分布式之Netty介绍与实战(三)--Netty线程模型解析

谁借莪１个温暖的怀抱￠ 2022-04-22 06:20 276阅读 0赞

[分布式之Netty介绍与实战(一)–Java IO与NIO][Netty_Java IO_NIO]

[分布式之Netty介绍与实战(二)–Netty编程实践][Netty_Netty]

[分布式之Netty介绍与实战(三)–Netty线程模型解析][Netty_Netty 1]

[分布式之Netty介绍与实战(四)–Netty编解码编程实战][Netty_Netty 2]

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# Reactor模式及其与Netty的对应关系 #

## Reactor模式 ##

*  Douglas C. Schmidt 1995年提出  
    An Object Behavioral Pattern for Demultiplexing and Dispatching Handles for Synchronous Events
 *  Scalable IO in Java - Doug Lea  
    [http://gee.cs.oswego.edu/dl/cpjslides/nio.pdf][http_gee.cs.oswego.edu_dl_cpjslides_nio.pdf]  
    基于Java IO对Reactor模式进行阐述
 *  NIO网络框架的典型模式
 *  Mina、Netty、Cindy都是此模式的实现

### Reactor模式 - Douglas ###

![在这里插入图片描述][20181102201908855.png]

### Reactor模式 - Doug Lea ###

*  三种形式
    
     *  单线程Reactor
     *  多线程Reactor
     *  Multiple Reactor

### Reactor模式 - Basic ###

![在这里插入图片描述][20181102202512696.png]

### Reactor模式 – MultiThread Reactor ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3o3ODU0OTUyOTU_size_16_color_FFFFFF_t_70]

### Reactor模式 – Multiple Reactors ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3o3ODU0OTUyOTU_size_16_color_FFFFFF_t_70 1]

### Reactor模式 – 其他形式-主从Reactor ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3o3ODU0OTUyOTU_size_16_color_FFFFFF_t_70 2]

## Netty与Reactor模式 ##

*  Netty实现了哪些形式的Reactor模式了？
    
     *  单线程Reactor？
     *  多线程Reactor？
     *  Multiple Reactor？
     *  主从Reactor？  
        ![在这里插入图片描述][20181102203757203.png]

# Netty EventLoop源码解析 #

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3o3ODU0OTUyOTU_size_16_color_FFFFFF_t_70 3]

## EventExecutor视图 ##

1.  EventExecutorGroup是不干什么事情的，当收到一个请求后，他就调用next()获得一个它里面的EventExcutor，再调用executor的方法；
2.  EventExecutorGroup里面有一个EventExcutor数组，保存多个EventExcutor；
3.  next():EventExecutorChooser.choose()定义选择EventExcutor的策略

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3o3ODU0OTUyOTU_size_16_color_FFFFFF_t_70 4]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3o3ODU0OTUyOTU_size_16_color_FFFFFF_t_70 5]![在这里插入图片描述][2018110221151843.png]![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3o3ODU0OTUyOTU_size_16_color_FFFFFF_t_70 6]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3o3ODU0OTUyOTU_size_16_color_FFFFFF_t_70 7]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3o3ODU0OTUyOTU_size_16_color_FFFFFF_t_70 8]![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3o3ODU0OTUyOTU_size_16_color_FFFFFF_t_70 9]![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3o3ODU0OTUyOTU_size_16_color_FFFFFF_t_70 10]![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3o3ODU0OTUyOTU_size_16_color_FFFFFF_t_70 11]![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3o3ODU0OTUyOTU_size_16_color_FFFFFF_t_70 12]  
EventLoop整体结构

*  NioEventLoop创建分析
 *  NioEventLoop启动流程分析
 *  NioEventLoop执行流程分析

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3o3ODU0OTUyOTU_size_16_color_FFFFFF_t_70 13]

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3o3ODU0OTUyOTU_size_16_color_FFFFFF_t_70 14]![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3o3ODU0OTUyOTU_size_16_color_FFFFFF_t_70 15]  
![在这里插入图片描述][2018110221492923.png]![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3o3ODU0OTUyOTU_size_16_color_FFFFFF_t_70 16]

[Netty_Java IO_NIO]: https://blog.csdn.net/z785495295/article/details/83477789
[Netty_Netty]: https://blog.csdn.net/z785495295/article/details/83650052
[Netty_Netty 1]: https://blog.csdn.net/z785495295/article/details/83660993
[Netty_Netty 2]: https://blog.csdn.net/z785495295/article/details/83721048
[http_gee.cs.oswego.edu_dl_cpjslides_nio.pdf]: http://gee.cs.oswego.edu/dl/cpjslides/nio.pdf
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