EJB 3.1 Interceptors

Interceptors implementation can be found where @AroundInvoke annotation is declared. The @Interceptors annotation should be used to say where it could be found the interceptor(s) implementation and to where should be applied (could be at class level or method level).
E.g
@Interceptors(Impl.class)

The method where @AroundInvoke is applied, should have the following signature:
Object <METHOD>(InvocationContext) throws Exception

The @AroundInvoke method should contain a invocationContext.proceed() invocation, in order to allow the execution chain to go on.

A default interceptor can be declared (only at the deployment descriptor file):
<assembly-descriptor>
  <interceptor-binding>
    <ejb-name>*</ejb-name>
    <interceptor-class>actionbazaar.buslogic.ActionBazaarLogger</interceptor-class>
  </interceptor-binding>
</assembly-descriptor>

The default interceptor can be disabled, at the class or method level, using the @javax.interceptor.ExcludeDefaultInterceptors
The class interceptor can be disabled, at the method level, using the @javax.interceptor.ExcludeClassInterceptors