diff -r 058bb3dc685f -r 0b59724cb3f2 cubicweb/sobjects/__init__.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cubicweb/sobjects/__init__.py	Sat Jan 16 13:48:51 2016 +0100
@@ -0,0 +1,30 @@
+# copyright 2003-2012 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
+#
+# This file is part of CubicWeb.
+#
+# CubicWeb is free software: you can redistribute it and/or modify it under the
+# terms of the GNU Lesser General Public License as published by the Free
+# Software Foundation, either version 2.1 of the License, or (at your option)
+# any later version.
+#
+# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Lesser General Public License along
+# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
+"""server side objects"""
+
+import os.path as osp
+
+def registration_callback(vreg):
+    vreg.register_all(globals().values(), __name__)
+    global URL_MAPPING
+    URL_MAPPING = {}
+    if vreg.config.apphome:
+        url_mapping_file = osp.join(vreg.config.apphome, 'urlmapping.py')
+        if osp.exists(url_mapping_file):
+            URL_MAPPING = eval(open(url_mapping_file).read())
+            vreg.info('using url mapping %s from %s', URL_MAPPING, url_mapping_file)