Reorganize autoloads:

  * A new module (ActiveSupport::Autoload) is provide that extends
    autoloading with new behavior.
  * All autoloads in modules that have extended ActiveSupport::Autoload
    will be eagerly required in threadsafe environments
  * Autoloads can optionally leave off the path if the path is the same
    as full_constant_name.underscore
  * It is possible to specify that a group of autoloads live under an
    additional path. For instance, all of ActionDispatch's middlewares
    are ActionDispatch::MiddlewareName, but they live under 
    "action_dispatch/middlewares/middleware_name"
  * It is possible to specify that a group of autoloads are all found
    at the same path. For instance, a number of exceptions might all
    be declared there.
  * One consequence of this is that testing-related constants are not
    autoloaded. To get the testing helpers for a given component,
    require "component_name/test_case". For instance, "action_controller/test_case".
  * test_help.rb, which is automatically required by a Rails application's
    test helper, requires the test_case.rb for all active components, so
    this change will not be disruptive in existing or new applications.

1 files changed, 13 insertions, 0 deletions

diff --git a/actionpack/lib/action_controller/metal/rescue.rb b/actionpack/lib/action_controller/metal/rescue.rb
new file mode 100644
index 0000000000..bbca1b2179
--- /dev/null
+++ b/actionpack/lib/action_controller/metal/rescue.rb
@@ -0,0 +1,13 @@
+module ActionController #:nodoc:
+  module Rescue
+    extend ActiveSupport::Concern
+    include ActiveSupport::Rescuable
+
+    private
+      def process_action(*args)
+        super
+      rescue Exception => exception
+        rescue_with_handler(exception) || raise(exception)
+      end
+  end
+end