About pessimistic

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Manual
194

Locking in JPA

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
JPA Doc
76

LockModeType.PESSIMISTIC_FORCE_INCREMENT

Enum Constant javax.persistence.LockModeType PESSIMISTIC_FORCE_INCREMENT Pessimistic write lock, with version update. Since: JPA 2.0
JPA Doc
76

LockModeType.PESSIMISTIC_READ

Enum Constant javax.persistence.LockModeType PESSIMISTIC_READ Pessimistic read lock. Since: JPA 2.0
JPA Doc
76

LockModeType.PESSIMISTIC_WRITE

Enum Constant javax.persistence.LockModeType PESSIMISTIC_WRITE Pessimistic write lock. Since: JPA 2.0
Manual
47

Advanced JPA Topics

Describes advanced JPA topics - detached entity objects, lock management and entity lifecycle events.
Manual
45

Setting and Tuning of JPA Queries

. 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
Result
32

ObjectDB Object Database Features

). 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
Forum
28

Pessimistic Lock Timeouts setting

) - 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
JPA Doc
27

javax.persistence.EntityManager

. 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
JPA Doc
26

javax.persistence.LockModeType

pessimistic locks. Optimistic locks are specified using LockModeType.OPTIMISTIC and LockModeType ... call, it must throw the PersistenceException. The lock modes LockModeType.PESSIMISTIC_READ, LockModeType.PESSIMISTIC_WRITE, and LockModeType.PESSIMISTIC_FORCE_INCREMENT are used to immediately obtain long