1

#!/usr/bin/env python

     2

# -*- coding: utf-8 -*-

     3

     4

# This file is part of Beremiz runtime.

     5

#

     6

# Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD

     7

#

     8

# See COPYING.Runtime file for copyrights details.

     9

#

    10

# This library is free software; you can redistribute it and/or

    11

# modify it under the terms of the GNU Lesser General Public

    12

# License as published by the Free Software Foundation; either

    13

# version 2.1 of the License, or (at your option) any later version.

    14

    15

# This library is distributed in the hope that it will be useful,

    16

# but WITHOUT ANY WARRANTY; without even the implied warranty of

    17

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    18

# Lesser General Public License for more details.

    19

    20

# You should have received a copy of the GNU Lesser General Public

    21

# License along with this library; if not, write to the Free Software

    22

# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

    23

    24

import sys

    25

#from twisted.python import log

    26

from autobahn.twisted import wamp

    27

from autobahn.twisted.websocket import WampWebSocketClientFactory, connectWS

    28

from twisted.internet.defer import inlineCallbacks

    29

from autobahn.wamp import types

    30

from autobahn.wamp.serializer import MsgPackSerializer

    31

from twisted.internet.protocol import ReconnectingClientFactory

    32

import json

    33

    34

_WampSession = None

    35

_PySrv = None

    36

    37

ExposedCalls = ["StartPLC",

    38

                "StopPLC",

    39

                "ForceReload",

    40

                "GetPLCstatus",

    41

                "NewPLC",

    42

                "MatchMD5",

    43

                "SetTraceVariablesList",

    44

                "GetTraceVariables",

    45

                "RemoteExec",

    46

                "GetLogMessage",

    47

                "ResetLogCount",

    48

                ]

    49

    50

SubscribedEvents = []

    51

    52

DoOnJoin = []

    53

    54

    55

def GetCallee(name):

    56

    """ Get Callee or Subscriber corresponding to '.' spearated object path """

    57

    global _PySrv

    58

    names = name.split('.')

    59

    obj = _PySrv.plcobj

    62

    return obj

    63

    64

    65

class WampSession(wamp.ApplicationSession):

    66

    67

    @inlineCallbacks

    68

    def onJoin(self, details):

    69

        global _WampSession

    70

        _WampSession = self

    71

        ID = self.config.extra["ID"]

    72

        print 'WAMP session joined by :', ID

    73

        for name in ExposedCalls:

    74

            reg = yield self.register(GetCallee(name), '.'.join((ID, name)))

    75

    76

        for name in SubscribedEvents:

    77

            reg = yield self.subscribe(GetCallee(name), name)

    78

    79

        for func in DoOnJoin:

    80

            yield func(self)

    81

    82

    def onLeave(self, details):

    83

        global _WampSession

    84

        _WampSession = None

    85

        print 'WAMP session left'

    86

    87

    88

class ReconnectingWampWebSocketClientFactory(WampWebSocketClientFactory, ReconnectingClientFactory):

    89

    def clientConnectionFailed(self, connector, reason):

    90

        print("WAMP Client connection failed .. retrying ..")

    91

        self.retry(connector)

    92

    93

    def clientConnectionLost(self, connector, reason):

    94

        print("WAMP Client connection lost .. retrying ..")

    95

        self.retry(connector)

    96

    97

    98

def LoadWampClientConf(wampconf):

    99

   100

    WSClientConf = json.load(open(wampconf))

   101

    return WSClientConf

   102

   103

   104

def RegisterWampClient(wampconf):

   105

   106

    WSClientConf = LoadWampClientConf(wampconf)

   107

   108

    # start logging to console

   109

    # log.startLogging(sys.stdout)

   110

   111

    # create a WAMP application session factory

   112

    component_config = types.ComponentConfig(

   113

        realm=WSClientConf["realm"],

   114

        extra={"ID": WSClientConf["ID"]})

   115

    session_factory = wamp.ApplicationSessionFactory(

   116

        config=component_config)

   117

    session_factory.session = WampSession

   118

   119

    # create a WAMP-over-WebSocket transport client factory

   120

    transport_factory = ReconnectingWampWebSocketClientFactory(

   121

        session_factory,

   122

        url=WSClientConf["url"],

   123

        serializers=[MsgPackSerializer()],

   124

        debug=False,

   125

        debug_wamp=False)

   126

   127

    # start the client from a Twisted endpoint

   128

    conn = connectWS(transport_factory)

   129

    print "WAMP client connecting to :", WSClientConf["url"]

   130

    return conn

   131

   132

   133

def GetSession():

   134

    global _WampSession

   135

    return _WampSession

   136

   137

   138

def SetServer(pysrv):

   139

    global _PySrv

   140

    _PySrv = pysrv