NOTE

Tomcat Container Hierarchy

Engine, Host, Context, Wrapper, request routing, and the hierarchical Tomcat container model.

JavaCreated 01/17/2020Updated 09/15/20261 min readhistorical

This is a historical learning note and may contain outdated or incomplete understanding.

Tomcat historically models request processing through a container hierarchy such as Engine → Host → Context → Wrapper.

Conceptually these layers select virtual host, web application/context, and target servlet while applying container pipeline/valve behavior.

Exact implementation classes evolve, but the useful architecture is hierarchical request routing plus lifecycle/configuration boundaries.