[hibernate-issues] [Hibernate-JIRA] Created: (HHH-6997) Acquiring a lock on merging an entity

Acquiring a lock on merging an entity ------------------------------------- Key: HHH-6997 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-6997 Project: Hibernate ORM Issue Type: New Feature Components: core Affects Versions: 4.0.1 Environment: DB2, Linux, JPA 2, JDK 1.6_29 Reporter: Vincent MATHON I would like to acquire a pessimistic lock after a merge: public T makePersistent(T entity, boolean lock) { T mergedEntity = getEntityManager().merge(entity); if (lock) { em.flush();// sadly enough, this is necessary in case of insert em.lock(mergedEntity, javax.persistence.LockModeType.PESSIMISTIC_READ); } return mergedObject; } I must trigger a flush to avoid an OptimisticLockException (similar to https://hibernate.onjira.com/browse/HHH-4177) if the entity does not exist yet in database.. It is pity that JPA does not allow for locking in the merge method signature... Couldn't Hibernate be smart enough to not throw any exception in the lock method, nor try to select for update if the mergedEntity is flagged as an entity to insert ? -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira