Background task in controller

BackgroundController.java

        @RequestMapping("/job/start")
        public String start() throws ExecutionException, InterruptedException {

            ExecutorService executor = Executors.newSingleThreadExecutor();
            executor.submit(() -> {
                try {
                    System.out.println("BGController.before");
                    Thread.sleep(10000);
                    System.out.println("BGController.after");
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            });

            return "start";
        }