Software is too expensive to build cheaply…

Turns out that, with Struts 1.1. at least, this can be a bad thing to do. Why? You lose the parameters on the request.

Don Brown made a very good point about a gotcha with the IoC technique I demonstrated with Struts: it’s potentially not threadsafe.

IoC, aka dependency injection, is the current trend. The idea is simple: create your normal class, and rather than going and fetching things you might want (like datasources, factories, and so on), get them given to you instead. This greatly facilitates things like unit testing, because you’ve got a lot less dependencies to set up.
Struts [...]