[jboss-user] [EJB/JBoss] - Doing persistence operations in worker threads

[rituraj_tiwari]

Folks,
I am running into a problem where I have come to a dead end after following several leads. 

I am launching an operation asynchronously in a separate thread which gathers some info and then starts persisting some entities. Problem is, I cannot seem to get anything written to the database.

My current approach is to get the EntityManagerFactory and UserTransaction in my worker thread by doing a JNDI lookup:

  |     InitialContext ctx = new InitialContext();
  |     EntityManagerFactory emf = (EntityManagerFactory)ctx.lookup( "java:/MyProjectEntityManagerFactory" );
  |     UserTransaction ut = (UserTransaction)ctx.lookup( "java:comp/UserTransaction" );
  | 
  |     EntityManager em = em = emf.createEntityManager();
  | 

As soon as the last line above is executed,  I see the following message in my JBoss log file:

  | 2008-05-25 01:14:30,093 DEBUG [org.hibernate.impl.SessionImpl] opened session at
  |  timestamp: 4963136594300928
  | 2008-05-25 01:14:30,093 DEBUG [org.hibernate.ejb.AbstractEntityManagerImpl] Looking for a JTA transaction to join
  | 2008-05-25 01:14:30,093 DEBUG [org.hibernate.ejb.AbstractEntityManagerImpl] No JTA transaction found
  | 

All persistent operations seem to work, but nothing gets written to the DB. I see the following log messages in server.log:

  | 2008-05-25 01:21:20,718 DEBUG [org.hibernate.event.def.AbstractSaveEventListener] delaying identity-insert due to no transaction in progress
  | 

Is there anything I can do to start a JTA transaction?

My environment is JBoss 4.2.2 and Seam 2.x

Thanks.
-Raj

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