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20

"Attempt to lock a non entity object" error

(),       LockModeType.PESSIMISTIC_WRITE); . . } //doEdit ... .persistence.LockModeType; import javax.persistence.Persistence; //---------------- @Entity ... );         em.lock(p, LockModeType.PESSIMISTIC_WRITE);         System.out.println("After find and first lock
14

EntityTransaction.commit() does not release a pessimistic lock

(); Account a1 = em1.find(Account.class, 0, LockModeType.PESSIMISTIC_WRITE); a1.credit(10 ... .getTransaction().begin(); Account a2 = em2.find(Account.class, 0, LockModeType.PESSIMISTIC_READ
10

Duplicate Entity class names causes Exception in Query

(LockModeType.OPTIMISTIC); */ try { java.lang.Object r = q.getSingleResult(); return
10

Optimistic locking failure

problem with LockModeType.READ: Thread[Thread-1,5,main] READ A1 version=1 value=0 Thread[Thread-1,5,main
6

refresh(entity, lockMode, properties)

Method javax.persistence.EntityManager void refresh( Object entity, LockModeType lockMode, Map<String,Object> properties ) Refresh the state of the instance from the database, overwriting changes made to the entity, if any, and lock it with respect to given lock mode type and with specified
6

getLockMode(entity)

Method javax.persistence.EntityManager LockModeType getLockMode( Object entity ) Get the current lock mode for the entity instance. Parameters: entity - entity instance Returns: lock mode Throws: TransactionRequiredException - if there is no transaction IllegalArgumentException - if the instance
6

find(entityClass, primaryKey, lockMode, properties)

Method javax.persistence.EntityManager T find( Class<T> entityClass, Object primaryKey, LockModeType lockMode, Map<String,Object> properties ) Find by primary key and lock, using the specified properties. Search for an entity of the specified class and primary key and lock it with respect
6

setLockMode(lockMode)

Method javax.persistence.Query Query setLockMode( LockModeType lockMode ) Set the lock mode type to be used for the query execution. Parameters: lockMode - lock mode Returns: the same query instance Throws: IllegalStateException - if the query is found not to be a Java Persistence query language SELECT query or a Criteria API query Since: JPA 2.0
6

lock(entity, lockMode)

Method javax.persistence.EntityManager void lock( Object entity, LockModeType lockMode ) Lock an entity instance that is contained in the persistence context with the specified lock mode type. If a pessimistic lock mode type is specified and the entity contains a version attribute, the persistence
2

ObjectDB 2.4.0

classes (issue #672). Fixed LockModeType.OPTIMISTIC (READ) by handling it as OPTIMISTIC_FORCE_INCREMENT. Fixed a bug in optimistic locking on find by using LockModeType.WRITE. Fixed exception

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