code: @Override
      public void nextTuple()
      {
          if (this.reloadConfig && this.watcher != null)
          {
              Map<String, Object> reloadedConfig = null;
  
              try
              {
                  reloadedConfig = this.watcher.readIfUpdated();
              }
              catch (IOException ex)
              {
                  String logFormat = "Config file reload failed. Skip reload config.";
                  logger.warn(logFormat, ex);
              }
  
              if (reloadedConfig != null)
              {
                  onUpdate(reloadedConfig);
              }
          }
  
          onNextTuple();
      }
docs: Continually called method by Storm that gets next message.<br>
  <br>
  When spout is running, this method is endlessly called.