How does the Tomcat container calls service() method?

Question

How does the Tomcat container calls service(ServletRequest req, ServletResponse res) method? Where can I look for implementation of this call?
How can I see how this req and res objects (that passed to service() method) are created?

Answer 1

Although the Tomcat Architecture page is in TODO status, there is at least a link to the UML sequence diagram of the request processing. Combining with Tomcat's source code, it is a good starting point.