com.sptci.jdo
Class PersistenceManagerFactory

java.lang.Object
  com.sptci.jdo.PersistenceManagerFactory

public final class PersistenceManagerFactory
extends java.lang.Object

A factory for accessing instances of a JDO Persistence Manager that are necessary for interacting with the JDO data store.

Version:

$Id: PersistenceManagerFactory.java,v 1.2 2006/02/14 22:41:41 rakesh Exp $

Author:

Rakesh Vidyadharan 05^th February, 2006

Copyright 2006, Sans Pareil Technologies, Inc.

Field Summary

private static java.lang.String	JDO_DATASTORE_PROPERTIES The name of the system property used to specify the location of the JDO DataStore connection properties.
private static java.util.logging.Logger	logger The logger used to log messages to.
private static javax.jdo.PersistenceManager	persistenceManager The single application wide instanace that is used to manage read only objects.

Constructor Summary

private

PersistenceManagerFactory() Default constructor.

Method Summary

private static java.util.Properties	fetchProperties() Open the properties file and read the properties from it.
static javax.jdo.PersistenceManager	getPersistenceManager() Return an instance of a PersistenceManager for interacting with the JDO data store.
private static void	initPersistenceManager() Initialise the persistenceManager if it has not already been initialised, or has been closed.

Methods inherited from class java.lang.Object

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

Field Detail

logger

private static final java.util.logging.Logger logger

The logger used to log messages to.

JDO_DATASTORE_PROPERTIES

private static final java.lang.String JDO_DATASTORE_PROPERTIES

The name of the system property used to specify the location of the JDO DataStore connection properties.

See Also:

Constant Field Values

persistenceManager

private static javax.jdo.PersistenceManager persistenceManager

The single application wide instanace that is used to manage read only objects.

Constructor Detail

PersistenceManagerFactory

private PersistenceManagerFactory()

Default constructor. Cannot be initialsed.

Method Detail

getPersistenceManager

public static final javax.jdo.PersistenceManager getPersistenceManager()
                                                                throws java.lang.RuntimeException

Return an instance of a PersistenceManager for interacting with the JDO data store.

Throws:

java.lang.RuntimeException - If errors are encountered while reading the properties file

See Also:

initPersistenceManager()

initPersistenceManager

private static final void initPersistenceManager()
                                          throws java.lang.RuntimeException

Initialise the persistenceManager if it has not already been initialised, or has been closed.

Throws:

java.lang.RuntimeException - If errors are encountered while reading the properties file while initialising the persistence manager.

See Also:

fetchProperties()

fetchProperties

private static final java.util.Properties fetchProperties()
                                                   throws java.lang.RuntimeException

Open the properties file and read the properties from it. The full path to the properties file must be specified as a system property with name ObjectDBProperties

Returns:

Properties - The initialised properties object.

Throws:

java.lang.RuntimeException - If errors are encountered while reading the properties file

See Also:

JDO_DATASTORE_PROPERTIES