CDI interceptor not fired when JSF managed bean method is invoked

Question

This my interceptor study case, but it doesn't fire.

The annotation for interceptor

import static java.lang.annotation.ElementType.TYPE;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
import java.lang.annotation.Inherited;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;
import javax.interceptor.InterceptorBinding;

@Inherited
@InterceptorBinding
@Retention(RUNTIME)
@Target({METHOD, TYPE})
public @interface LogInterceptor {
}

The Implementation for interceptor

import javax.annotation.Priority;
import javax.interceptor.Interceptor;
import javax.interceptor.InvocationContext;

@Interceptor
@LogInterceptor
@Priority(Interceptor.Priority.APPLICATION)
public class LogInterceptorImpl {
    @AroundInvoke
    public Object log(InvocationContext context) {
        Object o = null;
        try {
            System.out.println("START");
            o = context.proceed();
            System.out.println("END");
        } catch (Exception e) {
            e.printStackTrace();
        }
        return o;
    }
}

The controller

import modelo.Post;
import interceptor.LogInterceptor;
import java.io.Serializable;
import java.util.List;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;

@ManagedBean(name = "postController")
@SessionScoped
public class PostController implements Serializable {

    private List<Post> items = null;
    private Post selected;

    public PostController() {
        MyFacade facade = new MyFacade();
        items = facade.getItems();
    }

    @LogInterceptor
    public List<Post> getItems() {
        return items;
    }
}

The glassfish log

Informações:   EclipseLink, version: Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd
Informações:   file:/C:/Users/f9921257/Documents/NetBeansProjects/estudo/build/web/WEB-INF/classes/_estudoPU login successful
Informações:   Portable JNDI names for EJB PostFacade: [java:global/estudo/PostFacade!facade.PostFacade, java:global/estudo/PostFacade]
Informações:   Portable JNDI names for EJB CategoriaFacade: [java:global/estudo/CategoriaFacade!facade.CategoriaFacade, java:global/estudo/CategoriaFacade]
Informações:   WELD-000900: 2.2.2 (Final)
WARN:   WELD-001700: Interceptor annotation class javax.ejb.PostActivate not found, interception based on it is not enabled
WARN:   WELD-001700: Interceptor annotation class javax.ejb.PrePassivate not found, interception based on it is not enabled
WARN:   WELD-000411: Observer method [BackedAnnotatedMethod] org.glassfish.sse.impl.ServerSentEventCdiExtension.processAnnotatedType(@Observes ProcessAnnotatedType<Object>, BeanManager) receives events for all annotated types. Consider restricting events using @WithAnnotations or a generic type with bounds.
WARN:   WELD-000411: Observer method [BackedAnnotatedMethod] private org.glassfish.jersey.gf.cdi.internal.CdiComponentProvider.processAnnotatedType(@Observes ProcessAnnotatedType<Object>) receives events for all annotated types. Consider restricting events using @WithAnnotations or a generic type with bounds.
WARN:   WELD-000411: Observer method [BackedAnnotatedMethod] public org.glassfish.jms.injection.JMSCDIExtension.processAnnotatedType(@Observes ProcessAnnotatedType<Object>) receives events for all annotated types. Consider restricting events using @WithAnnotations or a generic type with bounds.
Informações:   Inicializando Mojarra 2.2.7 ( 20140610-1547 https://svn.java.net/svn/mojarra~svn/tags/2.2.7@13362) para o contexto '/estudo'
Informações:   Monitoring jndi:/server/estudo/WEB-INF/faces-config.xml for modifications
Informações:   Running on PrimeFaces 5.0
Informações:   Loading application [estudo] at [/estudo]
Informações:   estudo was successfully deployed in 13.298 milliseconds.

The marks "START" and "END" put on LogInterceptorImpl does not appear in the log file. Why they doesn't fire?

Have you checked that System.out is set to output to the server logs? Try adding another System.out in the Controller to verify this. — JamesB, Sep 15 '15 at 22:30
Yes a System.out on the controller was fired but the interceptor's not. — ulima69, Sep 16 '15 at 00:03

score 2 · Accepted Answer · edited May 23 '17 at 12:22

You need to use @javax.inject.Named annotation instead of @ManagedBean:

@Named("postController")
@SessionScoped
public class PostController

Also add @AroundInvoke to mark the interceptor method:

@Interceptor
@LogInterceptor
public class LogInterceptorImpl {
    @AroundInvoke
    public Object log(InvocationContext context) {
        ...
    }
}

And the last step, you need to enable the interceptor in beans.xml, otherwise the interceptor would be ignored:

beans.xml

<beans>
   <interceptors>
      <class>com.nameofyourpackage.LogInterceptorImpl </class>
   </interceptors>
</beans>

Explanation for using @Named instead of @ManagedBean

Both annotations mean essentially the same - they give a textual name to a bean, so that it may be accessed in a JSF page. However, beans marked @ManagedBean are created by the JSF subsystem and CDI annotations are ignored (such as SessionScoped or interceptor qualifiers, such as your LogInterceptor). Beans marked @Named can take full advantage of CDI, while you cannot use JSF specific annotations, like @ManagedProperty (you should use @Inject with CDI). This is not a problem as @ManagedProperty and @ManagedBean are both deprecated and there is always a way how to accomplish the same with CDI. This is discussed in more detail here: Backing beans (@ManagedBean) or CDI Beans (@Named)?

CDI interceptor not fired when JSF managed bean method is invoked

1 Answers1