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Vendor easyswoole
Package rpc
Short Description An efficient swoole framework
License Apache-2.0
Homepage https://www.easyswoole.com/

Keywords framework async swoole easyswoole

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Example code of easyswoole/rpc

Informations about the package rpc

EasySwoole RPC

很多传统的Phper并不懂RPC是什么，RPC全称Remote Procedure Call，中文译为远程过程调用,其实你可以把它理解为是一种架构性上的设计，或者是一种解决方案。例如在某庞大商场系统中，你可以把整个商场拆分为N个微服务（理解为N个独立的小模块也行），例如：

订单系统
用户管理系统
商品管理系统
等等

那么在这样的架构中，就会存在一个Api网关的概念，或者是叫服务集成者。我的Api网关的职责，就是把一个请求，拆分成N个小请求，分发到各个小服务里面，再整合各个小服务的结果，返回给用户。例如在某次下单请求中，那么大概发送的逻辑如下：

Api网关接受请求
Api网关提取用户参数，请求用户管理系统，获取用户余额等信息，等待结果
Api网关提取商品参数，请求商品管理系统，获取商品剩余库存和价格等信息，等待结果。
Api网关融合用户管理系统、商品管理系统的返回结果，进行下一步调用（假设满足购买条件）
Api网关调用用户管理信息系统进行扣款，调用商品管理系统进行库存扣减，调用订单系统进行下单（事务逻辑和撤回可以用请求id保证，或者自己实现其他逻辑调度）
APi网关返回综合信息给用户

而在以上发生的行为，就称为远程过程调用。而调用过程实现的通讯协议可以有很多，比如常见的HTTP协议。而EasySwoole RPC采用自定义短链接的TCP协议实现，每个请求包，都是一个JSON，从而方便实现跨平台调用。

什么是服务熔断？

粗暴来理解，一般是某个服务故障或者是异常引起的，类似现实世界中的‘保险丝’，当某个异常条件被触发，直接熔断整个服务，而不是一直等到此服务超时。

什么是服务降级?

粗暴来理解，一般是从整体负荷考虑，就是当某个服务熔断之后，服务器将不再被调用，此时客户端可以自己准备一个本地的fallback回掉，返回一个缺省值，这样做，虽然服务水平下降，但好歹，比直接挂掉要强。服务降级处理是在客户端实现完成的，与服务端没有关系。

什么是服务限流？

粗暴来理解，例如某个服务器最多同时仅能处理100个请求，或者是cpu负载达到百分之80的时候，为了保护服务的稳定性，则不在希望继续收到新的连接。那么此时就要求客户端不再对其发起请求。因此EasySwoole RPC提供了NodeManager接口，你可以以任何的形式来监控你的服务提供者，在getNodes方法中，返回对应的服务器节点信息即可。

EasySwoole RPC执行流程

Composer安装

rpc配置

独立使用

EasySwoole中使用

All versions of rpc with dependencies

PHP Build Version

Package Version

Version 5.0.5 Release 02. Aug 2021
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Download latest version of rpc from vendor easyswoole

Requires php Version >=7.1.0
ext-swoole Version >=4.4.5
ext-json Version >=1.0
ext-openssl Version >=7.1
easyswoole/spl Version ^1.0
easyswoole/utility Version ^1.0
easyswoole/component Version ^2.0
ext-sockets Version *

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