[Ace-users] [tao-users] About POA Manager in TAO
Douglas C. Schmidt
schmidt at dre.vanderbilt.edu
Wed Dec 19 17:48:58 CST 2007
> Sorry Doug, I replyied to your answer and I didn't note that I was replying directly to you.
> What I need is to buffer the request sent to an object so I can postergate
What does it mean to "postergate"? Do you mean "postpone"?
> the delivery of the requests to the object. I was hoping that someone
> had an advice about what to use to do that.
It sounds to me like CSD might be a good thing to try.
> 2007/12/18, Douglas C. Schmidt <schmidt at dre.vanderbilt.edu>:
> Hi Santos,
> > Thank you for your answers. I would appreciate if you can help me with an advice about a related question:
> Sure, but please send all questions about TAO to the tao-users mailing
> list, not to me directly.
> > If I need to queue the requests sent to a object in order to invoke
> > them in the future, what would be the appropriate way to do that? Is
> > CSD a good option or is there a better way?
> It's not clear wha tyou mean by "queue the requests sent to an object in
> order to invoke them in the future." Please explain what you're trying
> to do. Moreover, I recommend you take a look at the various CSD
> examples in the TAO release. If you haven't gotten a copy of the OCI
> TAO Developer's Guide that's another good place to learn more about this
> > Thank you again.
> > Santos
> > 2007/12/17, Douglas C. Schmidt < schmidt at dre.vanderbilt.edu>:
> > Hi Steve,
> > >> Ok, so does this imply that the CSD mechanism runs "atop" the POA? Put
> > >> another way, what is the architectural relationship between CSD and the
> > >> POA?
> > >
> > >It uses the Strategy pattern. The POA delegates the
> > >dispatching of requests to the CSD strategy object.
> > Aha, now I get it.
> > >>> The thread-pool CSD strategy (TP_Strategy) that comes with TAO
> > >>> as a reference implementation does queue requests for processing
> > >>> by threads in the thread pool. I don't believe there is any
> > >>> defined upper limit to the number of requests that can be queued.
> > >>
> > >> Cool - it would be nice if we could figure out how to integrate CSD with
> > >> the POA such that the HOLDING state would queue requests!
> > >
> > >That was not the intent of the original sponsor of CSD.
> > Ok, so it sounds like adding support for this feature should be put on
> > the "wish list" for future sponsors ;-)
> > Thanks,
> > Doug
> > --
> > Dr. Douglas C. Schmidt Professor and Associate Chair
> > Electrical Engineering and Computer Science TEL: (615) 343-8197
> > Vanderbilt University WEB: www.dre.vanderbilt.edu/~schmidt
> > Nashville, TN 37203 NET: d.schmidt at vanderbilt.edu
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