在Spring中使用deferredResult在后台运行任务,而不使用冻结浏览器作为客户端

我实现了一个简单的 Rest service 我想用它来测试 deferredResult 从 Spring

1. 试验

我很感兴趣为什么在浏览器(客户端)我需要等待8秒。不是吗 deferedResult Java 9 反应流呢?

@RestController("/")
public class Controller {

    @GetMapping
    public DeferredResult<Person> test() {
        System.out.println("TEST");
        DeferredResult<Person> result = new DeferredResult<>();
        CompletableFuture.supplyAsync(this::test1)
                .whenCompleteAsync((res, throwable) -> {
                    System.out.println("TEST AFTER DEFERRED RESULT");
                    result.setResult(res);
                });
        System.out.println("TEST 1");
        return result;
    }

    private Person test1() {
        try {
            Thread.sleep(8000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        return new Person("michal", 20);
    }
}

class Person implements Serializable {
    private String name;
    private int age;
}