[NEW ISSUE] Need for a Callback annotation for WSDL interface files

Raiser:        
        Mike Edwards

Target:        
       SCA Assembly Specification

Description:

(Arose from discussions in the Bindings
TC)

It is noted that for a service with
a callback, if it is defined using a Java interface, there is a @Callback
annotation which

allows the fact that the forward service
interface has a related callback interface to be captured in the definition
of the interface.

However, if the interface is defined
using a WSDL interface, there is no equivalent function.  

It would be very useful if it were possible
to annotate a WSDL interface in such a way that the forward interface could
be

annotated with a pointer indicating
that there is a callback interface and pointing at that interface.

Proposal:

(General direction)

Since WSDL is extensible, use that extensibility
to annotate a WSDL 1.1 portType, either via an new attribute or via a 

new child element, which is labelled
"callback" and which has a value that is the QName of a second
portType which

declares the callback interface.

Yours,  Mike.

Strategist - Emerging Technologies, SCA & SDO.

Co Chair OASIS SCA Assembly TC.

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