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# RPC
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## 概念
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**RPC**: RPC是远程过程调用（Remote Procedure Call）的缩写形式。SAP系统RPC调用的原理其实很简单，有一些类似于三层构架的C/S系统，第三方的客户程序通过接口调用SAP内部的标准或自定义函数，获得函数返回的数据进行处理后显示或打印。
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**跨进程交互形式**: Restful、WebService、http、基于DB做的数据交换、基于MQ做数据交换、RPC
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## 图解交互形式
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在RPC中
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Server: Provider、服务提供者
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Client: Consumer、服务消费者
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Stub: 存根、服务描述
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## 整体架构
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