On Sep 30, 2006, at 6:10 AM, Ignacio Silva-Lepe wrote:
Ok, I took a look. Fixing CompositeReference to not be interface/
method centric is not a big deal. However
CompositeReferenceTargetInvoker and
CompositeReferenceCallbackTargetInvoker are defined in terms of
PojoTargetInvoker which itself is interface/method centric. Given
the current architecture, and the fact that CompositeReference and
CompositeService are intended for local use, it seems fair to
assume a dependency on PojoTargetInvoker.
If this is the case, then the fix will not work because
WSDLServiceContract for instance, even though it extends
ServiceContract, does not set its interfaceClass or callbackClass,
hence the NPE. So, under this assumption, either
WSDLServiceContract would need to set its interfaceClass and
callbackClass (which seems hard to do), or CompositeReference and
CompositeService, which represent bindless reference and service
respectively, should not use WSDLServiceContract, i.e., bindless
references and services should not use <interface.wsdl>.
If this is not the case, for which would it be interesting to see
the justification, then a different way of invoking
CompositeReferences and CompositeServices would need to be used,
one that does not rely on java reflection.
Thoughts?
One of the fundamental concepts in SCA is the ability to specify
service contracts in a variety of IDLs. It absolutely must be
possible to express services and references in WSDL (or Java or CORBA
IDL or ...) - basically the user should be free to use the IDL that
is easiest for them and not be constrained by the infrastructure.
I can see why PojoTargetInvoker would use reflection as it is
responsible for dispatching an invocation into a POJO and the only
way to do that is through some form of reflective invoke.
I don't see why that would apply to a CompositeReferenceTargetInvoker
- it's job AIUI is not to invoke a Java component but to flow the
invocation onward to what it is wired to. That is not something that
it needs an (expensive) reflective call to do - it can just forward
the invocation.
--
Jeremy
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