NPersistence Reference Guide
Refresh the state of the instance from the database, overwriting changes made to the entity, if any, and lock it with respect to given lock mode type. If the lock mode type is pessimistic and the entity instance is found but cannot be locked:
  • the PessimisticLockException will be thrown if the database locking failure causes transaction-level rollback
  • the LockTimeoutException will be thrown if the database locking failure causes only statement-level
  • rollback.

Namespace: NPersistence
Assembly: NPersistence (in NPersistence.dll) Version: (


void Refresh(
	Object entity,
	LockModeType lockMode


entity instance
lock mode


System..::..ArgumentException if the instance is not an entity or the entity is not managed
NPersistence..::..TransactionRequiredException if there is no transaction and if invoked on a container-managed EntityManager instance with PersistenceContextType.TRANSACTION or with a lock mode other than NONE
NPersistence..::..EntityNotFoundException if the entity no longer exists in the database
NPersistence..::..PessimisticLockException if pessimistic locking fails and the transaction is rolled back
NPersistence..::..LockTimeoutException if pessimistic locking fails and only the statement is rolled back
NPersistence..::..PersistenceException if an unsupported lock call is made

See Also