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Forum
23

Optimistic locking failure

Optimistic locking failure: I am using a Semaphore to force this execution of concurrents ... value=20 Thanks. You are right again. To support this, starting build 2.3.7_24 OPTIMISTIC (READ) is implemented as OPTIMISTIC_FORCE_INCREMENT (WRITE). This is allowed by JPA, and is required by
JPA Doc
22

javax.persistence.LockModeType

.setLockMode() or TypedQuery.setLockMode() method. Lock modes can be used to specify either optimistic or pessimistic locks. Optimistic locks are specified using LockModeType.OPTIMISTIC and LockModeType.OPTIMISTIC_FORCE_INCREMENT. The lock mode type values LockModeType.READ and LockModeType.WRITE
Forum
22

Optimistic lock failed : object has version .. instead of ..

.OptimisticLockException Optimistic lock failed for object entities.Record#'1405/838/2011/121' (object ... :381) ... Thank you! Optimistic locking is explained in this manual page. adibe
Forum
22

Remove a modified entity cause an optimistic lock exception

. The second example is an OSGi program which fails with an optimistic lock exception. Both examples ... ). Can you explain the optimistic lock exception? It seems that the first level cache contains yet a dirty entity
Manual
22

Database Management Settings

if optimistic locking is enabled. Optimistic locking is completely automatic and enabled by default
Manual
22

JPA Entity Fields

with optimistic locking (as explained in the Locking in JPA section in chapter 3). You can expose entity ... field is explicitly defined. Therefore, optimistic locking is supported by ObjectDB
Result
22

ObjectDB Object Database Features

Automatic object versioning (can be injected to a @Version field). Optimistic locking (always active ... . Lock modes: READ/WRITE, OPTIMISTIC/PESSIMISTIC. Database Tools and Utilities ObjectDB provides
Forum
22

Optimistic lock

Hello When I get an optimistic lock on an object, refresh(), start trans and persist?  Will the changes made to the object before the violation be retained or must they be duplicated in the retry code?  Assuming it affects only one object.  tia. The exact situation that you describe is unclear
Forum
22

Optimistic locking: prevent version increment on entity collection attribute

Hello, I have an entity E with an attribute which is a collection of entities (one to many relationship) with an optimistic locking strategy supported by a version field. Is it possible to prevent the increment of the version of entity E when entities are added to or removed from the collection
Manual
15

Setting and Tuning of JPA Queries

uses automatic optimistic locking to prevent concurrent changes to entity objects by multiple users