Hi Xavier, it comes from the fact you scoped the context (@ApplicationScoped) so openwebbeans needs to generate a proxy in the classloader of jaxb which is probably null there - depends where it is so embedded vs tomee can be important there.
The workaround is trivial: wrap the context in an ApplicationScoped bean or simply use the producer instance (not the produced one) and create the context in @PostConstruct and in the @Produces always return the same instance. This has a nice side effect: it prevents leaks cause classes not belonging in the application and proxied can leak generally cause some of them need to be in the same classloader as the proxied class itself cause of java rules - whatever container it is. That said we can get a better exception on openwebbeans. An alternative fix is probably to override ApplicationBoundaryService of openwebbeans in your application (openwebbeans.properties) but this sounds more fragile than the previous workaround which is safe. Romain Manni-Bucau @rmannibucau <https://twitter.com/rmannibucau> | Blog <http://rmannibucau.wordpress.com> | Github <https://github.com/rmannibucau> | LinkedIn <https://www.linkedin.com/in/rmannibucau> | Tomitriber <http://www.tomitribe.com> 2016-02-16 8:13 GMT+01:00 Xavier Dury <[email protected]>: > Hi Romain, > > You can find my code at https://github.com/kalgon/jaxb-cdi-test > > I've stripped my extension down to the minimum (I removed the scanning and > I am just instantiating an empty JAXBContext). > > It seems that OWB wants to use the JAXBContext ClassLoader (which is null). > > The problem could also come from an incorrect use of the BeanBuilder (but > that extension works well in wildfly, it only fails in my tests with > OpenEJB). > > Thanks, > > Xavier > > ---------------------------------------- > > From: [email protected] > > Date: Mon, 15 Feb 2016 17:36:17 +0100 > > Subject: Re: NPE when creating a bean through Extension and not through > Producer > > To: [email protected] > > > > Hi Xavier, > > > > do you have some code to share - hope google didnt eat any snippet again? > > > > > > Romain Manni-Bucau > > @rmannibucau <https://twitter.com/rmannibucau> | Blog > > <http://rmannibucau.wordpress.com> | Github < > https://github.com/rmannibucau> | > > LinkedIn <https://www.linkedin.com/in/rmannibucau> | Tomitriber > > <http://www.tomitribe.com> > > > > 2016-02-15 16:47 GMT+01:00 Xavier Dury <[email protected]>: > > > >> Hi, > >> > >> I have written a CDI custom extension (with deltaspike BeanBuilder) to > >> scan all types annotated with @XmlRegistry and create one > >> @ApplicationScoped JAXBContext for my application. > >> > >> But beans referencing/injecting that JAXBContext give a NPE when > created: > >> > >> java.lang.NullPointerException > >> at > >> > org.apache.webbeans.proxy.AbstractProxyFactory.defineAndLoadClass(AbstractProxyFactory.java:329) > >> at > >> > org.apache.webbeans.proxy.AbstractProxyFactory.createProxyClass(AbstractProxyFactory.java:240) > >> at > >> > org.apache.webbeans.proxy.AbstractProxyFactory.createProxyClass(AbstractProxyFactory.java:214) > >> at > >> > org.apache.webbeans.proxy.NormalScopeProxyFactory.createProxyClass(NormalScopeProxyFactory.java:269) > >> at > >> > org.apache.webbeans.proxy.NormalScopeProxyFactory.createProxyClass(NormalScopeProxyFactory.java:200) > >> at > >> > org.apache.webbeans.proxy.NormalScopeProxyFactory.createNormalScopeProxy(NormalScopeProxyFactory.java:149) > >> at > >> > org.apache.webbeans.container.BeanManagerImpl.getReference(BeanManagerImpl.java:767) > >> at > >> > org.apache.webbeans.container.BeanManagerImpl.getInjectableReference(BeanManagerImpl.java:668) > >> at > >> > org.apache.webbeans.inject.AbstractInjectable.inject(AbstractInjectable.java:103) > >> at > >> > org.apache.webbeans.inject.InjectableField.doInjection(InjectableField.java:65) > >> at > >> > org.apache.webbeans.portable.InjectionTargetImpl.injectFields(InjectionTargetImpl.java:220) > >> at > >> > org.apache.webbeans.portable.InjectionTargetImpl.inject(InjectionTargetImpl.java:206) > >> at > >> > org.apache.webbeans.portable.InjectionTargetImpl.inject(InjectionTargetImpl.java:196) > >> at org.apache.webbeans.inject.OWBInjector.inject(OWBInjector.java:56) > >> at > >> > org.apache.openejb.testing.ApplicationComposers.enrich(ApplicationComposers.java:949) > >> at > >> > org.apache.openejb.testing.ApplicationComposers.deployApp(ApplicationComposers.java:729) > >> at > >> > org.apache.openejb.testing.ApplicationComposers.before(ApplicationComposers.java:383) > >> at > >> > org.apache.openejb.testing.ApplicationComposers.evaluate(ApplicationComposers.java:1060) > >> at > >> > org.apache.openejb.junit.DeployApplication.evaluate(DeployApplication.java:40) > >> > >> The weird part is that when I create a JAXBContext through a Producer, I > >> don't have this error. > >> > >> I have written 2 test cases with ApplicationComposer (one which creates > >> the JAXBContext through @Produces and the other through an extension) > but I > >> don't know where to report this error as the problem seems to come from > >> openwebbeans but I am using deltaspike and openejb to reproduce it. > >> > >> Hopefully, some people on this mailing list are members of the 3 > projects > >> ;-) > >> > >> Xavier > >> > >
