getEJBLocalObject, CMR, ejbPostCreate, and Reentrant method

[tomerbd]

Hi

I have two entity beans.
they have a CMR (bidirectional) one to one.

In entity1 ejbPostCreate im creating an entity2 and assigning entity1 to it like this pseudo code

class Entity1Bean {

 ejbPostCreate(...) {
 // Every time I create entity1 entity2 should be created and point to entity 1.
 entity2Home.create((Entity1) entityContext.getEJBLocalObject());
 }

}

I receive an exception for that :

javax.ejb.EJBException: Reentrant method call detected for User 1: The same thre
ad reentered: thread-holder=Thread[RMI TCP Connection(82)-10.10.1.80,5,RMI Runti
me], holding tx=TransactionImpl:XidImpl [FormatId=257, GlobalId=WS-TBENDAVID//18
03, BranchQual=], current tx=TransactionImpl:XidImpl [FormatId=257, GlobalId=WS-
TBENDAVID//1803, BranchQual=]
 at org.jboss.ejb.plugins.EntityReentranceInterceptor.invoke(EntityReentr
anceInterceptor.java:108)
 at org.jboss.ejb.plugins.EntityInstanceInterceptor.invoke(EntityInstance
Interceptor.java:175)
 at org.jboss.ejb.plugins.EntityLockInterceptor.invoke(EntityLockIntercep
.
.
.

What can I do to overcome this?

[aloubyansky]

You are probably invoking some methods on Entity1 in Entity2's ejbCreate or ejbPostCreate.

10.5.11 Non-reentrant and re-entrant instances
...If an instance of a non-reentrant
entity bean executes a client request in a given transaction context, and another request with the
same transaction context arrives for the same entity object, the container will throw an exception to the
second request..."

If you need to have Entity1's CMP field values in Entity2's ejbCreate or ejbPostCreate you should pass them as parameters to Entity2's ejbCreate and ejbPostCreate.

[tomerbd]

Well, in ejb2 create/postCreate im not calling ejb1 (but my guess would be that jboss is calling it under the hoods...) the code looks like this

ejb2.create(ejb1)

and in ejb2 create method

setOwner(ejb1)

so is there generaly a way to pass ejb1 to ejb2 and in ejb2 setting setOwner(ejb1) without having reentrant methods?

[aloubyansky]

This works for me.
In entity A:

public void ejbPostCreate(Long id, String name)
 {
 try
 {
 CUtil.getLocalHome().create((ALocal)ctx.getEJBLocalObject());
 }
 catch(Exception e)
 {
 e.printStackTrace();
 }
 }

In entity C:

public Long ejbCreate(ALocal a)
 throws CreateException
 {
 setId(new Long(11));
 return null;
 }

 public void ejbPostCreate(ALocal a)
 {
 setA(a);
 }

What version are you using?

[aloubyansky]

And post the stacktrace.

[tomerbd]

You are right. I gave it another shot and it seems to be working fine!