ISSUE 69: Change the normative meaning of Assertion POL40006

[David Booz <booz@us.ibm.com>]

http://www.osoa.org/jira/browse/POLICY-69

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

Mike Edwards ---02/05/2009 09:19:23 AM---Target: SCA Policy Spec sca-policy-1[1].1-spec-CD01-Rev13a.doc Raiser: Mike Edwards

From:	Mike Edwards <mike_edwards@uk.ibm.com>
To:	"OASIS Policy" <sca-policy@lists.oasis-open.org>
Date:	02/05/2009 09:19 AM
Subject:	[sca-policy] [NEW ISSUE] Change the normative meaning of Assertion POL40006

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Target: SCA Policy Spec  sca-policy-1[1].1-spec-CD01-Rev13a.doc 

Raiser: Mike Edwards 

Description: 

[POL40006] currently reads: 

"If the policySet on a <componentType/> has a @provides list that includes an intent 
that is listed in the @provides list of a policySet on the <component/>, the 
componentType policySet MUST be ignored." 

The problem with this is that it is hard for a deployer to be sure what policies actually apply 
to a component or to one of its subelements.  The deployer has to know what policySets are 
in the componentType and then either agree that they are OK, or ensure that each one of them 
is overridden.  This is hard to do for a Domain with a large collection of components. 

It is far simpler to have a rule that says that ANY policySets applied to the component (either by 
direct attachment or by external attachment) override ALL policySets on the componentType. 
Then a deployer just has to assure that each component or component subelement has some 
policySet attached (eg by external attachment rules) and they are done. 

Proposal: 

Change [POL40006] to read as follows: 

"If a component has any policySets attached to it (by any means), then any policySets attached 
to the componentType MUST be ignored" 


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

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