Re: [sca-assembly] ASSEMBLY-136: Promoting a reference with multiplicity 1..nand targetsshould default to 0..n - Updated Proposal

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

Hi Mike,

From the PDF:

1) lines 1466-1480 - Is there a formatting problem here or some typos? The paragraph doesn't read well. Seems self contradictory.

2) tables on lines 1484 and 1485 show checks and x's but the table in the doc file shows numbers (4's and 5's)? Looks like 4's are checks and 5's are x's. What's going on here?

3) As far as the technical content goes, it looks like what we talked about. Thanks for writing it up.


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 ---07/29/2009 07:39:41 AM---Folks, Here is a proposal for Issue 136

From:	Mike Edwards <mike_edwards@uk.ibm.com>
To:	"OASIS Assembly" <sca-assembly@lists.oasis-open.org>
Date:	07/29/2009 07:39 AM
Subject:	[sca-assembly] ASSEMBLY-136: Promoting a reference with multiplicity 1..n and targetsshould default to 0..n - Updated Proposal

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Folks, 

Here is a proposal for Issue 136 

Concepts in the proposal: 

1) A component reference can explicitly declare as many targets as are compatible with its multiplicity 

2) When a component reference is promoted, IF the composite reference(s) is configured with at least 1 
target (ie through the component that uses the composite) then the composite reference targets OVERRIDE 
the targets declared on the component reference (ie the component reference targets are not used) 

3) When a component reference is promoted, IF the composite reference(s) has 0 targets configured 
then any targets declared on the component reference are used (ie the declared targets act as default targets) 

4) For x..n component references, it is possible to mark the reference @nonOverridable="true".  In this case, 
the set of targets which are used for the reference is the set configured on any composite references which promote 
the reference PLUS the set of targets declared on the reference itself. 

5) For x..1 component references, @nonOverridable="true" means that the reference cannot be promoted. 

6) To set policy (etc) for "internal" references: 
- use intents 
- or attach policySets using ExternalAttachment 
- or attach policySets directly 
(since they can't be configured at all by promotion) 

7) The default multiplicity of a composite reference is determined by: 
- the multiplicities of the component references it promotes 
- whether (all) the promoted component references have at least 1 target declared 

with the principle being that the multiplicity must be set to ensure that the component references will have 
their multiplicity satisfied - 0..x is allowed for the case where the component reference is 1..x, if there is 
a target declared on (all) the component references. 


I've done the formal proposal as a marked up version of CD03-Rev2 (all changes were accepted BEFORE 
adding the changes for this proposal) 


http://www.oasis-open.org/apps/org/workgroup/sca-assembly/download.php/33566/sca-assembly-1.1-spec-cd03-Rev2%2BIssue136.pdf 
http://www.oasis-open.org/apps/org/workgroup/sca-assembly/download.php/33565/sca-assembly-1.1-spec-cd03-Rev2%2BIssue136.doc 


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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