Re: [sca-assembly] NEW ISSUE: (1.2) Must a global domain channel bedeployed before it can be used?

Eric

You said..

Neither of the above indicate whether or not the global
domain channel 

can be used before it is referenced.

I'm not sure how you can "use"
a channel without referencing it (I assume "reference" means
"wire to/from"), but I think the question you are asking is the
one in the title - "can you reference a channel that hasn't been defined
to the SCA assembly?". I  think this is one place where the current
spec is clear.. you can't reference a domain channel that hasn't been defined.

So it looks as though your issue is
to say that we should change the spec to say that it permits (in fact requires)
autocreation of domain channels.  Presumably these channels would
have to be created with default attributes (though I know you think they
shouldn't have attributes at all).

Regards

Peter Niblett

IBM Senior Technical Staff Member

Member of the IBM Academy of Technology

+44 1962 815055

+44 7825 657662 (mobile)

From:      
 Eric Johnson <>

To:      
 OASIS SCA Assembly
<>

Date:      
 31/01/2011 17:19

Subject:    
   [sca-assembly]
NEW ISSUE: (1.2) Must a global domain channel be deployed before it can
be used?

Title: Must a global domain channel be deployed before
it can be used?

Target: Assembly 1.2 WD 03

Description:

Via the "@target" and "@source" attributes defined
on a consumer & 

producer, the assembler can reference global domain channels.

In section 5.8, the presumed to be normative text reads "SCA runtimes

MUST support the use of domain channels [ASM????]."  That is
followed by:

"To create a Domain Channel, deploy a composite containing a channel

directly to the SCA Domain (i.e., do not use that composite as the 

implementation of some component in the Domain)."

Neither of the above indicate whether or not the global domain channel

can be used before it is referenced.

Proposal:

General theme: do not require the global domain channel to exist before

it can be used.

Specific text (needs refinement?):

In section 5.8, Paragraph #2, append:

When contributing artifacts to a domain that contain references to 

global domain channels that have not been created, the SCA runtime MUST

automatically create said global domain channels, and cannot reject such

contributions [ASM????].

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