Reactor Netty-响应式编程-010

 🤗 ApiHug × {Postman|Swagger|Api...} = 快↑ 准√ 省↓

1. GitHub - apihug/apihug.com: All abou the Apihug   
2. apihug.com: 有爱，有温度，有质量，有信任
3. ApiHug - API design Copilot - IntelliJ IDEs Plugin | Marketplace

为什么不直接上来就 Netty 或者 Spring WebFlux ?

出于几点考虑：

1. 本身 Netty 学习曲线稍微陡峭
2. Spring WebFlux 封装很多细节

所以选择一个 Reactor --> Reactor Netty --> Spring WebFlux 这样一个渐进的线路。

Reactor Netty 官方文档open in new window,最新资料参考官网更新, 学习例子： reactor-netty-demo 学习open in new window。

#关于

Suited for Microservices Architecture, Reactor Netty offers backpressure-ready network engines for HTTP (including Websockets), TCP, and UDP.

适合于微服务架构，Reactor Netty为HTTP（包括Websocket），TCP和UDP提供了支持背压的网络引擎。

#前提

Reactor Netty需要运行在Java 8 及以上的版本上。

它需要依赖于以下组件：

1. Reactive Streams v1.0.4
2. Reactor Core v3.x
3. Netty v4.1.x

#项目依赖

都走BOM 走了非常简单：

dependencies {
  // import a BOM
  implementation platform('io.projectreactor:reactor-bom:2020.0.21') 

  // define dependencies without versions
  implementation 'io.projectreactor.netty:reactor-netty-core' 
  implementation 'io.projectreactor.netty:reactor-netty-http'
}

依赖关系如下：

------------------------------------------------------------
| BOM 依赖
------------------------------------------------------------
+--- io.projectreactor:reactor-bom:2020.0.21
|    +--- io.projectreactor.netty:reactor-netty-core:1.0.21 (c)
|    +--- io.projectreactor.netty:reactor-netty-http:1.0.21 (c)
|    +--- io.projectreactor:reactor-core:3.4.21 (c)
|    \--- org.reactivestreams:reactive-streams:1.0.4 (c)
------------------------------------------------------------
| 下面是具体版本
------------------------------------------------------------
+--- io.projectreactor.netty:reactor-netty-core -> 1.0.21
|    +--- io.netty:netty-handler:4.1.79.Final
|    |    +--- io.netty:netty-common:4.1.79.Final
|    |    +--- io.netty:netty-resolver:4.1.79.Final
|    |    |    \--- io.netty:netty-common:4.1.79.Final
|    |    +--- io.netty:netty-buffer:4.1.79.Final
|    |    |    \--- io.netty:netty-common:4.1.79.Final
|    |    +--- io.netty:netty-transport:4.1.79.Final
|    |    |    +--- io.netty:netty-common:4.1.79.Final
|    |    |    +--- io.netty:netty-buffer:4.1.79.Final (*)
|    |    |    \--- io.netty:netty-resolver:4.1.79.Final (*)
|    |    +--- io.netty:netty-transport-native-unix-common:4.1.79.Final
|    |    |    +--- io.netty:netty-common:4.1.79.Final
|    |    |    +--- io.netty:netty-buffer:4.1.79.Final (*)
|    |    |    \--- io.netty:netty-transport:4.1.79.Final (*)
|    |    \--- io.netty:netty-codec:4.1.79.Final
|    |         +--- io.netty:netty-common:4.1.79.Final
|    |         +--- io.netty:netty-buffer:4.1.79.Final (*)
|    |         \--- io.netty:netty-transport:4.1.79.Final (*)
|    +--- io.netty:netty-handler-proxy:4.1.79.Final
|    |    +--- io.netty:netty-common:4.1.79.Final
|    |    +--- io.netty:netty-buffer:4.1.79.Final (*)
|    |    +--- io.netty:netty-transport:4.1.79.Final (*)
|    |    +--- io.netty:netty-codec:4.1.79.Final (*)
|    |    +--- io.netty:netty-codec-socks:4.1.79.Final
|    |    |    +--- io.netty:netty-common:4.1.79.Final
|    |    |    +--- io.netty:netty-buffer:4.1.79.Final (*)
|    |    |    +--- io.netty:netty-transport:4.1.79.Final (*)
|    |    |    \--- io.netty:netty-codec:4.1.79.Final (*)
|    |    \--- io.netty:netty-codec-http:4.1.79.Final
|    |         +--- io.netty:netty-common:4.1.79.Final
|    |         +--- io.netty:netty-buffer:4.1.79.Final (*)
|    |         +--- io.netty:netty-transport:4.1.79.Final (*)
|    |         +--- io.netty:netty-codec:4.1.79.Final (*)
|    |         \--- io.netty:netty-handler:4.1.79.Final (*)
|    +--- io.netty:netty-resolver-dns:4.1.79.Final
|    |    +--- io.netty:netty-common:4.1.79.Final
|    |    +--- io.netty:netty-buffer:4.1.79.Final (*)
|    |    +--- io.netty:netty-resolver:4.1.79.Final (*)
|    |    +--- io.netty:netty-transport:4.1.79.Final (*)
|    |    +--- io.netty:netty-codec:4.1.79.Final (*)
|    |    +--- io.netty:netty-codec-dns:4.1.79.Final
|    |    |    +--- io.netty:netty-common:4.1.79.Final
|    |    |    +--- io.netty:netty-buffer:4.1.79.Final (*)
|    |    |    +--- io.netty:netty-transport:4.1.79.Final (*)
|    |    |    \--- io.netty:netty-codec:4.1.79.Final (*)
|    |    \--- io.netty:netty-handler:4.1.79.Final (*)
|    +--- io.netty:netty-resolver-dns-native-macos:4.1.79.Final
|    |    \--- io.netty:netty-resolver-dns-classes-macos:4.1.79.Final
|    |         +--- io.netty:netty-common:4.1.79.Final
|    |         +--- io.netty:netty-resolver-dns:4.1.79.Final (*)
|    |         \--- io.netty:netty-transport-native-unix-common:4.1.79.Final (*)
|    +--- io.netty:netty-transport-native-epoll:4.1.79.Final
|    |    +--- io.netty:netty-common:4.1.79.Final
|    |    +--- io.netty:netty-buffer:4.1.79.Final (*)
|    |    +--- io.netty:netty-transport:4.1.79.Final (*)
|    |    +--- io.netty:netty-transport-native-unix-common:4.1.79.Final (*)
|    |    \--- io.netty:netty-transport-classes-epoll:4.1.79.Final
|    |         +--- io.netty:netty-common:4.1.79.Final
|    |         +--- io.netty:netty-buffer:4.1.79.Final (*)
|    |         +--- io.netty:netty-transport:4.1.79.Final (*)
|    |         \--- io.netty:netty-transport-native-unix-common:4.1.79.Final (*)
|    \--- io.projectreactor:reactor-core:3.4.20 -> 3.4.21
|         \--- org.reactivestreams:reactive-streams:1.0.4
------------------------------------------------------------
| HTTP
------------------------------------------------------------
+--- io.projectreactor.netty:reactor-netty-http -> 1.0.21
|    +--- io.netty:netty-codec-http:4.1.79.Final (*)
|    +--- io.netty:netty-codec-http2:4.1.79.Final
|    |    +--- io.netty:netty-common:4.1.79.Final
|    |    +--- io.netty:netty-buffer:4.1.79.Final (*)
|    |    +--- io.netty:netty-transport:4.1.79.Final (*)
|    |    +--- io.netty:netty-codec:4.1.79.Final (*)
|    |    +--- io.netty:netty-handler:4.1.79.Final (*)
|    |    \--- io.netty:netty-codec-http:4.1.79.Final (*)
|    +--- io.netty:netty-resolver-dns:4.1.79.Final (*)
|    +--- io.netty:netty-resolver-dns-native-macos:4.1.79.Final (*)
|    +--- io.netty:netty-transport-native-epoll:4.1.79.Final (*)
|    +--- io.projectreactor.netty:reactor-netty-core:1.0.21 (*)
|    \--- io.projectreactor:reactor-core:3.4.20 -> 3.4.21 (*)

#参考

1. Reactor Netty 官方文档open in new window
2. reactor-netty-demo 学习open in new window
3. Reactor Netty Workshopopen in new window
4. reactor-netty API