caching method calls

cache_poc.rb

    cache :read,
          invalidate_on: [:update, :update_cloud_director_contact, :update_cloud_service, :update_cc_payment_info],
          key: :account_id

    # Module overrides read to look like this:
    module Cacheable
      def cache(methods_to_cache, methods_to_invalidate, key)
        methods_to_cache.each do |method|
          define_method method do |*args|
            cache_the_shit(*args)
          end
        end
      end
    end

    def read(*params)
      cached_id_value = params[cache_id]
      cache_result = cache.fetch(cached_id_value)
      return cache_result if cache_result
      cache[cache_id] = super
    end

    def update(*params)
      cached_id_value = params[cache_id]
      cache.clear(cached_id_value)
      super
    end