runtime/WampClient.py
author Edouard Tisserant
Wed, 25 Feb 2015 13:59:01 +0100
changeset 1451 94e620cbd9de
parent 1446 4963e3816641
child 1511 91538d0c242c
permissions -rw-r--r--
Added Ronan Bignaux (genesis) patch to use wxversion. Fixed side effects with sys.path. Other cosmetic fixes about path included.
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#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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import sys
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#from twisted.python import log
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from autobahn.twisted import wamp
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from autobahn.twisted.websocket import WampWebSocketClientFactory, connectWS
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from twisted.internet.defer import inlineCallbacks
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from autobahn.wamp import types
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from autobahn.wamp.serializer import MsgPackSerializer
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from twisted.internet.protocol import ReconnectingClientFactory
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import json
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_WampSession = None
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_PySrv = None
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ExposedCalls = ["StartPLC",
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                "StopPLC",
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                "ForceReload",
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                "GetPLCstatus",
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                "NewPLC",
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                "MatchMD5",
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                "SetTraceVariablesList",
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                "GetTraceVariables",
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                "RemoteExec",
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                "GetLogMessage",
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                "ResetLogCount",
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                ]
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SubscribedEvents = []
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DoOnJoin = []
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def GetCallee(name):
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    """ Get Callee or Subscriber corresponding to '.' spearated object path """
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    global _PySrv
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    names = name.split('.')
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    obj = _PySrv.plcobj
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    while names: obj = getattr(obj, names.pop(0))
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    return obj
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class WampSession(wamp.ApplicationSession):
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    @inlineCallbacks
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    def onJoin(self, details):
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        global _WampSession
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        _WampSession = self
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        ID = self.config.extra["ID"]
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        print 'WAMP session joined by :', ID
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        for name in ExposedCalls:
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            reg = yield self.register(GetCallee(name), '.'.join((ID,name)))
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        for name in SubscribedEvents:
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            reg = yield self.subscribe(GetCallee(name), name)
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        for func in DoOnJoin:
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            yield func(self)
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    def onLeave(self, details):
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        global _WampSession
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        _WampSession = None
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        print 'WAMP session left'
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class ReconnectingWampWebSocketClientFactory(WampWebSocketClientFactory, ReconnectingClientFactory):
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    def clientConnectionFailed(self, connector, reason):
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        print("WAMP Client connection failed .. retrying ..")
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        self.retry(connector)
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    def clientConnectionLost(self, connector, reason):
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        print("WAMP Client connection lost .. retrying ..")
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        self.retry(connector)
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def LoadWampClientConf(wampconf):
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    WSClientConf = json.load(open(wampconf))
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    return WSClientConf
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def RegisterWampClient(wampconf):
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    WSClientConf = LoadWampClientConf(wampconf)
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    ## start logging to console
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    # log.startLogging(sys.stdout)
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    # create a WAMP application session factory
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    component_config = types.ComponentConfig(
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        realm = WSClientConf["realm"],
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        extra = {"ID":WSClientConf["ID"]})
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    session_factory = wamp.ApplicationSessionFactory(
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        config = component_config)
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    session_factory.session = WampSession
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    # create a WAMP-over-WebSocket transport client factory
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    transport_factory = ReconnectingWampWebSocketClientFactory(
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        session_factory,
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        url = WSClientConf["url"],
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        serializers = [MsgPackSerializer()],
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        debug = False,
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        debug_wamp = False)
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    # start the client from a Twisted endpoint
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    conn = connectWS(transport_factory)
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    print "WAMP client connecting to :",WSClientConf["url"]
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    return conn
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def GetSession():
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    global _WampSession
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    return _WampSession
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def SetServer(pysrv):
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    global _PySrv
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    _PySrv = pysrv
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