content: /*
   * Copyright 1999-2025 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.client.address;
  
  import com.alibaba.nacos.api.exception.NacosException;
  import com.alibaba.nacos.client.env.NacosClientProperties;
  import com.alibaba.nacos.client.utils.ClientBasicParamUtil;
  import com.alibaba.nacos.common.http.client.NacosRestTemplate;
  import com.alibaba.nacos.common.lifecycle.Closeable;
  
  import java.util.List;
  
  /**
   * Server list provider.
   * 
   * @author totalo 
   */
  public interface ServerListProvider extends Closeable {
      
      /**
       * Init.
       * @param properties nacos client properties
       * @param nacosRestTemplate nacos rest template
       * @throws NacosException nacos exception
       */
      void init(final NacosClientProperties properties, final NacosRestTemplate nacosRestTemplate) throws NacosException;
      
      /**
       * Get server list.
       * @return server list
       */
      List<String> getServerList();
      
      /**
       * Get server name.
       * @return server name
       */
      default String getServerName() {
          return "";
      }
      
      /**
       * Get namespace.
       * @return namespace
       */
      default String getNamespace() {
          return "";
      }
      
      /**
       * Get context path.
       * @return context path
       */
      default String getContextPath() {
          return ClientBasicParamUtil.getDefaultContextPath();
      }
      
      /**
       * Get order.
       * @return order
       */
      int getOrder();
      
      /**
       * Match.
       * @param properties nacos client properties
       * @return match
       */
      boolean match(final NacosClientProperties properties);
      
      /**
       * check the server list is fixed or not.
       * @return true if the server list is fixed
       */
      default boolean isFixed() {
          return false;
      }
      
      /**
       * Get address source.
       * @return address source
       */
      default String getAddressSource() {
          return "";
      }
      
  }
  