 244 | 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 |
90 | Enum Constant javax.persistence.LockModeType PESSIMISTIC_FORCE_INCREMENT Pessimistic write lock, with version update. Since: JPA 2.0 |
90 | Enum Constant javax.persistence.LockModeType PESSIMISTIC_READ Pessimistic read lock. Since: JPA 2.0 |
90 | Enum Constant javax.persistence.LockModeType PESSIMISTIC_WRITE Pessimistic write lock. Since: JPA 2.0 |
62 | Describes advanced JPA topics - detached entity objects, lock management and entity lifecycle events. |
55 | . JPA 2 adds support for pessimistic locking. The setLockMode method sets a lock mode ... execution sets a pessimistic WRITE lock on all the result objects:
List results =
query.setLockMode(LockModeType.PESSIMISTIC_WRITE)
.getResultList(); Notice that when a query |
39 | (can be injected to a @Version field). Optimistic locking (always active). Implicit pessimistic locking (JDO). Explicit pessimistic locking (JPA 2). Always Object Level locking. Lock modes: READ/WRITE, OPTIMISTIC/PESSIMISTIC. Database Tools and Utilities ObjectDB provides the following database tools |
33 | ) - and my test case is failing here. The issue is that once the pessimistic lock is in place ... the meantime, I'll use an optimistic lock and fail on stale updates. Support of pessimistic lock timeout ... for com.x.y.z.ProductCodeTracking:1
I have to stress, that the pessimistically locked entity |
33 | context and the lock mode type is pessimistic and the entity has a version attribute, the persistence ... , the OptimisticLockException will be thrown. If the lock mode type is pessimistic and the entity ... OptimisticLockException - if the optimistic version check fails PessimisticLockException - if pessimistic locking |
33 | . If the entity is found within the persistence context and the lock mode type is pessimistic and the entity ... . 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 |