def __init__(self, args):
        L(args.log)
        self.config = JOb(file(os.path.join(os.path.dirname(__file__), "..", "config.json"), "rb"))
        self.status = JSONObject()
        self.status.running = False
        self.wrappers = []
        ResourceManagement.args = args
        ResourceManagement.config = self.config
        self.clock = None
        self.annotator = GenericAnnotation()
        self.stoppedClock = False

        # init triplestore
        if args.triplestore:
            ThreadedTriplestoreAdapter.triplestore = TripleStoreFactory.getTripleStore(
                self.config.triplestore.driver, self.config.triplestore
            )
            # dump the graph with the static annotations
            StaticAnnotator.dumpGraph()

        if args.aggregate:
            # self.aggregator = AggregatorFactory.make(self.config.aggregationmethod, self.config.aggregation_configuration)
            # self.aggregator = AggregatorFactory.make()

            # TODO
            self.aggregator = GenericAggregator()
            self.aggregationQueue = QueueThread(handler=self.aggregateHandler)
        self.receiverQueue = QueueThread(handler=self.receiveHandler)

        # establish connection to the message bus
        if args.messagebus:
            threading.Thread(name="messageBusConnector", target=self.start_messagebus, args=(args,)).start()
        else:
            self.messageBusQueue = None

        if args.eventannotation:
            self.eventWrapper = GenericEventWrapper(self.messageBusQueue)
        else:
            self.eventWrapper = None

        if args.gdi:
            from CityPulseGdi.eu.citypulse.uaso.gdi.CityPulseGDInterface import CityPulseGDInterface

            self.gdiInterface = CityPulseGDInterface(self.config.gdi_db)
            #
            self.gdiInterface.removeAllSensorStreams()
        else:
            self.gdiInterface = None

        self.averageStreamQuality = None

        if args.sql:
            self.sql = SQL(self.config.gdi_db, self)
        else:
            self.sql = None

        self.startInterface()
        self.autodeploy()
def main():
	global stop_thread
	# start sending thread with queue
	qThread = QueueThread(handler=sendMessage)
	qThread.start()

	# start thread to republish received events until one with level 0 was received
	threading.Thread(target=republish_thread, args=(qThread,)).start()

	# start listening on the message bus for new 'repeatable' events
	mbc = MessageBusConsumer(REPEATABLE_EVENTS_EXCHANGE, "#", qThread)
	threading.Thread(target=mbc.start).start()

	raw_input("Press ENTER to stop.\n")
	print "stoping threads...",
	stop_thread = True
	mbc.stop()
	print "done"
예제 #3
0
def main():
    global stop_thread
    # start sending thread with queue
    qThread = QueueThread(handler=sendMessage)
    qThread.start()

    # start thread to republish received events until one with level 0 was received
    threading.Thread(target=republish_thread, args=(qThread, )).start()

    # start listening on the message bus for new 'repeatable' events
    mbc = MessageBusConsumer(REPEATABLE_EVENTS_EXCHANGE, "#", qThread)
    threading.Thread(target=mbc.start).start()

    raw_input("Press ENTER to stop.\n")
    print "stoping threads...",
    stop_thread = True
    mbc.stop()
    print "done"
 def __init__(self):
     self.config = JSONObject(file(os.path.join(os.path.dirname(__file__), "..", "config.json"), "rb"))
     self.host = self.config.rabbitmq.host
     self.port = self.config.rabbitmq.port
     # self.rabbitmqconnection, self.rabbitmqchannel = RabbitMQ.establishConnection(self.host, self.port)
     self.messageBusReceiveQueue = QueueThread(handler=self.receiveEventHandler)
     self.messageBusSendQueue = QueueThread(handler=self.sendAnnotatedEventHandler)
     self.wrappers = []
     self.splitters = None
     self.annotator = GenericAnnotation()
     self.exchange = RabbitMQ.exchange_annotated_event
    def start_messagebus(self, args):
        L.i("Connecting to the message bus")
        self.messageBusQueue = QueueThread(handler=self.sendMessageHandler)
        try:

            # prepare RabbitMQ configuration
            rmq_host = str(self.config.rabbitmq.host)
            rmq_port = self.config.rabbitmq.port
            rmq_username = self.config.rabbitmq.username if "username" in self.config.rabbitmq else None
            rmq_password = self.config.rabbitmq.username if "password" in self.config.rabbitmq else None
            if rmq_username:
                if rmq_password:
                    RabbitMQ.establishConnection(rmq_host, rmq_port, rmq_username, rmq_password)
                else:
                    RabbitMQ.establishConnection(rmq_host, rmq_port, rmq_username)
            else:
                RabbitMQ.establishConnection(rmq_host, rmq_port)
            L.i("Connected to the message bus")
            self.messageBusQueue.start()
        except MessageBusConnectionError:
            self.args.messagebus = False
            args.messagebus = False
            L.w("Could not connect to MessageBus server. Disabling MessageBus feature.")
class ResourceManagement(virtualisation.wrapper.wrapperoutputreceiver.AbstractReceiver):
    deployfoldername = os.path.join(os.path.dirname(__file__), "..", "autodeploy")
    eventdescriptionfoldername = os.path.join(os.path.dirname(__file__), "..", "eventdescriptions")
    args = None
    config = None

    def __init__(self, args):
        L(args.log)
        self.config = JOb(file(os.path.join(os.path.dirname(__file__), "..", "config.json"), "rb"))
        self.status = JSONObject()
        self.status.running = False
        self.wrappers = []
        ResourceManagement.args = args
        ResourceManagement.config = self.config
        self.clock = None
        self.annotator = GenericAnnotation()
        self.stoppedClock = False

        # init triplestore
        if args.triplestore:
            ThreadedTriplestoreAdapter.triplestore = TripleStoreFactory.getTripleStore(
                self.config.triplestore.driver, self.config.triplestore
            )
            # dump the graph with the static annotations
            StaticAnnotator.dumpGraph()

        if args.aggregate:
            # self.aggregator = AggregatorFactory.make(self.config.aggregationmethod, self.config.aggregation_configuration)
            # self.aggregator = AggregatorFactory.make()

            # TODO
            self.aggregator = GenericAggregator()
            self.aggregationQueue = QueueThread(handler=self.aggregateHandler)
        self.receiverQueue = QueueThread(handler=self.receiveHandler)

        # establish connection to the message bus
        if args.messagebus:
            threading.Thread(name="messageBusConnector", target=self.start_messagebus, args=(args,)).start()
        else:
            self.messageBusQueue = None

        if args.eventannotation:
            self.eventWrapper = GenericEventWrapper(self.messageBusQueue)
        else:
            self.eventWrapper = None

        if args.gdi:
            from CityPulseGdi.eu.citypulse.uaso.gdi.CityPulseGDInterface import CityPulseGDInterface

            self.gdiInterface = CityPulseGDInterface(self.config.gdi_db)
            #
            self.gdiInterface.removeAllSensorStreams()
        else:
            self.gdiInterface = None

        self.averageStreamQuality = None

        if args.sql:
            self.sql = SQL(self.config.gdi_db, self)
        else:
            self.sql = None

        self.startInterface()
        self.autodeploy()

    def _startQueues(self):
        if not self.receiverQueue.is_alive():
            self.receiverQueue.start()
        # since we need to send messages when a new wrapper is added, the messageBusQueue needs to be started in __init__
        # if self.args.messagebus:
        #     self.messageBusQueue.start()
        if ResourceManagement.args.aggregate:
            if not self.aggregationQueue.is_alive():
                self.aggregationQueue.start()
        if self.eventWrapper:
            if not self.eventWrapper.isStarted():
                self.eventWrapper.start()

    def start_messagebus(self, args):
        L.i("Connecting to the message bus")
        self.messageBusQueue = QueueThread(handler=self.sendMessageHandler)
        try:

            # prepare RabbitMQ configuration
            rmq_host = str(self.config.rabbitmq.host)
            rmq_port = self.config.rabbitmq.port
            rmq_username = self.config.rabbitmq.username if "username" in self.config.rabbitmq else None
            rmq_password = self.config.rabbitmq.username if "password" in self.config.rabbitmq else None
            if rmq_username:
                if rmq_password:
                    RabbitMQ.establishConnection(rmq_host, rmq_port, rmq_username, rmq_password)
                else:
                    RabbitMQ.establishConnection(rmq_host, rmq_port, rmq_username)
            else:
                RabbitMQ.establishConnection(rmq_host, rmq_port)
            L.i("Connected to the message bus")
            self.messageBusQueue.start()
        except MessageBusConnectionError:
            self.args.messagebus = False
            args.messagebus = False
            L.w("Could not connect to MessageBus server. Disabling MessageBus feature.")

    def __all_sensordescriptions(self):
        sds = []
        for w in self.wrappers:
            if not isinstance(w.getSensorDescription(), list):
                sds += [w.getSensorDescription()]
            else:
                sds += w.getSensorDescription()
        return sds

    def autodeploy(self):
        deployFolder = os.path.join(ResourceManagement.deployfoldername, "*.zip")
        files = glob.glob(deployFolder)
        for f in files:
            self.deploy(f)
        self.status.running = True

    def deploy(self, f, autostart=False):
        """

        :param f:
        :param autostart:
        :return: a tuple with 3 elements. 1. status as string, 2. error message as string, 3. list of uuids of added wrapper
        """
        L.i("Deploying", f)
        sensordescriptions = []
        try:
            zFile = zipfile.ZipFile(f)
            if "deploy.json" in zFile.namelist():
                deployDescription = JOb(zFile.open("deploy.json", "r"))
                sys.path.insert(0, f)
                if deployDescription.isList():
                    for dd in deployDescription:
                        module = __import__(dd.module)
                        wrapper = getattr(module, dd["class"])()
                        self.addWrapper(wrapper)
                        sensordescriptions.append(wrapper.getSensorDescription())
                        if autostart:
                            self.startWrapper(wrapper)
                else:
                    module = __import__(deployDescription.module)
                    wrapper = getattr(module, deployDescription["class"])()
                    self.addWrapper(wrapper)
                    sensordescriptions.append(wrapper.getSensorDescription())
                    if autostart:
                        self.startWrapper(wrapper)
            return "OK", "", sensordescriptions
        except Exception as e:
            L.w("Deployment of wrapper", f, "failed.", e.message)
            return "Fail", e.message, []

    def registerEvent(self, eventDescriptionFile):
        if self.eventWrapper:
            eventDescription = EventDescription(open(eventDescriptionFile, "rb"))
            if not eventDescription.test():
                return "Fail", "Invalid EventDescription"
            self.eventWrapper.registerEvent(eventDescription)
            return "Ok", ""
        else:
            return "Fail", "Event wrapper disabled"

    def startInterface(self):
        self.ui = Ui(self)
        self.ui.api = Api(self)
        self.ui.stat_api = Stat_Api(self)
        threading.Thread(target=cherrypy.quickstart, args=(self.ui, "/", self.config.interface.raw())).start()

    def stopInterface(self):
        cherrypy.engine.exit()

    def test(self):
        # from wrapper_dev.osna_dummy.osna_dummy_wrapper import OsnaDummyWrapper
        # wrapper = OsnaDummyWrapper()
        # self.addWrapper(wrapper)
        # from wrapper_dev.london_traffic.londontrafficwrapper import LondonTrafficWrapper
        # wrapper = LondonTrafficWrapper()
        # self.addWrapper(wrapper)
        # from wrapper_dev.aarhus_traffic.aarhustrafficwrapper import AarhusTrafficWrapper
        # wrapper = AarhusTrafficWrapper()
        # self.addWrapper(wrapper)
        # from wrapper_dev.aarhus_parking.aarhusparkingwrapper import AarhusParkingWrapper
        # wrapper = AarhusParkingWrapper()
        # self.addWrapper(wrapper)
        # from wrapper_dev.brasov_pollution.brasovpollutionwrapper import BrasovPollutionWrapper
        # wrapper = BrasovPollutionWrapper()
        # self.addWrapper(wrapper)
        # from wrapper_dev.romania_weather.romaniaweather_aw import RomanianWeatherAWWrapper
        # wrapper = RomanianWeatherAWWrapper()
        # self.addWrapper(wrapper)
        # from wrapper_dev.romania_weather.romaniaweather_mr import RomanianWeatherMRWrapper
        # wrapper = RomanianWeatherMRWrapper()
        # self.addWrapper(wrapper)
        # from wrapper_dev.brasov_incidents.brasov_incidents import BrasovIncidentWrapper0, BrasovIncidentWrapper1
        # wrapper = BrasovIncidentWrapper0()
        # self.addWrapper(wrapper)
        # wrapper = BrasovIncidentWrapper1()
        # self.addWrapper(wrapper)
        # from wrapper_dev.aarhus_pollution.aarhuspollutionwrapper import ComposedAarhusPollutionWrapper
        # wrapper = ComposedAarhusPollutionWrapper()
        # self.addWrapper(wrapper)
        # from wrapper_dev.twitter_stream.twitter import AarhusTwitterWrapper
        # wrapper = AarhusTwitterWrapper()
        # self.addWrapper(wrapper)
        from wrapper_dev.WrapperBusStations.brasovbusstationwrapper import BrasovBusStationWrapper

        wrapper = BrasovBusStationWrapper()
        self.addWrapper(wrapper)

        if self.args.eventannotation:
            from wrapper_dev.aarhus_traffic.aarhustrafficeventwrapper import AarhusTrafficEventWrapper

            atew = AarhusTrafficEventWrapper()
            self.eventWrapper.registerEvent(atew.getEventDescription())

    def addWrapper(self, wrapper):
        # TODO: this should not be here
        if ResourceManagement.args.cleartriplestore:
            self.deleteGraphs(wrapper)
        sd = wrapper.getSensorDescription()
        try:
            if isinstance(sd, list):
                for _sd in sd:
                    try:
                        _sd.test()
                        if ResourceManagement.args.aggregate:
                            self.aggregator.wrapper_added(_sd)
                        if self.gdiInterface:
                            self.gdiInterface.registerSensorStreamFromWKT(
                                _sd.uuid, _sd.sensorID, _sd.sensorType, _sd.location, _sd.location_epsg or 4326
                            )
                        # if self.sql:
                        #     self.sql.create_table(_sd)
                        L.i("added wrapper with ID", _sd.sensorID)
                    except Exception as ex:
                        L.e("Error deploying wrapper:", str(ex))
            else:
                try:
                    sd.test()
                    if ResourceManagement.args.aggregate:
                        self.aggregator.wrapper_added(sd)
                    if self.gdiInterface:
                        self.gdiInterface.registerSensorStreamFromWKT(
                            sd.uuid, sd.sensorID, sd.sensorType, sd.location, sd.location_epsg or 4326
                        )
                    # if self.sql:
                    #     self.sql.create_table(sd)
                    L.i("added wrapper with ID", sd.sensorID)
                except Exception as ex:
                    L.e("Error deploying wrapper:", str(ex))

            if ResourceManagement.args.triplestore or ResourceManagement.args.messagebus:
                # StaticAnnotator.staticAnnotationSensor(wrapper, self.config, self.messageBusQueue, self.rabbitmqchannel)
                StaticAnnotator.threadedStaticAnnotationSensor(wrapper, self.config, self.messageBusQueue, self.ui.api)
            if ResourceManagement.args.messagebus:
                wrapper.setMessageBusQueue(self.messageBusQueue)
            self.wrappers.append(wrapper)
        except Exception as ex:
            L.e(self.__class__.__name__, "Error in addWrapper:", str(ex))

    def removeWrapper(self, uuid):
        """
        Removes a wrapper identified by its UUID
        :param uuid:
        :return: True if successful, otherwise False
        """
        for i in range(0, len(self.wrappers)):
            sd = self.wrappers[i].getSensorDescription()
            if isinstance(sd, list):
                for j in range(0, len(sd)):
                    if str(sd[j].uuid) == uuid:
                        self.wrappers[i].stop(j)
                        if self.args.gdi:
                            self.gdiInterface.removeSensorStream(uuid)
                        return True
            else:
                if str(sd.uuid) == uuid:
                    self.wrappers[i].stop()
                    self.wrappers[i : i + 1] = []
                    self.gdiInterface.removeSensorStream(uuid)
                    return True
        return False

    def getSensorDescriptionByUUID(self, uuid):
        for sd in self.__all_sensordescriptions():
            if str(sd.uuid) == uuid:
                return sd
        return None

    def getEventDescriptionByUUID(self, uuid):
        if self.eventWrapper:
            return self.eventWrapper.getEventDescriptionByUUID(uuid)

    def getWrapperByUUID(self, uuid):
        from virtualisation.wrapper.abstractwrapper import AbstractComposedWrapper, AbstractWrapper

        for w in self.wrappers:
            if isinstance(w, AbstractWrapper):
                if str(w.getSensorDescription().uuid) == uuid:
                    return w
            elif isinstance(w, AbstractComposedWrapper):
                for ww in w.wrappers:
                    if str(ww.getSensorDescription().uuid) == uuid:
                        return ww
        return None

    def getUUIDsForCategory(self, category):
        from virtualisation.wrapper.abstractwrapper import AbstractComposedWrapper, AbstractWrapper

        uuidList = []
        for w in self.wrappers:
            if isinstance(w, AbstractWrapper):
                if str(w.getSensorDescription().sensorType) == category:
                    uuidList.append(w.getSensorDescription().uuid)
            elif isinstance(w, AbstractComposedWrapper):
                for ww in w.wrappers:
                    if str(ww.getSensorDescription().sensorType) == category:
                        uuidList.append(ww.getSensorDescription().uuid)
        return uuidList

    def getEventWrapperDescriptions(self):
        if not self.eventWrapper:
            return None

        return map(lambda (k, v): v, self.eventWrapper.eventDescriptions.iteritems())

    def deleteGraphs(self, wrapper):
        graphNames = wrapper.getGraphName()
        if type(graphNames) is str:  # abstract wrapper returns one graph name
            ThreadedTriplestoreAdapter.getOrMake(graphNames).deleteGraph(graphNames)
        else:
            for graphName in graphNames:  # composed abstract wrapper returns set with graph names
                ThreadedTriplestoreAdapter.getOrMake(graphName).deleteGraph(graphName)

    def startReplay(self):
        # cherrypy.tree.mount(dowser.Root(), '/dowser')
        self._startQueues()
        method = self.replayEnd
        args = None

        start_time = datetime.datetime.now()

        # if continuelive enabled set "start" as method to set the system to live mode if historic replay is finished
        if ResourceManagement.args.continuelive:
            method = self.start
            args = True

        if ResourceManagement.args.speed:
            self.clock = ReplayClock(ResourceManagement.args.speed, endCallback=method, endCallbackArgs=args)
        else:
            self.clock = ReplayClock(endCallback=method)

        if ResourceManagement.args.end and ResourceManagement.args.start:
            try:
                startDate = datetime.datetime.strptime(ResourceManagement.args.start, ReplayClock.parserformat)
                endDate = datetime.datetime.strptime(ResourceManagement.args.end, ReplayClock.parserformat)
                # for w in self.wrappers:
                #     w.setTimeframe(startDate, endDate)
                if startDate > endDate:
                    L.w("start date after end date. Changing both")
                    tmp = endDate
                    endDate = startDate
                    startDate = tmp
                self.clock.setTimeframe(startDate, endDate)
            except Exception as e:
                L.e("Problem parsing start- or end date:", str(e))
                raise e

        else:
            raise Exception("start- and enddate required for replay mode")

        if ResourceManagement.args.pt:
            from virtualisation.resourcemanagement.performancetestreceiver import PerformanceMeterMinutes

            performancetest = PerformanceMeterMinutes()  # PerformanceMeterSeconds()

        for w in self.wrappers:
            w.setReplayMode(True)
            w.setClock(self.clock)
            w.setTimeframe(startDate, endDate)
            w.addReceiver(self)
            if ResourceManagement.args.pt:
                w.addReceiver(performancetest)
            w.start()
            w.runReplay()

        if not self.args.noQuality:
            if not self.averageStreamQuality:
                self.averageStreamQuality = AverageStreamQuality(self, self.clock)
            else:
                self.averageStreamQuality.setClock(self.clock)
        self.clock.runAsync()
        self.startMonitor()

        if not ResourceManagement.args.continuelive:
            raw_input("press Enter to end.\n")
            self.clock.stop()
            L.i("Runtime", datetime.datetime.now() - start_time)

    def start(self, restart=False):
        self._startQueues()
        if self.clock:
            self.clock.stop()
        self.clock = RealClock(self.end)

        if ResourceManagement.args.pt:
            from virtualisation.resourcemanagement.performancetestreceiver import PerformanceMeterMinutes

            performancetest = PerformanceMeterMinutes()

        for w in self.wrappers:
            self.startWrapper(w, restart)
            if ResourceManagement.args.pt:
                w.addReceiver(performancetest)
        L.i(datetime.datetime.now())

        if not self.args.noQuality:
            if not self.averageStreamQuality:
                self.averageStreamQuality = AverageStreamQuality(self, self.clock)
            else:
                self.averageStreamQuality.setClock(self.clock)

        self.clock.runAsync()

        raw_input("press Enter to end.\n")
        self.clock.stop()

    def startWrapper(self, w, restart=False):
        w.setReplayMode(False)
        w.setClock(self.clock)
        if not restart:
            w.addReceiver(self)
        w.start()
        w.run()
        w.update()

    def replayEnd(self):
        if self.monitorTimer:
            self.monitorTimer.cancel()
            self.monitorTimer = None
        self.end()

    def end(self):
        for w in self.wrappers:
            w.stop()
        if ResourceManagement.args.messagebus:
            self.messageBusQueue.stop()
        if ResourceManagement.args.aggregate:
            self.aggregationQueue.stop()
        if self.eventWrapper:
            self.eventWrapper.stop()
        self.receiverQueue.stop()
        if ResourceManagement.args.triplestore:
            ThreadedTriplestoreAdapter.stop()
        self.stopInterface()
        L.i("REPLAY ENDED")

    # def registerExchanges(self):
    #     try:
    #         for ex in RabbitMQ.exchanges:
    #             RabbitMQ.declareExchange(ex, _type="topic")
    #     except Exception as e:
    #         L.e('Exchange could not be declare: %s' % e.message)

    def sendMessageHandler(self, item):
        message, exchange, key = item
        L.d2(message)
        RabbitMQ.sendMessage(message, exchange, key)
        del message

    def aggregateHandler(self, item):
        # TODO
        data, sensordescription = item
        aggs = self.aggregator.aggregate(data, sensordescription)
        if ResourceManagement.args.messagebus and aggs:
            for agg in aggs:
                annotated_agg = self.annotator.annotateAggregation(agg, sensordescription)
                msg = annotated_agg.serialize(format="n3")
                self.messageBusQueue.add(
                    (msg, RabbitMQ.exchange_aggregated_data, sensordescription.messagebus.routingKey)
                )
            del aggs
        pass

    def receive(self, parsedData, sensordescription, clock, quality):
        # L.i("Received data from", sensordescription.fullSensorID)
        if len(parsedData.fields) != 0:
            self.receiverQueue.add((parsedData, sensordescription, clock, quality))

    def monitor(self):
        # change speed level in replay mode to avoid high memory consumption
        # L.e("Monitor, Queue Size:", self.receiverQueue.getQueueSize())
        if self.receiverQueue.getQueueSize() > 1000:
            if not self.stoppedClock:
                self.clock.pause()
                self.stoppedClock = True
                # L.e("Monitor stop clock, Queue Size:", self.receiverQueue.getQueueSize())
        elif self.receiverQueue.getQueueSize() < 500:
            if self.stoppedClock:
                self.clock.continue_running()
                self.stoppedClock = False
                # L.e("Monitor continue clock, Queue Size:", self.receiverQueue.getQueueSize())
        if self.monitorTimer:
            self.startMonitor()

    def startMonitor(self):
        self.monitorTimer = threading.Timer(10, self.monitor)
        self.monitorTimer.start()

    def receiveHandler(self, item):
        parsedData, sensordescription, clock, quality = item
        L.d2(parsedData)
        # print parsedData
        if self.sql:
            self.sql.insert_observation(sensordescription, parsedData, dictdeepcopy(quality))

        if ResourceManagement.args.messagebus or ResourceManagement.args.triplestore:
            # if len(parsedData.fields)>0:
            g = self.annotator.annotateObservation(parsedData, sensordescription, clock, quality)

        del quality
        if (
            ResourceManagement.args.messagebus
            and not sensordescription.no_publish_messagebus
            and "fields" in parsedData
            and len(parsedData.fields) > 0
        ):
            message = g.serialize(format="n3")
            # print message
            key = sensordescription.messagebus.routingKey
            # self.messageBusQueue.add((parsedData.dumps(), self.rabbitmqchannel, RabbitMQ.exchange_data, key))
            self.messageBusQueue.add((message, RabbitMQ.exchange_annotated_data, key))
            if self.ui.api:
                self.ui.api.update_observation_cache(str(sensordescription.uuid), message)
        if ResourceManagement.args.triplestore:
            # TODO: The following line is commented out, since the Virtuoso makes so much trouble
            # ThreadedTriplestoreAdapter.getOrMake(sensordescription.graphName).addGraph(g)
            pass
        if ResourceManagement.args.messagebus or ResourceManagement.args.triplestore:
            del g
        if ResourceManagement.args.aggregate:
            self.aggregationQueue.add((parsedData, sensordescription))
        else:
            del parsedData
class AbstractEventWrapper(object):
    __metaclass__ = abc.ABCMeta

    def __init__(self):
        self.config = JSONObject(file(os.path.join(os.path.dirname(__file__), "..", "config.json"), "rb"))
        self.host = self.config.rabbitmq.host
        self.port = self.config.rabbitmq.port
        # self.rabbitmqconnection, self.rabbitmqchannel = RabbitMQ.establishConnection(self.host, self.port)
        self.messageBusReceiveQueue = QueueThread(handler=self.receiveEventHandler)
        self.messageBusSendQueue = QueueThread(handler=self.sendAnnotatedEventHandler)
        self.wrappers = []
        self.splitters = None
        self.annotator = GenericAnnotation()
        self.exchange = RabbitMQ.exchange_annotated_event

    @abc.abstractmethod
    def getEventDescription(self):
        """
        :return: a event description
        """
        pass

    @classmethod
    def getFileObject(cls, currentfile, filename, mode="r"):
        parent = os.path.dirname(currentfile)
        if parent.endswith(".zip"):
            zFile = zipfile.ZipFile(parent)
            return zFile.open(filename, mode)
        else:
            return file(os.path.join(parent, filename), mode)
    # def addWrapper(self, wrapper):
    #     """
    #     adds a wrapper to the internal wrapper list
    #     :param wrapper:
    #     :return:
    #     """
    #     if not isinstance(wrapper, AbstractEventWrapper):
    #         raise Exception(error="trying to add a wrapper of the wrong instance. Requires AbstractEventWRapper")
    #     self.wrappers.append(wrapper)

    def start(self):
        "@Daniel P: The ResourceManagement declares all available exchanges. I guess this is unnecessary therefore."
        # RabbitMQ.declareExchange(self.rabbitmqchannel, self.exchange, _type="topic")
        queue = RabbitMQ.channel.queue_declare()
        queue_name = queue.method.queue
        # in the following line the exchange should be RabbitMQ.exchange_event
        RabbitMQ.channel.queue_bind(exchange=self.exchange, queue=queue_name,
                                        routing_key=self.getEventDescription().messagebus.routingKey)


    def run(self):
        """
        start listening on the event detection component
        :return:
        """
        # self.__forEachWrapper("run")
        self.runthread = threading.Thread(target=self._run)
        self.runthread.start()

    def _run(self):
        self.channel.basic_consume(self.receiveEventHandler, no_ack=True)
        self.channel.start_consuming()

    def receiveEventHandler(self, channel, method, properties, body):
        """
        Receives messages throught the message bus, annotates the event
         and sends the annotated event
        :param channel:
        :param method:
        :param properties:
        :param body:
        :return:
        """
        event = json.loads(body)
        annotatedevent = self.annotateEvent(event)
        self.messageBusSendQueue.add(annotatedevent)

    def annotateEvent(self, event):
        """
        Annotates the event and saves the graph in the triple store
        :param event:
        :return: returns the annotated graph of the event
        """
        graph = self.annotator.annotateEvent(event, self.getEventDescription())
        ThreadedTriplestoreAdapter.getOrMake(self.getEventDescription().graphname)
        return graph

    def sendAnnotatedEventHandler(self, annotatedevent):
        key = self.getEventDescription().messagebus.routingKey
        message = annotatedevent.serialize(format='n3')
        RabbitMQ.sendMessage(message, self.exchange, key)