--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sat/bridge/bridge_constructor/constructors/pb/pb_frontend_template.py	Mon Apr 02 19:44:50 2018 +0200
@@ -0,0 +1,127 @@
+#!/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/>.
+
+from sat.core.log import getLogger
+log = getLogger(__name__)
+from sat.core import exceptions
+from twisted.spread import pb
+from twisted.internet import reactor
+
+
+class SignalsHandler(pb.Referenceable):
+
+    def __getattr__(self, name):
+        if name.startswith("remote_"):
+            log.debug(u"calling an unregistered signal: {name}".format(
+                name = name[7:]))
+            return lambda *args, **kwargs: None
+
+        else:
+            raise AttributeError(name)
+
+    def register_signal(self, name, handler, iface="core"):
+        log.debug("registering signal {name}".format(name=name))
+        method_name = "remote_" + name
+        try:
+            self.__getattribute__(self, method_name)
+        except AttributeError:
+            pass
+        else:
+            raise exceptions.InternalError(u"{name} signal handler has been registered twice".format(
+                name = method_name))
+        setattr(self, method_name, handler)
+
+
+class Bridge(object):
+
+    def __init__(self):
+        self.signals_handler = SignalsHandler()
+
+    def __getattr__(self, name):
+        return lambda *args, **kwargs: self.call(name, args, kwargs)
+
+    def remoteCallback(self, result, callback):
+        """call callback with argument or None
+
+        if result is not None not argument is used,
+        else result is used as argument
+        @param result: remote call result
+        @param callback(callable): method to call on result
+        """
+        if result is None:
+            callback()
+        else:
+            callback(result)
+
+    def call(self, name, args, kwargs):
+        """call a remote method
+
+        @param name(str): name of the bridge method
+        @param args(list): arguments
+            may contain callback and errback as last 2 items
+        @param kwargs(dict): keyword arguments
+            may contain callback and errback
+        """
+        callback = errback = None
+        if kwargs:
+            try:
+                callback = kwargs.pop('callback')
+            except KeyError:
+                pass
+            try:
+                errback = kwargs.pop('errback')
+            except KeyError:
+                pass
+        elif len(args) >= 2 and callable(args[-1]) and callable(args[-2]):
+            errback = args.pop()
+            callback = args.pop()
+        d = self.root.callRemote(name, *args, **kwargs)
+        if callback is not None:
+            d.addCallback(self.remoteCallback, callback)
+        if errback is not None:
+            d.addErrback(errback)
+
+    def _initBridgeEb(self, failure):
+        log.error(u"Can't init bridge: {msg}".format(msg=failure))
+
+    def _set_root(self, root):
+        """set remote root object
+
+        bridge will then be initialised
+        """
+        self.root = root
+        d = root.callRemote("initBridge", self.signals_handler)
+        d.addErrback(self._initBridgeEb)
+        return d
+
+    def _generic_errback(self, failure):
+        log.error(u"bridge failure: {}".format(failure))
+
+    def bridgeConnect(self, callback, errback):
+        factory = pb.PBClientFactory()
+        reactor.connectTCP("localhost", 8789, factory)
+        d = factory.getRootObject()
+        d.addCallback(self._set_root)
+        d.addCallback(lambda dummy: callback())
+        d.addErrback(errback)
+
+    def register_signal(self, functionName, handler, iface="core"):
+        self.signals_handler.register_signal(functionName, handler, iface)
+
+##METHODS_PART##