Give hooks the flexibility to choose the type of callback.

railties/lib/rails/application.rb

@@ -115,19 +115,21 @@ def routes_reloader #:nodoc:
     # A plugin may override this if they desire to provide a more
     # exquisite route reloading.
     # :api: plugin
-    def routes_reloader_hook
-      app = self
-      lambda { app.routes_reloader.execute_if_updated }
+    def set_routes_reloader_hook
+      reloader = routes_reloader
+      hook = lambda { reloader.execute_if_updated }
+      hook.call
+      ActionDispatch::Reloader.to_prepare(&hook)
     end
 
-    # An app reloader hook that is used to setup to_cleanup callbacks.
+    # An app dependencies hook that is used to setup to_cleanup callbacks.
     # A plugin may override this if they desire to provide a more exquisite app reloading.
     # :api: plugin
-    def app_reloader_hook
-      lambda {
+    def set_dependencies_hook
+      ActionDispatch::Reloader.to_cleanup do
         ActiveSupport::DescendantsTracker.clear
         ActiveSupport::Dependencies.clear
-      }
+      end
     end
 
     # Initialize the application passing the given group. By default, the

railties/lib/rails/application/finisher.rb

@@ -66,16 +66,14 @@ module Finisher
 
       # Set app reload just after the finisher hook to ensure
       # paths added in the hook are still loaded.
-      initializer :set_clear_dependencies_hook, :group => :all do |app|
-        ActionDispatch::Reloader.to_cleanup(&app.app_reloader_hook)
+      initializer :set_dependencies_hook, :group => :all do |app|
+        app.set_dependencies_hook
       end
 
       # Set app reload just after the finisher hook to ensure
       # routes added in the hook are still loaded.
-      initializer :set_routes_reloader do |app|
-        reloader = app.routes_reloader_hook
-        reloader.call
-        ActionDispatch::Reloader.to_prepare(&reloader)
+      initializer :set_routes_reloader_hook do |app|
+        app.set_routes_reloader_hook
       end
 
       # Disable dependency loading during request cycle