Re: [sca-assembly] Binding name in the service/reference promotion case

[Simon Holdsworth <simon_holdsworth@uk.ibm.com>]

Raymond,

Good question; It seems a bit odd to
me to have a binding change its name when its parent service is promoted,
however what you would then end up with from an external viewpoint would
be promoted service 2 having binding with name service 1, which also seems
a little odd.

having the name change on promotion
does introduce the possibility of an unpromotable service:

<composite ...>
       <service name="Service2" promote="Component1/Service1">

       <component name="Component1">
                    <service
name="Service1">
                    
           <binding.sca/> <!-- it
can be created implicitly if no bindings are present -->
               
                <binding.ws
name="Service2"/> 
                    </service>
       </component> 
... 
</composite>

This would fail because you'd end up
with two bindings on Service2 with the same name.

For that reason I'd prefer that the
binding name defaults to the name of its parent service (or reference)
element.

Regards, Simon

Simon Holdsworth
STSM, SCA Bindings Architect; Master Inventor; OASIS SCA Bindings TC Chair
MP 211, IBM UK Labs, Hursley Park, Winchester SO21 2JN, UK
Tel +44-1962-815059 (Internal 245059) Fax +44-1962-816898
Internet - Simon_Holdsworth@uk.ibm.com

From:	Raymond Feng <rfeng@us.ibm.com>
To:	sca-assembly@lists.oasis-open.org
Date:	30/09/2009 16:54
Subject:	[sca-assembly] Binding name in the service/reference promotion case

---

Hi,

In a composite as follows:

<composite ...>
       <service name="Service2" promote="Component1/Service1">

       <component name="Component1">
                    <service
name="Service1">
                    
           <binding.sca/> <!-- it
can be created implicitly if no bindings are present -->
                    </service>
       </component> 
... 
</composite>

The binding.sca will get a name "Service1". When it is inherited
by the composite service "Service2", what happens to its name?
Should it be "Service1" or "Service2"? 

Thanks, 
Raymond

---

Raymond Feng
Senior Software Engineer, Apache Tuscany PMC Member & Committer 
IBM Bay Area Lab, 1001 E Hillsdale Blvd, Suite 400, Foster City, CA 94404,
USA
E-mail: rfeng@us.ibm.com,
Notes: Raymond Feng/Burlingame/IBM, Tel: 650-645-8117,
T/L: 367-8117
Apache Tuscany: http://tuscany.apache.org
Co-author of Tuscany In Action: http://www.manning.com/laws

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