The intermediary itself can become both a bottleneck and single point of failure for the service invocation. 中介体将成为服务调用的瓶颈和唯一的失败点。
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。