package javacore.threading;

import java.util.concurrent.CountDownLatch;

public class CountdownlatchExample {

	public static class Service implements Runnable{

		private String serviceName;
		private long timeToStart;
		private CountDownLatch latch;

		public Service(String serviceName, long timeToStart, CountDownLatch latch){
			this.serviceName =  serviceName;
			this.timeToStart = timeToStart;
			this.latch = latch;
		}

		@Override
		public void run() {
			try{
				Thread.sleep(234);
			}catch(InterruptedException ex){
				System.out.println();
			}
			System.out.println( this.serviceName + " is UP Now!");
			latch.countDown();
		}

	}

	public static void main(String[] args) {
		final CountDownLatch latch =  new CountDownLatch(4);
		Thread s1 = new Thread(new Service("Service1", 1000, latch));
		Thread s2 = new Thread(new Service("Service2", 1000, latch));
		Thread s3 = new Thread(new Service("Service3", 1000, latch));
		Thread s4 = new Thread(new Service("Service4", 1000, latch));

		s1.start();
		s2.start();
		s3.start();
		s4.start();

		try{
			latch.await();
			System.out.println("All Service are UP and Running!");
		}catch(InterruptedException ex){
			ex.printStackTrace();
		}

	}
}