About pessimistic

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Manual
105

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
78

LockModeType.PESSIMISTIC_FORCE_INCREMENT

Enum Constant javax.persistence.LockModeType PESSIMISTIC_FORCE_INCREMENT Pessimistic write lock, with version update. Since: JPA 2.0
JPA Doc
78

LockModeType.PESSIMISTIC_READ

Enum Constant javax.persistence.LockModeType PESSIMISTIC_READ Pessimistic read lock. Since: JPA 2.0
JPA Doc
78

LockModeType.PESSIMISTIC_WRITE

Enum Constant javax.persistence.LockModeType PESSIMISTIC_WRITE Pessimistic write lock. Since: JPA 2.0
Manual
42

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
30

ObjectDB Object Database Features [2018-01-27]

). 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
Result
30

ObjectDB Object Database Features [2018-10-27]

). 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
Result
30

ObjectDB Object Database Features

(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
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
Issue
26

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