蚂蚁金服开源-SofaRpc源码学习篇

た入场券 2023-01-23 14:58 9阅读 0赞

### 文章目录 ###

*  官网
 *  基本流程
 *  SofaRpc学习
 *  代码入手
 *   *  服务端-发布过程
     *  服务端-构造执行链
     *  服务端-注册到注册中心
     *  客户端
     *  客户端-生成代理类
     *  客户端-连接初始化
     *   *  netty
     *  客户端-得到服务端列表
     *  客户端-创建代理类
     *  客户端-具体调用
     *  客户端-解码
     *  客户端-配置接口，方法用处
     *  下一篇

# 官网 #

*  [SOFARPC][]

# 基本流程 #

[https://www.sofastack.tech/projects/sofa-rpc/client-invoke-flow/][https_www.sofastack.tech_projects_sofa-rpc_client-invoke-flow]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70]

最简单：一个service，一个client，一个注册中心。  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70 1]  
service注册自己到registry注册中心，包括service-name,还有相应的ip，port，然后client去监听注册中心，然后拿到service的地址，调用的时候会通过生成一个代理，去invoke调用结果返回

# SofaRpc学习 #

# 代码入手 #

[我们在项目里面先实现这个简单的demo，然后debug进去跟着学习。][demo_debug]

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70 2]  
这一块没什么谈的，端口号，ip，对应的协议，然后开启一个线程去监听。

## 服务端-发布过程 ##

服务提供者配置 com.alipay.sofa.rpc.config.ProviderConfig\#export

com.alipay.sofa.rpc.bootstrap.DefaultProviderBootstrap\#export  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70 3]  
会根据接口，uid，协议拼接成一个key，来保证同一个服务只发布一次。  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70 4]

## 服务端-构造执行链 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70 5]  
**com.alipay.sofa.rpc.filter.FilterChain\#FilterChain**

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70 6]  
**com.alipay.sofa.rpc.config.AbstractInterfaceConfig\#filter**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70 7]  
**com.alipay.sofa.rpc.filter.FilterChain\#selectActualFilters**![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70 8]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70 9]  
蚂蚁自己封装的扩展类，然后通过ExtensionLoader去加载扩展点

## 服务端-注册到注册中心 ##

**初始化过程**

RegistryFactory.getRegistry(registryConfig);

**com.alipay.sofa.rpc.registry.RegistryFactory\#getRegistry**

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70 10]

不同注册中心会有不同的扩展点，然后根据不同的扩展点去加载注册中心  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70 11]  
**注册到注册中心**

// 注册到注册中心
    providerConfig.setConfigListener(new ProviderAttributeListener());
    register()；

**register()**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70 12]  
会根据不同的配置去进行注册相应的配置

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70 13]  
到这里完成第一步service注册到registry

## 客户端 ##

看代码  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70 14]  
一样是有配置，服务service-name，协议，超时时间，对于的接口的类，注意这些，**为下面讲解埋下伏笔**！！！

## 客户端-生成代理类 ##

**com.alipay.sofa.rpc.config.ConsumerConfig\#refer**

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70 15]  
也是为了避免客户端重复发布

**cluster.init();**

初始化过程  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70 16]

**com.alipay.sofa.rpc.client.LoadBalancerFactory\#getLoadBalancer(com.alipay.sofa.rpc.bootstrap.ConsumerBootstrap)**

负载均衡下面单独一个点展开讲

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70 17][]  
这一块代码的实现。

## 客户端-连接初始化 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70 18]

**com.alipay.sofa.rpc.client.AllConnectConnectionHolder\#doReconnect**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70 19]  
这一块netty的可用性重试

### netty ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70 20]  
我们可以看到底层使用netty进行通信，在下面一些解码中埋下伏笔。

## 客户端-得到服务端列表 ##

**List all = consumerBootstrap.subscribe();**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70 21]  
初始化服务端连接（建立长连接)

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70 22]  
ProviderInfo 抽象的服务提供列表

**com.alipay.sofa.rpc.client.AllConnectConnectionHolder\#addNode**

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70 23]  
经常面试遇到CountDownLatch使用，这里就有

**com.alipay.sofa.rpc.client.AllConnectConnectionHolder\#initClientRunnable  
— >  
com.alipay.sofa.rpc.client.AllConnectConnectionHolder\#initClientRunnable**

这里是获取长连接的，然后使用map往里面塞服务者配置以及链接  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70 24]

## 客户端-创建代理类 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70 25]

## 客户端-具体调用 ##

**com.alipay.sofa.rpc.filter.ConsumerInvoker\#invoke**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70 26]  
**com.alipay.sofa.rpc.client.AbstractCluster\#sendMsg**

doSendMsg(providerInfo, clientTransport, request)

**同步调用**  
**com.alipay.sofa.rpc.transport.http.AbstractHttp2ClientTransport\#syncSend**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70 27]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70 28]  
看到没有底层通过netty去发送

## 客户端-解码 ##

这里就涉及netty解码  
**com.alipay.sofa.rpc.transport.http.AbstractHttpClientHandler\#onResponse**  
**com.alipay.sofa.rpc.transport.http.SyncInvokeClientHandler\#doOnResponse**

decode(response);

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70 29]  
会把一些上下文塞进去

## 客户端-配置接口，方法用处 ##

com.alipay.sofa.rpc.core.request.SofaRequest  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70 30]

服务端拿到这个配置的类名，还有方法，参数进行反射的调用  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70 31]

## 下一篇 ##

*  [SofaRpc源码学习篇-netty以及跟dubbo骚操作，负载均衡][SofaRpc_-netty_dubbo]

[SOFARPC]: https://www.sofastack.tech/projects/sofa-rpc
[https_www.sofastack.tech_projects_sofa-rpc_client-invoke-flow]: https://www.sofastack.tech/projects/sofa-rpc/client-invoke-flow/
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[demo_debug]: https://www.sofastack.tech/projects/sofa-rpc/getting-started-with-rpc/
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[SofaRpc_-netty_dubbo]: https://blog.csdn.net/weixin_38336658/article/details/118879343