why isn't the filtering working?

[arun subba]

[cid:2fdbea19-7190-445c-86fe-c21253206e6c]

Hi,

    I am trying to implement Apache Edgent in my project but before that I ran 
into a problem. The basic objective up till now is to filter the readings of 
temperature sensor, but unfortunately I could not understand the error that I 
am getting. I have been following the Apache Edgent Documentation but does not 
help my queries. The code is as follows:


static double OPTIMAL_TEMP_LOW = 80.0;
    static double OPTIMAL_TEMP_HIGH = 85.0;
    static Range<Double> optimalTempRange = Ranges.closed(OPTIMAL_TEMP_LOW, 
OPTIMAL_TEMP_HIGH);

    public static void main(String[] args) throws Exception {
        TempSensor sensor = new TempSensor();
        DirectProvider dp = new DirectProvider();
        Topology topology = dp.newTopology();


        TStream<Double> tempReadings = topology.poll(sensor, 1, 
TimeUnit.MILLISECONDS).filter(tuple ->
                !optimalTempRange.contains(tuple));
 tempReadings.sink(tuple -> System.out.println("Temperature is out of range! "
        + "It is " + tuple + "\u00b0F!"));
 tempReadings.print();



        dp.submit(topology);
}

This program outputs the above figure with no Message. Why is it so?