ejava.examples.webtier.jpa

Class JPAUtil

java.lang.Object

ejava.examples.webtier.jpa.JPAUtil

public class JPAUtil
extends Object

This class is used to create and hold open EntityManagerFactory objects when not running within a Java EE environment.

Author:

jcstaff

Field Summary

Fields

Modifier and Type	Field and Description
private static ThreadLocal<EntityManager>	em
private static Properties	emfProperties
private static Map<String,EntityManagerFactory>	factories
private static org.apache.commons.logging.Log	log

Constructor Summary

Constructors

Constructor and Description
JPAUtil()

Method Summary

Modifier and Type	Method and Description
static void	close() This method closes all EntityManagerFactory objects and clears them from the cache.
static void	closeEntityManager()
static EntityManager	getEntityManager()
static EntityManager	getEntityManager(String puName)
static EntityManagerFactory	getEntityManagerFactory(String puName) This method will create or return the EntityManagerFactory for the specified persistence unit.
static EntityManager	peekEntityManager() This method just allows the caller to look at entity manager to see if it is currently set.
static void	setEntityManager(EntityManager emgr)
static void	setEntityManagerFactoryProperties(Properties props) This method defines the properties to pass to createEntityManagerFactory

Methods inherited from class java.lang.Object

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

Field Detail

log

private static final org.apache.commons.logging.Log log

factories

private static final Map<String,EntityManagerFactory> factories

em

private static ThreadLocal<EntityManager> em

emfProperties

private static Properties emfProperties

Constructor Detail

JPAUtil

public JPAUtil()

Method Detail

setEntityManagerFactoryProperties

public static void setEntityManagerFactoryProperties(Properties props)

This method defines the properties to pass to createEntityManagerFactory

getEntityManagerFactory

public static EntityManagerFactory getEntityManagerFactory(String puName)

This method will create or return the EntityManagerFactory for the specified persistence unit.

Parameters:

puName - matches value in persistence.xml

Returns:

setEntityManager

public static void setEntityManager(EntityManager emgr)

getEntityManager

public static EntityManager getEntityManager(String puName)

getEntityManager

public static EntityManager getEntityManager()

peekEntityManager

public static EntityManager peekEntityManager()

This method just allows the caller to look at entity manager to see if it is currently set.

Returns:

closeEntityManager

public static void closeEntityManager()

close

public static void close()

This method closes all EntityManagerFactory objects and clears them from the cache.