Re: [weld-dev] CDI EJB Intergration on Weld

A further question on EJB injection, In the Weld reference doc, performing injection on JavaEE component class: To help the integrator, Weld provides WeldManager.fireProcessInjectionTarget() which returns the InjectionTarget to use. The statement was not mentioned when it talks about performing injection on EJBs. My question is that do we need to call the above method to fire the event.

Another observation with the code snippet on EJB section. It did not mention how the instance was created. I think 'it.produce()' needs to be there before the it.inject(). // Obtain the EjbDescriptor for the EJB // You may choose to use this utility method to get the descriptor EjbDescriptor<?> ejbDescriptor = beanManager.getEjbDescriptor(ejbName); // Get an the Bean object Bean<?> bean = beanManager.getBean(ejbDescriptor); // Create the injection target InjectionTarget it = deploymentBeanManager.createInjectionTarget(ejbDescriptor); // Per instance required, create the creational context CreationalContext<?> cc = deploymentBeanManager.createCreationalContext(bean); *.... missing the line... Object instance = it.produce()* // Perform injection and call initializers it.inject(instance, cc);

Thanks Emily On Fri, May 8, 2015 at 11:29 AM, Emily Jiang <emijiang6(a)googlemail.com <mailto:emijiang6@googlemail.com>> wrote: Thank you Jozef for your helpful response! I have another clarification on the interceptors on JavaEE component classes. EE7 spec states the JavaEE component classes, listed in Table EE.5-1, need to support interceptors. Take servlet for an example, which methods can be intercepted? As the servlet classes are invoked by the container, according to CDI1.2 spec, it seems only service(ServletRequest, ServletResponse) can be intercepted. No other methods can be intercepted. Normally customer applications override doPost or doGet, but they cannot be intercepted. I cannot see any value of support interceptors on Servlet. Anything I missed? Thanks Emily On Thu, May 7, 2015 at 8:22 AM, Jozef Hartinger <jharting(a)redhat.com <mailto:jharting@redhat.com>> wrote: Hi Emily, comments inline. On 05/06/2015 05:38 PM, Emily Jiang wrote: > I have a few questions on ejb integration on Weld. > > 1)Does Weld handle the instance creation for ejb (using > injectionTarget.produce) or delegate the instance creation to > EJB container? I guess Weld will create the instead as it can > manage decorators. If not, how can decorators be managed? > Please confirm. Correct. Weld creates EJB instances using InjectionTarget.produce() > > 2) When Weld creates the EJB instance, how can the other > non-CDI aroundconstruct interceptors (such as the > interceptors defined via ejb-jar.xml or @Interceptors) be > passed in? I found out the WeldCreationContext and > AroundConstructCallback but I cannot find anything mentioned > in the weld reference doc. Is this the right plugin point? Correct, AroundConstructCallback is the API you need to use. The JavaDoc should be helpful. Let me know if anything is not clear. I'll add a note about it to the refdoc. > > 3)If Weld creates the EJB instance, how can all interceptors > (cdi style and ejb style) be invoked? Will the instance need > to be passed back to EJB container together with all CDI > interceptors (get hold of them via > EjbEndpointServiceImpl.java) and EJB container needs to > manage the interceptors being invoked? For interception type other than @AroundConstruct we leave it up to the EJB implementation to handle interception. Information about CDI interceptors is exposed to the EJB implementation via EjbServices.registerInterceptors() > > 4)In Weld spec, it says you must register the > SessionBeanInterceptor as the inner most interceptor in the > stack for all EJBS. Can you clarify what inner most means? > Does this interceptor need to be the first EJB interceptor to > be called or the last EJB interceptor to be invoked? Not sure why it says inner most - it should be outer most instead that is it should be called as first so that the @RequestScope is available for the other interceptors called later in the chain. > > > -- > Thanks > Emily > ================= > Emily Jiang > ejiang(a)apache.org <mailto:ejiang@apache.org> > > > _______________________________________________ > weld-dev mailing list > weld-dev(a)lists.jboss.org <mailto:weld-dev@lists.jboss.org> > https://lists.jboss.org/mailman/listinfo/weld-dev -- Thanks Emily ================= Emily Jiang ejiang(a)apache.org <mailto:ejiang@apache.org> -- Thanks Emily ================= Emily Jiang ejiang(a)apache.org <mailto:ejiang@apache.org>