I bet that the "modern" application, given its 20 years vintage, is probably a J2EE application running on whatever is the modern incarnation of IBM Websphere a

I bet that the "modern" application, given its 20 years vintage, is probably a J2EE application running on whatever is the modern incarnation of IBM Websphere and it was written as a mind-boggling soup of EJB 2.x Entity and Session beans.