Re: [sca-assembly] ISSUE 39 (was ISSUE 47:Operation element for Interface)

This callback issue has a similar impact
on issue 39 (unfortunately already resolved).  This allows the conversational
intent to be applied to an interface.  It does not consider the case
where the forward direction is conversational but not the callback, or
vice versa.

I believe it is necessary to reopen
issue 39 to deal with this (or create a new issue).  Any other insights
or opinions would be most welcome.

    Simon

Simon C. Nash, IBM Distinguished Engineer

Member of the IBM Academy of Technology

Tel. +44-1962-815156  Fax +44-1962-818999

Bryan Aupperle <>

02/06/2008 18:24

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cc

Subject

[sca-assembly] ISSUE 47:Operation element
for Interface

Upon further reflection o this issues, the original proposal is not sufficient.

Suppose a service is bidirectional and both the forward and callback interfaces
have a cancel method that need to be denoted as endsConversation
in the SCDL.  A single operation child element is not sufficient to
handle this case.  We need operation and callbackOperation child elements;
each with the name, oneWay and endsConversatioon attributes described in
the original proposal. 

Note  that I am not suggesting a complete replication of the interface
definition,  Only those operations that need the SCA attributes would
need to be listed in the SCDL. 

When we discussed opening this issues, the question was raised if we could
extend the existing operation child element of service and reference instead
of adding an operation element to interface.   It seems more natural
to me to have operations belong to interfaces.  However, if we go
that direction, we still have to address the callback problem above.

Bryan Aupperle, Ph.D.

STSM, WebSphere Enterprise Platform Software Solution Architect

Master Inventor

Research Triangle Park,  NC 

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