# config/initializers/action_cache.rb

module ActionController::Caching::Actions::ClassMethods

  # ex) continue filter chain
  #
  #   caches_action :action_name, :continue => true
  #
  def caches_action(*actions)
    return unless cache_configured?
    options = actions.extract_options!
    around_filter(ActionController::Caching::Actions::ActionCacheFilter.new(:cache_path => options.delete(:cache_path), :continue => options.delete(:continue)), {:only => actions}.merge(options))
  end

end

class ActionController::Caching::Actions::ActionCacheFilter

  alias_method :before_origin, :before

  # ex) cancel action
  #
  #   def action_name
  #     if rendered_action_cache
  #       @performed_render = true
  #       return
  #     end
  #     ...
  #   end
  #
  def before(controller)
    result = before_origin(controller)
    if result == false && @options[:continue]
      controller.instance_eval { @performed_render = false }
      return true
    end
    return result
  end

end