code: private void handleContentLength(Event event) {
          if (event.getContent() == null) {
              return;
          }
  
          if (maxContentLength == -1 || event.getContent().length() <= maxContentLength) {
              return;
          }
  
          if (maxContentLength < CUT_START_TAG.length() + CUT_END_TAG.length()) {
              event.setContent("");
              event.setContentCut(true);
              return;
          }
  
          int contentLength = maxContentLength - CUT_START_TAG.length() - CUT_END_TAG.length();
          event.setContent(CUT_START_TAG + event.getContent().substring(0, contentLength) + CUT_END_TAG);
          event.setContentCut(true);
      }
docs: Handle content length.
  
  @param event
  the event