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Something clicked recently, after I compared a couple of scenarios of recently life.

The two cases have to do with extending your framework, especially on the bleeding edge.

Extending Java: Hibernate and XDoclet

Ben Ellingson has been working on an Adigio project that is pushing the edge with Hibernate 3 and XDoclet 2.

To get things working, both Hibernate 3, and the XDoclet 2 plugin had to be patched, resulting in our own builds.

Luckily, there are JIRA issues filed, and in the Hibernate 3 case a fix seems to have already been put in.

Extending Ruby: Rails

In another life, a Rails project needed to alter the way Rails did something. Rather than having to have a special jar file, or dependency, or anything like that, all that needed to be done was to re-open the classes that needed tweaking, and change the methods!

Having a system that allows open classes is a pleasure when it comes to making changes like this. So much cleaner!