Re: [sca-policy] ISSUE-79: Do intents need to be supported if onlyExternal Attachment supported

[ashok malhotra <ashok.malhotra@oracle.com>]

Hi Mike:
If I understand your usecase, the developer sprinkles intents as markers 
in the SCDL.
Then, using External Attachment and the special XPath functions he 
attaches  policySets
based on these markers.

I think this is a bit of a corner case, but we can discuss.

There is another situation, however, that we should discuss.  Suppose I 
say, I will use only External Attachment.
I have no use for intents.  OK.  that's well and good for intents that 
translate to policies but what about
'configuration' intents such as SOAP?   Also, the whole 
mayProvides/alwaysProvides story falls apart if you don't
have intent support.

So, let's discuss.  This needs more thought.

All the best, Ashok

Mike Edwards wrote:
>
> Folks,
>
> A comment on this.
>
> I believe that Intents are completely independent of the mechanism by 
> which PolicySets get attached.
>
> If the runtime only supports ExternalAttachment, then the Intents get 
> used as part of the XPath expression
> for attaching the PolicySets to specific elements in the SCDL.  There 
> are XPath functions described in the
> Policy spec for this purpose.  In other words, the PolicySets can be 
> attached to places where they will
> satisfy specific intents.
>
> As a result, I would say that this issue should be closed with no action.
>
> Yours,  Mike.
>
> Strategist - Emerging Technologies, SCA & SDO.
> Co Chair OASIS SCA Assembly TC.
> IBM Hursley Park, Mail Point 146, Winchester, SO21 2JN, Great Britain.
> Phone & FAX: +44-1962-818014    Mobile: +44-7802-467431  
> Email:  mike_edwards@uk.ibm.com
>
>
> From: 	David Booz <booz@us.ibm.com>
> To: 	sca-policy@lists.oasis-open.org
> Date: 	23/04/2009 21:30
> Subject: 	[sca-policy] ISSUE-79:  Do intents need to be supported if 
> only External Attachment supported
>
>
> ------------------------------------------------------------------------
>
>
>
> _http://www.osoa.org/jira/browse/POLICY-79_
>
> Dave Booz
> STSM, BPM and SCA Architecture
> Co-Chair OASIS SCA-Policy TC and SCA-J TC
> "Distributed objects first, then world hunger"
> Poughkeepsie, NY (845)-435-6093 or 8-295-6093
> e-mail:booz@us.ibm.com
>
> Inactive hide details for ashok malhotra ---04/23/2009 12:10:43 
> PM---Resending with corrected subject All the best, Ashokashok 
> malhotra ---04/23/2009 12:10:43 PM---Resending with corrected subject 
> All the best, Ashok
>
> From: 	
> ashok malhotra <ashok.malhotra@oracle.com>
>
> To: 	
> ashok.malhotra@oracle.com
>
> Cc: 	
> oasIS Policy <sca-policy@lists.oasis-open.org>
>
> Date: 	
> 04/23/2009 12:10 PM
>
> Subject: 	
> Re: [sca-policy] NEW ISSUE: Do intents need to be supported if only 
> External Attachment supported
>
>
> ------------------------------------------------------------------------
>
>
>
> Resending with corrected subject
> All the best, Ashok
>
>
> ashok malhotra wrote:
> > At the start of section 4 we say:
> >
> > SCA runtimes MUST support at least one of the Direct Attachment and
> > External Attachment mechanisms for policySet attachment. [POL40010
> > <#POL40010>]
> >
> > If you look further into External Attachment you find that only
> > External Attachment of policySets is specified.  External attachment
> > of intents is not allowed.  But when you look at POL30024 you find:
> >
> > An SCA Runtime MUST include in the Domain the set of intent
> > definitions contained in the Policy_Intents_Definitions.xml described
> > in the appendix "Intent Definitions" of the SCA Policy specification.
> >
> > Thus, even if you support only External Attachment, you still must
> > include all the intent definitions in the domain.  Does this make sense?
> >
> >
>
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