Grouper Developers Forum

[Tom Barton <>]

Indeed, issues such as these will be broached by someone getting into 
the details of making asynchronous messaging work. I think it would be 
fun, instructive, and timely if that discussion was grounded by an 
actual deployment attempt.

But no pressure, Caleb! :-)

Chris Hyzer wrote:
> Not to derail the request for an example, but I would like to discuss the 
> architecture at some point as well...
>
> Are we assuming that we still need a queue in the Grouper DB, then a daemon 
> to retrieve items from that and send to messaging?  We would want messaging 
> reliable even if the ActiveMQ is down for a bit, right?  And we would want it 
> to be transactional with the Grouper transaction (e.g. if the Grouper tx is 
> committed, we definitely want a message, and if not, we definitely don't.  
> Also we need to make sure the order of messages is consistent with the order 
> of operations against the Grouper DB which can happen based on disparate 
> systems (UI, GSH, WS, etc)
>
> ActiveMQ does look like a nice product though...
>
> Thanks,
> Chris
>
> > -----Original Message-----
> > From: Tom Barton 
> > [mailto:]
> > Sent: Thursday, September 04, 2008 1:29 PM
> > To: caleb racey
> > Cc: Grouper Dev
> > Subject: Re: [grouper-dev] Action Items: Grouper Call 3-Sep-08
> >
> > Caleb,
> >
> > It would be great to get feedback from an effort to use hooks by those
> > outside of the development team. It would also be great to have an
> > actual example of sourcing group management events into a message-based
> > system. Let us know if you need any help.
> >
> > Tom
> >
> > caleb racey wrote:
> > > > [AI] {Kathryn} will do background research on a messaging system to
> > > > be used as a test/example case for hooks.
> > > I have just been testing activeMQ JMS message queuing  and have also
> > been testing it with the STOMP protocol connector to provide access to
> > JMS queues to other languages (php perl python ruby etc)  with php
> > message consumption and posting tested.
> > > More than happy to help with this effort and I can recommend activeMQ
> > as a test platform, I had it setup and running in about 30 minutes and
> > it has nice examples to learn from.
> > >

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