Tomcat - 源码分析Tomcat是如何处理一个Servlet请求的

拼搏现实的明天。 2023-02-14 06:52 53阅读 0赞

### 文章目录 ###

*  Tomcat中的NIO模型
 *  Servlet 请求处理分析
 *  Servlet请求处理流程示意图
 *  Servlet请求处理源码剖析
 *  Mapper 组件体系结构

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# Tomcat中的NIO模型 #

[Tomcat][] ： 8.5.55

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lhbmdzaGFuZ3dlaQ_size_16_color_FFFFFF_t_70 1]

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# Servlet 请求处理分析 #

一个servlet请求 --> 最终需要找到能够处理当前servlet请求的servlet实例 --> servlet.service()

主要流程如下：

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lhbmdzaGFuZ3dlaQ_size_16_color_FFFFFF_t_70 2]

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# Servlet请求处理流程示意图 #

NioEndpoint \# startInternal

Poller线程是追踪的入口

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lhbmdzaGFuZ3dlaQ_size_16_color_FFFFFF_t_70 3]

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# Servlet请求处理源码剖析 #

NioEndpoint \# startInternal

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lhbmdzaGFuZ3dlaQ_size_16_color_FFFFFF_t_70 4]

看下

public class Poller implements Runnable { }

那就看核心方法run

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# Mapper 组件体系结构 #

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lhbmdzaGFuZ3dlaQ_size_16_color_FFFFFF_t_70 5]

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[Tomcat]: https://blog.csdn.net/zhuiyisinian/article/details/105617138
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