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JPA 2 supports both optimistic locking and pessimistic locking . Locking is essential to avoid ... to pessimistic locking it is easier to use and more efficient. In the rare cases in which update collision must be revealed earlier (before transaction commit) pessimistic locking can be used. When using

Jakarta Persistence (JPA) Enum Constant in jakarta.persistence.LockModeType PESSIMISTIC _READ Pessimistic read lock. Since: Jakarta Persistence (JPA) 2.0

Jakarta Persistence (JPA) Enum Constant in jakarta.persistence.LockModeType PESSIMISTIC _WRITE Pessimistic write lock. Since: Jakarta Persistence (JPA) 2.0

Jakarta Persistence (JPA) Enum Constant in jakarta.persistence.LockModeType PESSIMISTIC _FORCE_INCREMENT Pessimistic write lock, with version update. Since: Jakarta Persistence (JPA) 2.0

adds support for pessimistic locking . The setLockMode method sets a lock mode that has to be applied ... a pessimistic WRITE lock on all the result objects:   List results = query. setLockMode ( LockModeType . PESSIMISTIC _WRITE ) . getResultList (); Notice that when a query is executed

index) - and my test case is failing here. The issue is that once the pessimistic lock is in place ... on stale updates. Willks William Support of  pessimistic lock timeout setting ( javax.persistence ... .ProductCodeTracking:1 I have to stress, that the pessimistically locked entity has a transaction

It appears that EntityTransaction.commit() does not release a pessimistic lock - test code ... .getTransaction().begin(); Account a1 = em1.find(Account.class, 0, LockModeType. PESSIMISTIC _WRITE); a1.credit(10); em1.getTransaction().commit(); System.out.println(em1.getLockMode(a1)); // - PESSIMISTIC

we are protecting object access via pessimistic lock of objects. in a multi thread environment ... The following example shows how pessimistic locking should work in ObjectDB (and JPA): public class F2992 ... . PESSIMISTIC _WRITE); System.out.println("Thread A: got lock, updating..."); e.setName("by A"); Thread

pessimistic lock on an entity instance. The full range of possible lock types is enumerated by LockModeType ... within the persistence context and the lock mode type is pessimistic and the entity has a version attribute ... . If these checks fail, the OptimisticLockException is thrown. If the lock mode type is pessimistic and the entity

Pessimistic lock

, Comparable , Serializable Enumerates the kinds of optimistic or pessimistic lock ... , it must throw the PersistenceException . The lock modes PESSIMISTIC _READ , PESSIMISTIC _WRITE , and PESSIMISTIC _FORCE_INCREMENT are used to immediately obtain long-term database locks. The semantics

DELETE statement. PessimisticLockException - if pessimistic locking fails and the transaction is rolled back. LockTimeoutException - if pessimistic locking fails and only the statement is rolled ... Persistence query language UPDATE or DELETE statement. PessimisticLockException - if pessimistic locking

- if pessimistic locking fails and the transaction is rolled back. LockTimeoutException - if pessimistic locking fails and only the statement is rolled back. PersistenceException - if the query ... for a Jakarta Persistence query language UPDATE or DELETE statement. PessimisticLockException - if pessimistic

the specified options . If a pessimistic lock mode type is specified and the entity contains a version ... is pessimistic and the entity instance is found but cannot be locked: the PessimisticLockException is thrown ... lockMode - lock mode entity - a managed entity instance Throws: LockTimeoutException - if pessimistic

to the persistence context, obtaining the specified lock mode . If a pessimistic lock mode type is specified ... . If the lock mode type is pessimistic and the entity instance is found but cannot be locked ... - if pessimistic locking fails and only the statement is rolled back. PessimisticLockException

properties. If a pessimistic lock mode type is specified and the entity contains a version attribute ... lock. If these checks fail, the OptimisticLockException is thrown. If the lock mode type is pessimistic ... - if pessimistic locking fails and only the statement is rolled back. PessimisticLockException

there. If the entity is found within the persistence context and the lock mode type is pessimistic ... mode type is pessimistic and the entity instance is found but cannot be locked ... - if pessimistic locking fails and the transaction is rolled back. LockTimeoutException - if pessimistic

within the persistence context and the lock mode type is pessimistic and the entity has a version ... is pessimistic and the entity instance is found but cannot be locked: the PessimisticLockException is thrown ... if the entity does not exist. Throws: PessimisticLockException - if pessimistic locking fails

there. If the entity is found within the persistence context and the lock mode type is pessimistic and the entity ... type is pessimistic and the entity instance is found but cannot be locked ... : PessimisticLockException - if pessimistic locking fails and the transaction is rolled back. LockTimeoutException

is pessimistic and the entity has a version attribute, the persistence provider must perform ... , the OptimisticLockException is thrown. If the lock mode type is pessimistic and the entity instance is found ... - if pessimistic locking fails and the transaction is rolled back. LockTimeoutException - if pessimistic

- if pessimistic locking fails and the transaction is rolled back. LockTimeoutException - if pessimistic locking fails and only the statement is rolled back. PersistenceException - if the query execution

.lock.scope property for pessimistic locking. This property may be passed as an argument ... Persistence (JPA) 1.0 NORMAL This value defines the default behavior for pessimistic locking

- since someone can change the object just after the refresh . In that case - use pessimistic locks. support ... - since someone can change the object just after the refresh. In that case - use pessimistic locks ... , so that doesn't help me. Pessimistic locks might not help either, given #3 above, ie: it seems like

I've attached a simple test which creates an object then kicks off several threads which each try to update the object. I'm using a pessimistic lock with timeout as follows: Map properties = new ... .class, 1, LockModeType. PESSIMISTIC _WRITE, properties); One thread manages to do its update

=REFRESH . If the lock mode type is pessimistic and the entity instance is found but cannot be locked ... : PessimisticLockException - if pessimistic locking fails and the transaction is rolled back. LockTimeoutException - if pessimistic locking fails and only the statement is rolled back. EntityNotFoundException

is pessimistic and the entity instance is found but cannot be locked: the PessimisticLockException ... : PessimisticLockException - if pessimistic locking fails and the transaction is rolled back. LockTimeoutException - if pessimistic locking fails and only the statement is rolled back. EntityNotFoundException

. If the lock mode type is pessimistic and the entity instance is found but cannot be locked ... - if pessimistic locking fails and the transaction is rolled back. LockTimeoutException - if pessimistic locking fails and only the statement is rolled back. EntityNotFoundException - if the entity

language UPDATE or DELETE statement. PessimisticLockException - if pessimistic locking fails and the transaction is rolled back. LockTimeoutException - if pessimistic locking fails

. LockTimeoutException - if pessimistic locking fails and only the statement is rolled ... timeout value set and only the statement is rolled back. PessimisticLockException - if pessimistic locking

language UPDATE or DELETE statement. LockTimeoutException - if pessimistic locking fails ... back. PessimisticLockException - if pessimistic locking fails and the transaction is rolled

- if pessimistic locking fails and the transaction is rolled back. LockTimeoutException - if pessimistic locking

DELETE statement. LockTimeoutException - if pessimistic locking fails and only the statement ... back. PessimisticLockException - if pessimistic locking fails and the transaction is rolled back. PersistenceException

query language UPDATE or DELETE statement. PessimisticLockException - if pessimistic locking fails and the transaction is rolled back. LockTimeoutException - if pessimistic locking fails

DELETE statement. PessimisticLockException - if pessimistic locking fails and the transaction is rolled back. LockTimeoutException - if pessimistic locking fails and only the statement is rolled

. LockTimeoutException - if pessimistic locking fails and only the statement is rolled back. NonUniqueResultException ... value set and only the statement is rolled back. PessimisticLockException - if pessimistic locking

Thrown by the persistence provider when a pessimistic locking conflict occurs. This exception

the persistence provider when a pessimistic locking conflict occurs that does not result in

no longer exists in the database. Thrown when EntityManager.lock is used with pessimistic locking is used

Default pessimistic lock timeout hint. Since: Jakarta Persistence (JPA) 1.0 QUERY_TIMEOUT Default

pessimistic locking only? I've tried various xml configurations, and also various transaction ... , that setting is for optimistic locking. My question was about pessimistic locking (specifically, pessimistic write locking). Your documentation seems unclear about that.   dmoshal David Moshal

Jakarta Persistence (JPA) Enum Constant in jakarta.persistence.PessimisticLockScope NORMAL This value defines the default behavior for pessimistic locking. The persistence provider must lock the database row(s) that correspond to the non-collection-valued persistent state of that instance

Jakarta Persistence (JPA) Field in jakarta.persistence.PersistenceConfiguration LOCK_TIMEOUT Default pessimistic lock timeout hint. Since: Jakarta Persistence (JPA) 1.0

; support Support A possible solution (which is currently not implemented) is to use pessimistic locking ... want to use Pessimistic Lock as a way of enforcing a cluster wide singleton of services, a pessimistic ... adds automatic release of pessimistic locks on client-server disconnection. The locks

.getSelectedValue(),       LockModeType. PESSIMISTIC _WRITE); . . } //doEdit ... , LockModeType. PESSIMISTIC _WRITE);         System.out.println ... ;      em.lock(p, LockModeType. PESSIMISTIC _WRITE);     

. Also have the Explorer open Questions: a) what is it about? b) is there a setting for pessimistic mode? In my app ... guess I should read doco more. I ran into the same error from a pessimistically locked entity (global ... on pessimistically tracked entity.   Modified conf file, and got the test case working perfectly.  

. ObjectValue ID:=100, TYPE:=Person, REVISION:=0, isPersisted:=true, LockMode:= PESSIMISTIC _WRITE ... . ObjectValue ID:=100, TYPE:=Person, REVISION:=2, isPersisted:=true, LockMode:= PESSIMISTIC _WRITE

Is it possible to change a LockTimeout for  pessimistic  lock? glaz Alexandr Kurucin Currently ObjectDB throws a LockTimeoutException immediately when a pessimistic lock cannot be granted. Future versions will support timeout setting. You may fill a feature request to increase the priority of this feature.   support Support

Added support of JPA UPDATE and DELETE queries ( issue #12 ). Added support of pessimistic lock timeout ( javax.persistence.lock.timeout ). Added implementation of the getParameters method. Added exception on pessimistic locking retrieval with no active transaction. Improved support of entity

Added JPA XML validation schema files to Maven/JEE objectdb.jar. Added automatic release of pessimistic locks on client-server connection failure. Fixed an OptimisticLockException bug on commit after flushing a removed modified entity object. Fixed a  NullPointerExeption on new index building

O'Hare It seems as a separate issue. Maybe related to pessimistic locking. Can you provide a test