[jboss-user] [EJB 3.0] - Re: Share entity bean between stateless session beans

[Wolfgang Knauf]

Hi,

according to the ejb persistence spec (chapter 3.2.4):

anonymous wrote : A detached entity may result from transaction commit if a transaction-scoped container-managed entity manager is used (see section 3.3); from transaction rollback (see section 3.3.2); from clearing the persistence context; from closing an entity manager; and from serializing an entity or otherwise passing an entity by value, e.g. to a separate application tier, through a remote interface, etc.

Does any of those cases apply to your app? You have the special case that the EntityManager is only in "Bean1", so I don't know whether calling a method from "Bean2" means that the persistence context is cleared afterwards.

Here is something from chapter 5.6.1, but this does not make it much clearer:
anonymous wrote : A new persistence context begins when the container-managed entity manager is invoked in the scope of an active JTA transaction, and there is no current persistence context already associated with
  | the JTA transaction. The persistence context is created and then associated with the JTA transaction.
  | 
  | The persistence context ends when the associated JTA transaction commits or rolls back, and all entities that were managed by the EntityManager become detached.
  | 
  | If the entity manager is invoked outside the scope of a transaction, any entities loaded from the database will immediately become detached at the end of the method call.

Hope this helps a bit

Wolfgang

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