About PESSIMISTIC_WRITE

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JPA Doc
3

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
3

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
3

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
JPA Doc
3

javax.persistence.Query

- if a lock mode has been set and there is no transaction PessimisticLockException - if pessimistic locking fails and the transaction is rolled back LockTimeoutException - if pessimistic locking ... mode has been set and there is no transaction PessimisticLockException - if pessimistic locking
Forum
3

"Attempt to lock a non entity object" error

(),       LockModeType.PESSIMISTIC_WRITE); . . } //doEdit ... );         em.lock(p, LockModeType.PESSIMISTIC_WRITE);         System.out.println("After find ... ();         // next line throws IllegalArgumentException         em.lock(p, LockModeType.PESSIMISTIC
JPA Doc
3

javax.persistence.PessimisticLockScope

property for pessimistic locking. This property may be passed as an argument to the methods ... the default behavior for pessimistic locking. This value defines the default behavior for pessimistic
JPA Doc
3

refresh(entity, lockMode)

, and lock it with respect to given lock mode type. If the lock mode type is pessimistic and the entity ... PessimisticLockException - if pessimistic locking fails and the transaction is rolled back LockTimeoutException - if pessimistic locking fails and only the statement is rolled back PersistenceException - if an unsupported lock call is made Since: JPA 2.0
JPA Doc
3

refresh(entity, lockMode, properties)

properties. If the lock mode type is pessimistic and the entity instance is found ... - if pessimistic locking fails and the transaction is rolled back LockTimeoutException - if pessimistic locking fails and only the statement is rolled back PersistenceException - if an unsupported lock call is made Since: JPA 2.0
FAQ
3

What are the main benefits of using ObjectDB?

. Less (and more simple) code to write, debug and test, as well as a much easier learning curve leads
Result
3

Eclipse Public License - v 1.0

the Commercial Contributor in writing of such claim, and b) allow the Commercial Contributor