[jboss-user] [EJB/JBoss] - some newbie quesions about transaction.

liuliu do-not-reply at jboss.com
Fri Aug 22 12:17:39 EDT 2008

hi everyone, 

I have some questions about transaction

1 If the db(informix 7) does not support transaction, the session bean's TransactionAttribute  must to be not_support?If not, it is required by default. i got a RollbackException. 

2 when I test the same method with DefautDS(hypersonic) of JBoss, if TransactionAttribute is not_support, i got exception below, Is it normal?

Exception in thread "main" javax.persistence.TransactionRequiredException: EntityManager must be access within a transaction
  | 	at org.jboss.ejb3.entity.ManagedEntityManagerFactory.verifyInTx(ManagedEntityManagerFactory.java:150)
  | 	at org.jboss.ejb3.entity.TransactionScopedEntityManager.persist(TransactionScopedEntityManager.java:181)
  | ......

3 how can i use these 2 DataSources in one method? I created 2 EntityManager, but there is always an exception because of transaction.

thanks in advance


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