CDI interceptor not fired when JSF managed bean method is invoked - jsf

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?

Answer 1

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)?