I use a generic MDB as a Batch Treatment Service that calls back stateless beans. It's not a big deal to do it and the JVM JMS communication layer make it work very fast.

--
Gaetan Zoritchak
Bright Side Factory
http://www.bs-factory.com


Alex Sumner wrote:
Thanks,

I'm not worried that the MDB approach will be hard to program. It's more
that there will be a lot of these messages and I'm not sure if an MDB
will become a bottleneck, it seems like using a lot of stuff to do a
little thing.

Alex

-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Rodrigo
Chand�a
Sent: 28 March 2003 15:23
To: [EMAIL PROTECTED]
Subject: Re: [JBoss-user] Starting threads from session beans


Actually, a MDB is rather easy to program. Give it a try. It might yust
fit your need.


Of course you can do all that pooling with JMX.

Regards,

Rodrigo Chandia

El Viernes 28 de Marzo del 2003 04:22 AM, Alex Sumner escribi�:

Thanks Rahul and David,

Maybe I have to think again. Considered MDBs, but they seem like overkill for what I need. I just want to kick off some background activity when a user does something via a session bean.

I can avoid starting a new thread by having one waiting in a pool, but


I still need some wait/notify synchronization between the session bean


thread and the pooled ones. So it's still in the prohibited category -


"bean must not attempt to start, stop, suspend, or resume a thread".

I'd be interested to hear what the detailed consequences in JBoss are,


if anyone knows offhand?

Cheers,

Alex

-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Rahul Ganjoo
Sent: 28 March 2003 05:41
To: [EMAIL PROTECTED]
Subject: RE: [JBoss-user] Starting threads from session beans



J2EE spec doesnt allow u to start threads in EJBs...it gets too messy if you try... try MDBs...


-----Original Message-----
From: Alex Sumner [mailto:[EMAIL PROTECTED]
Sent: Friday, March 28, 2003 1:45 AM
To: [EMAIL PROTECTED]
Subject: [JBoss-user] Starting threads from session beans


Hi,


Briefly: is it permissible to start a new thread from a thread running


in a session bean?

I've heard that it isn't allowed, but can't see this explicitly prohibited in the J2EE specs. More importantly, what will the consequences be in JBoss? If the session bean thread is in a TX, would


I be correct in assuming the new thread will not be associated with that TX?

Thanks,

Alex



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