Engine
来源:互联网 发布:霍元甲 大力士 知乎 编辑:程序博客网 时间:2024/04/19 19:05
An Engine is a Container that represents the entire Catalina servlet engine. It is useful in the following types of scenarios:
- You wish to use Interceptors that see every single request processed by the entire engine.
- You wish to run Catalina in with a standalone HTTP connector, but still want support for multiple virtual hosts.
The child containers attached to an Engine are generally implementations of Host (representing a virtual host) or Context (representing individual an individual servlet context), depending upon the Engine implementation.
If used, an Engine is always the top level Container in a Catalina hierarchy. Therefore, the implementation's setParent()
method should throw IllegalArgumentException
.
Engine下可以配置多个虚拟主机Virtual Host,每个虚拟主机都有一个域名
当Engine获得一个请求时,它把该请求匹配到某个Host上,然后把该请求交给该Host来处理 Engine有一个默认虚拟主机,当请求无法匹配到任何一个Host上的时候,将交给该默认Host来处理
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