1 files changed, 10 insertions, 6 deletions
diff --git a/railties/lib/rails/configuration.rb b/railties/lib/rails/configuration.rb
index bcd98c67f8..a1e901f04f 100644
--- a/railties/lib/rails/configuration.rb
+++ b/railties/lib/rails/configuration.rb
@@ -50,6 +50,10 @@ module Rails
         super || name.to_s =~ config_key_regexp
       end
 
+      def metal_loader
+        @metal_loader ||= Rails::Application::MetalLoader.new
+      end
+
     private
 
       def method_missing(name, *args, &blk)
@@ -75,17 +79,17 @@ module Rails
       def default_middleware
         require 'action_dispatch'
         ActionDispatch::MiddlewareStack.new.tap do |middleware|
-          middleware.use('::ActionDispatch::Static', lambda { Rails.public_path }, :if => lambda { Rails.application.config.serve_static_assets })
-          middleware.use('::Rack::Lock', :if => lambda { !Rails.application.config.allow_concurrency })
+          middleware.use('::ActionDispatch::Static', lambda { Rails.public_path }, :if => lambda { serve_static_assets })
+          middleware.use('::Rack::Lock', :if => lambda { !allow_concurrency })
           middleware.use('::Rack::Runtime')
           middleware.use('::Rails::Rack::Logger')
-          middleware.use('::ActionDispatch::ShowExceptions', lambda { Rails.application.config.consider_all_requests_local })
-          middleware.use('::Rack::Sendfile', lambda { Rails.application.config.action_dispatch.x_sendfile_header })
-          middleware.use('::ActionDispatch::Callbacks', lambda { !Rails.application.config.cache_classes })
+          middleware.use('::ActionDispatch::ShowExceptions', lambda { consider_all_requests_local })
+          middleware.use('::Rack::Sendfile', lambda { action_dispatch.x_sendfile_header })
+          middleware.use('::ActionDispatch::Callbacks', lambda { !cache_classes })
           middleware.use('::ActionDispatch::Cookies')
           middleware.use(lambda { ActionController::Base.session_store }, lambda { ActionController::Base.session_options })
           middleware.use('::ActionDispatch::Flash', :if => lambda { ActionController::Base.session_store })
-          middleware.use(lambda { Rails.application.metal_loader.build_middleware(Rails.application.config.metals) }, :if => lambda { Rails.application.metal_loader.metals.any? })
+          middleware.use(lambda { metal_loader.build_middleware(metals) }, :if => lambda { metal_loader.metals.any? })
           middleware.use('ActionDispatch::ParamsParser')
           middleware.use('::Rack::MethodOverride')
           middleware.use('::ActionDispatch::Head')