Re: [wsrf] factory, query

[John Fuller <jfuller@wernervas.com>]

Thinking about how everyone would know the endpoint reference for the 
"factory instances" service group,
the service group EPR could be an ASAP Factory Property...


On Oct 12, 2004, at 9:57 AM, John Fuller wrote:

> In ASAP an observer requests that a factory create service instances.
> Currently we just use URIs for addressing.
>
> The factory knows how to create the instance, what it's been told to 
> create and when it created it.
> The instances themselves can be queried for their properties.
> (In the future, it would be nice to make these WSRF properties).
>
> So, the factory can list the instance ids it's created, but it can't 
> necessarily be expected
> to know about the current state of the instances and end users are 
> likely to want to say
> "give me the instances that are waiting to run or running".
>
> My thought is that in the future, when the factory creates an instance
> the instance could be registered in a service group for instances 
> created by that factory,
> then the service group could be addressed as an endpoint for a query to
> get instance properties which would return a list of instance 
> properties
> from service instances in the group satisfying an optional xpath query 
> filter for instance selection.
>
> Thoughts?
>
>