The Mapper pattern is a way to direct a bounded infinite set of resource requests to a single physical point of code.

Mapper模式特点如下：将无限的资源请求转向一个单独的物理节点。

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This single point of access provides a simple way of enforcing service invocation contracts, allowing for controlling and metering the access to the component services.

单一访问入口是确保服务调用契约的一种简单而有效的方式，使能够我们控制和测量队成员服务的访问。

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A single point of contact in the office or on location ensures strong customer support every step of the way.

在办公室或现场的单点联系保证了在每个阶段都能客户实现强有力的支持。

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If the FDA can point to a single contaminated piece of farmland and explain what went wrong, it will go a long way toward ensuring that the spinach is safe in the future.

FORBES: Magazine Article

And while there might be some ivory tower views that the way to do this is the single purchase of a game that has driven the industry up until this point in time, new methods will come to market and the successful models will level up and help drive the development of the next round of gaming.

FORBES: EA Take The Real Racing Line To Understand Freemium Mobile Games