How best to modernize the 2002-era J2EE app?



I have this friend....


I have this friend who works on a java ee application (j2ee) application started in the early 2000's. Currently they add a feature here and there, but have a large codebase. Over the years the team has shrunk by 70%.


[Yes, the "i have this friend is". It's me, attempting to humorously inject teenage high-school counselor shame into the mix]


Java, Vintage 2002


The application uses EJB 2.1, struts 1.x, DAO's etc with straight jdbc calls (mixture of stored procedures and prepared statements). No ORM. For caching they use a mixture of OpenSymphony OSCache and a home-grown cache layer.


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[Yes, the "i have this friend is"


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