gistfile1.java

public class DeadManSwitch implements Runnable{

	public static DeadManSwitch instance;
	private Thread serverThread    = null;
	private MinecraftServer server = null;
	private Long timer             = 0L;
	
	public DeadManSwitch(MinecraftServer server, Thread serverThread){
		this.server       = server;
		this.serverThread = serverThread;
		DeadManSwitch.instance = this;
		
	}
	
	public synchronized void setTimer(){
		this.timer  = System.nanoTime();
	}

	public synchronized long getTimer(){
		return this.timer;
	}	
	
	@Override
	public void run() {
		
		System.out.printf("Starting Dead Man Switch\n");
		
		while (server.isServerRunning()){
			try{			
				long deltaTime = System.nanoTime() - this.getTimer();
				if (deltaTime / 1000. / 1000. > 75.){
					System.out.printf("==== Main thread is staled ! %.3f ms ====\n", deltaTime / 1000. / 1000.);
				}

				Thread.sleep(1L);			
			} catch (InterruptedException e){
				throw new RuntimeException(e);
			}			
		}
		
		
	}
	
	public static DeadManSwitch startDeadManSwitch(MinecraftServer server){
		DeadManSwitch deadManSwitch = new DeadManSwitch(server, Thread.currentThread());
		Thread deadManSwitchThrd = new Thread(deadManSwitch);
		deadManSwitchThrd.setName("Dead Man Switch");
		deadManSwitchThrd.setPriority(Thread.MAX_PRIORITY);
		//deadManSwitchThrd.setDaemon(false);
		deadManSwitchThrd.start();
		return deadManSwitch;
	}
	
}