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diff --git a/vendor/rails/activesupport/lib/active_support/cache/memory_store.rb b/vendor/rails/activesupport/lib/active_support/cache/memory_store.rb
new file mode 100644
index 0000000..1b30d49
--- /dev/null
+++ b/vendor/rails/activesupport/lib/active_support/cache/memory_store.rb
@@ -0,0 +1,52 @@
+module ActiveSupport
+  module Cache
+    # A cache store implementation which stores everything into memory in the
+    # same process. If you're running multiple Ruby on Rails server processes
+    # (which is the case if you're using mongrel_cluster or Phusion Passenger),
+    # then this means that your Rails server process instances won't be able
+    # to share cache data with each other. If your application never performs
+    # manual cache item expiry (e.g. when you're using generational cache keys),
+    # then using MemoryStore is ok. Otherwise, consider carefully whether you
+    # should be using this cache store.
+    #
+    # MemoryStore is not only able to store strings, but also arbitrary Ruby
+    # objects.
+    #
+    # MemoryStore is not thread-safe. Use SynchronizedMemoryStore instead
+    # if you need thread-safety.
+    class MemoryStore < Store
+      def initialize
+        @data = {}
+      end
+
+      def read(name, options = nil)
+        super
+        @data[name]
+      end
+
+      def write(name, value, options = nil)
+        super
+        @data[name] = value.freeze
+      end
+
+      def delete(name, options = nil)
+        super
+        @data.delete(name)
+      end
+
+      def delete_matched(matcher, options = nil)
+        super
+        @data.delete_if { |k,v| k =~ matcher }
+      end
+
+      def exist?(name,options = nil)
+        super
+        @data.has_key?(name)
+      end
+
+      def clear
+        @data.clear
+      end
+    end
+  end
+end