Пример #1
0
def createCSSClientObjects(cmdParser):
    """\

    Create the client objects needed to engage in the CSS-WC and CSS-TS protocols.
    :param cmdParser the command line parser object

    """
    args = cmdParser.args
    sysclock=SysClock()
    wallClock=TunableClock(sysclock,tickRate=1000000000) # nanos
    # measure precision of wall clock empirically
    wcPrecisionNanos = measurePrecision(wallClock) * 1000000000
    algorithm = LowestDispersionCandidate(wallClock,repeatSecs=0.3,timeoutSecs=0.3)
    wcClient=WallClockClient(cmdParser.wcBind, args.wcUrl[0], wallClock, algorithm)
    timelineClock = CorrelatedClock(wallClock, args.timelineClockFrequency)

    # start recording dispersion of the wall clock
    dispRecorder=DispersionRecorder(algorithm)
    dispRecorder.start()

    print "Connecting, requesting timeline for:"
    print "   Any contentId beginning with:", args.contentIdStem
    print "   and using timeline selector: ", args.timelineSelector
    print

    ts = TSClientClockController(args.tsUrl[0], args.contentIdStem, args.timelineSelector, timelineClock, correlationChangeThresholdSecs=0.0)
    return (ts, timelineClock, args.timelineClockFrequency, wcClient, wallClock, wcPrecisionNanos, dispRecorder)
Пример #2
0
def createCSSClientObjects(cmdParser):
    """\

    Create the client objects needed to engage in the CSS-WC and CSS-TS protocols.
    :param cmdParser the command line parser object

    """
    args = cmdParser.args
    sysclock=SysClock()
    wallClock=TunableClock(sysclock,tickRate=1000000000) # nanos
    # measure precision of wall clock empirically
    wcPrecisionNanos = measurePrecision(wallClock) * 1000000000
    algorithm = LowestDispersionCandidate(wallClock,repeatSecs=0.3,timeoutSecs=0.3)
    wcClient=WallClockClient(cmdParser.wcBind, args.wcUrl[0], wallClock, algorithm)
    timelineClock = CorrelatedClock(wallClock, args.timelineClockFrequency)

    # start recording dispersion of the wall clock
    dispRecorder=DispersionRecorder(algorithm)
    dispRecorder.start()

    print "Connecting, requesting timeline for:"
    print "   Any contentId beginning with:", args.contentIdStem
    print "   and using timeline selector: ", args.timelineSelector
    print

    ts = TSClientClockController(args.tsUrl[0], args.contentIdStem, args.timelineSelector, timelineClock, correlationChangeThresholdSecs=0.0)
    return (ts, timelineClock, args.timelineClockFrequency, wcClient, wallClock, wcPrecisionNanos, dispRecorder)
    def test_errorIfToEarly(self):

        algorithm = Mock_Algorithm()
        recorder = DispersionRecorder(algorithm)
        recorder.start()

        algorithm.onClockAdjusted(1000, 0, 0, 100, 2)

        self.assertRaises(ValueError, recorder.dispersionAt, 999)
    def test_recordsSimple(self):

        algorithm = Mock_Algorithm()
        recorder = DispersionRecorder(algorithm)
        recorder.start()

        algorithm.onClockAdjusted(1000, 0, 0, 100, 2)

        self.assertEquals(102, recorder.dispersionAt(1001))
Пример #5
0
    def test_errorIfToEarly(self):

        algorithm = Mock_Algorithm()
        recorder = DispersionRecorder(algorithm)
        recorder.start()

        algorithm.onClockAdjusted( 1000, 0, 0, 100, 2 )
            
        self.assertRaises(ValueError, recorder.dispersionAt, 999)
Пример #6
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    def test_recordsSimple(self):

        algorithm = Mock_Algorithm()
        recorder = DispersionRecorder(algorithm)
        recorder.start()

        algorithm.onClockAdjusted( 1000, 0, 0, 100, 2 )

        self.assertEquals(102, recorder.dispersionAt(1001))
    def test_multipleHistoryEntries(self):

        algorithm = Mock_Algorithm()
        recorder = DispersionRecorder(algorithm)
        recorder.start()

        algorithm.onClockAdjusted(1000, 0, 0, 100, 2)
        algorithm.onClockAdjusted(2000, 3, 1994, 110, 2)
        algorithm.onClockAdjusted(3000, -2, 2114, 90, 3)

        self.assertEquals(100 + 2, recorder.dispersionAt(1001))
        self.assertEquals(100 + 100, recorder.dispersionAt(1050))
        self.assertEquals(110 + 12, recorder.dispersionAt(2006))
        self.assertEquals(90 + 9, recorder.dispersionAt(3003))
Пример #8
0
    def test_multipleHistoryEntries(self):

        algorithm = Mock_Algorithm()
        recorder = DispersionRecorder(algorithm)
        recorder.start()

        algorithm.onClockAdjusted( 1000, 0,     0, 100, 2 )
        algorithm.onClockAdjusted( 2000, 3,  1994, 110, 2 )
        algorithm.onClockAdjusted( 3000, -2, 2114,  90, 3 )

        self.assertEquals( 100+  2, recorder.dispersionAt(1001))
        self.assertEquals( 100+100, recorder.dispersionAt(1050))
        self.assertEquals( 110+ 12, recorder.dispersionAt(2006))
        self.assertEquals(  90+  9, recorder.dispersionAt(3003))