static <A> Iterable<A> iterateOverBlockingQueue(final LinkedBlockingQueue<A> q) {
  return new Iterable<A>() {
    public Iterator<A> iterator() {
      return new Iterator<A>() {
        A x;
        
        public boolean hasNext() ctex {
          while (x == null)
            x = q.poll(1, TimeUnit.DAYS);
          return true;
        }
        
        public A next() {
          hasNext();
          A _x = x;
          x = null;
          return _x;
        }
        
        public void remove() {
        }
      };
    }
  };
}