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diff --git a/sca-cpp/branches/lightweight-sca/samples/store-cluster/domains/joe/shopping-cart.py b/sca-cpp/branches/lightweight-sca/samples/store-cluster/domains/joe/shopping-cart.py
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+++ b/sca-cpp/branches/lightweight-sca/samples/store-cluster/domains/joe/shopping-cart.py
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+#  Licensed to the Apache Software Foundation (ASF) under one
+#  or more contributor license agreements.  See the NOTICE file
+#  distributed with this work for additional information
+#  regarding copyright ownership.  The ASF licenses this file
+#  to you under the Apache License, Version 2.0 (the
+#  "License"); you may not use this file except in compliance
+#  with the License.  You may obtain a copy of the License at
+#  
+#    http://www.apache.org/licenses/LICENSE-2.0
+#    
+#  Unless required by applicable law or agreed to in writing,
+#  software distributed under the License is distributed on an
+#  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+#  KIND, either express or implied.  See the License for the
+#  specific language governing permissions and limitations
+#  under the License.
+
+# Shopping cart implementation
+import uuid
+import sys
+
+# Convert a particular host and user email to a cart id
+def cartid(host, email):
+    return ("cart", host.eval(), email.eval())
+
+# Get the shopping cart from the cache
+# Return an empty cart if not found
+def getcart(id, cache):
+    cart = cache.get(id)
+    if cart is None:
+        return ()
+    return cart
+
+# Post a new item to the cart, create a new cart if necessary
+def post(collection, item, cache, host, email):
+    id = str(uuid.uuid1())
+    cart = (("'entry", item[0][1], ("'id", id), item[0][3]),) + getcart(cartid(host, email), cache)
+    cache.put(cartid(host, email), cart)
+    return (id,)
+
+
+# Find an item in the cart
+def find(id, cart):
+    if cart == ():
+        return (("'entry", ("'title", "Item"), ("'id", 0)),)
+    elif id == cart[0][2][1]:
+        return (cart[0],)
+    else:
+        return find(id, cart[1:])
+
+# Get items from the cart
+def get(id, cache, host, email):
+    if id == ():
+        return ((("'feed", ("'title", "Your Cart"), ("'id", email.eval())) + getcart(cartid(host,email), cache)),)
+    return find(id[0], getcart(cartid(host, email), cache))
+
+# Delete items from the  cart
+def delete(id, cache, host, email):
+    if id == ():
+        return cache.delete(cartid(host, email))
+    return True
+
+# Return the price of an item
+def price(item):
+    return float(filter(lambda x: x[0] == "'price", item[3][1][1:])[0][1])
+
+# Sum the prices of a list of items
+def sum(items):
+    if items == ():
+        return 0
+    return price(items[0]) + sum(items[1:])
+
+# Return the total price of the items in the cart
+def total(cache, host, email):
+    return sum(getcart(cartid(host, email), cache))
+