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Manual
106

Locking in JPA

supported pessimistic lock modes are: PESSIMISTIC_ READ - which represents a shared lock. PESSIMISTIC_WRITE ... cannot be granted: A PESSIMISTIC_ READ lock request fails if another user (which is represented by ... a PESSIMISTIC_ READ lock on that database object. For example, consider the following code fragment: em1
JDO Doc
60

PersistenceCapable.CHECK_READ

Static Field javax.jdo.spi.PersistenceCapable byte CHECK_ READ If jdoFieldFlags for a field includes CHECK_ READ, then the field has been enhanced to call the jdoStateManager on read if the jdoFlags setting is not READ_OK or READ_WRITE_OK. Since: JDO 1.0
JDO Doc
58

PersistenceCapable.MEDIATE_READ

Static Field javax.jdo.spi.PersistenceCapable byte MEDIATE_ READ If jdoFieldFlags for a field includes MEDIATE_ READ, then the field has been enhanced to always call the jdoStateManager on all reads. Since: JDO 1.0
JDO Doc
58

PersistenceCapable.READ_OK

Static Field javax.jdo.spi.PersistenceCapable byte READ_OK If jdoFlags is set to READ_OK, then the fields in the default fetch group can be accessed for read without notifying the StateManager. Since: JDO 1.0
JDO Doc
58

PersistenceCapable.READ_WRITE_OK

Static Field javax.jdo.spi.PersistenceCapable byte READ_WRITE_OK If jdoFlags is set to READ_WRITE_OK, then the fields in the default fetch group can be accessed for read or write without notifying the StateManager. Since: JDO 1.0
JDO Doc
57

Constants.PMF_ATTRIBUTE_NONTRANSACTIONAL_READ

Static Field javax.jdo.Constants String PMF_ATTRIBUTE_NONTRANSACTIONAL_ READ The name of the persistence manager factory element's "nontransactional- read" attribute. Since: JDO 2.1
JDO Doc
57

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
57

Constants.PROPERTY_TRANSACTION_ISOLATION_LEVEL_READ_UNCOMMITTED

Static Field javax.jdo.Constants String PROPERTY_TRANSACTION_ISOLATION_LEVEL_ READ_UNCOMMITTED "javax.jdo.option.TransactionIsolationLevel. read-uncommitted" Since: JDO 2.2 See Also: PersistenceManagerFactory.supportedOptions()
JDO Doc
57

Constants.PROPERTY_TRANSACTION_ISOLATION_LEVEL_REPEATABLE_READ

Static Field javax.jdo.Constants String PROPERTY_TRANSACTION_ISOLATION_LEVEL_REPEATABLE_ READ "javax.jdo.option.TransactionIsolationLevel.repeatable- read" Since: JDO 2.2 See Also: PersistenceManagerFactory.supportedOptions()
JDO Doc
57

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()