org.springframework.orm.jpa

Class LocalEntityManagerFactoryBean

java.lang.Object

org.springframework.orm.jpa.AbstractEntityManagerFactoryBean

org.springframework.orm.jpa.LocalEntityManagerFactoryBean

All Implemented Interfaces:

java.io.Serializable, Aware, BeanClassLoaderAware, BeanFactoryAware, BeanNameAware, DisposableBean, FactoryBean<EntityManagerFactory>, InitializingBean, PersistenceExceptionTranslator, EntityManagerFactoryInfo

public class LocalEntityManagerFactoryBean
extends AbstractEntityManagerFactoryBean

FactoryBean that creates a JPA javax.persistence.EntityManagerFactory according to JPA's standard standalone bootstrap contract. This is the simplest way to set up a shared JPA EntityManagerFactory in a Spring application context; the EntityManagerFactory can then be passed to JPA-based DAOs via dependency injection. Note that switching to a JNDI lookup or to a LocalContainerEntityManagerFactoryBean definition is just a matter of configuration!

Configuration settings are usually read from a META-INF/persistence.xml config file, residing in the class path, according to the JPA standalone bootstrap contract. Additionally, most JPA providers will require a special VM agent (specified on JVM startup) that allows them to instrument application classes. See the Java Persistence API specification and your provider documentation for setup details.

This EntityManagerFactory bootstrap is appropriate for standalone applications which solely use JPA for data access. If you want to set up your persistence provider for an external DataSource and/or for global transactions which span multiple resources, you will need to either deploy it into a full Java EE application server and access the deployed EntityManagerFactory via JNDI, or use Spring's LocalContainerEntityManagerFactoryBean with appropriate configuration for local setup according to JPA's container contract.

Note: This FactoryBean has limited configuration power in terms of what configuration it is able to pass to the JPA provider. If you need more flexible configuration, for example passing a Spring-managed JDBC DataSource to the JPA provider, consider using Spring's more powerful LocalContainerEntityManagerFactoryBean instead.

NOTE: Spring's JPA support requires JPA 2.0 or higher, as of Spring 4.0. JPA 1.0 based applications are still supported; however, a JPA 2.0/2.1 compliant persistence provider is needed at runtime.

Since:

2.0

Author:

Juergen Hoeller, Rod Johnson

See Also:

AbstractEntityManagerFactoryBean.setJpaProperties(java.util.Properties), AbstractEntityManagerFactoryBean.setJpaVendorAdapter(org.springframework.orm.jpa.JpaVendorAdapter), JpaTransactionManager.setEntityManagerFactory(EntityManagerFactory), LocalContainerEntityManagerFactoryBean, JndiObjectFactoryBean, SharedEntityManagerBean, javax.persistence.Persistence#createEntityManagerFactory, javax.persistence.spi.PersistenceProvider#createEntityManagerFactory, Serialized Form

Field Summary

Fields inherited from class org.springframework.orm.jpa.AbstractEntityManagerFactoryBean

logger, nativeEntityManagerFactory

Constructor Summary

Constructors

Constructor and Description
LocalEntityManagerFactoryBean()

Method Summary

Modifier and Type	Method and Description
protected EntityManagerFactory	createNativeEntityManagerFactory() Initialize the EntityManagerFactory for the given configuration.

Methods inherited from class org.springframework.orm.jpa.AbstractEntityManagerFactoryBean

afterPropertiesSet, createEntityManagerFactoryProxy, destroy, getBeanClassLoader, getDataSource, getEntityManagerInterface, getJpaDialect, getJpaPropertyMap, getJpaVendorAdapter, getNativeEntityManagerFactory, getObject, getObjectType, getPersistenceProvider, getPersistenceUnitInfo, getPersistenceUnitName, invokeProxyMethod, isSingleton, setBeanClassLoader, setBeanFactory, setBeanName, setEntityManagerFactoryInterface, setEntityManagerInterface, setJpaDialect, setJpaProperties, setJpaPropertyMap, setJpaVendorAdapter, setPersistenceProvider, setPersistenceProviderClass, setPersistenceUnitName, translateExceptionIfPossible, writeReplace

Methods inherited from class java.lang.Object

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

Constructor Detail

LocalEntityManagerFactoryBean

public LocalEntityManagerFactoryBean()

Method Detail

createNativeEntityManagerFactory

protected EntityManagerFactory createNativeEntityManagerFactory()
                                                         throws PersistenceException

Initialize the EntityManagerFactory for the given configuration.

Specified by:

createNativeEntityManagerFactory in class AbstractEntityManagerFactoryBean

Returns:

EntityManagerFactory instance returned by this FactoryBean

Throws:

javax.persistence.PersistenceException - in case of JPA initialization errors

PersistenceException - if the EntityManager cannot be created