From ad6be0876271f86e76c89645a0106b85c9d77ad7 Mon Sep 17 00:00:00 2001
From: Piotr Sarnacki <drogus@gmail.com>
Date: Tue, 22 Jun 2010 23:51:28 +0200
Subject: Made Engine valid rack app with its own middleware stack

---
 railties/lib/rails/engine.rb | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'railties/lib/rails/engine.rb')

diff --git a/railties/lib/rails/engine.rb b/railties/lib/rails/engine.rb
index 555bc9dbc8..f8a33ffe24 100644
--- a/railties/lib/rails/engine.rb
+++ b/railties/lib/rails/engine.rb
@@ -140,6 +140,19 @@ module Rails
       end
     end
 
+    def app
+      raise "You can't use Engine as rack application without providing valid rack endpoint" unless endpoint
+      @app ||= config.middleware.build(endpoint)
+    end
+
+    def endpoint
+      self.class.endpoint
+    end
+
+    def call(env)
+      app.call(env)
+    end
+
     # Add configured load paths to ruby load paths and remove duplicates.
     initializer :set_load_path, :before => :bootstrap_hook do
       _all_load_paths.reverse_each do |path|
-- 
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