[eclipselink-users] EntityManager and thread safety

[Ben Horowitz <horowitz2@xxxxxxxx>]

Hi,

I have some questions about thread safety and EclipseLink's EntityManager.

I understand that the spec says it's not safe to access an entity manager 
concurrently from multiple threads.

But, supposing that I use synchronized blocks or java.util.concurrent locks as a 
mutual exclusion mechanism to guarantee that no two threads will concurrently 
access the same entity manager or any of the entities it manages: in this case, 
is it safe to access the entity manager and the entities it manages from 
different threads?

I understand that the behavior may be different in EclipseLink vs. other JPA 
implementations.  I'm only asking about EclipseLink.

Thanks a lot,
Ben