Re: [wsdm] WSRF requirements for discovery

[Tom Maguire <tmaguire@us.ibm.com>]

Mark Ellison <ellison@ieee.org> wrote on 05/20/2004 05:30:02 PM:

> Hi,
>
> After listening to the discussion today, it occurs to me that discovery
> (discoverability?) might be usefully described in terms of
> notifications.  This is because I think the same fundamental
> architectural issues are at work when:
>
>       (1) A consumer wishes to subscribe to notifications on a given
topic.
>       (2) A consumer wishes to discover the existence of resources for a
> given type
>             (or, property list, or, attribute set, or, wsdl fragment)
>
> If a ws-r were to emit a notification at instantiation time with a topic
> of "discovery", a reference to wsdl, its known epr and publish within a
> brokered framework, then it would be possible for a consumer to
> subscribe to a"discovery" topic (maybe a subtopic of a ws-r type would
> help here...).  Subject, of course, to security and access rights, etc.

+1 to standardized lifecycle events.  Certainly that would be something
that
we could take to WSRF as a requirement.

> I am assuming that ws-n might support some mechanism for a consumer to
> subcribe to a topic, like "discovery", and be able to obtain the past
> (unique) events on topic.  Such a list should ultimatedly provide the
> discoverability consumer with a list of ws-r eprs, each as reported
> during instantiation by the ws-r itself.
>
> So, how might a structured "discovery" topic be worked into the ws-n
scheme?
>
> Comments?
>
> Regards,
>
> Mark
>
>
>
> John DeCarlo wrote:
>
> >
> > D)  Managed Resource Creation/Deletion Events.  Manageability Consumer
> > is there first.  As each resource is made manageable, an event
> > (containing the EPR in the payload) goes to the Consumer.
> >
> >
>
>
>
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T o m   M a g u i r e

STSM, On Demand Architecture
Poughkeepsie, NY  12601

internet:                 tmaguire@us.ibm.com
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