module Rails class Application extend Initializable class << self # Stub out App initialize def initialize! new end def config @config ||= Configuration.new end # TODO: change the plugin loader to use config alias configuration config def config=(config) @config = config end def plugin_loader @plugin_loader ||= config.plugin_loader.new(self) end def root config.root end def routes ActionController::Routing::Routes end def middleware config.middleware end def call(env) @app ||= middleware.build(routes) @app.call(env) end def new run_initializers self end end initializer :initialize_rails do Rails.run_initializers end # Set the $LOAD_PATH based on the value of # Configuration#load_paths. Duplicates are removed. initializer :set_load_path do config.paths.add_to_load_path $LOAD_PATH.uniq! end # Requires all frameworks specified by the Configuration#frameworks # list. By default, all frameworks (Active Record, Active Support, # Action Pack, Action Mailer, and Active Resource) are loaded. initializer :require_frameworks do begin require 'active_support' require 'active_support/core_ext/kernel/reporting' require 'active_support/core_ext/logger' # TODO: This is here to make Sam Ruby's tests pass. Needs discussion. require 'active_support/core_ext/numeric/bytes' config.frameworks.each { |framework| require(framework.to_s) } rescue LoadError => e # Re-raise as RuntimeError because Mongrel would swallow LoadError. raise e.to_s end end # Set the paths from which Rails will automatically load source files, and # the load_once paths. initializer :set_autoload_paths do require 'active_support/dependencies' ActiveSupport::Dependencies.load_paths = config.load_paths.uniq ActiveSupport::Dependencies.load_once_paths = config.load_once_paths.uniq extra = ActiveSupport::Dependencies.load_once_paths - ActiveSupport::Dependencies.load_paths unless extra.empty? abort <<-end_error load_once_paths must be a subset of the load_paths. Extra items in load_once_paths: #{extra * ','} end_error end # Freeze the arrays so future modifications will fail rather than do nothing mysteriously config.load_once_paths.freeze end # Adds all load paths from plugins to the global set of load paths, so that # code from plugins can be required (explicitly or automatically via ActiveSupport::Dependencies). initializer :add_plugin_load_paths do require 'active_support/dependencies' plugin_loader.add_plugin_load_paths end # Create tmp directories initializer :ensure_tmp_directories_exist do %w(cache pids sessions sockets).each do |dir_to_make| FileUtils.mkdir_p(File.join(config.root, 'tmp', dir_to_make)) end end # Loads the environment specified by Configuration#environment_path, which # is typically one of development, test, or production. initializer :load_environment do silence_warnings do next if @environment_loaded next unless File.file?(config.environment_path) @environment_loaded = true constants = self.class.constants eval(IO.read(config.environment_path), binding, config.environment_path) (self.class.constants - constants).each do |const| Object.const_set(const, self.class.const_get(const)) end end end # Preload all frameworks specified by the Configuration#frameworks. # Used by Passenger to ensure everything's loaded before forking and # to avoid autoload race conditions in JRuby. initializer :preload_frameworks do if config.preload_frameworks config.frameworks.each do |framework| # String#classify and #constantize aren't available yet. toplevel = Object.const_get(framework.to_s.gsub(/(?:^|_)(.)/) { $1.upcase }) toplevel.load_all! if toplevel.respond_to?(:load_all!) end end end # This initialization routine does nothing unless :active_record # is one of the frameworks to load (Configuration#frameworks). If it is, # this sets the database configuration from Configuration#database_configuration # and then establishes the connection. initializer :initialize_database do if config.frameworks.include?(:active_record) ActiveRecord::Base.configurations = config.database_configuration ActiveRecord::Base.establish_connection end end # Include middleware to serve up static assets initializer :initialize_static_server do if config.frameworks.include?(:action_controller) && config.serve_static_assets config.middleware.use(ActionDispatch::Static, Rails.public_path) end end initializer :initialize_middleware_stack do if config.frameworks.include?(:action_controller) config.middleware.use(::Rack::Lock) unless ActionController::Base.allow_concurrency config.middleware.use(ActionDispatch::ShowExceptions, ActionController::Base.consider_all_requests_local) config.middleware.use(ActionDispatch::Callbacks, ActionController::Dispatcher.prepare_each_request) config.middleware.use(lambda { ActionController::Base.session_store }, lambda { ActionController::Base.session_options }) config.middleware.use(ActionDispatch::ParamsParser) config.middleware.use(::Rack::MethodOverride) config.middleware.use(::Rack::Head) config.middleware.use(ActionDispatch::StringCoercion) end end initializer :initialize_cache do unless defined?(RAILS_CACHE) silence_warnings { Object.const_set "RAILS_CACHE", ActiveSupport::Cache.lookup_store(config.cache_store) } if RAILS_CACHE.respond_to?(:middleware) # Insert middleware to setup and teardown local cache for each request config.middleware.insert_after(:"Rack::Lock", RAILS_CACHE.middleware) end end end initializer :initialize_framework_caches do if config.frameworks.include?(:action_controller) ActionController::Base.cache_store ||= RAILS_CACHE end end initializer :initialize_logger do # if the environment has explicitly defined a logger, use it next if Rails.logger unless logger = config.logger begin logger = ActiveSupport::BufferedLogger.new(config.log_path) logger.level = ActiveSupport::BufferedLogger.const_get(config.log_level.to_s.upcase) if RAILS_ENV == "production" logger.auto_flushing = false end rescue StandardError => e logger = ActiveSupport::BufferedLogger.new(STDERR) logger.level = ActiveSupport::BufferedLogger::WARN logger.warn( "Rails Error: Unable to access log file. Please ensure that #{config.log_path} exists and is chmod 0666. " + "The log level has been raised to WARN and the output directed to STDERR until the problem is fixed." ) end end # TODO: Why are we silencing warning here? silence_warnings { Object.const_set "RAILS_DEFAULT_LOGGER", logger } end # Sets the logger for Active Record, Action Controller, and Action Mailer # (but only for those frameworks that are to be loaded). If the framework's # logger is already set, it is not changed, otherwise it is set to use # RAILS_DEFAULT_LOGGER. initializer :initialize_framework_logging do for framework in ([ :active_record, :action_controller, :action_mailer ] & config.frameworks) framework.to_s.camelize.constantize.const_get("Base").logger ||= Rails.logger end ActiveSupport::Dependencies.logger ||= Rails.logger Rails.cache.logger ||= Rails.logger end # Sets the dependency loading mechanism based on the value of # Configuration#cache_classes. initializer :initialize_dependency_mechanism do # TODO: Remove files from the $" and always use require ActiveSupport::Dependencies.mechanism = config.cache_classes ? :require : :load end # Loads support for "whiny nil" (noisy warnings when methods are invoked # on +nil+ values) if Configuration#whiny_nils is true. initializer :initialize_whiny_nils do require('active_support/whiny_nil') if config.whiny_nils end # Sets the default value for Time.zone, and turns on ActiveRecord::Base#time_zone_aware_attributes. # If assigned value cannot be matched to a TimeZone, an exception will be raised. initializer :initialize_time_zone do if config.time_zone zone_default = Time.__send__(:get_zone, config.time_zone) unless zone_default raise \ 'Value assigned to config.time_zone not recognized.' + 'Run "rake -D time" for a list of tasks for finding appropriate time zone names.' end Time.zone_default = zone_default if config.frameworks.include?(:active_record) ActiveRecord::Base.time_zone_aware_attributes = true ActiveRecord::Base.default_timezone = :utc end end end # Set the i18n configuration from config.i18n but special-case for the load_path which should be # appended to what's already set instead of overwritten. initializer :initialize_i18n do config.i18n.each do |setting, value| if setting == :load_path I18n.load_path += value else I18n.send("#{setting}=", value) end end end # Initializes framework-specific settings for each of the loaded frameworks # (Configuration#frameworks). The available settings map to the accessors # on each of the corresponding Base classes. initializer :initialize_framework_settings do config.frameworks.each do |framework| base_class = framework.to_s.camelize.constantize.const_get("Base") config.send(framework).each do |setting, value| base_class.send("#{setting}=", value) end end config.active_support.each do |setting, value| ActiveSupport.send("#{setting}=", value) end end # Sets +ActionController::Base#view_paths+ and +ActionMailer::Base#template_root+ # (but only for those frameworks that are to be loaded). If the framework's # paths have already been set, it is not changed, otherwise it is # set to use Configuration#view_path. initializer :initialize_framework_views do if config.frameworks.include?(:action_view) view_path = ActionView::PathSet.type_cast(config.view_path, config.cache_classes) ActionMailer::Base.template_root = view_path if config.frameworks.include?(:action_mailer) && ActionMailer::Base.view_paths.blank? ActionController::Base.view_paths = view_path if config.frameworks.include?(:action_controller) && ActionController::Base.view_paths.blank? end end initializer :initialize_metal do # TODO: Make Rails and metal work without ActionController if config.frameworks.include?(:action_controller) Rails::Rack::Metal.requested_metals = config.metals Rails::Rack::Metal.metal_paths += plugin_loader.engine_metal_paths config.middleware.insert_before( :"ActionDispatch::ParamsParser", Rails::Rack::Metal, :if => Rails::Rack::Metal.metals.any?) end end # Loads all plugins in config.plugin_paths. plugin_paths # defaults to vendor/plugins but may also be set to a list of # paths, such as # config.plugin_paths = ["#{config.root}/lib/plugins", "#{config.root}/vendor/plugins"] # # In the default implementation, as each plugin discovered in plugin_paths is initialized: # * its +lib+ directory, if present, is added to the load path (immediately after the applications lib directory) # * init.rb is evaluated, if present # # After all plugins are loaded, duplicates are removed from the load path. # If an array of plugin names is specified in config.plugins, only those plugins will be loaded # and they plugins will be loaded in that order. Otherwise, plugins are loaded in alphabetical # order. # # if config.plugins ends contains :all then the named plugins will be loaded in the given order and all other # plugins will be loaded in alphabetical order initializer :load_plugins do plugin_loader.load_plugins end # # bail out if gems are missing - note that check_gem_dependencies will have # # already called abort() unless $gems_rake_task is set # return unless gems_dependencies_loaded initializer :load_application_initializers do Dir["#{configuration.root}/config/initializers/**/*.rb"].sort.each do |initializer| load(initializer) end end # Fires the user-supplied after_initialize block (Configuration#after_initialize) initializer :after_initialize do configuration.after_initialize_blocks.each do |block| block.call end end # # Setup database middleware after initializers have run initializer :initialize_database_middleware do if configuration.frameworks.include?(:active_record) if configuration.frameworks.include?(:action_controller) && ActionController::Base.session_store && ActionController::Base.session_store.name == 'ActiveRecord::SessionStore' configuration.middleware.insert_before :"ActiveRecord::SessionStore", ActiveRecord::ConnectionAdapters::ConnectionManagement configuration.middleware.insert_before :"ActiveRecord::SessionStore", ActiveRecord::QueryCache else configuration.middleware.use ActiveRecord::ConnectionAdapters::ConnectionManagement configuration.middleware.use ActiveRecord::QueryCache end end end # TODO: Make a DSL way to limit an initializer to a particular framework # # Prepare dispatcher callbacks and run 'prepare' callbacks initializer :prepare_dispatcher do next unless configuration.frameworks.include?(:action_controller) require 'rails/dispatcher' unless defined?(::Dispatcher) Dispatcher.define_dispatcher_callbacks(configuration.cache_classes) end # Routing must be initialized after plugins to allow the former to extend the routes # --- # If Action Controller is not one of the loaded frameworks (Configuration#frameworks) # this does nothing. Otherwise, it loads the routing definitions and sets up # loading module used to lazily load controllers (Configuration#controller_paths). initializer :initialize_routing do next unless configuration.frameworks.include?(:action_controller) ActionController::Routing.controller_paths += configuration.controller_paths ActionController::Routing::Routes.add_configuration_file(configuration.routes_configuration_file) ActionController::Routing::Routes.reload! end # # # Observers are loaded after plugins in case Observers or observed models are modified by plugins. initializer :load_observers do if configuration.frameworks.include?(:active_record) ActiveRecord::Base.instantiate_observers end end # Eager load application classes initializer :load_application_classes do next if $rails_rake_task if configuration.cache_classes configuration.eager_load_paths.each do |load_path| matcher = /\A#{Regexp.escape(load_path)}(.*)\.rb\Z/ Dir.glob("#{load_path}/**/*.rb").sort.each do |file| require_dependency file.sub(matcher, '\1') end end end end # Disable dependency loading during request cycle initializer :disable_dependency_loading do if configuration.cache_classes && !configuration.dependency_loading ActiveSupport::Dependencies.unhook! end end # Configure generators if they were already loaded # === # TODO: Does this need to be an initializer here? initializer :initialize_generators do if defined?(Rails::Generators) Rails::Generators.no_color! unless config.generators.colorize_logging Rails::Generators.aliases.deep_merge! config.generators.aliases Rails::Generators.options.deep_merge! config.generators.options end end # For each framework, search for instrument file with Notifications hooks. # initializer :load_notifications_hooks do config.frameworks.each do |framework| begin require "#{framework}/notifications" rescue LoadError => e end end end end end