About commit

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JPA Doc
97

commit()

Method javax.persistence.EntityTransaction void commit() Commit the current resource transaction, writing any unflushed changes to the database. Throws: IllegalStateException - if isActive() is false RollbackException - if the commit fails Since: JPA 1.0
JDO Doc
97

commit()

Method javax.jdo.Transaction void commit() Commit the current transaction. Throws: JDOUserException - if transactions are managed by a container in the managed environment, or if the transaction is not active. Since: JDO 1.0
JDO Doc
97

Constants.PMF_ATTRIBUTE_DETACH_ALL_ON_COMMIT

Static Field javax.jdo.Constants String PMF_ATTRIBUTE_DETACH_ALL_ON_COMMIT The name of the persistence manager factory element's "detach-all-on-commit" attribute. Since: JDO 2.1
JDO Doc
97

Constants.PROPERTY_TRANSACTION_ISOLATION_LEVEL_READ_COMMITTED

Static Field javax.jdo.Constants String PROPERTY_TRANSACTION_ISOLATION_LEVEL_READ_COMMITTED "javax.jdo.option.TransactionIsolationLevel.read-committed" Since: JDO 2.2 See Also: PersistenceManagerFactory.supportedOptions()
JDO Doc
97

Constants.TX_READ_COMMITTED

Static Field javax.jdo.Constants String TX_READ_COMMITTED Transaction isolation level representing the requirement to read committed data only. Since: JDO 2.2 See Also: PersistenceManagerFactory.getTransactionIsolationLevel() Transaction.getIsolationLevel()
JPA Doc
97

FlushModeType.COMMIT

Enum Constant javax.persistence.FlushModeType COMMIT Flushing to occur at transaction commit. The provider may flush at other times, but is not required to. Since: JPA 1.0
JDO Doc
96

Constants.PROPERTY_DETACH_ALL_ON_COMMIT

Static Field javax.jdo.Constants String PROPERTY_DETACH_ALL_ON_COMMIT "javax.jdo.option.DetachAllOnCommit" Since: JDO 2.1 See Also: PersistenceManagerFactory.getDetachAllOnCommit()
Forum
46

Failed to commit transaction: Attempt to commit a rollback only transaction

Anyone know what this means?? Suddenly cropped up. Failed to commit transaction: Attempt to commit a rollback only transaction (error 613) at com.objectdb.jpa.EMImpl.commit(EMImpl.java:271) at javax.jdo.Transaction$commit.call(Unknown Source)   Some fatal exceptions mark an active transaction
Manual
35

Chapter 3 - Using JPA

Explains how to store, retrieve, update and delete entity objects using JPA.
Issue
33

NullpointerException when execute a commit

to commit transaction: Unexpected internal exception at com.objectdb.o.MSG.d(MSG.java:75) at com.objectdb.jpa.EMImpl.commit(EMImpl.java:304) .... Caused by: com.objectdb.o.InternalException: Unexpected ... .EMImpl.commit(EMImpl.java:299) ... 45 more Caused by: java.lang.NullPointerException at com.objectdb.o