About pessimistic

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JPA Doc
32

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
Forum
31

EntityTransaction.commit() does not release a pessimistic lock

It appears that EntityTransaction.commit() does not release a pessimistic lock -> test code ... (); Account a1 = em1.find(Account.class, 0, LockModeType.PESSIMISTIC_WRITE); a1.credit(10); em1.getTransaction().commit(); System.out.println(em1.getLockMode(a1)); // -> PESSIMISTIC_WRITE
Issue
30

Pessimistic lock timeout - blocks indefinitely

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: MapPESSIMISTIC_WRITE, properties
Forum
26

Pessimistic lock

Pessimistic lock
JPA Doc
18

javax.persistence.TypedQuery

- 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 ... PessimisticLockException - if pessimistic locking fails and the transaction is rolled
JPA Doc
14

lock(entity, lockMode)

. If a pessimistic lock mode type is specified and the entity contains a version attribute ... . If these checks fail, the OptimisticLockException will be thrown. If the lock mode type is pessimistic ... - if the entity does not exist in the database when pessimistic locking is performed
JPA Doc
14

lock(entity, lockMode, properties)

with the specified lock mode type and with specified properties. If a pessimistic lock mode type ... , the OptimisticLockException will be thrown. If the lock mode type is pessimistic and the entity instance is found ... - if the entity does not exist in the database when pessimistic locking is performed
JPA Doc
13

find(entityClass, primaryKey, lockMode)

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
JPA Doc
13

find(entityClass, primaryKey, lockMode, properties)

there. If the entity is found within the persistence context and the lock mode type is pessimistic ... will be thrown. If the lock mode type is pessimistic and the entity instance is found but cannot be locked ... OptimisticLockException - if the optimistic version check fails PessimisticLockException - if pessimistic locking fails
JPA Doc
13

find(entityClass, primaryKey, lockMode, properties)

is pessimistic and the entity has a version attribute, the persistence provider must perform optimistic ... will be thrown. If the lock mode type is pessimistic and the entity instance is found ... OptimisticLockException - if the optimistic version check fails PessimisticLockException - if pessimistic