andrej@1731: #!/usr/bin/env python
andrej@1731: # -*- coding: utf-8 -*-
andrej@1731: 
andrej@1731: # This file is part of Beremiz, a Integrated Development Environment for
andrej@1731: # programming IEC 61131-3 automates supporting plcopen standard and CanFestival.
andrej@1731: #
andrej@1731: # Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD
andrej@1731: # Copyright (C) 2017: Andrey Skvortsov
andrej@1731: #
andrej@1731: # See COPYING file for copyrights details.
andrej@1731: #
andrej@1731: # This program is free software; you can redistribute it and/or
andrej@1731: # modify it under the terms of the GNU General Public License
andrej@1731: # as published by the Free Software Foundation; either version 2
andrej@1731: # of the License, or (at your option) any later version.
andrej@1731: #
andrej@1731: # This program is distributed in the hope that it will be useful,
andrej@1731: # but WITHOUT ANY WARRANTY; without even the implied warranty of
andrej@1731: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
andrej@1731: # GNU General Public License for more details.
andrej@1731: #
andrej@1731: # You should have received a copy of the GNU General Public License
andrej@1731: # along with this program; if not, write to the Free Software
andrej@1731: # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
andrej@1731: 
andrej@1731: # Package initialisation
andrej@1731: 
andrej@1731: from os import listdir, path
andrej@1731: import util.paths as paths
andrej@1731: 
andrej@1731: _base_path = paths.AbsDir(__file__)
andrej@1731: 
andrej@1731: 
andrej@1731: def _GetLocalConnectorClassFactory(name):
andrej@1731:     return lambda: getattr(__import__(name, globals(), locals()), name + "_connector_factory")
andrej@1731: 
andrej@1749: 
andrej@1767: connectors = {name:
andrej@1767:               _GetLocalConnectorClassFactory(name)
andrej@1767:               for name in listdir(_base_path)
andrej@1785:               if (path.isdir(path.join(_base_path, name)) and
andrej@1785:                   not name.startswith("__"))}
andrej@1731: 
andrej@1731: 
andrej@1731: def ConnectorFactory(uri, confnodesroot):
andrej@1731:     """
andrej@1731:     Return a connector corresponding to the URI
andrej@1731:     or None if cannot connect to URI
andrej@1731:     """
andrej@1731:     servicetype = uri.split("://")[0].upper()
andrej@1731:     if servicetype == "LOCAL":
andrej@1731:         # Local is special case
andrej@1731:         # pyro connection to local runtime
andrej@1731:         # started on demand, listening on random port
andrej@1731:         servicetype = "PYRO"
andrej@1731:         runtime_port = confnodesroot.AppFrame.StartLocalRuntime(
andrej@1731:             taskbaricon=True)
andrej@1731:         uri = "PYROLOC://127.0.0.1:" + str(runtime_port)
andrej@1731:     elif servicetype in connectors:
andrej@1731:         pass
andrej@1731:     elif servicetype[-1] == 'S' and servicetype[:-1] in connectors:
andrej@1731:         servicetype = servicetype[:-1]
andrej@1731:     else:
andrej@1731:         return None
andrej@1731: 
andrej@1731:     # import module according to uri type
andrej@1731:     connectorclass = connectors[servicetype]()
andrej@1731:     return connectorclass(uri, confnodesroot)