How to use

getPersistenceContext

method

in

org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor

  private EntityManager resolveExtendedEntityManager(Object target, @Nullable String requestingBeanName) {
    // Obtain EntityManager reference from JNDI?
    EntityManager em = getPersistenceContext(this.unitName, true);
    if (em == null) {
      // No pre-built EntityManager found -> build one based on factory.
      // Obtain EntityManagerFactory from JNDI?
      EntityManagerFactory emf = getPersistenceUnit(this.unitName);
      if (emf == null) {
        // Need to search for EntityManagerFactory beans.
        emf = findEntityManagerFactory(this.unitName, requestingBeanName);
      }
      // Inject a container-managed extended EntityManager.
      em = ExtendedEntityManagerCreator.createContainerManagedEntityManager(
          emf, this.properties, this.synchronizedWithTransaction);
    }
    if (em instanceof EntityManagerProxy && beanFactory != null && requestingBeanName != null &&
        beanFactory.containsBean(requestingBeanName) && !beanFactory.isPrototype(requestingBeanName)) {
      extendedEntityManagersToClose.put(target, ((EntityManagerProxy) em).getTargetEntityManager());
    }
    return em;
  }
}

private EntityManager resolveEntityManager(@Nullable String requestingBeanName) {
  // Obtain EntityManager reference from JNDI?
  EntityManager em = getPersistenceContext(this.unitName, false);
  if (em == null) {
    // No pre-built EntityManager found -> build one based on factory.
    // Obtain EntityManagerFactory from JNDI?
    EntityManagerFactory emf = getPersistenceUnit(this.unitName);
    if (emf == null) {
      // Need to search for EntityManagerFactory beans.
      emf = findEntityManagerFactory(this.unitName, requestingBeanName);
    }
    // Inject a shared transactional EntityManager proxy.
    if (emf instanceof EntityManagerFactoryInfo &&
        ((EntityManagerFactoryInfo) emf).getEntityManagerInterface() != null) {
      // Create EntityManager based on the info's vendor-specific type
      // (which might be more specific than the field's type).
      em = SharedEntityManagerCreator.createSharedEntityManager(
          emf, this.properties, this.synchronizedWithTransaction);
    }
    else {
      // Create EntityManager based on the field's type.
      em = SharedEntityManagerCreator.createSharedEntityManager(
          emf, this.properties, this.synchronizedWithTransaction, getResourceType());
    }
  }
  return em;
}

  private EntityManager resolveExtendedEntityManager(Object target, @Nullable String requestingBeanName) {
    // Obtain EntityManager reference from JNDI?
    EntityManager em = getPersistenceContext(this.unitName, true);
    if (em == null) {
      // No pre-built EntityManager found -> build one based on factory.
      // Obtain EntityManagerFactory from JNDI?
      EntityManagerFactory emf = getPersistenceUnit(this.unitName);
      if (emf == null) {
        // Need to search for EntityManagerFactory beans.
        emf = findEntityManagerFactory(this.unitName, requestingBeanName);
      }
      // Inject a container-managed extended EntityManager.
      em = ExtendedEntityManagerCreator.createContainerManagedEntityManager(
          emf, this.properties, this.synchronizedWithTransaction);
    }
    if (em instanceof EntityManagerProxy && beanFactory != null && requestingBeanName != null &&
        beanFactory.containsBean(requestingBeanName) && !beanFactory.isPrototype(requestingBeanName)) {
      extendedEntityManagersToClose.put(target, ((EntityManagerProxy) em).getTargetEntityManager());
    }
    return em;
  }
}

private EntityManager resolveEntityManager(@Nullable String requestingBeanName) {
  // Obtain EntityManager reference from JNDI?
  EntityManager em = getPersistenceContext(this.unitName, false);
  if (em == null) {
    // No pre-built EntityManager found -> build one based on factory.
    // Obtain EntityManagerFactory from JNDI?
    EntityManagerFactory emf = getPersistenceUnit(this.unitName);
    if (emf == null) {
      // Need to search for EntityManagerFactory beans.
      emf = findEntityManagerFactory(this.unitName, requestingBeanName);
    }
    // Inject a shared transactional EntityManager proxy.
    if (emf instanceof EntityManagerFactoryInfo &&
        ((EntityManagerFactoryInfo) emf).getEntityManagerInterface() != null) {
      // Create EntityManager based on the info's vendor-specific type
      // (which might be more specific than the field's type).
      em = SharedEntityManagerCreator.createSharedEntityManager(
          emf, this.properties, this.synchronizedWithTransaction);
    }
    else {
      // Create EntityManager based on the field's type.
      em = SharedEntityManagerCreator.createSharedEntityManager(
          emf, this.properties, this.synchronizedWithTransaction, getResourceType());
    }
  }
  return em;
}

  private EntityManager resolveExtendedEntityManager(Object target, @Nullable String requestingBeanName) {
    // Obtain EntityManager reference from JNDI?
    EntityManager em = getPersistenceContext(this.unitName, true);
    if (em == null) {
      // No pre-built EntityManager found -> build one based on factory.
      // Obtain EntityManagerFactory from JNDI?
      EntityManagerFactory emf = getPersistenceUnit(this.unitName);
      if (emf == null) {
        // Need to search for EntityManagerFactory beans.
        emf = findEntityManagerFactory(this.unitName, requestingBeanName);
      }
      // Inject a container-managed extended EntityManager.
      em = ExtendedEntityManagerCreator.createContainerManagedEntityManager(
          emf, this.properties, this.synchronizedWithTransaction);
    }
    if (em instanceof EntityManagerProxy && beanFactory != null && requestingBeanName != null &&
        beanFactory.containsBean(requestingBeanName) && !beanFactory.isPrototype(requestingBeanName)) {
      extendedEntityManagersToClose.put(target, ((EntityManagerProxy) em).getTargetEntityManager());
    }
    return em;
  }
}

private EntityManager resolveEntityManager(@Nullable String requestingBeanName) {
  // Obtain EntityManager reference from JNDI?
  EntityManager em = getPersistenceContext(this.unitName, false);
  if (em == null) {
    // No pre-built EntityManager found -> build one based on factory.
    // Obtain EntityManagerFactory from JNDI?
    EntityManagerFactory emf = getPersistenceUnit(this.unitName);
    if (emf == null) {
      // Need to search for EntityManagerFactory beans.
      emf = findEntityManagerFactory(this.unitName, requestingBeanName);
    }
    // Inject a shared transactional EntityManager proxy.
    if (emf instanceof EntityManagerFactoryInfo &&
        ((EntityManagerFactoryInfo) emf).getEntityManagerInterface() != null) {
      // Create EntityManager based on the info's vendor-specific type
      // (which might be more specific than the field's type).
      em = SharedEntityManagerCreator.createSharedEntityManager(
          emf, this.properties, this.synchronizedWithTransaction);
    }
    else {
      // Create EntityManager based on the field's type.
      em = SharedEntityManagerCreator.createSharedEntityManager(
          emf, this.properties, this.synchronizedWithTransaction, getResourceType());
    }
  }
  return em;
}