在spring boot rest webservices中，如何在给定时间后取消进程并返回失败响应？

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter</artifactId>
</dependency>

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.concurrent.*;

@RestController
@RequestMapping("/api")
public class MyController {

    private ScheduledExecutorService executorService = Executors.newScheduledThreadPool(1);

    @GetMapping("/cancel-process")
    public CompletableFuture<String> cancelProcess() {
        CompletableFuture<String> future = new CompletableFuture<>();

        // 设置超时时间为5秒
        long timeout = 5;
        TimeUnit timeUnit = TimeUnit.SECONDS;

        ScheduledFuture<?> scheduledFuture = executorService.schedule(() -> {
            // 执行需要取消的进程
            // ...

            // 如果进程未完成，取消任务并返回失败响应
            future.complete("Process cancelled due to timeout");
        }, timeout, timeUnit);

        // 在CompletableFuture中添加一个回调，用于在任务完成后取消定时任务
        future.whenComplete((result, throwable) -> {
            if (!scheduledFuture.isDone()) {
                scheduledFuture.cancel(true);
            }
        });

        return future;
    }
}