Hi Arun,
first of all … welcome to the Apache Edgent list.
I had a quick look at your code … I guess you are assuming the temperature of
the sensor is within a given range, which it doesn’t seem to be. I guess it
starts at agiven point and then every new value differs from the previous by a
random value. I have seen it go from 0 to 300 or from 0 to -300 …
I updated your code a little and can see both “in” and “out of range” messages
so you can see what’s happening.
package org.apache.edgent.samples.topology;
import org.apache.edgent.analytics.sensors.Range;
import org.apache.edgent.analytics.sensors.Ranges;
import org.apache.edgent.providers.direct.DirectProvider;
import org.apache.edgent.topology.TStream;
import org.apache.edgent.topology.Topology;
import java.util.concurrent.TimeUnit;
public class Test {
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);
TStream<Double> inRangeTempReadings = tempReadings.filter(tuple ->
optimalTempRange.contains(tuple));
inRangeTempReadings.sink(tuple -> System.out.println("Temperature is in
range! "
+ "It is " + tuple + "\u00b0F!"));
TStream<Double> outOfRangeTempReadings = tempReadings.filter(tuple ->
!optimalTempRange.contains(tuple));
outOfRangeTempReadings.sink(tuple -> System.out.println("Temperature is
out of range! "
+ "It is " + tuple + "\u00b0F!"));
dp.submit(topology);
}
}
By the way … you didn’t need the “print” as with the sink you already had a
sink for your stream.
Chris
Von: arun subba <[email protected]>
Antworten an: "[email protected]" <[email protected]>
Datum: Sonntag, 27. Mai 2018 um 09:43
An: "[email protected]" <[email protected]>
Betreff: why isn't the filtering working?
[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?
