@Transactional
  public void refresh(ConfigGroupHostMappingEntity
                         configGroupHostMappingEntity) {
    cacheLoaded = false;
    populateCache();

    entityManagerProvider.get().refresh(configGroupHostMappingEntity);
  }
Return entity object which can be used for operations like remove
directly.
@param configGroupHostMappingEntityPK
@return
ambari-server/src/main/java/org/apache/ambari/server/orm/dao/ConfigGroupHostMappingDAO.java