content: package cn.datax.common.dictionary.utils;
  
  import cn.datax.common.core.RedisConstant;
  import cn.datax.common.redis.service.RedisService;
  import cn.datax.common.utils.SpringContextHolder;
  import lombok.extern.slf4j.Slf4j;
  
  import java.util.Optional;
  
  @Slf4j
  public class ConfigUtil {
  
      private ConfigUtil() {}
  
      private static volatile ConfigUtil instance;
  
      public static ConfigUtil getInstance() {
          if(instance == null) {
              synchronized (ConfigUtil.class) {
                  if(instance == null) {
                      instance = new ConfigUtil();
                  }
              }
          }
          return instance;
      }
  
      private RedisService redisService = SpringContextHolder.getBean(RedisService.class);
  
      /**
       * 获取参数
       * @param code
       */
      public Object getConfig(String code) {
          String key = RedisConstant.SYSTEM_CONFIG_KEY;
          Object o = redisService.hget(key, code);
          return Optional.ofNullable(o).orElse(null);
      }
  }
  