org.springframework.orm.jdo

Class PersistenceManagerFactoryUtils

java.lang.Object

org.springframework.orm.jdo.PersistenceManagerFactoryUtils

public abstract class PersistenceManagerFactoryUtils
extends Object

Helper class featuring methods for JDO PersistenceManager handling, allowing for reuse of PersistenceManager instances within transactions. Also provides support for exception translation.

Used internally by JdoTransactionManager. Can also be used directly in application code.

Since:

03.06.2003

Author:

Juergen Hoeller

See Also:

JdoTransactionManager, JtaTransactionManager, TransactionSynchronizationManager

Field Summary

Fields

Modifier and Type	Field and Description
static int	PERSISTENCE_MANAGER_SYNCHRONIZATION_ORDER Order value for TransactionSynchronization objects that clean up JDO PersistenceManagers.

Constructor Summary

Constructors

Constructor and Description
PersistenceManagerFactoryUtils()

Method Summary

Modifier and Type	Method and Description
static void	applyTransactionTimeout(javax.jdo.Query query, javax.jdo.PersistenceManagerFactory pmf) Apply the current transaction timeout, if any, to the given JDO Query object.
static DataAccessException	convertJdoAccessException(javax.jdo.JDOException ex) Convert the given JDOException to an appropriate exception from the org.springframework.dao hierarchy.
static javax.jdo.PersistenceManager	doGetPersistenceManager(javax.jdo.PersistenceManagerFactory pmf, boolean allowCreate) Obtain a JDO PersistenceManager via the given factory.
static void	doReleasePersistenceManager(javax.jdo.PersistenceManager pm, javax.jdo.PersistenceManagerFactory pmf) Actually release a PersistenceManager for the given factory.
static javax.jdo.PersistenceManager	getPersistenceManager(javax.jdo.PersistenceManagerFactory pmf, boolean allowCreate) Obtain a JDO PersistenceManager via the given factory.
static boolean	isPersistenceManagerTransactional(javax.jdo.PersistenceManager pm, javax.jdo.PersistenceManagerFactory pmf) Return whether the given JDO PersistenceManager is transactional, that is, bound to the current thread by Spring's transaction facilities.
static void	releasePersistenceManager(javax.jdo.PersistenceManager pm, javax.jdo.PersistenceManagerFactory pmf) Close the given PersistenceManager, created via the given factory, if it is not managed externally (i.e.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

PERSISTENCE_MANAGER_SYNCHRONIZATION_ORDER

public static final int PERSISTENCE_MANAGER_SYNCHRONIZATION_ORDER

Order value for TransactionSynchronization objects that clean up JDO PersistenceManagers. Return DataSourceUtils.CONNECTION_SYNCHRONIZATION_ORDER - 100 to execute PersistenceManager cleanup before JDBC Connection cleanup, if any.

See Also:

DataSourceUtils.CONNECTION_SYNCHRONIZATION_ORDER, Constant Field Values

Constructor Detail

PersistenceManagerFactoryUtils

public PersistenceManagerFactoryUtils()

Method Detail

getPersistenceManager

public static javax.jdo.PersistenceManager getPersistenceManager(javax.jdo.PersistenceManagerFactory pmf,
                                                                 boolean allowCreate)
                                                          throws DataAccessResourceFailureException,
                                                                 IllegalStateException

Obtain a JDO PersistenceManager via the given factory. Is aware of a corresponding PersistenceManager bound to the current thread, for example when using JdoTransactionManager. Will create a new PersistenceManager else, if "allowCreate" is true.

Parameters:

pmf - PersistenceManagerFactory to create the PersistenceManager with

allowCreate - if a non-transactional PersistenceManager should be created when no transactional PersistenceManager can be found for the current thread

Returns:

the PersistenceManager

Throws:

DataAccessResourceFailureException - if the PersistenceManager couldn't be obtained

IllegalStateException - if no thread-bound PersistenceManager found and "allowCreate" is false

See Also:

JdoTransactionManager

doGetPersistenceManager

public static javax.jdo.PersistenceManager doGetPersistenceManager(javax.jdo.PersistenceManagerFactory pmf,
                                                                   boolean allowCreate)
                                                            throws javax.jdo.JDOException,
                                                                   IllegalStateException

Obtain a JDO PersistenceManager via the given factory. Is aware of a corresponding PersistenceManager bound to the current thread, for example when using JdoTransactionManager. Will create a new PersistenceManager else, if "allowCreate" is true.

Same as getPersistenceManager, but throwing the original JDOException.

Parameters:

pmf - PersistenceManagerFactory to create the PersistenceManager with

allowCreate - if a non-transactional PersistenceManager should be created when no transactional PersistenceManager can be found for the current thread

Returns:

the PersistenceManager

Throws:

javax.jdo.JDOException - if the PersistenceManager couldn't be created

IllegalStateException - if no thread-bound PersistenceManager found and "allowCreate" is false

See Also:

getPersistenceManager(javax.jdo.PersistenceManagerFactory, boolean), JdoTransactionManager

isPersistenceManagerTransactional

public static boolean isPersistenceManagerTransactional(javax.jdo.PersistenceManager pm,
                                                        javax.jdo.PersistenceManagerFactory pmf)

Return whether the given JDO PersistenceManager is transactional, that is, bound to the current thread by Spring's transaction facilities.

Parameters:

pm - the JDO PersistenceManager to check

pmf - JDO PersistenceManagerFactory that the PersistenceManager was created with (can be null)

Returns:

whether the PersistenceManager is transactional

applyTransactionTimeout

public static void applyTransactionTimeout(javax.jdo.Query query,
                                           javax.jdo.PersistenceManagerFactory pmf)
                                    throws javax.jdo.JDOException

Apply the current transaction timeout, if any, to the given JDO Query object.

Parameters:

query - the JDO Query object

pmf - JDO PersistenceManagerFactory that the Query was created for

Throws:

javax.jdo.JDOException - if thrown by JDO methods

convertJdoAccessException

public static DataAccessException convertJdoAccessException(javax.jdo.JDOException ex)

Convert the given JDOException to an appropriate exception from the org.springframework.dao hierarchy.

The most important cases like object not found or optimistic locking failure are covered here. For more fine-granular conversion, JdoTransactionManager supports sophisticated translation of exceptions via a JdoDialect.

Parameters:

ex - JDOException that occured

Returns:

the corresponding DataAccessException instance

See Also:

JdoTransactionManager.convertJdoAccessException(javax.jdo.JDOException), JdoDialect.translateException(javax.jdo.JDOException)

releasePersistenceManager

public static void releasePersistenceManager(javax.jdo.PersistenceManager pm,
                                             javax.jdo.PersistenceManagerFactory pmf)

Close the given PersistenceManager, created via the given factory, if it is not managed externally (i.e. not bound to the thread).

Parameters:

pm - PersistenceManager to close

pmf - PersistenceManagerFactory that the PersistenceManager was created with (can be null)

doReleasePersistenceManager

public static void doReleasePersistenceManager(javax.jdo.PersistenceManager pm,
                                               javax.jdo.PersistenceManagerFactory pmf)
                                        throws javax.jdo.JDOException

Actually release a PersistenceManager for the given factory. Same as releasePersistenceManager, but throwing the original JDOException.

Parameters:

pm - PersistenceManager to close

pmf - PersistenceManagerFactory that the PersistenceManager was created with (can be null)

Throws:

javax.jdo.JDOException - if thrown by JDO methods