code: public void startUpload(long rid, String descriptor, String fileName, ActorRef requestActor) {
          if (LOG) {
              Log.d(TAG, "Starting upload #" + rid + " with descriptor " + descriptor);
          }
          QueueItem queueItem = new QueueItem(rid, descriptor, fileName, requestActor);
          queueItem.isStopped = false;
          queue.add(queueItem);
          checkQueue();
      }
docs: Tasks