22.5.2. NotifyingFutures Example

FutureListener futureListener = new FutureListener() {

public void futureDone(Future future) {
      try {
         future.get();
      } catch (Exception e) {
         // Future did not complete successfully         
         System.out.println("Help!");
      }
   }
};
      
cache.putAsync("key", "value").attachListener(futureListener);