By pelegri on Sep 11, 2006
The web tier of GlassFish is based on the Catalina architecture (from Tomcat 4.0) that provides a number of extension points. These extensions are implementation-specific but they are sometimes indispensable. Jean-Francois's latest entry provides an overview of the different extension points, check it out.
The mechanism for adding the extensions is very easy, starting with GlassFish V2 b17, which will be part of Milestone 2, later this month.