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.maintainer.client.utils;
  
  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.common.utils.JacksonUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * manage param tool.
   *
   * @author nacos
   */
  public class ParamUtil {
      
      private static final Logger LOGGER = LoggerFactory.getLogger(ParamUtil.class);
      
      private static int connectTimeout;
      
      private static int readTimeout;
      
      private static int maxRetryTimes;
      
      private static long refreshIntervalMills;
      
      private static final String MAINTAINER_CLIENT_CONNECT_TIMEOUT_KEY = "MAINTAINER.CLIENT.CONNECT.TIMEOUT";
      
      private static final String MAINTAINER_CLIENT_READ_TIMEOUT_KEY = "MAINTAINER.CLIENT.READ.TIMEOUT";
      
      private static final String MAINTAINER_CLIENT_MAX_RETRY_TIMES_KEY = "MAINTAINER.CLIENT.MAX.RETRY.TIMES";
      
      private static final String MAINTAINER_CLIENT_REFRESH_INTERVAL_MILLS_KEY = "MAINTAINER.CLIENT.REFRESH.INTERVAL.MILLS";
      
      private static final String DEFAULT_CONNECT_TIMEOUT = "2000";
      
      private static final String DEFAULT_READ_TIMEOUT = "5000";
      
      private static final int DEFAULT_MAX_RETRY_TIMES = 3;
      
      private static final int DEFAULT_REFRESH_INTERVAL_MILLS = 5000;
      
      static {
          connectTimeout = initConnectionTimeout();
          LOGGER.info("[settings] [maintainer-http-client] connect timeout:{}", connectTimeout);
          
          readTimeout = initReadTimeout();
          LOGGER.info("[settings] [maintainer-http-client] read timeout:{}", readTimeout);
          
          maxRetryTimes = initMaxRetryTimes();
          LOGGER.info("[settings] [maintainer-http-client] max retry times:{}", maxRetryTimes);
          
          refreshIntervalMills = initRefreshIntervalMills();
          LOGGER.info("[settings] [maintainer-http-client] auth refresh interval mills:{}", refreshIntervalMills);
      }
      
      private static int initConnectionTimeout() {
          try {
              String connectTimeout = NacosClientProperties.PROTOTYPE.getProperty(MAINTAINER_CLIENT_CONNECT_TIMEOUT_KEY, DEFAULT_CONNECT_TIMEOUT);
              return Integer.parseInt(connectTimeout);
          } catch (NumberFormatException e) {
              final String msg = "[http-client] invalid connect timeout:" + connectTimeout;
              LOGGER.error("[settings] {}", msg, e);
              throw new IllegalArgumentException(msg, e);
          }
      }
      
      private static int initReadTimeout() {
          try {
              String readTimeout = NacosClientProperties.PROTOTYPE.getProperty(MAINTAINER_CLIENT_READ_TIMEOUT_KEY, DEFAULT_READ_TIMEOUT);
              return Integer.parseInt(readTimeout);
          } catch (NumberFormatException e) {
              final String msg = "[http-client] invalid read timeout:" + readTimeout;
              LOGGER.error("[settings] {}", msg, e);
              throw new IllegalArgumentException(msg, e);
          }
      }
      
      private static int initMaxRetryTimes() {
          try {
              return Integer.parseInt(NacosClientProperties.PROTOTYPE.getProperty(MAINTAINER_CLIENT_MAX_RETRY_TIMES_KEY,
                      String.valueOf(DEFAULT_MAX_RETRY_TIMES)));
          } catch (NumberFormatException e) {
              final String msg = "[http-client] invalid max retry times:" + maxRetryTimes;
              LOGGER.error("[settings] {}", msg, e);
              throw new IllegalArgumentException(msg, e);
          }
      }
      
      private static long initRefreshIntervalMills() {
          try {
              return Long.parseLong(NacosClientProperties.PROTOTYPE.getProperty(MAINTAINER_CLIENT_REFRESH_INTERVAL_MILLS_KEY,
                      String.valueOf(DEFAULT_REFRESH_INTERVAL_MILLS)));
          } catch (NumberFormatException e) {
              final String msg = "[http-client] invalid auth refresh interval :" + refreshIntervalMills;
              LOGGER.error("[settings] {}", msg, e);
              throw new IllegalArgumentException(msg, e);
          }
      }
      
      public static int getConnectTimeout() {
          return connectTimeout;
      }
      
      public static void setConnectTimeout(int connectTimeout) {
          ParamUtil.connectTimeout = connectTimeout;
      }
      
      public static int getReadTimeout() {
          return readTimeout;
      }
      
      public static void setReadTimeout(int readTimeout) {
          ParamUtil.readTimeout = readTimeout;
      }
      
      public static int getMaxRetryTimes() {
          return maxRetryTimes;
      }
      
      public static String getDefaultNamespaceId() {
          return Constants.DEFAULT_NAMESPACE_ID;
      }
      
      public static String getDefaultGroupName() {
          return Constants.DEFAULT_GROUP;
      }
      
      public static long getRefreshIntervalMills() {
          return refreshIntervalMills;
      }
      
      /**
       * 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(NoneSelector.class, "NoneSelector");
          JacksonUtils.registerSubtype(ExpressionSelector.class, SelectorType.label.name());
          JacksonUtils.registerSubtype(ExpressionSelector.class, "LabelSelector");
      }
  }
  