connectors/src/main/java/org/apache/edgent/samples/connectors/iotp/IotpQuickstart.java

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package org.apache.edgent.samples.connectors.iotp;

import java.util.Random;
import java.util.concurrent.TimeUnit;

import org.apache.edgent.connectors.iot.IotDevice;
import org.apache.edgent.connectors.iot.QoS;
import org.apache.edgent.connectors.iotp.IotpDevice;
import org.apache.edgent.providers.direct.DirectProvider;
import org.apache.edgent.topology.TStream;
import org.apache.edgent.topology.Topology;

import com.google.gson.JsonObject;

/**
 * IBM Watson IoT Platform Quickstart sample.
 * Submits a JSON device event every second using the
 * same format as the Quickstart device simulator,
 * with keys {@code temp}, {@code humidity}  and {@code objectTemp}
 * and random values.
 * <P>
 * The device type is {@code iotsamples-edgent} and a random
 * device identifier is generated. Both are printed out when
 * the application starts.
 * </P>
 * A URL is also printed that allows viewing of the data
 * as it received by the Quickstart service.
 *
 * <p>See {@code scripts/connectors/iotp/README} for information about running the sample.
 */
public class IotpQuickstart {

    public static void main(String[] args) {

        DirectProvider tp = new DirectProvider();
        Topology topology = tp.newTopology("IotpQuickstart");
        
        // Declare a connection to IoTF Quickstart service
        String deviceId = "qs" + Long.toHexString(new Random().nextLong());
        IotDevice device = IotpDevice.quickstart(topology, deviceId);
        
        System.out.println("Quickstart device type:" + IotpDevice.QUICKSTART_DEVICE_TYPE);
        System.out.println("Quickstart device id  :" + deviceId);
        System.out.println("https://quickstart.internetofthings.ibmcloud.com/#/device/"
             + deviceId);
             
        Random r = new Random();
        TStream<double[]> raw = topology.poll(() -> {
            double[]  v = new double[3];
            
            v[0] = r.nextGaussian() * 10.0 + 40.0;
            v[1] = r.nextGaussian() * 10.0 + 50.0;
            v[2] = r.nextGaussian() * 10.0 + 60.0;
            
            return v;
        }, 1, TimeUnit.SECONDS);
        
        TStream<JsonObject> json = raw.map(v -> {
            JsonObject j = new JsonObject();
            j.addProperty("temp", v[0]);
            j.addProperty("humidity", v[1]);
            j.addProperty("objectTemp", v[2]);
            return j;
        });
        
        device.events(json, "sensors", QoS.FIRE_AND_FORGET);

        tp.submit(topology);
    }
}