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.client.naming.utils;
  
  import com.alibaba.nacos.api.PropertyKeyConst;
  import com.alibaba.nacos.api.SystemPropertyKeyConst;
  import com.alibaba.nacos.api.common.Constants;
  import com.alibaba.nacos.api.selector.ExpressionSelector;
  import com.alibaba.nacos.api.selector.NoneSelector;
  import com.alibaba.nacos.api.selector.SelectorType;
  import com.alibaba.nacos.client.env.NacosClientProperties;
  import com.alibaba.nacos.client.env.SourceType;
  import com.alibaba.nacos.client.utils.ContextPathUtil;
  import com.alibaba.nacos.client.utils.LogUtils;
  import com.alibaba.nacos.client.utils.TemplateUtils;
  import com.alibaba.nacos.client.utils.TenantUtil;
  import com.alibaba.nacos.common.utils.JacksonUtils;
  import com.alibaba.nacos.common.utils.StringUtils;
  
  /**
   * Init utils.
   *
   * @author liaochuntao
   * @author deshao
   */
  public class InitUtils {
      
      /**
       * Add a difference to the name naming. This method simply initializes the namespace for Naming. Config
       * initialization is not the same, so it cannot be reused directly.
       *
       * @param properties properties
       * @return namespace
       */
      public static String initNamespaceForNaming(NacosClientProperties properties) {
          String tmpNamespace = null;
          
          String isUseCloudNamespaceParsing = properties.getProperty(PropertyKeyConst.IS_USE_CLOUD_NAMESPACE_PARSING,
                  properties.getProperty(SystemPropertyKeyConst.IS_USE_CLOUD_NAMESPACE_PARSING,
                          String.valueOf(Constants.DEFAULT_USE_CLOUD_NAMESPACE_PARSING)));
          
          if (Boolean.parseBoolean(isUseCloudNamespaceParsing)) {
              
              tmpNamespace = TenantUtil.getUserTenantForAns();
              LogUtils.NAMING_LOGGER.info("initializer namespace from ans.namespace attribute : {}", tmpNamespace);
              
              tmpNamespace = TemplateUtils.stringEmptyAndThenExecute(tmpNamespace, () -> {
                  String namespace = properties.getProperty(PropertyKeyConst.SystemEnv.ALIBABA_ALIWARE_NAMESPACE);
                  LogUtils.NAMING_LOGGER.info(
                          "initializer namespace from ALIBABA_ALIWARE_NAMESPACE attribute :" + namespace);
                  return namespace;
              });
          }
          
          tmpNamespace = TemplateUtils.stringEmptyAndThenExecute(tmpNamespace, () -> {
              String namespace = properties.getPropertyFrom(SourceType.JVM, PropertyKeyConst.NAMESPACE);
              LogUtils.NAMING_LOGGER.info("initializer namespace from namespace attribute :" + namespace);
              return namespace;
          });
          
          if (StringUtils.isEmpty(tmpNamespace)) {
              tmpNamespace = properties.getProperty(PropertyKeyConst.NAMESPACE);
          }
          
          tmpNamespace = TemplateUtils.stringEmptyAndThenExecute(tmpNamespace, () -> UtilAndComs.DEFAULT_NAMESPACE_ID);
          return tmpNamespace;
      }
      
      /**
       * Init web root context.
       *
       * @param properties properties
       * @since 1.4.1
       */
      public static void initWebRootContext(NacosClientProperties properties) {
          final String webContext = properties.getProperty(PropertyKeyConst.CONTEXT_PATH);
          TemplateUtils.stringNotEmptyAndThenExecute(webContext, () -> {
              UtilAndComs.webContext = ContextPathUtil.normalizeContextPath(webContext);
              UtilAndComs.nacosUrlBase = UtilAndComs.webContext + "/v1/ns";
              UtilAndComs.nacosUrlInstance = UtilAndComs.nacosUrlBase + "/instance";
          });
      }
      
      /**
       * Register subType for serialization.
       *
       * <p>
       * Now these subType implementation class has registered in static code. But there are some problem for classloader.
       * The implementation class will be loaded when they are used, which will make deserialize before register.
       * </p>
       *
       * <p>
       * 子类实现类中的静态代码串中已经向Jackson进行了注册，但是由于classloader的原因，只有当 该子类被使用的时候，才会加载该类。这可能会导致Jackson先进性反序列化，再注册子类，从而导致 反序列化失败。
       * </p>
       */
      public static void initSerialization() {
          // TODO register in implementation class or remove subType
          JacksonUtils.registerSubtype(NoneSelector.class, SelectorType.none.name());
          JacksonUtils.registerSubtype(ExpressionSelector.class, SelectorType.label.name());
      }
  }
  