String topicName = "T" + rand.nextLong();
String userId1 = user1.getUserId();
String userId2 = user2.getUserId();
CNSTopic t = topicHandler.createTopic(topicName, topicName, userId2);
topicArn = t.getArn();
ICNSSubscriptionPersistence subscriptionHandler = new CNSSubscriptionCassandraPersistence();
subscriptionHandler.subscribe(CMBTestingConstants.HTTP_ENDPOINT_BASE_URL + "recv/1234", CnsSubscriptionProtocol.http, t.getArn(), userId1);