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Re: [Pub-Sub-Task] Re: Some thoughts on wsdl pub/sub

From: Joyce Yang <joyce.yang@oracle.com>
Date: Thu, 31 Oct 2002 16:46:54 -0800
Message-ID: <3DC1CEFE.8857BBA4@oracle.com>
To: Sanjiva Weerawarana <sanjiva@watson.ibm.com>
CC: "WS-Desc WG (Public)" <www-ws-desc@w3.org>

n the 80-20 rule, I'm not sure the "80" is on the no-ack case.
I think most subscription will need an ack.

-Joyce
Sanjiva Weerawarana wrote:

> On Thu, 2002-10-31 at 13:52, Joyce Yang wrote:
> > I'm not a fan of existing outbound operations, but I do see
> > them make the pub/sub modeling much easier and maybe
> > more close to the original idea of outbound operations. The
> > syntax Sanjiva proposed is very attractive (inline below),
> >
> >       <portType name="pt1">
> >             <operation name="normal-op1"> ... </operation>*
> >             <event name="event-1">
> >                   <subscription message="subscription-message"/>
> >                   <notification message="notification-message"/>
> >             </event>
> >       </portType>
> >
> > however, it's not sufficient, we will have to invent many more
> > constructs to catch the concepts on whether the "subscription"
> > is with ack, and the "notification" is with ack or not. We
> > definitely can add a new "ack" attribute to <subscription>
> > and <notification> to serve the needs, but aren't they modeled
> > very naturally by two outbound operations as mentioned in my
> > proposal? But overall, I'm glad we are conceptually trying
> > to solve the same problem.
>
> I agree there are different variations possible as you noted.
> My approach to this kind of stuff is to take the most simple
> scenario and address that and see whether its enough. We can of
> course add whatever cases we want, but IMHO we should go for the
> 80-20 case only and live with that. Other more complicatated
> scenarios are left to extensibility.
>
> So my preference would be to pick the following choices:
>     - subscriptions are not ack'ed by the event source
>     - notifications are not ack'ed by the event sync
>
> Sanjiva.
Received on Thursday, 31 October 2002 19:48:04 GMT

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