public JsonResponse<ApiResult> delete$all() {
        try {
            failureUrlService.deleteAll(failureUrlPager);
            failureUrlPager.clear();
            saveInfo(messages -> messages.addSuccessFailureUrlDeleteAll(GLOBAL));
        } catch (final Exception e) {
            logger.warn("Failed to process a request.", e);

    public HtmlResponse deleteall() {
        verifyToken(this::asListHtml);
        failureUrlService.deleteAll(failureUrlPager);
        failureUrlPager.clear();
        saveInfo(messages -> messages.addSuccessFailureUrlDeleteAll(GLOBAL));
        return redirect(getClass());
    }

    // ===================================================================================