For a light weight approach, I have been using a CORBA Event Service model
for this with GemStone/J. Several of our customers have found this approach
agreeable. Ultimately JMS is the way to go, but the JMS stuff is pretty new.
-Chris.
> -----Original Message-----
> From: Eric Hughes [SMTP:[EMAIL PROTECTED]]
> Sent: Friday, August 13, 1999 8:00 AM
> To: [EMAIL PROTECTED]
> Subject: Re: EJBs and events
>
> We've given some thought (haven't built much) to this.
> Either the Event Service or the Asynchronous Messaging from
> CORBA seem more appealing if there's a possibility of clients
> that aren't Java.
> We've also used some research-ware to manage subscriptions,
> profiles and the like; see http://www.cda.mews.org/ or
> drop me a line if you're interested.
>
> Eric Hughes
>
> Jeffrey Vagg - Sun Dallas wrote:
> >
> > Hi,
> >
> > I assume JMS will be the standard way to perfom this. If you use the
> publish/subscribe
> > pattern in JMS it allows for the registration on topics (same as
> Weblogic events).
> >
> > Jeff Vagg
> >
> > >There doesn't seem to be any mechanism in the EJB framework
> > >for doing event dispatching. I'm thinking of the case where several
> > >clients are displaying "live" data (managed ultimately by an entity
> > >bean somewhere). If one of the clients modifies the data, how
> > >can the other clients be notified?
> > >
> > >I imagine most app servers provide some form of event
> > >notification services, but these would be non-standard.
> > >Is there a standard EJB way to handle this?
> > >
> > >We've been testing WebLogic events. The doc implies that
> > >any arbitrary serializable object can be used as message data.
> > >However, we've only been able to get it to work with built-in
> > >objects (e.g. Integer), and not with any of our own objects.
> > >Has anybody any experience in this area?
> > >
> > >Thanks! Michael
> > >
> >
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> >
> >
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> --
> Eric Hughes The MITRE Corporation [EMAIL PROTECTED] 781-271-7486
>
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