Fahim, So I'd expect you're getting a different error now after switching the SCDL to: * <reference name="conversionService" * Is that correct? What's the new error?
Scott On Tue, Dec 9, 2008 at 10:53 AM, fahim salim <[EMAIL PROTECTED]> wrote: > 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 >>> >>> >>> >>> >>> >>> >> >
