当您使用每一项不同的技术执行应用程序时，您将需要一种标准方法以了解通过您的TCP连接实际发送了多少信息。
As you execute an application with each different technology, you will want a standard way to see how much information is actually sent over your TCP connection.
依赖项注入——依赖项注入是用于将对象或组件连接在一起的一项技术。
Dependency injection — Dependency injection is a technique for wiring together objects or components.
这里仍然需要完成一项任务，把面向方面技术和应用程序中特定的点连接在一起。
This still leaves the task of connecting up the aspects to specific points in the application.
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