W3C home > Mailing lists > Public > www-ws@w3.org > January 2002

Asynchronous callbacks + www-ws

From: Arun swaran Jagatheesan <arun@sdsc.edu>
Date: Thu, 24 Jan 2002 14:08:56 -0800
To: "Steven Gollery" <sgollery@cadrc.calpoly.edu>, <www-ws@w3.org>
Message-ID: <MFEEJHEJKMLAHLLLGIDHOEMBCAAA.arun@sdsc.edu>
On the same lines of the previous discussion..

Is there a standard/recommendation for asynchronous callbacks on this
space? - Or is it left to the individual (business) processes to evolve
their own standard for asynchronous callbacks and status monitoring for
long-run services.

Thanks,
Arun.
----------
Dream; because, dreams lead to thoughts; thoughts lead to action, and action
leads to achievement.

Arun swaran Jagatheesan
Mission: GriPhyN (http://www.griphyn.org)
San Diego Supercomputer Center.
(858)822.5452

> -----Original Message-----
> From: www-ws-request@w3.org [mailto:www-ws-request@w3.org]On Behalf Of
> Steven Gollery
> Sent: Thursday, January 24, 2002 1:55 PM
> To: www-ws@w3.org
> Subject: Re: "notification" pattern for web services
>
>
> James,
>
> Thanks for the tip. I just took a look at the NotificationClient in the
> wstk, and I have a couple of follow-up questions (I also left these
> questions on the Alphaworks wstk discussion forum).
>
> It looks like the NotificationClient is also a web service -- am I right
> about that? Is it possible to be a subscriber without also being a web
> service?
>
> Thanks again,
>
> Steve
>
> ----- Original Message -----
> From: "James M Snell" <jasnell@us.ibm.com>
> To: "Steven Gollery" <sgollery@cadrc.calpoly.edu>
> Sent: Thursday, January 24, 2002 10:23 AM
> Subject: Re: "notification" pattern for web services
>
>
> > The IBM Web Services Toolkit version 3.0 release has a sample prototype
> > "Notification Service" that does simple pub/sub messaging.  It is,
> > however, just a first step.  It is available at
> > http://alphaworks.ibm.com/tech/webservicestoolkit
> >
> > - James M Snell/Fresno/IBM
> >     Web services architecture and strategy
> >     Internet Emerging Technologies, IBM
> >     544.9035 TIE line
> >     559.587.1233 Office
> >     919.486.0077 Voice Mail
> >     jasnell@us.ibm.com
> >  Programming Web Services With SOAP, O'reilly & Associates, ISBN
> > 0596000952
> >
> > ==
> > Have I not commanded you?  Be strong and courageous.  Do not be
> terrified,
> >
> > do not be discouraged, for the Lord your God will be with you
> wherever you
> > go.
> > - Joshua 1:9
> >
> > Sent by:        www-ws-request@w3.org
> > To:     www-ws@w3.org
> > cc:
> > Subject:        "notification" pattern for web services
> >
> >
> >
> > In several documents, I've seen references to providing web services
> > that follow the notification (or publish/subscribe) pattern, but I've
> > never seen any sample code. I can see a way to do it using socket
> > connections for the notification, but obviously there are going to be
> > many situations where this won't work.
> >
> > Does anyone know where I can find code implementing a publish/subscribe
> > web service? The scenario I have in mind is: (1) the web service
> > advertises that it can provide information about a given set of topics;
> > (2) clients connect to the web service and subscribe to particular
> > topics; (3) other clients publish information about some topic by
> > sending that information to the web service; (4) the web service sends
> > the information to all the clients that subscribe to that topic. This
> > has to work regardless of whether the clients are behind a firewall, and
> > it would also be nice if there was some way for browser-based clients to
> > participate.
> >
> > If building a publish/subscribe system using just web services is
> > impractical in the general case, I'd also be interested in other ideas
> > that would play well in a system that is primarily based on web
> > services.
> >
> > Thanks in advance,
> >
> > Steven Gollery
> > sgollery@cadrc.calpoly.edu
> >
> >
> >
> >
> >
> >
>
Received on Thursday, 24 January 2002 17:12:05 GMT

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