Hi, I've been adding osgi integration test on core and I found a classloading problem revolving around cglib enhancer. The main problem is enhancer uses fragment class class loader to create an enhanced class. If the fragment class bundle does not import net.sf.cglib.proxy package, the enhancer will throw a ClassDefNotFoundError exception.
I googled this topic and found interesting discussion: http://groups.google.com/group/spring-osgi/browse_frm/thread/d921aaec07c3a5be/41b387ffde4c715b?lnk=gst&q=cglib&pli=1 I think Stuart's solution to subclass Enhancer and override Enhancer#getClassLoader() would be the way to go. wdyt? Regards, Edward Yakop Potential OSGi future direction: http://www.osgi.org/blog/2007/07/to-declare-or-not-to-declare.html Sample exception: Note: I modified some qi4j core code (not committed), hence it won't match line number of respective classes Caused by: java.lang.RuntimeException: Fail to instantiate [class org.qi4j.service.ServiceComposite$ServiceCompositeMixin] at org.qi4j.runtime.composite.ConstructorsModel.instantiationClass(ConstructorsModel.java:224) at org.qi4j.runtime.composite.ConstructorsModel.<init>(ConstructorsModel.java:51) at org.qi4j.runtime.composite.MixinModel.<init>(MixinModel.java:54) at org.qi4j.runtime.composite.AbstractMixinsModel.implementMethodWithClass(AbstractMixinsModel.java:164) at org.qi4j.runtime.composite.AbstractMixinsModel.implementMethod(AbstractMixinsModel.java:89) at org.qi4j.runtime.composite.MixinsModel.implementMethod(MixinsModel.java:40) at org.qi4j.runtime.composite.CompositeMethodsModel.implementMixinType(CompositeMethodsModel.java:89) at org.qi4j.runtime.composite.CompositeMethodsModel.<init>(CompositeMethodsModel.java:51) at org.qi4j.runtime.composite.CompositeModel.newModel(CompositeModel.java:67) at org.qi4j.runtime.bootstrap.ModuleAssemblyImpl.assembleModule(ModuleAssemblyImpl.java:241) at org.qi4j.runtime.bootstrap.ApplicationFactoryImpl.newApplication(ApplicationFactoryImpl.java:123) at org.qi4j.runtime.bootstrap.ApplicationFactoryImpl.newApplication(ApplicationFactoryImpl.java:84) at org.qi4j.runtime.bootstrap.ApplicationFactoryImpl.newApplication(ApplicationFactoryImpl.java:53) at org.qi4j.bootstrap.Energy4Java.newApplication(Energy4Java.java:60) at org.qi4j.core.test.osgi.internal.Activator.start(Activator.java:48) at org.eclipse.osgi.framework.internal.core.BundleContextImpl$2.run(BundleContextImpl.java:1009) at java.security.AccessController.doPrivileged(Native Method) at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:1003) ... 10 more Caused by: net.sf.cglib.core.CodeGenerationException: java.lang.reflect.InvocationTargetException-->null at net.sf.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:237) at net.sf.cglib.proxy.Enhancer.createHelper(Enhancer.java:377) at net.sf.cglib.proxy.Enhancer.createClass(Enhancer.java:317) at org.qi4j.runtime.composite.ConstructorsModel.instantiationClass(ConstructorsModel.java:217) ... 27 more Caused by: java.lang.reflect.InvocationTargetException 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 net.sf.cglib.core.ReflectUtils.defineClass(ReflectUtils.java:384) at net.sf.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:219) ... 30 more Caused by: java.lang.NoClassDefFoundError: net/sf/cglib/proxy/Factory at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:620) ... 36 more _______________________________________________ qi4j-dev mailing list [email protected] http://lists.ops4j.org/mailman/listinfo/qi4j-dev
