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From "Matthieu Riou" <>
Subject Entity manager injection
Date Fri, 02 Mar 2007 16:32:19 GMT

For ODE we're managing our transactions ourselves. We start them and commit
them explicitly. By the same token we create the EntityManagerFactory
ourselves. Is there a possibility to use the EntityManager injection in the
persistent classes in this context or do we have to implement our own
ThreadLocal based thingy to have the EM available in our persistent classes
using it?

I've tried doing something like:

1. Adding "@PersistenceContext  private EntityManager _em;" in a persistence
2. Load the persistence class from an EntityManager created with the
3. Use _em in my persistent class
       => NullPointerException


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