The IlvDiagrammerServletSupport class

The class IlvDiagrammerServletSupport is a subclass of IlvManagerServletSupport. This class implements the functionality of the JViews Diagrammer servlet but is not a servlet itself.
The purpose of IlvDiagrammerServletSupport is to let you build “multiplexing” servlets that can handle requests for images, but also other kinds of requests that call other parts of your application.
The class IlvDiagrammerServlet is a facade that forwards requests to the class IlvDiagrammerServletSupport.