Callback Is not working in TUscany 2.0 Beta1

[Urso Wieske <uw...@gmail.com>]

H Folks,

I have earlier submitted an issue via the user mailinglist about the
callback functionality through 'binding.ws'. (webservices)
I have been working on my code for the last couple of days trying to figure
out what the problem is in my code. I came to the conclusion that there was
something wrong with the injection of the callback service in my service's
instance variable.
SCA 1.1 states that the SCA runtime will automatically inject the callback
in my instance variable whenever this variable is annotated with @Callback.
I keep on getting a NullpointerException which indicates that nothing is
being injected. (By the way, my callback reference is declared as a
protected, so it should be sufficient enough for qualifying for injection.
I studied the testsources which were shipped with the codebase of Tuscany
2.0 Beta1. I adapted my source code accordingly to the callback
testexamples. I thought: "This can not go wrong if I apply the same
analogy". I was confident that I would get some working code. :-(
Unfortunately I saw a NullpointerException. I am starting to think that this
has got nothing to do with my own sourcecode, but Tuscany itself. Look for
yourself in the stacktrace below, please:

SEVERE: Exception invoking injector - null
org.oasisopen.sca.ServiceRuntimeException: Exception invoking injector -
null
at
org.apache.tuscany.sca.implementation.java.invocation.JavaImplementationInvoker.invoke(JavaImplementationInvoker.java:208)
at
org.apache.tuscany.sca.core.databinding.wire.DataTransformationInterceptor.invoke(DataTransformationInterceptor.java:86)
at
org.apache.tuscany.sca.core.invocation.RuntimeInvoker.invoke(RuntimeInvoker.java:91)
at
org.apache.tuscany.sca.core.invocation.RuntimeInvoker.invoke(RuntimeInvoker.java:74)
at
org.apache.tuscany.sca.core.assembly.impl.RuntimeEndpointImpl.invoke(RuntimeEndpointImpl.java:286)
at
org.apache.tuscany.sca.binding.ws.jaxws.JAXWSBindingProvider.invoke(JAXWSBindingProvider.java:207)
at
org.apache.tuscany.sca.binding.ws.jaxws.JAXWSBindingProvider.invoke(JAXWSBindingProvider.java:61)
at
com.sun.xml.internal.ws.api.server.InstanceResolver$1.invokeProvider(InstanceResolver.java:245)
at
com.sun.xml.internal.ws.server.InvokerTube$2.invokeProvider(InvokerTube.java:145)
at
com.sun.xml.internal.ws.server.provider.SyncProviderInvokerTube.processRequest(SyncProviderInvokerTube.java:67)
at com.sun.xml.internal.ws.api.pipe.Fiber.__doRun(Fiber.java:587)
at com.sun.xml.internal.ws.api.pipe.Fiber._doRun(Fiber.java:546)
at com.sun.xml.internal.ws.api.pipe.Fiber.doRun(Fiber.java:531)
at com.sun.xml.internal.ws.api.pipe.Fiber.runSync(Fiber.java:428)
at
com.sun.xml.internal.ws.server.WSEndpointImpl$2.process(WSEndpointImpl.java:232)
at
com.sun.xml.internal.ws.transport.http.HttpAdapter$HttpToolkit.handle(HttpAdapter.java:460)
at
com.sun.xml.internal.ws.transport.http.HttpAdapter.handle(HttpAdapter.java:233)
at
com.sun.xml.internal.ws.transport.http.server.WSHttpHandler.handleExchange(WSHttpHandler.java:95)
at
com.sun.xml.internal.ws.transport.http.server.WSHttpHandler.handle(WSHttpHandler.java:80)
at com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:65)
at sun.net.httpserver.AuthFilter.doFilter(AuthFilter.java:65)
at com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:68)
at
sun.net.httpserver.ServerImpl$Exchange$LinkHandler.handle(ServerImpl.java:555)
at com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:65)
at sun.net.httpserver.ServerImpl$Exchange.run(ServerImpl.java:527)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
Caused by: org.apache.tuscany.sca.core.factory.ObjectCreationException:
Exception invoking injector - null
at
org.apache.tuscany.sca.implementation.java.invocation.JavaImplementationInvoker.injectCallbacks(JavaImplementationInvoker.java:235)
at
org.apache.tuscany.sca.implementation.java.invocation.JavaImplementationInvoker.invoke(JavaImplementationInvoker.java:106)
... 27 more
Caused by: java.lang.NullPointerException
at
org.apache.tuscany.sca.core.context.impl.CallbackServiceReferenceImpl.init(CallbackServiceReferenceImpl.java:64)
at
org.apache.tuscany.sca.core.context.impl.CallbackServiceReferenceImpl.<init>(CallbackServiceReferenceImpl.java:47)
at
org.apache.tuscany.sca.core.invocation.impl.JDKProxyFactory.createCallbackProxy(JDKProxyFactory.java:137)
at
org.apache.tuscany.sca.core.invocation.ExtensibleProxyFactory.createCallbackProxy(ExtensibleProxyFactory.java:76)
at
org.apache.tuscany.sca.core.invocation.CallbackWireObjectFactory.getInstance(CallbackWireObjectFactory.java:45)
at
org.apache.tuscany.sca.implementation.java.injection.FieldInjector.inject(FieldInjector.java:62)
at
org.apache.tuscany.sca.implementation.java.invocation.JavaImplementationInvoker.injectCallbacks(JavaImplementationInvoker.java:230)
... 28 more

Any kind of help is appreciated.

Kind regards
Urso