MFD> Issue to resolve before PWG wide Last Call of Scan spec

MFD> Issue to resolve before PWG wide Last Call of Scan spec

MFD> Issue to resolve before PWG wide Last Call of Scan spec

Ira McDonald blueroofmusic at gmail.com
Thu Aug 28 12:18:01 EDT 2008


Hi Pete,

I agree that your alternative 2 (add service names to operation names in a
single PWG namespace) is much better.

Cheers,
- Ira

On Thu, Aug 28, 2008 at 9:50 AM, Zehler, Peter <Peter.Zehler at xerox.com> wrote:
> All,
>
>
>
> I have come across a small issue in some of my prototyping of Scan, Print
> and Resource when trying to co-locate them on a single port.  The issue is a
> result of moving to a single namespace for all of the MFD.  In a SOAP
> binding using document/literal encoding, messages are dispatched using the
> SoapAction or the message name in the body of the request.  The implication
> here is that all operations across the MFD services must have a unique name
> or they need to be differentiated by namespace.   Differentiating service
> operations by namespace changes the fully qualified name of the operations.
>
>
>
> We have common administrative operations such as Pause and Resume.  We also
> have some common service specific operations such as CreateJob that share a
> name but differ in the contents of the parameters.
>
>
>
> Possible solutions:
>
> 1)       Change back to multiple namespace approach putting each service in
> its own namespace.
>
> 2)       Modify the operation names to include the name of the service in
> all operations.
>
>
>
> Proposed solution:
>
> I prefer alternative 2.  Alternative 1 will cause some extensibility point
> issues and complicates the structure of the WSDL and schemas.  There is some
> mapping that needs to be done with solution 2 and deployed Web Services
> (e.g. WS-Scan).   I see no problem with that since a mapping is required
> even if the unqualified operation names are aligned.  The mapping required
> is trivial.
>
>
>
> If there is no objection, I will make the change before moving to PWG wide
> Last Call.  If anyone wishes to discuss this at a teleconference I can delay
> sending the document for PWG wide Last Call.  Please send me a note this
> week if you to discuss this further.
>
>
>
> Comments?
>
>
>
> Pete
>
>
>
> Peter Zehler
>
> Xerox Research Center Webster
> Email: Peter.Zehler at Xerox.com
> Voice: (585) 265-8755
> FAX: (585) 265-7441
> US Mail: Peter Zehler
> Xerox Corp.
> 800 Phillips Rd.
> M/S 128-25E
> Webster NY, 14580-9701
>
>



-- 
Ira McDonald (Musician / Software Architect)
Chair - Linux Foundation Open Printing WG
Blue Roof Music/High North Inc
email: blueroofmusic at gmail.com
winter:
 579 Park Place Saline, MI 48176
 734-944-0094
summer:
 PO Box 221 Grand Marais, MI 49839
 906-494-2434



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