Minor changes to memoize

Modifying memoize to accept user defined ttl from config and
changing the way unique id is calculated.

Change-Id: Icda4e105bb9ead8edeaef089b677a83d1fa6f9d4

syntribos/config.py

@@ -239,7 +239,9 @@ def list_user_opts():
         cfg.StrOpt("serialize_format", default="json",
                    help="Type of request body"),
         cfg.StrOpt("deserialize_format", default="json",
-                   help="Type of response body")
+                   help="Type of response body"),
+        cfg.IntOpt("token_ttl", default=1800,
+                   help="Time to live for token in seconds")
 
     ]
 

syntribos/utils/memoize.py

@@ -12,9 +12,12 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 from functools import wraps
-from hashlib import md5
 from time import time
 
+from oslo_config import cfg
+
+CONF = cfg.CONF
+
 
 def memoize(func):
     """Caches the result of a function call
@@ -25,8 +28,8 @@ def memoize(func):
 
     @wraps(func)
     def decorate(*args, **kwargs):
-        ttl = time() + 1800
-        func_id = md5(str(func.__name__) + str(args) + str(kwargs)).digest()
+        ttl = time() + CONF.user.token_ttl
+        func_id = args, frozenset(kwargs.items())
         if memoized_calls.get(func_id):
             time_left = memoized_calls[func_id]["ttl"] - time()
             if time_left > 0: