org.springframework.orm.jpa.support: public class: SharedEntityManagerBean

org.springframework.orm.jpa.support
public class: SharedEntityManagerBean [javadoc | source]

java.lang.Object
   org.springframework.orm.jpa.EntityManagerFactoryAccessor
      org.springframework.orm.jpa.support.SharedEntityManagerBean

All Implemented Interfaces:
FactoryBean, InitializingBean

FactoryBean that exposes a shared JPA javax.persistence.EntityManager reference for a given EntityManagerFactory. Typically used for an EntityManagerFactory created by org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean , as direct alternative to a JNDI lookup for a Java EE 5 server's EntityManager reference.

The shared EntityManager will behave just like an EntityManager fetched from an application server's JNDI environment, as defined by the JPA specification. It will delegate all calls to the current transactional EntityManager, if any; otherwise, it will fall back to a newly created EntityManager per operation.

Can be passed to DAOs that expect a shared EntityManager reference rather than an EntityManagerFactory. Note that Spring's org.springframework.orm.jpa.JpaTransactionManager always needs an EntityManagerFactory in order to create new transactional EntityManager instances.

Also see:

setEntityManagerFactory

setEntityManagerInterface

org.springframework.orm.jpa.LocalEntityManagerFactoryBean

org.springframework.orm.jpa.JpaTransactionManager

author: Juergen - Hoeller

since: 2.0 -

Fields inherited from org.springframework.orm.jpa.EntityManagerFactoryAccessor:
logger

Method from org.springframework.orm.jpa.support.SharedEntityManagerBean Summary:
afterPropertiesSet, getObject, getObjectType, isSingleton, setEntityManagerInterface

Methods from org.springframework.orm.jpa.EntityManagerFactoryAccessor:
createEntityManager, getEntityManagerFactory, getJpaPropertyMap, getTransactionalEntityManager, setEntityManagerFactory, setJpaProperties, setJpaPropertyMap

Methods from java.lang.Object:
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method from org.springframework.orm.jpa.support.SharedEntityManagerBean Detail:
public final void afterPropertiesSet() { EntityManagerFactory emf = getEntityManagerFactory(); if (emf == null) { throw new IllegalArgumentException("entityManagerFactory is required"); } Class[] ifcs = null; if (emf instanceof EntityManagerFactoryInfo) { EntityManagerFactoryInfo emfInfo = (EntityManagerFactoryInfo) emf; if (this.entityManagerInterface == null) { this.entityManagerInterface = emfInfo.getEntityManagerInterface(); if (this.entityManagerInterface == null) { this.entityManagerInterface = EntityManager.class; } } JpaDialect jpaDialect = emfInfo.getJpaDialect(); if (jpaDialect != null && jpaDialect.supportsEntityManagerPlusOperations()) { ifcs = new Class[] {this.entityManagerInterface, EntityManagerPlus.class}; } else { ifcs = new Class[] {this.entityManagerInterface}; } } else { if (this.entityManagerInterface == null) { this.entityManagerInterface = EntityManager.class; } ifcs = new Class[] {this.entityManagerInterface}; } this.shared = SharedEntityManagerCreator.createSharedEntityManager(emf, getJpaPropertyMap(), ifcs); }
public EntityManager getObject() { return this.shared; }
public Class<EntityManager> getObjectType() { return (this.entityManagerInterface != null ? this.entityManagerInterface : EntityManager.class); }
public boolean isSingleton() { return true; }
public void setEntityManagerInterface(Class<EntityManager> entityManagerInterface) { Assert.notNull(entityManagerInterface, "entityManagerInterface must not be null"); Assert.isAssignable(EntityManager.class, entityManagerInterface); this.entityManagerInterface = entityManagerInterface; } Specify the EntityManager interface to expose. Default is the EntityManager interface as defined by the EntityManagerFactoryInfo, if available. Else, the standard `javax.persistence.EntityManager` interface will be used.