Daniel F. Martinez has written and excellent article titled "DSL: Rolando dados com o Groovy (or DSL: Rolling dice with Groovy) which serves as good reference for those wanting to start creating DSLs with Groovy.

What I find great about his article is the way the DSL is "attached" into runtime: no categories, no builders, no complicated MP/metaClass hoops. He uses one of Groovy's new meta features: propertyMissing.

By hooking into propertyMissing he is able to add RPG-like dice rolling capabilities to Integers. Even though the article is written in Portuguese (which should be easily readable by any Spanish speaker too) the code examples and the way the article flows should help anyone understand what is going on.

Good work Daniel, keep those groovy entries coming!

Keep on Groovying!