Facade和Gateway设计模式有什么区别？ [英] What is the difference between Facade and Gateway design patterns?

问题描述

或Facade == Gateway？

or Facade==Gateway?

推荐答案

在GoF书中查看门面以及Martin Fowler网关的另一个答案中的链接

Reviewing Facade in the GoF book and the link in another answer to Martin Fowler's Gateway, it appears that their focus is in opposite directions.

Facade为（一个或多个）外部客户端提供了复杂内部组件的简单统一视图;

Facade provides a simple uniform view of complex internals to (one or more)external clients;

网关提供了一个外部资源到应用程序内部的简单统一视图。

Gateway provides a simple uniform view of external resources to the internals of an application.

这个区别让我们专注于哪一个更重要在设计中：

This distinction lets us focus on which is more important in a design :

使用Facade，外部系统是我们的客户;如果外部接口更简单，最好增加面向内部的复杂性。

With the Facade, the external system is our customer; it is better to add complexity facing inwards if it makes the external interface simpler.

使用Gateway，内部系统是我们的客户;尽可能地帮助我们，即使外部更复杂。

With the Gateway, the internal system is our customer; give it all the help we can, even if the externals are more complex.

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