code: public static void setDispatchedPage(ServletRequest request, String dispatchedPage) {
  		if(logger.isLoggable(Level.FINE)) logger.log(
  			Level.FINE,
  			"request={0}, dispatchedPage={1}",
  			new Object[] {
  				request,
  				dispatchedPage
  			}
  		);
  		request.setAttribute(DISPATCHED_PAGE_REQUEST_ATTRIBUTE, dispatchedPage);
  	}
docs: Sets the current-thread dispatched page.