NOTE
Tomcat Request Processing: Source View
From connector protocol handling through container mapping/pipeline to servlet invocation, described without freezing one Tomcat version's stack.
This is a historical learning note and may contain outdated or incomplete understanding.
At a conceptual source level, a request moves through:
- connector/protocol processing and HTTP parsing;
- creation/adaptation of request/response objects;
- mapping into Engine/Host/Context/Wrapper;
- container pipeline/filters/security/application dispatch;
- servlet/framework invocation;
- response encoding and socket write.
Threading differs with connector/runtime configuration, but application code must not block event/protocol machinery unexpectedly. When tracing exact code, pin the analysis to one Tomcat release because method names/classes change.