List<CNSSubscription> confirmedSubscriptions = new ArrayList<CNSSubscription>();
ICNSSubscriptionPersistence subscriptionHandler = new CNSSubscriptionCassandraPersistence();
while (round == 0 || nextToken != null) {
List<CNSSubscription> subscriptions = subscriptionHandler.listAllSubscriptionsByTopic(nextToken, topicArn, protocol);
if (subscriptions.size() > 0) {
nextToken = subscriptions.get(subscriptions.size()-1).getArn();
} else {
nextToken = null;