Add notifications to default middleware stack and update subscriber tests.

railties/lib/rails/configuration.rb

@@ -14,6 +14,7 @@ module Rails
         middleware.use('::Rack::Lock', :if => lambda { !ActionController::Base.allow_concurrency })
         middleware.use('::Rack::Runtime')
         middleware.use('ActionDispatch::ShowExceptions', lambda { ActionController::Base.consider_all_requests_local })
+        middleware.use('ActionDispatch::Notifications')
         middleware.use('ActionDispatch::Callbacks', lambda { ActionController::Dispatcher.prepare_each_request })
         middleware.use('ActionDispatch::Cookies')
         middleware.use(lambda { ActionController::Base.session_store }, lambda { ActionController::Base.session_options })

railties/lib/rails/subscriber.rb

@@ -66,7 +66,7 @@ module Rails
         subscriber.send(name, ActiveSupport::Notifications::Event.new(*args))
       end
 
-      if args[0] == "action_dispatch.callback" && !subscribers.empty?
+      if args[0] == "action_dispatch.after_dispatch" && !subscribers.empty?
         flush_all!
         log_tailer.tail! if log_tailer
       end

railties/test/application/middleware_test.rb

@@ -18,6 +18,7 @@ module ApplicationTests
         "Rack::Lock",
         "Rack::Runtime",
         "ActionDispatch::ShowExceptions",
+        "ActionDispatch::Notifications",
         "ActionDispatch::Callbacks",
         "ActionDispatch::Cookies",
         "ActionDispatch::Session::CookieStore",

railties/test/application/notifications_test.rb

@@ -64,7 +64,7 @@ module ApplicationTests
 
       ActiveRecord::Base.logger = logger = MockLogger.new
 
-      # Mimic an ActiveRecord notifications
+      # Mimic ActiveRecord notifications
       instrument "active_record.sql", :name => "SQL", :sql => "SHOW tables"
       wait
 

railties/test/subscriber_test.rb

@@ -92,7 +92,7 @@ module SubscriberTest
 
   def test_flushes_loggers_when_action_dispatch_callback_is_received
     Rails::Subscriber.add :my_subscriber, @subscriber
-    instrument "action_dispatch.callback"
+    instrument "action_dispatch.after_dispatch"
     wait
     assert_equal 1, @logger.flush_count
   end
@@ -100,7 +100,7 @@ module SubscriberTest
   def test_flushes_the_same_logger_just_once
     Rails::Subscriber.add :my_subscriber, @subscriber
     Rails::Subscriber.add :another, @subscriber
-    instrument "action_dispatch.callback"
+    instrument "action_dispatch.after_dispatch"
     wait
     assert_equal 1, @logger.flush_count
   end
@@ -111,7 +111,7 @@ module SubscriberTest
     Rails::Subscriber.log_tailer = log_tailer
 
     Rails::Subscriber.add :my_subscriber, @subscriber
-    instrument "action_dispatch.callback"
+    instrument "action_dispatch.after_dispatch"
     wait
   ensure
     Rails::Subscriber.log_tailer = nil