API 超时之前返回结果 超时异常发邮件

public String handle(Function<Consumer<Object>, WebPortalMessageWrapper> processor, Consumer<Object> emailSendHandler) {
        CompletableFuture<String> future = CompletableFuture.supplyAsync(() -> {
            long start = System.currentTimeMillis();
            xxx x = processor.apply(xxx);

            if (System.currentTimeMillis() - start >= UPLOAD_TIMEOUT * 1000) {
                // send email (success or fail)
                emailSendHandler.accept(x);
                log.warn("Timeout when call TimeoutHandler.handler sub thread - {}", UPLOAD_TIMEOUT);
                return TIMEOUT_MESSAGE;
            }

            return x;
        }, taskExecutor).exceptionally(e -> {
            log.error("Error when call TimeoutHandler.handler sub thread, error={}", e.getMessage(), e);
            // send failure email
            emailSendHandler.accept(e.getMessage());
            return String.format(STATUS_FAILED_MESSAGE, e.getMessage());
        });

        try {
            return future.get(UPLOAD_TIMEOUT, TimeUnit.SECONDS);
        } catch (TimeoutException e) {
            log.warn("Timeout when call TimeoutHandler.handler");
            return TIMEOUT_MESSAGE;
        } catch (Exception e) {
            log.error("Error when call TimeoutHandler.handler, error={}", e.getMessage(), e);
            // send failure email
            emailSendHandler.accept(e.getMessage());
            return String.format(STATUS_FAILED_MESSAGE, e.getMessage());
        }
    }



@PostMapping(value = "xxx", produces = "application/json;charset=UTF-8")
    @ResponseBody
    public String saveTemplateData(xxx) {
        

        return timeoutHandler.handle(
                (emailSendHandler) -> this.saveTemplateData(xxx),
                (result) -> timeoutHandler.sendEmail(result, x));
    }