The service selectorpattern extends the simple service proxy pattern and introduces the concept of routing service requests.
服务选择器模式对简单服务代理模式进行了扩展，引入了路由服务请求的概念。
2
Routing is determined in the same way as for the service selectorpattern and transformation is applied to a service request after routing has determined the target service and interface.
路由采用与服务选择器相同的方式确定，而路由后应用到服务请求的转换将确定目标服务和接口。
3
In keeping with the Reactor pattern, a Selector class is a multiplexor of Channels.