Support "chain" relation flow strategy and "web-context-unify" in Spring web adapter #1314
Description
Issue Description
Type: feature request
Describe what happened (or what feature you want)
The legacy web servlet CommonFilter supports "chain" relation flow strategy, where entrance contexts are separated by different URLs. This feature has not been supported yet in sentinel-spring-webmvc-adapter. We may also support this in the Spring web adapter and preserve a web-context-unify config item to control this (by default true).
Discussions and contributions are welcomed!
旧的 Web servlet CommonFilter 支持链路限流，通过入口 URL 区分不同链路（入口），并支持归一入口（不区分链路）以节省内存占用。sentinel-spring-webmvc-adapter 目前还不支持这个特性，社区可以考虑进行支持，但仍然要提供 web-context-unify 配置项控制是否归一入口（默认为 true 以节省内存占用），欢迎社区贡献。