Vendoring Rails 2.3.5

vendor/rails/actionpack/lib/action_controller/reloader.rb

@@ -0,0 +1,54 @@
+require 'thread'
+
+module ActionController
+  class Reloader
+    @@default_lock = Mutex.new
+    cattr_accessor :default_lock
+
+    class BodyWrapper
+      def initialize(body, lock)
+        @body = body
+        @lock = lock
+      end
+
+      def close
+        @body.close if @body.respond_to?(:close)
+      ensure
+        Dispatcher.cleanup_application
+        @lock.unlock
+      end
+
+      def method_missing(*args, &block)
+        @body.send(*args, &block)
+      end
+
+      def respond_to?(symbol, include_private = false)
+        symbol == :close || @body.respond_to?(symbol, include_private)
+      end
+    end
+
+    def self.run(lock = @@default_lock)
+      lock.lock
+      begin
+        Dispatcher.reload_application
+        status, headers, body = yield
+        # We do not want to call 'cleanup_application' in an ensure block
+        # because the returned Rack response body may lazily generate its data. This
+        # is for example the case if one calls
+        #
+        #   render :text => lambda { ... code here which refers to application models ... }
+        #
+        # in an ActionController.
+        #
+        # Instead, we will want to cleanup the application code after the request is
+        # completely finished. So we wrap the body in a BodyWrapper class so that
+        # when the Rack handler calls #close during the end of the request, we get to
+        # run our cleanup code.
+        [status, headers, BodyWrapper.new(body, lock)]
+      rescue Exception
+        lock.unlock
+        raise
+      end
+    end
+  end
+end