class method self.define_dispatcher_callbacks

# File actionpack/lib/action_controller/dispatcher.rb, line 8
      def define_dispatcher_callbacks(cache_classes)
        unless cache_classes
          # Development mode callbacks
          before_dispatch :reload_application
          after_dispatch :cleanup_application

          ActionView::Helpers::AssetTagHelper.cache_asset_timestamps = false
        end

        # Common callbacks
        to_prepare :load_application_controller do
          begin
            require_dependency 'application' unless defined?(::ApplicationController)
          rescue LoadError => error
            raise unless error.message =~ /application\.rb/
          end
        end

        if defined?(ActiveRecord)
          after_dispatch :checkin_connections
          to_prepare(:activerecord_instantiate_observers) { ActiveRecord::Base.instantiate_observers }
        end

        after_dispatch :flush_logger if Base.logger && Base.logger.respond_to?(:flush)

        to_prepare do
          I18n.reload!
        end
      end