etisserant@203: #!/usr/bin/env python
etisserant@203: # -*- coding: utf-8 -*-
andrej@1571: 
andrej@1571: # This file is part of Beremiz, a Integrated Development Environment for
andrej@1571: # programming IEC 61131-3 automates supporting plcopen standard and CanFestival.
etisserant@203: #
r@1455: # Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD
etisserant@203: #
r@1455: # See COPYING file for copyrights details.
etisserant@203: #
andrej@1571: # This program is free software; you can redistribute it and/or
andrej@1571: # modify it under the terms of the GNU General Public License
andrej@1571: # as published by the Free Software Foundation; either version 2
andrej@1571: # of the License, or (at your option) any later version.
etisserant@203: #
andrej@1571: # This program is distributed in the hope that it will be useful,
r@1455: # but WITHOUT ANY WARRANTY; without even the implied warranty of
andrej@1571: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
andrej@1571: # GNU General Public License for more details.
etisserant@203: #
andrej@1571: # You should have received a copy of the GNU General Public License
andrej@1571: # along with this program; if not, write to the Free Software
andrej@1571: # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
etisserant@203: 
etisserant@203: # Package initialisation
etisserant@203: 
etisserant@203: from os import listdir, path
etisserant@203: 
laurent@399: 
etisserant@203: _base_path = path.split(__file__)[0]
etisserant@203: 
laurent@399: 
Edouard@733: def _GetLocalConnectorClassFactory(name):
r@1455:     return lambda: getattr(__import__(name, globals(), locals()), name + "_connector_factory")
Edouard@733: 
Edouard@1440: connectors = {name:_GetLocalConnectorClassFactory(name)
Edouard@1440:                   for name in listdir(_base_path)
Edouard@1440:                       if path.isdir(path.join(_base_path, name))
Edouard@733:                           and not name.startswith("__")}
etisserant@203: 
r@1455: 
Edouard@717: def ConnectorFactory(uri, confnodesroot):
etisserant@203:     """
etisserant@203:     Return a connector corresponding to the URI
etisserant@203:     or None if cannot connect to URI
etisserant@203:     """
Edouard@1440:     servicetype = uri.split("://")[0].upper()
Edouard@1440:     if servicetype == "LOCAL":
Edouard@1440:         # Local is special case
Edouard@1440:         # pyro connection to local runtime
Edouard@1440:         # started on demand, listening on random port
Edouard@1440:         servicetype = "PYRO"
Edouard@1440:         runtime_port = confnodesroot.AppFrame.StartLocalRuntime(
Edouard@1440:             taskbaricon=True)
r@1455:         uri = "PYROLOC://127.0.0.1:" + str(runtime_port)
Edouard@1440:     elif servicetype in connectors:
Edouard@1440:         pass
r@1455:     elif servicetype[-1] == 'S' and servicetype[:-1] in connectors:
Edouard@1440:         servicetype = servicetype[:-1]
r@1455:     else:
Edouard@1440:         return None
Edouard@1440: 
Edouard@1440:     # import module according to uri type
Edouard@1440:     connectorclass = connectors[servicetype]()
Edouard@733:     return connectorclass(uri, confnodesroot)