如何在Spring @Async方法中获取任务

Question

如何在Spring @Async方法中获取任务？因为我想返回FutureTask，但是futureTask的构造方法需要传递Runnable或Callable参数。

之前

@Component
public class ConversionProcessor {
    @Async
    public Future<String> convert() {
        //doing something

        return new AsyncResult<>("Hello");
    }
}

期望

@Component
public class ConversionProcessor {
    @Async
    public FutureTask convert() {
       //doing something

       return new FutureTask(); 
       // compiler error, 'cannot resolve constructor FutureTask()'
    }
}