Example usage for javax.persistence EntityManagerFactory createEntityManager

Introduction

In this page you can find the example usage for javax.persistence EntityManagerFactory createEntityManager.

Prototype

public EntityManager createEntityManager(SynchronizationType synchronizationType);

Source Link

Document

Create a new JTA application-managed EntityManager with the specified synchronization type.

Usage

From source file:org.springframework.orm.jpa.ExtendedEntityManagerCreator.java

/**
 * Create a container-managed extended EntityManager proxy.
 * @param emf the EntityManagerFactory to create the EntityManager with.
 * If this implements the EntityManagerFactoryInfo interface, the corresponding
 * JpaDialect and PersistenceUnitInfo will be detected accordingly.
 * @param properties the properties to be passed into the {@code createEntityManager}
 * call (may be {@code null})/*from   w  ww.j av a  2s . c  o m*/
 * @param synchronizedWithTransaction whether to automatically join ongoing
 * transactions (according to the JPA 2.1 SynchronizationType rules)
 * @return a container-managed EntityManager that expects container-driven lifecycle
 * management but may opt out of automatic transaction synchronization
 * @see javax.persistence.EntityManagerFactory#createEntityManager(java.util.Map)
 * @since 4.0
 */
public static EntityManager createContainerManagedEntityManager(EntityManagerFactory emf,
        @Nullable Map<?, ?> properties, boolean synchronizedWithTransaction) {

    Assert.notNull(emf, "EntityManagerFactory must not be null");
    if (emf instanceof EntityManagerFactoryInfo) {
        EntityManagerFactoryInfo emfInfo = (EntityManagerFactoryInfo) emf;
        EntityManagerFactory nativeEmf = emfInfo.getNativeEntityManagerFactory();
        EntityManager rawEntityManager = (!CollectionUtils.isEmpty(properties)
                ? nativeEmf.createEntityManager(properties)
                : nativeEmf.createEntityManager());
        return createProxy(rawEntityManager, emfInfo, true, synchronizedWithTransaction);
    } else {
        EntityManager rawEntityManager = (!CollectionUtils.isEmpty(properties)
                ? emf.createEntityManager(properties)
                : emf.createEntityManager());
        return createProxy(rawEntityManager, null, null, null, null, true, synchronizedWithTransaction);
    }
}

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From source file:com.google.code.guice.repository.filter.PersistFilter.java

@Override
protected EntityManager createEntityManager(EntityManagerFactory emf) {
    PersistenceUnitConfiguration configuration = configurationManager
            .getConfiguration(getPersistenceUnitName());
    EntityManager entityManager = emf.createEntityManager(configuration.getProperties());
    configurationManager.changeEntityManager(getPersistenceUnitName(), entityManager);
    return entityManager;
}

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From source file:org.springframework.orm.jpa.EntityManagerFactoryAccessor.java

/**
 * Obtain a new EntityManager from this accessor's EntityManagerFactory.
 * <p>Can be overridden in subclasses to create specific EntityManager variants.
 * @return a new EntityManager//w ww  .  j ava2s .c  o m
 * @throws IllegalStateException if this accessor is not configured with an EntityManagerFactory
 * @see javax.persistence.EntityManagerFactory#createEntityManager()
 * @see javax.persistence.EntityManagerFactory#createEntityManager(java.util.Map)
 */
protected EntityManager createEntityManager() throws IllegalStateException {
    EntityManagerFactory emf = obtainEntityManagerFactory();
    Map<String, Object> properties = getJpaPropertyMap();
    return (!CollectionUtils.isEmpty(properties) ? emf.createEntityManager(properties)
            : emf.createEntityManager());
}

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