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Locking in JPA

rollback">rollback). ObjectDB supports

javax.persistence.EntityManager

>PessimisticLockException will be thrown if the database locking failure causes transaction-level rollback rollback Parameters: entityClass ... locking failure causes transaction-level rollback the LockTimeoutException

JPA Lifecycle Events

an exception within an active transaction, the transaction is marked for rollback and no more callback

ObjectDB Object Database Features

>Operations: begin, commit, rollback.

Step 4: Add a Servlet Class

().rollback(); em.close(); } } @Override protected void doPost

Step 4: Add a Servlet Class

().rollback(); em.close(); } } @Override protected void doPost

javax.jdo.JDOEntityManager

will be thrown if the database locking failure causes transaction-level rollback the rollback Parameters:entityClass - entity

javax.jdo.Transaction

">getRollbackOnly() Returns the rollback-only status of the transaction. Returns the rollback-only status of the transaction. When begun, the rollback-only status is false. Either the application or the JDO

[ODB1] Chapter 6 - Persistent Objects

, if the transaction is ended with rollback() and not with commit()

[ODB1] Chapter 3 - Persistent Classes

when the persistent fields are going to be cleared at transaction end (for example on rollback