/*
 * Copyright 2007 Kevin Roe, Daniel Mccarney
 * This file is part of Jriver.
 *
 * Jriver is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * Jriver is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
package org.jriver.core;

import java.util.*;
import java.io.*;
import org.jriver.core.*;
import org.jriver.lib.*;

public class HeartBeat implements Runnable {
	final static int		HB_INTERVAL = 2000;
	private static HeartBeat	heartBeat;
	public ArrayList<Living>	livings = new ArrayList<Living>();

	public HeartBeat() {
	}

	public static HeartBeat getHeartBeat() {
		if(heartBeat == null) heartBeat = new HeartBeat();
		return heartBeat;
	}

	public void addLiving(Living living) {
		livings.add(living);
		System.out.println("HeartBeat activated in "+living.queryName());
	}

	public void removeLiving(Living living) {
		livings.remove(living);
		System.out.println("HeartBeat deactivated in "+living.queryName()+"["+living.getID()+"]");
	}

	public void run() {
		System.out.println("HeartBeat Singleton Initialized.");
		while(heartBeat != null) {
		try {
			Thread.currentThread().sleep(HB_INTERVAL);
		} catch (InterruptedException e) {
			e.printStackTrace();
		}
		if(livings != null) {
			Object[] all = livings.toArray();
			for(int x = 0; x < livings.size(); x++) {
				Living thisPlayer = (Living) all[x];
				thisPlayer.heartBeat();
			}
		}
		}
	}
}