Flink 生成数据源

1.模拟数据生成

package com.claroja;

import org.apache.flink.streaming.api.functions.source.RichParallelSourceFunction;

import java.util.Random;

public class SensorSource extends RichParallelSourceFunction<SensorReading> {
    Boolean running = true;
    @Override
    public void run(SourceContext<SensorReading> sourceContext) throws Exception {
        Random rand = new Random();
        while(running){
            Long curTime = System.currentTimeMillis();
            for (int i = 0; i < 10; i++){
            	Double curTemp = rand.nextGaussian();
                SensorReading sensorReading = new SensorReading("sensor_"+i,curTime,curTemp);
                sourceContext.collect(sensorReading);
            }
            Thread.sleep(100);
        }
    }
    @Override
    public void cancel() {
        running = false;
    }
}

2.POJO

package com.claroja;

public class SensorReading {
    public SensorReading() {
    }

    public SensorReading(String id, Long timestamp, Double temperature) {
        this.id = id;
        this.timestamp = timestamp;
        this.temperature = temperature;
    }

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public Long getTimestamp() {
        return timestamp;
    }

    public void setTimestamp(Long timestamp) {
        this.timestamp = timestamp;
    }

    public Double getTemperature() {
        return temperature;
    }

    public void setTemperature(Double temperature) {
        this.temperature = temperature;
    }

    public String id;
    public Long timestamp;
    public Double temperature;

    @Override
    public String toString() {
        return "SensorReading{" +
                "id='" + id + '\'' +
                ", timestamp=" + timestamp +
                ", temperature=" + temperature +
                '}';
    }
}