not using J2EE. That's another issue really, as my system grows
I often wonder if it's outgrown the single-Tomcat, servlet/JSP
environment.
I've never used JMS - is this J2EE only? (I'll Google it later to see).
I'm cranking out all of this stuff on my own, with no other Java
developers
in the company - so a move to J2EE would mean a massive upheaval.


I can see how using a Session could be a way forward but I'll need to
play with it before the penny drops. I guess I need to set some sort
of polling up on the session to detect when complete - I don't want the
user to have to do anything.

I'm going to go and study these replies again! Thank again all - I may
have some follow-up questions.


Chris

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