[jboss-user] [EJB 3.0] - Implementing an EJB3 Interceptor without touching the projec

Haensel do-not-reply at jboss.com
Thu Apr 5 03:31:11 EDT 2007


my name is Hans-Martin and I am a student at the university of Regensburg, Germany.
I have to hold a lab about EJB3 on JBoss with interceptors. Now I read for about 2 days just to check out how to implement an ejb3 interceptor without touching the project with the business objects (stateless session beans) itself.
By that annotations are no options...or deployment descriptors (ejb-jar.xml), because I have to add them to the project I want to check with my interceptor.

I already worked with ejb2 interceptors, but implementing them was just a piece of cake.
Add you interceptor in the standardjboss.xml file and everything is fine. You don´t have to touch other projects.

But HOW is this possible with EJB3 interceptors ? I added my interceptor to the ejb3-interceptors-aop.xml.
Then I got a ClassDefNotFound Exception at the jboss startup. So I added the jar file with my interceptor to the jboss lib (which can´t be the right way anyway). After that I got a ClassCastException on jboss startup.
But I don´t get the classdefnotfound/classcastexception if I change the scope entry of my interceptor from ?PER_CLASS?/?PER_VM? to ?PER_INSTANCE? within the xml file.

But then the interceptor does not trigger.

I have absolutely no more ideas how to implement ejb3 interceptors without touching the projects which shall be wrapped by the interceptors.

Do you have any ideas ? Or perhaps know a good tutorial or something like this ? I would be more than happy !!!!

Greetings from Germany,


P.s. I am using Jboss 4.0.5 with JbossIde 2.0.0b. , jre:1.5.0_11, JDK: 1.5.0_09

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