Tomcat Webscoket 实现

以tomcat的实现来熟悉java-websocket的规范。

一.初始流程

1. 基于SPI机制初始化

WebSocket Servlet Container Initializer (简称WsSci)

ServletContainerInitializers (SCIs) are registered via an entry in the file META-INF/services/javax.servlet.ServletContainerInitializer that must be included in the JAR file that contains the SCI implementation

tomcat-websocket-8.0.36.jar 包中的org.apache.tomcat.websocket.server.WsSci 遵循Servlet 3.0标准，并在META-INF/services/javax.servlet.ServletContainerInitializer文件中被指定，此机制即Java中的SPI机制。

2.创建WsServerContainer

上一步中最重要的一环为构造并配置了WsServerContainer.

其它细节

WsThreadFactory 直接