module ActionController # Dispatches requests to the appropriate controller and takes care of # reloading the app after each request when Dependencies.load? is true. class Dispatcher class << self def define_dispatcher_callbacks(cache_classes) unless cache_classes unless self.middleware.include?(ActionDispatch::Reloader) self.middleware.insert_after(ActionDispatch::Failsafe, ActionDispatch::Reloader) end ActionView::Helpers::AssetTagHelper.cache_asset_timestamps = false end if defined?(ActiveRecord) 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 # Add a preparation callback. Preparation callbacks are run before every # request in development mode, and before the first request in production # mode. # # An optional identifier may be supplied for the callback. If provided, # to_prepare may be called again with the same identifier to replace the # existing callback. Passing an identifier is a suggested practice if the # code adding a preparation block may be reloaded. def to_prepare(identifier = nil, &block) @prepare_dispatch_callbacks ||= ActiveSupport::Callbacks::CallbackChain.new callback = ActiveSupport::Callbacks::Callback.new(:prepare_dispatch, block, :identifier => identifier) @prepare_dispatch_callbacks.replace_or_append!(callback) end def run_prepare_callbacks new.send :run_callbacks, :prepare_dispatch end def reload_application # Run prepare callbacks before every request in development mode run_prepare_callbacks Routing::Routes.reload end def cleanup_application # Cleanup the application before processing the current request. ActiveRecord::Base.reset_subclasses if defined?(ActiveRecord) ActiveSupport::Dependencies.clear ActiveRecord::Base.clear_reloadable_connections! if defined?(ActiveRecord) end end cattr_accessor :middleware self.middleware = ActionDispatch::MiddlewareStack.new do |middleware| middlewares = File.join(File.dirname(__FILE__), "middlewares.rb") middleware.instance_eval(File.read(middlewares)) end include ActiveSupport::Callbacks define_callbacks :prepare_dispatch, :before_dispatch, :after_dispatch def initialize @app = @@middleware.build(lambda { |env| self._call(env) }) freeze end def call(env) @app.call(env) end def _call(env) begin run_callbacks :before_dispatch Routing::Routes.call(env) rescue Exception => exception if controller ||= (::ApplicationController rescue Base) controller.call_with_exception(env, exception).to_a else raise exception end ensure run_callbacks :after_dispatch, :enumerator => :reverse_each end end def flush_logger Base.logger.flush end end end