--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sat_frontends/bridge/bridge_frontend.py	Mon Apr 02 19:44:50 2018 +0200
@@ -0,0 +1,42 @@
+#!/usr/bin/env python2
+#-*- coding: utf-8 -*-
+
+# SAT communication bridge
+# Copyright (C) 2009-2018 Jérôme Poisson (goffi@goffi.org)
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program 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 Affero General Public License for more details.
+
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+class BridgeException(Exception):
+    """An exception which has been raised from the backend and arrived to the frontend."""
+
+    def __init__(self, name, message='', condition=''):
+        """
+
+        @param name (str): full exception class name (with module)
+        @param message (str): error message
+        @param condition (str) : error condition
+        """
+        Exception.__init__(self)
+        self.fullname = unicode(name)
+        self.message = unicode(message)
+        self.condition = unicode(condition) if condition else ''
+        self.module, dummy, self.classname = unicode(self.fullname).rpartition('.')
+
+    def __str__(self):
+        message = (': %s' % self.message) if self.message else ''
+        return self.classname + message
+
+    def __eq__(self, other):
+        return self.classname == other