Clojure Magic: proxy and proxy-super
Clojure is fun and Clojure macros are even more fun to use and really useful for developing domain specific languages. You can do amazing things using macros once you get used to them. This post describes how we can use Clojure proxy and proxy-super in combination with macros to implement DSLs which needs interactions between both Java and Clojure.
Recently I was developing DSL for Apache Storm as an experiment and had to bridge Storm’s Java API and Clojure. There is a Clojure DSL available for Storm in Storm project itself. But I wanted to implement DSL similar to popular stream processing language StreamIt. I mainly followed existing Storm Clojure DSL implementation and built my DSL based techniques used in that.
Existing Storm Clojure DSL is also done by bridging Storm’s Java API and Clojure and it uses combination of Java interfaces and Clojure reify to allow users to define
Continue reading →