What is the purpose of Valve in Tomcat?

In Tomcat, a Valve is a component used to perform operations in the request processing pipeline. Valves can be used to filter, modify, log requests, and more, either before they reach the Tomcat server or after they have been processed. Valves are similar to Filters and Interceptors, but Valve is more flexible and efficient, allowing direct manipulation of Tomcat’s internal structure. Valves can be configured and used in Tomcat’s server.xml file.