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.core.utils;
  
  import org.apache.commons.io.IOUtils;
  import org.apache.commons.lang3.StringUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.io.FileInputStream;
  import java.io.InputStream;
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Properties;
  
  /**
   * @author Nacos
   */
  public class PropertyUtil {
      private static Properties properties = new Properties();
      private static final Logger log = LoggerFactory.getLogger(PropertyUtil.class);
  
      static {
          InputStream inputStream = null;
          try {
              String baseDir = System.getProperty("nacos.home");
              if (!StringUtils.isBlank(baseDir)) {
                  inputStream = new FileInputStream(baseDir + "/conf/application.properties");
              } else {
                  inputStream = PropertyUtil.class
                      .getResourceAsStream("/application.properties");
              }
              properties.load(inputStream);
          } catch (Exception e) {
              log.error("read property file error:" + e);
          } finally {
              IOUtils.closeQuietly(inputStream);
          }
      }
  
      public static String getProperty(String key) {
          return properties.getProperty(key);
      }
  
      public static String getProperty(String key, String defaultValue) {
          return properties.getProperty(key, defaultValue);
      }
  
      public static List<String> getPropertyList(String key) {
          List<String> valueList = new ArrayList<>();
  
          for (int i = 0; i < Integer.MAX_VALUE; i++) {
              String value = properties.getProperty(key + "[" + i + "]");
              if (StringUtils.isBlank(value)) {
                  break;
              }
  
              valueList.add(value);
          }
  
          return valueList;
      }
  
  }
  