Flush « EntityManager « JPA Q&A





1. JPA - entityManager.flush()    java.net

2. Use pessimistic locking and do "select ... for update" (or similar depending on the particular database). This will put a lock on the row at the time of the query untill commit releases the lock, and the parallel transactions will wait and by the time the lock is released, the flags will be already updated. Now this feature is not ...

2. EntityManager's flush() not writing changes to database    forum.hibernate.org

Hi, I am using jboss(version-4.3.0.GA) with hibernate(hibernate.version>3.2.5.ga, hibernate.entitymanager.version>3.3.2.GA). I have written a small stateless bean to test a scenario with entitymanager and found that flush is not actually writing changes to the database till the transaction commits. ==pseudo code== Code: import javax.ejb.Stateless; import javax.ejb.TransactionAttribute; import javax.ejb.TransactionAttributeType; import javax.persistence.EntityManager; import javax.persistence.PersistenceContext; @Stateless @TransactionAttribute(TransactionAttributeType.REQUIRED) public class TestClass { @PersistenceContext() private EntityManager em; public ...

3. EntityManager Flush with Oracle    forum.hibernate.org