Merge commit 'mainstream/master'

Conflicts:
	actionpack/lib/action_controller/base.rb
	railties/guides/source/caching_with_rails.textile

1 files changed, 40 insertions, 0 deletions

diff --git a/actionpack/lib/action_controller/abstract/callbacks.rb b/actionpack/lib/action_controller/abstract/callbacks.rb
new file mode 100644
index 0000000000..c8b509081c
--- /dev/null
+++ b/actionpack/lib/action_controller/abstract/callbacks.rb
@@ -0,0 +1,40 @@
+module AbstractController
+  module Callbacks
+    setup do
+      include ActiveSupport::NewCallbacks
+      define_callbacks :process_action      
+    end
+    
+    def process_action
+      _run_process_action_callbacks(action_name) do
+        super
+      end
+    end
+    
+    module ClassMethods
+      def _normalize_callback_options(options)
+        if only = options[:only]
+          only = Array(only).map {|o| "action_name == :#{o}"}.join(" || ")
+          options[:per_key] = {:if => only}
+        end
+        if except = options[:except]
+          except = Array(except).map {|e| "action_name == :#{e}"}.join(" || ")          
+          options[:per_key] = {:unless => except}
+        end
+      end
+      
+      [:before, :after, :around].each do |filter|
+        class_eval <<-RUBY_EVAL, __FILE__, __LINE__ + 1
+          def #{filter}_filter(*names, &blk)
+            options = names.last.is_a?(Hash) ? names.pop : {}
+            _normalize_callback_options(options)
+            names.push(blk) if block_given?
+            names.each do |name|
+              process_action_callback(:#{filter}, name, options)
+            end
+          end
+        RUBY_EVAL
+      end
+    end
+  end
+end
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