ProcessInjectionPoint.setInjectionPoint() doesn't work in some environment.

[bingochen]

My project use weld-se-core and weld-servlet-core that version is 3.0.5.Final. I use undertow(eagerFilterInit=true) as project servlet container. I have some servlets that were injected some services. The CDI injection are available in Servlets, Filters and Listeners, but the ProcessInjectionPoint.setInjectionPoin()  doesn't work on servlet's  injection point, but work fine on the other beans.

The code snippet is as follows:

class SomeExtension implements Extension{

     void onProcessInjectionPoint(@Observes ProcessInjectionPoint<?, ?> pip, BeanManager beanManager) {

          //...

          pip.setInjectionPoint(new SomeInjectionPoint()); // this was work fine in common beans, but doesn't work on the servlet injection, use configureInjectionPoint().addQualifiers()  is similar.

     }

}

@ApplicationScoped

@WebServlet(urlPatterns = "/some")

public class SomeServlet extends HttpServlet {

     @Inject

     SomeService someService; // in this inject, I add some additional qualifiers, but it doesn't work.

}

@ApplicationScoped

public class SomeService  {

     @Inject

     OtherService otherService; // in this inject, I add some additional qualifiers,  it work fine. use same Extension observes method.

}

M

Who can tell me why, or what I'm missing?

[manovotn]

Hello,

the catch here is that what you expect to work is basically unsupported. CDI spec speaks of some core behaviour, EE environment and (since 2.0) SE environment. Not servlets though, so what Weld offers in that regard is beyond specification.

To point to the spec, firstly there is a chapter that ProcessInjectionPoint should be fired for every bean, interceptor and decorator.

Later on there is another chapter that expands this rule to apply to EE component classes while in EE environment which might have confused you.

That being said, it may not be impossible to implement this behaviour, feel free to create a Weld JIRA so this idea doesn't get lost. Or better still, send a PR ;-)

[bingochen]

Thanks your response, I will post it to Weld JIRA