OpenEntityManagerInViewInterceptorExcerpt

public class OpenEntityManagerInViewInterceptor extends EntityManagerFactoryAccessor implements AsyncWebRequestInterceptor {

@Override
public void afterCompletion(WebRequest request, Exception ex) throws DataAccessException {
  if (!decrementParticipateCount(request)) {
    EntityManagerHolder emHolder = (EntityManagerHolder)TransactionSynchronizationManager.unbindResource(getEntityManagerFactory());
    logger.debug("Closing JPA EntityManager in OpenEntityManagerInViewInterceptor");
    EntityManagerFactoryUtils.closeEntityManager(emHolder.getEntityManager());
  }
}

}