gistfile1.rb

class EventController
    def initialize
        @event_hash = {}
    end

    def register_listener(event_name, lsr)
        @event_hash[event_name] ||= []
        @event_hash[event_name] << lsr
    end

    def method_missing(event_name, *args, &block)
        raise NoMethodError, "No method called #{sym} registered." if !@event_hash.has_key?(event_name)

#        @event_hash[event_name].each { |lsr| lsr.send(event_name, *args, &block) }
    end

    def unregister_listener(event_name, lsr)
        @event_hash[event_name].delete(lsr) if @event_hash[event_name]
    end
end