Domain Specific Languages (DSLs) are often littered with the accidental complexity of the host language. Have you ever seen a supposedly “friendly” language expression like “ride(minutes(10)).on(bus).towards(Basel)”. The newest version of Groovy contains a language feature that aims to eliminate the noise of all those extra periods and parenthesis, so that your DSL looks more like “ride 10.minutes on bus towards Basel”. This article shows you step-by-step how to use Groovy Command Expressions and plain old metaprogramming to write just this DSL, and also offers advice on when, and when not, to use this new language feature.
The full article is available over on the Canoo Blog: http://www.canoo.com/blog/2011/12/08/the-art-of-groovy-command-expressions-in-dsls/
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Until next time...
Thursday, December 8, 2011
The Art of Groovy Command Expressions in DSLs
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