这意味着要么客户端必须将消息定位到网关具有的角色，要么网关必须作为最终接受方以便进行安全处理。
This means that either the client must target the message to the role the gateway is acting in or the gateway must act as the ultimate receiver for the purpose of the security processing.
例如，是否有必要通过类似于代理的中间件系统来把客户端身份传递到服务实现的最终提供者？
For example, is there a need to propagate client identity through intermediate systems such as brokers to the end-providers of service implementations?
最终结果是如果使用了某个内部模块，那么客户端第一次找到它时是在出现编译故障或运行时故障时，因为方法签名被修改了。
The result is that if an internal module is used, the first time the client finds out is when either a compile failure occurs — or when a run time failure occurs because the method signature changed.
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