TIMEOUT

public abstract class Timeout {
	private class TimeoutThread implements Runnable {
		public void run() {
			Object res = command();
			synchronized (Timeout.this) {
				if (timedOut && res != null) {
				} else {
					result = res;
					Timeout.this.notify();
				}
			}
		}
	}
    
	private boolean timedOut = false;
	private Object result = null;
	protected Timeout() {}    
    
	public synchronized Object execute(int timeout) throws Exception {       
		new Thread(new TimeoutThread()).start();
              
		try {
			this.wait(timeout);
		} catch (InterruptedException e) {
			if (result == null) {
				timedOut = true;
			}else{
				commandTimeOut(result);
			}
			throw new Exception("timed out");
		}

		if (result != null) {
			return result;
		} else {
			timedOut = true;
			throw new Exception("timed out");
		}
	}
	
	/**
	 * Command si on a un resultat ok mais que le timeout est eteind
	 * @param result
	 */
	protected abstract void commandTimeOut(Object result);
	/**
	 * Command a executer
	 * @return
	 */
	protected abstract Object command();

}