I have just developed an Interceptor that will log @WebMethod calls on a
@WebService annotated @Stateless EJB. I have noticed that if I don't implement
a @Remote interface on my @Stateless session bean, the interceptor is not
invoked on any of the @WebMethods. But I can still call the webservice
correctly. If I do implement the @Remote interface, the interceptor works
correctly with the webservice interface.
Why?
Here are some short class samples (taken from the O'Reilly EJB3.0 book):
@WebService(name = "TravelAgent", serviceName="TravelAgentService")
@Stateless
@SOAPBinding(style=Style.RPC)
// ***
// Comment the following line out and the calls to the
// TravelAgentInterceptor.class in the @Interceptors list
// are never invoked and no failure message is reported
// There is no difference in the behaviour between @Remote
// or "implements TravelAgentRemote" either.
// ***
// @Remote(TravelAgentRemote.class)
public class TravelAgentBean
{
@PersistenceContext(unitName="titan") private EntityManager manager;
@Interceptors(TravelAgentInterceptor.class)
@WebMethod
public void createCabin(@WebParam(name="Cabin")Cabin cabin)
{
manager.persist(cabin);
}
}
@Remote
public interface TravelAgentRemote
{
public void createCabin(Cabin cabin);
}
public class TravelAgentInterceptor
{
@AroundInvoke
public Object intercept(InvocationContext invocationContext) throws
Exception
{
System.out.println(invocationContext.getMethod().getName() + "
called.");
return invocationContext.proceed();
}
}
Any help would be much appreciated. I am hoping to avoid having to define
Remote interfaces that are exact copies of the methods on my stateless
webservice session beans. The @WebService annotation provides an "endpoint
interface" so that I don't have to implement the @Remote interface? Is that
correct?
Thanks!
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