如果您可以控制服务，可以考虑向您的调用者返回一个惟一的限定符，使用一种后来向不同服务询问请求状态的方式。
If you have control over the service, consider returning a unique identifier to your callers that provides them with a way of later asking a different service method about the status of the request.
另外，好奇的学生将在此时开始询问关于public和private之类的访问修饰符。
Also, curious students begin asking about access modifiers like public and private at this point.
应用推荐