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Subject: RE: [wsrf] Singleton Resource Pattern
- From: Steve Graham <sggraham@us.ibm.com>
- To: "Sedukhin, Igor S" <Igor.Sedukhin@ca.com>
- Date: Mon, 12 Jul 2004 14:44:19 -0400
>It seems that whether it is
an "implied resource" or an "implied singleton" has
nothing to do with GetResourceProperty (GetProperty for that sake) operation.
In >other words use of WS-Addressing does not add any semantic value
to the fact that one could retrieve a property by sending a message to
a service.
Unfortunately, I disagree. The
implied resource pattern clarifies a certain pattern relating a web service
and a stateful resource. It is important that this pattern is clarified
to allow a single web service to act as the Web services message processor
for a plurality of stateful resources. Therefore the pattern of the message
is formed to disambiguate which of the potentially many stateful resources
is associated with the message is very important.
sgg
++++++++
Steve Graham
(919)254-0615 (T/L 444)
STSM, On Demand Architecture
Member, IBM Academy of Technology
<Soli Deo Gloria/>
++++++++
| "Sedukhin, Igor S" <Igor.Sedukhin@ca.com>
07/12/2004 11:56 AM
|
To:
Steve Graham/Raleigh/IBM@IBMUS, <wsrf@lists.oasis-open.org>
cc:
Subject:
RE: [wsrf] Singleton Resource Pattern |
Steve,
Your example was interesting.
How about this one:
Web Service implements a UserName
property. Client sends a GetResourceProperty SOAP message with WS-Security
headers containing X.509 certificate. Web Service returns the UserName
after matching the certificate.
-- Is this a singleton or an implied
resource pattern? One could claim that there is a user resource, however
this interaction does not use WS-Addressing and moreover it would not be
possible to build WS-RF qualified EPRs for such interaction.
The same use case could be modified
to include UserDiskQuota property, and the same argument would apply.
It seems that whether it is an
"implied resource" or an "implied singleton" has nothing
to do with GetResourceProperty (GetProperty for that sake) operation. In
other words use of WS-Addressing does not add any semantic value to the
fact that one could retrieve a property by sending a message to a service.
--
Igor Sedukhin
..
(igor.sedukhin@ca.com)
-- (631)
342-4325 ..
1 CA Plaza, Islandia, NY
11788
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