Seam interceptor for POJO

[dahm]

Hi,

we are NOT using Session Beans in our project, but POJOs annotated with @Name(). Many of those extend the EntityHome bean. Now we'd like to add a simple interceptor to the call
chain that logs invocation times:

import org.jboss.seam.annotations.intercept.AroundInvoke;
import org.jboss.seam.annotations.intercept.Interceptor;
import org.jboss.seam.core.BijectionInterceptor;
import org.jboss.seam.core.ConversationInterceptor;
import org.jboss.seam.ejb.RemoveInterceptor;
import org.jboss.seam.intercept.AbstractInterceptor;
import org.jboss.seam.intercept.InvocationContext;

@Interceptor(stateless = true, around = { BijectionInterceptor.class,
    ConversationInterceptor.class }, within = RemoveInterceptor.class)
public class LoggingInterceptor extends AbstractInterceptor {
  private static final long serialVersionUID = 1L;

  @AroundInvoke
  public Object aroundInvoke(final InvocationContext invocation)
      throws Exception {
    final String methodName = invocation.getMethod().getName();
    final String className = invocation.getTarget().getClass().getName();

    System.err.println("CALLING: " + className + "::" + methodName);
    final long start = System.currentTimeMillis();
    final Object result = invocation.proceed();
    final long end = System.currentTimeMillis();

    final double time = (end - start) / 1000.0;
    System.err.println("CALL took: " + time);

    return result;
  }
}

However it is never being called, unfortunately.
What's wrong with it? Do I have to register the interceptor somewhere with Seam (I found nothing in the docs)?

As you can see it's the right annotation (Not the EJB3 one).

Is there any better way to accomplish some some generic tracing (I guess JBoss interceptors won't work here)?

Cheers
  Markus

[damianharvey.damianharvey.gmail.com]

Tobias Hill posted the code to his Interceptor the other day in this thread. I'm using it with POJOs.

Cheers,

Damian.

[dahm]

Thanks, that's exactly what I need. And it does work!!

My main problem was I thought Seam would handle Interceptors automagically and add them to all components. The workaround
with meta-annotations is not so nice, since it blurs the code
with debugging information.

Maybe that is an issue for a future version...?

[pmuir]

JBSEAM-699

[yk]

Hi,

Is it possible to declare the interceptor in the ejb-jar.xml?

I've created an Interceptor to record the user preferences and declared it in ejb-jar.xml file just after the seam interceptor but  it no longer work!

NB: I've followed the same example as here http://www.michaelyuan.com/blog/2007/07/31/seam-and-soa/

thanks,

[pmuir]

Khaled Yousfi wrote on Apr 01, 2008 01:34 PM:


Is it possible to declare the interceptor in the ejb-jar.xml?

Yes, if it is an EJB interceptor (and thats not a question for this forum).