content: /*
   * Copyright 1999-2018 Alibaba Group Holding Ltd.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package com.alibaba.nacos.cmdb.service;
  
  
  import com.alibaba.nacos.api.cmdb.pojo.Entity;
  
  import java.util.List;
  
  /**
   * @author nkorange
   * @since 0.7.0
   */
  public interface CmdbReader {
  
      /**
       * Get entity
       *
       * @param entityName name of entity
       * @param entityType type of entity
       * @return entity
       */
      Entity queryEntity(String entityName, String entityType);
  
      /**
       * Get label of entity
       *
       * @param entityName name of entity
       * @param entityType type of entity
       * @param labelName  label name
       * @return label value
       */
      String queryLabel(String entityName, String entityType, String labelName);
  
      /**
       * Get entities of selected label
       *
       * @param labelName  name of label
       * @param labelValue value of label
       * @return list of entiy
       */
      List<Entity> queryEntitiesByLabel(String labelName, String labelValue);
  }
  