code: package ca.uwaterloo.redynissvc.utils;
  
  import ca.uwaterloo.redynissvc.beans.ServiceConfig;
  import lombok.Getter;
  
  import java.io.File;
  import java.io.IOException;
  
  public class ConfigHelper
  {
      private static ConfigHelper instance;
      @Getter private ServiceConfig serviceConfig;
  
      private ConfigHelper(ServiceConfig serviceConfig)
      {
          this.serviceConfig = serviceConfig;
      }
  
      public static ConfigHelper getInstance(String configFilePath)
          throws IOException
      {
          if (null == instance)
          {
              ServiceConfig serviceConfig = Constants.MAPPER.readValue(new File(configFilePath), ServiceConfig.class);
              instance = new ConfigHelper(serviceConfig);
          }
  
          return instance;
      }
  }
  