class Jcompiler
  def self.code
    "{\"a\":\"b\"}"
  end
end

class JcompilerHandler
  cattr_accessor :default_format
  self.default_format = Mime::JSON

  def self.call(template)
    %{Jcompiler.code}
  end
end

ActionView::Template.register_template_handler :jcompiler, JcompilerHandler