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Batch-like jobs in GlassFish 3.1.2.2

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ljnelson
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Joined: 2003-08-04
Points: 0

I'm looking for inspiration on various approaches to implement batch jobs
on GlassFish 3.1.2.2.

We have a centralized UI and (at the moment) a single ear deployment model
that has served us well so far.

As we implement more and more requirements, a fair amount of them involve
slurping up a bunch of person identifiers and then running various
batch-like jobs over those identifiers. The UI ends up being a glorified
cron/at scheduler, but kicks these off using either @Asynchronous EJBs or
message queues. Think generating thousands of relatively complicated mail
merge documents, that sort of thing. As data sets go, this is a drop in
the ocean, but the processing itself can be relatively intense.

I get queasy thinking about several of these rather intense jobs running on
the same VM against the database. I can think of several approaches to
implementing them differently, but so far the full-on standard Java EE
deployment model has served us so well that I don't want to move away from
it.

Is this a case for clustering the whole app? Or do people spawn new
processes, or...?

I'm aware that JSR 352 is out and I can't wait to take advantage of it, but
even that, as I understand it, would still cause the batch jobs to run on
the same VM; run too many batch jobs and there goes your resources. I'm
sure I must be missing something.

Anyhow, looking for other users-list subscribers' approaches here; any and
all tips are gratefully received.

Thanks,
Best,
Laird

--
http://about.me/lairdnelson

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pires
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Joined: 2012-06-01
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You can cluster your app and load-balance jobs with JMS. Or you can migrate to JEE 7 and GF4 but I'm not sure how to cluster it as I'm still learning about this batch thing.

With JMS is as easy as creating a Queue resource for a cluster and produce serializable objects (jobs) with enough info to be processed by some MDBs (@MessageDriven).
In this case, take a look at https://community.jboss.org/wiki/ShouldICacheJMSConnectionsAndJMSSessions