Tomcat support is divided into the following sub-modules:

• tomcat-common:javaagent contains common type instrumentation, advice helper classes and abstract tracer used by the javaagent modules of all supported Tomcat versions
• tomcat-7.0:javaagent applies Tomcat request handler instrumentation for versions [7, 10)
• tomcat-10.0:javaagent applies Tomcat request handler instrumentation for versions [10,)

Instrumentations in tomcat-7.0 and tomcat-10.0 are mutually exclusive, this is guaranteed by tomcat-10.0 instrumentation checking that its Request class uses jakarta.servlet classes, and the tomcat-7.0 module doing the opposite check.