content: /*
   * Copyright 1999-2024 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.console.handler.naming;
  
  import com.alibaba.nacos.api.exception.NacosException;
  import com.alibaba.nacos.api.model.Page;
  import com.alibaba.nacos.api.naming.pojo.Instance;
  import com.alibaba.nacos.naming.model.form.InstanceForm;
  
  /**
   * Interface for handling instance-related operations.
   *
   * @author zhangyukun
   */
  public interface InstanceHandler {
      
      /**
       * Retrieve a list of instances for a specific service and returns as an ObjectNode.
       *
       * @param namespaceId           the namespace ID
       * @param serviceNameWithoutGroup the service name without group
       * @param groupName             the group name
       * @param clusterName             the cluster name
       * @param page                  the page number
       * @param pageSize              the size of the page
       * @return the page object of {@link Instance}
       * @throws NacosException if the list operation fails
       */
      Page<? extends Instance> listInstances(String namespaceId, String serviceNameWithoutGroup, String groupName, String clusterName,
              int page, int pageSize) throws NacosException;
      
      /**
       * Update an instance.
       *
       * @param instanceForm the form containing instance data
       * @param instance     the instance to update
       * @throws NacosException if the update operation fails
       */
      void updateInstance(InstanceForm instanceForm, Instance instance) throws NacosException;
  }
  
  