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.csp.sentinel.dashboard.config;
  
  import java.util.concurrent.ConcurrentHashMap;
  import java.util.concurrent.ConcurrentMap;
  
  import org.apache.commons.lang.StringUtils;
  import org.apache.commons.lang.math.NumberUtils;
  import org.springframework.lang.NonNull;
  
  /**
   * <p>Dashboard local config support.</p>
   * <p>
   * Dashboard supports configuration loading by several ways by order:<br>
   * 1. System.properties<br>
   * 2. Env
   * </p>
   *
   * @author jason
   * @since 1.5.0
   */
  public class DashboardConfig {
  
      public static final int DEFAULT_MACHINE_HEALTHY_TIMEOUT_MS = 60_000;
  
      /**
       * Login username
       */
      public static final String CONFIG_AUTH_USERNAME = "sentinel.dashboard.auth.username";
  
      /**
       * Login password
       */
      public static final String CONFIG_AUTH_PASSWORD = "sentinel.dashboard.auth.password";
  
      /**
       * Hide application name in sidebar when it has no healthy machines after specific period in millisecond.
       */
      public static final String CONFIG_HIDE_APP_NO_MACHINE_MILLIS = "sentinel.dashboard.app.hideAppNoMachineMillis";
      /**
       * Remove application when it has no healthy machines after specific period in millisecond.
       */
      public static final String CONFIG_REMOVE_APP_NO_MACHINE_MILLIS = "sentinel.dashboard.removeAppNoMachineMillis";
      /**
       * Timeout
       */
      public static final String CONFIG_UNHEALTHY_MACHINE_MILLIS = "sentinel.dashboard.unhealthyMachineMillis";
      /**
       * Auto remove unhealthy machine after specific period in millisecond.
       */
      public static final String CONFIG_AUTO_REMOVE_MACHINE_MILLIS = "sentinel.dashboard.autoRemoveMachineMillis";
  
      private static final ConcurrentMap<String, Object> cacheMap = new ConcurrentHashMap<>();
      
      @NonNull
      private static String getConfig(String name) {
          // env
          String val = System.getenv(name);
          if (StringUtils.isNotEmpty(val)) {
              return val;
          }
          // properties
          val = System.getProperty(name);
          if (StringUtils.isNotEmpty(val)) {
              return val;
          }
          return "";
      }
  
      protected static String getConfigStr(String name) {
          if (cacheMap.containsKey(name)) {
              return (String) cacheMap.get(name);
          }
  
          String val = getConfig(name);
  
          if (StringUtils.isBlank(val)) {
              return null;
          }
  
          cacheMap.put(name, val);
          return val;
      }
  
      protected static int getConfigInt(String name, int defaultVal, int minVal) {
          if (cacheMap.containsKey(name)) {
              return (int)cacheMap.get(name);
          }
          int val = NumberUtils.toInt(getConfig(name));
          if (val == 0) {
              val = defaultVal;
          } else if (val < minVal) {
              val = minVal;
          }
          cacheMap.put(name, val);
          return val;
      }
  
      public static String getAuthUsername() {
          return getConfigStr(CONFIG_AUTH_USERNAME);
      }
  
      public static String getAuthPassword() {
          return getConfigStr(CONFIG_AUTH_PASSWORD);
      }
  
      public static int getHideAppNoMachineMillis() {
          return getConfigInt(CONFIG_HIDE_APP_NO_MACHINE_MILLIS, 0, 60000);
      }
      
      public static int getRemoveAppNoMachineMillis() {
          return getConfigInt(CONFIG_REMOVE_APP_NO_MACHINE_MILLIS, 0, 120000);
      }
      
      public static int getAutoRemoveMachineMillis() {
          return getConfigInt(CONFIG_AUTO_REMOVE_MACHINE_MILLIS, 0, 300000);
      }
      
      public static int getUnhealthyMachineMillis() {
          return getConfigInt(CONFIG_UNHEALTHY_MACHINE_MILLIS, DEFAULT_MACHINE_HEALTHY_TIMEOUT_MS, 30000);
      }
      
      public static void clearCache() {
          cacheMap.clear();
      }
  }
  