[ajdt-dev] AspectJ applied to EJBs, JNDI issues / Example TestCase/ pret

["Marco Mistroni" <mmistroni@xxxxxxxxx>]

hello all,
  has anyone ever tried to use AspectJ with EJBs?

Here's my testcase

public aspect SequenceRetrievalAspect {

   private SequenceSessionLocal sequenceSession;

   public SequenceRetrievalAspect() {
      try {
           // can't look it up using JNDI. intercepted bean should have a reference to SequenceSessionBean
          // can't look it up neither using SequenceSession JNDI, since its JNDI is resolved to localhost/cell1/server1/myapp/SequenceSessionLocalHome
         //  and that will make my code host-dependent
      } catch (Exception exc) {
          ....
      }
   }

   pointcut getSequence(DTO dto) :  execution (* com.myapp.ejb.MyBean.methodX(DTO)) && args(dto);


   before(DTO dto) : getSequence(dto) {
     if(dto.getID() == null)
          dto.setID(sequenceSession.getNextIndex());
     }
   }

}


I had plenty of problems in looking up the EJB that needs to be used by the Aspect.
i could not use EJB-REF in the form  java:/comp/env/ejb , not even the full JNDI name
of the EJB, since  my server resolves full jndi name to some sort of     host/cell/server/ plus JNDI Name of the EJB

I ran short of alternatives:
- either write a pointcut that intercept calls to SequenceSession and cache the SequenceSession in the aspect (but this could potentially fail if i need
  to get sequence before even calling SequenceSession..)
- or intercepts calls where EJBs are being put into JNDI tree.....

can anyone suggest me something? 

obviously i coudl avoid using aspects, but in that case i'll need to duplicate the Sequecne retrieval code in all places where i need the sequence

thanks and regards
 marco