Hello Scott Yes it could have been that I have made the modification in the SCDL (Calcul.composite) and I have replaced the upper case by lowercase 'c' but it doesn't work ...
2008/12/9 Scott Kurz <[EMAIL PROTECTED]> > Fahim, > > I wonder if the problem is the case of your reference in SCDL. > > You have .. > * <reference name="ConversionService" > > *But in the Java impl (CalculatorServiceImpl ) it looks like > the reference name is "conversionService" (lowercase 'c'). > > Maybe try that.... > > Scott > > > > > On Tue, Dec 9, 2008 at 7:41 AM, fahim salim <[EMAIL PROTECTED]> wrote: > >> Hello All >> >> What I'd like to do is to have two components implemented as composite >> (like in simple-bigbank) >> CalculatorServiceComponent is implemented by Calculator.composite and >> ConversionServiceComponent is implemented by Converter.composite >> ConversionService is a reference for CalculatorServiceComponent. >> >> Here is the composite file for this configuration >> >> *<?xml version="1.0" encoding="ISO-8859-15"?> >> <composite xmlns="http://www.osoa.org/xmlns/sca/1.0"; >> targetNamespace="http://calcul"; >> xmlns:ca="http://calculator"; >> xmlns:co="http://converter"; >> name="Calcul"> >> >> <component name="CalculatorServiceComponent"> >> <implementation.composite name="ca:Calculator"/> >> <reference name="ConversionService" >> target="ConversionServiceComponent"> >> <binding.sca/> >> </reference> >> </component> >> >> <component name="ConversionServiceComponent"> >> <implementation.composite name="co:Converter"/> >> </component> >> >> </composite>* >> >> ConversionService offers one method which is *conversionEnEuro()* >> >> *public interface ConversionService { >> public double conversionEnEuro(double value); >> }* >> >> >> >> When I run the application I have the following stack trace error but I >> can't understand what is going wrong. It seems that the proxy which is >> returned doesn't know how to invoke the method of ConversionService but why >> ? >> >> class $Proxy6 >> Caught Exception: null >> java.lang.NullPointerException >> at >> calculator.CalculatorServiceImpl.conversionEnEuro(CalculatorServiceImpl.java:43) >> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) >> at >> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) >> at >> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) >> at java.lang.reflect.Method.invoke(Method.java:585) >> at >> org.apache.tuscany.sca.implementation.java.invocation.JavaImplementationInvoker.invoke(JavaImplementationInvoker.java:132) >> at >> org.apache.tuscany.sca.core.databinding.wire.PassByValueInterceptor.invoke(PassByValueInterceptor.java:112) >> at >> org.apache.tuscany.sca.binding.sca.impl.SCABindingInvoker.invoke(SCABindingInvoker.java:61) >> at >> org.apache.tuscany.sca.core.databinding.wire.PassByValueInterceptor.invoke(PassByValueInterceptor.java:112) >> at >> org.apache.tuscany.sca.core.invocation.JDKInvocationHandler.invoke(JDKInvocationHandler.java:287) >> at >> org.apache.tuscany.sca.core.invocation.JDKInvocationHandler.invoke(JDKInvocationHandler.java:154) >> at $Proxy6.conversionEnEuro(Unknown Source) >> at client.Client.main(Client.java:45) >> >> I have enclosed all the files >> >> Thanks for your help >> >> Fahim >> >> >> >> >> >> >
