code: public void service(ServletRequest request, ServletResponse response) throws IOException, ServletException {
      WebAppServletInvocationEvent evt = null;
          if (notifyInvocationListeners) {
              evt = new WebAppServletInvocationEvent(this, getServletContext(), getServletAndFileName(), getFileName(), (HttpServletRequest) request,
                      (HttpServletResponse) response); // PK70152
      }
  
      service(request, response, evt);
    }
docs: /*
  @param request
  
  @param response
  
  @throws IOException