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.client.address;
  
  import com.alibaba.nacos.api.PropertyKeyConst;
  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.utils.StringUtils;
  
  import java.util.List;
  
  /**
   * Address server list provider.
   * 
   * @author totalo
   */
  public abstract class AbstractServerListProvider implements ServerListProvider {
      
      protected String contextPath = ClientBasicParamUtil.getDefaultContextPath();
      
      protected String namespace = "";
      
      @Override
      public void init(final NacosClientProperties properties, final NacosRestTemplate nacosRestTemplate) throws NacosException {
          if (null == properties) {
              throw new NacosException(NacosException.INVALID_PARAM, "properties is null");
          }
          initContextPath(properties);
          initNameSpace(properties);
      }
      
      /**
       * Get server list.
       * @return server list
       */
      @Override
      public abstract List<String> getServerList();
      
      /**
       * Get server name.
       * @return server name
       */
      @Override
      public abstract String getServerName();
      
      /**
       * Get order.
       * @return order
       */
      @Override
      public abstract int getOrder();
      
      public String getContextPath() {
          return contextPath;
      }
      
      public String getNamespace() {
          return namespace;
      }
      
      private void initContextPath(NacosClientProperties properties) {
          String contentPathTmp = properties.getProperty(PropertyKeyConst.CONTEXT_PATH);
          if (!StringUtils.isBlank(contentPathTmp)) {
              this.contextPath = contentPathTmp;
          }
      }
      
      private void initNameSpace(NacosClientProperties properties) {
          String namespace = properties.getProperty(PropertyKeyConst.NAMESPACE);
          if (StringUtils.isNotBlank(namespace)) {
              this.namespace = namespace;
          }
      }
  }
  