--- a/src/pyams_utils/property.py	Sun Feb 22 14:52:03 2015 +0100
+++ b/src/pyams_utils/property.py	Sat Feb 28 16:18:26 2015 +0100
@@ -64,42 +64,53 @@
 
 _marker = object()
 
-class request_property(object):
-    """Define a property stored in request annotations"""
 
-    def __init__(self, fget, key=None):
-        self.fget = fget
-        if key is None:
-            key = "%s.%s" % (fget.__module__, fget.__name__)
-        self.key = key
+def request_property(key):
+    """Define a method decorator used to store result into request's annotations
+
+    `key` is a required argument; if None, the key will be the method's object
+    """
 
-    def __get__(self, obj, cls):
-        if obj is None:
-            return self
-        request = check_request()
-        data = get_request_data(request, self.key, _marker)
-        if data is _marker:
-            data = self.fget(obj)
-            set_request_data(request, self.key, data)
-        return data
+    def request_decorator(func):
+        def wrapper(obj, key, *args, **kwargs):
+            request = check_request()
+            if callable(key):
+                key = key(obj)
+            if not key:
+                key = '%r' % obj
+            data = get_request_data(request, key, _marker)
+            if data is _marker:
+                data = func
+                if callable(data):
+                    data = data(obj, *args, **kwargs)
+                set_request_data(request, key, data)
+            return data
+        return lambda x: wrapper(x, key=key)
+
+    return request_decorator
 
 
-class session_property(object):
-    """Define a property stored into session"""
+def session_property(app, key=None):
+    """Define a method decorator used to store result into request's session
 
-    def __init__(self, fget, app, key=None):
-        self.fget = fget
-        self.app = app
-        if key is None:
-            key = "%s.%s" % (fget.__module__, fget.__name__)
-        self.key = key
+    `app` is an application identifier used to prefix session keys
+    `key` is session's value key; if None, the key will be the method's object
+    """
 
-    def __get__(self, obj, cls):
-        if obj is None:
-            return self
-        request = check_request()
-        data = get_session_data(request, self.app, self.key, _marker)
-        if data is _marker:
-            data = self.fget(obj)
-            set_session_data(request, self.app, self.key, data)
-        return data
+    def session_decorator(func):
+        def wrapper(obj, app, key, *args, **kwargs):
+            request = check_request()
+            if callable(key):
+                key = key(obj)
+            if not key:
+                key = '%r' % obj
+            data = get_session_data(request, app, key, _marker)
+            if data is _marker:
+                data = func
+                if callable(data):
+                    data = data(obj, *args, **kwargs)
+                set_session_data(request, app, key, data)
+            return data
+        return lambda x: wrapper(x, app=app, key=key)
+
+    return session_decorator