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@@ -1 +1,32 @@
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+require 'rack/adapter/rails'
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+
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+# Monkey patch Thin Rails adapter to add a mutex
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+module Rack
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+  module Adapter
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+    class Rails
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+      def initialize_with_mutex(*args)
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+        @mutex = Mutex.new
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+        initialize_without_mutex(*args)
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+        
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+        puts "using threaded rails"
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+      end
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+      alias_method :initialize_without_mutex, :initialize
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+      alias_method :initialize, :initialize_with_mutex
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+      
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+      def serve_rails(env)
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+        request         = Request.new(env)
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+        response        = Response.new
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+        
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+        session_options = ActionController::CgiRequest::DEFAULT_SESSION_OPTIONS
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+        cgi             = CGIWrapper.new(request, response)
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+    
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+        @mutex.synchronize do
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+          Dispatcher.dispatch(cgi, session_options, response)
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+        end
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+
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+        response.finish
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+      end
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+    end
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+  end
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+end

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@@ -4,4 +4,5 @@
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 require File.dirname(__FILE__) + "/../ext/thin_backend/thin_backend"
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 require File.dirname(__FILE__) + "/thin/backends/turbo"
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+require File.dirname(__FILE__) + "/rack/adapter/threaded_rails"