notify-when-online.groovy

#!/usr/bin/env groovy

import javafx.embed.swing.JFXPanel;
import javafx.scene.media.Media;
import javafx.scene.media.MediaPlayer;

// if we can access google, we can access everything (?)
fxPanel = new JFXPanel();
file = new File("msg.mp3"); // of course you need a suitable audio file of your own
media = new Media(file.toURI().toString());
mediaPlayer = new MediaPlayer(media);
tries = 0;
boolean isConnected(){
	try{
		println("["+tries+"]"+" looking for connection...");
		url = new URL("http://www.google.com.ar");
		connection = url.openConnection();
		connection.connect();
		return true;
	} catch (Exception e){
		println("Something went wrong... looking for the interwebs...");
		sleep(5000); // 5s between attempts, reduce number if you're really impatient
		return isConnected();
	}
}

if(isConnected()){
	mediaPlayer.play();
	println("we are connected!");
	System.exit(0);
}