[jboss-user] [EJB3] - Re: Why do EJBs share EntityManager instances
Kieran Simpson
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Mon Dec 13 21:59:56 EST 2010
Kieran Simpson [http://community.jboss.org/people/kierans] created the discussion
"Re: Why do EJBs share EntityManager instances"
To view the discussion, visit: http://community.jboss.org/message/575802#575802
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Doing some further digging around, the object that is being injected into the DAOs is an instance of http://grepcode.com/file/repository.jboss.org/nexus/content/repositories/releases/org.jboss.jpa/jboss-jpa-deployers/1.0.0/org/jboss/jpa/tx/TransactionScopedEntityManager.java#TransactionScopedEntityManager.getEntityManager%28%29 org.jboss.jpa.tx.TransactionScopedEntityManager which is located in the jboss-as/common/lib/jboss-jpa-deployers.jar JAR. Looking inside the manifest, the JAR is at version 1.0.0
Looking at the source, it would appear as if the TSEM class should be doing what I thought it should do; that is provide EntityManagers which are only enrolled in the transaction that is currently assigned to the thread.
Still I have no idea why when a transaction is rolled back in one thread all transactions are rolled back. Perhaps this is a transaction management issue rather than an EntityManager problem.
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