SampleDataGenerator

package com.example.demo;

import java.util.LinkedList;

import org.springframework.beans.factory.annotation.Autowired;

public class RandomGenerator {
	
	@Autowired
	private WeatherDataRepository weatherRepository;

	private LinkedList<WeatherDataPOJO> listWeatherData = new LinkedList<WeatherDataPOJO>();
	public void generateWeatherData() {
		for(int i = 0; i < 100; i ++) {
			Long nextTimeStamp = (long) (i * 5 * 60 * 1000); 
			for(int j=0; j< 10000;j++) {
				WeatherDataPOJO WDP = new WeatherDataPOJO();
				WDP.setSensorID((int)j%10000);
				WDP.setTemperature((int) getRandomIntegerBetweenRange(2,55));
				WDP.setTemperature((int) getRandomIntegerBetweenRange(2,55));
				WDP.setTimeStamp(System.currentTimeMillis()/1000+(int) getRandomIntegerBetweenRange(0,300000) + nextTimeStamp);
				listWeatherData.add(WDP);
			}
		}
		
		weatherRepository.saveAll(listWeatherData);
	}
	
	public static double getRandomIntegerBetweenRange(double min, double max){
	    double x = (int)(Math.random()*((max-min)+1))+min;
	    return x;
	}
}