public void watchForUpdates(){
  Preconditions.checkState(client != null,"You need to call init() before watchForUpdates().");
  running=true;
  executorService.submit(null);
}

public void watchForUpdates ( ) { Preconditions . checkState ( client != null , "You need to call init() before watchForUpdates()." ) ; running = true ; executorService . submit ( null ) ; }
kicks off a separate thread that will keep flag values in sync with etcd .
