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forum_thread

Optimistic locking failure

Optimistic locking failure: I am using a Semaphore to force this execution of concurrents transactions T1 and T2 that cause parallel updates to A/B but it does not throw an OptimisticLockException and roll back. ... value=10, B2 version=2 value=30   Sequential=false Lock=WRITE Thread [ Thread-6,5,main ] READ A1 version=1 ...

 
forum_thread

disabling JDO in objectdb embedded mode

Hi, i am using objectdb (version 2.6.8) in embedded mode. I deployed an .ear project in glassfish. When I attempt to call the database I get several exceptions. As an example consider the following short example: ... = false Parent -> ...

 
api-jpa

distinct(distinct)

Specify whether duplicate query results will be eliminated.(Method of javax.persistence.criteria.Subquery)

 
api-jdo

isDetached(pc)

Tests whether the parameter instance has been detached.(Static Method of javax.jdo.JDOHelper)

 
api-jdo

isTransactional(pc)

Tests whether this object is transactional.(Method of javax.jdo.spi.StateManager)

 
api-jpa

MapKeyJoinColumn.unique

(Optional) Whether the property is a unique key.(Annotation Element of javax.persistence.MapKeyJoinColumn)

 
api-jpa

isLoaded(entity)

Determine the load state of an entity belonging to the persistence unit.(Method of javax.persistence.PersistenceUnitUtil)

 
api-jpa

javax.persistence.criteria.AbstractQuery

The AbstractQuery interface defines functionality that is common to both top-level queries and subqueries.(Interface of JPA)

 
api-jpa

isMember(elem, collection)

Create a predicate that tests whether an element is a member of a collection.(Method of javax.persistence.criteria.CriteriaBuilder)

 
api-jdo

makeTransientAll(pcs, useFetchPlan)

Make instances transient, removing them from management by this PersistenceManager.(Method of javax.jdo.PersistenceManager)