Re: [sca-assembly] NEW ISSUE: Provide some way to prevent early binding toglobal domain channels

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Yours, Mike

Dr Mike Edwards
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From:
Eric Johnson <>

To:
OASIS SCA Assembly <>

Date:
07/02/2011 20:24

Subject:
[sca-assembly] NEW ISSUE: Provide some
way to prevent early binding to global domain channels

Title:  Provide some way to prevent early binding
to global domain channels

Target: Assembly 1.2 WD 03

Description:

As currently drafted, producers and consumers can indicate global domain

channels in their @source & @target attributes.

In some scenarios, assemblers will want to prevent the use of said 

references to global domain channels.  For example, an 

assembler/deployer may wish to deploy their composite in conjunction 

with an application provided by a 3rd party. Since the third party is 

unlikely to know the details of the target SCA domain, they cannot 

safely reference global domain channels. To that end, the 

assembler/deployer wants to be sure that no such global domain channels

are referenced by accident.

Currently, there's no specified way for the SCA runtime to enforce such

a constraint.

Proposal:

(Broad strokes:) In section 5.11, add an attribute to the 

implementation.composite element called @allowGlobalRefs (defaults to 

true). When this is set to false, any contained use of @source or 

@target that refers to a global domain channel MUST trigger an error 

when contributed to the domain.

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