public class SectorListInteractor {
    interface onLoadFinishedListener {
        void onSuccess(ArrayList<Sector> sectorList);

        void onFailure(int idError);
    }

    public SectorListInteractor.onLoadFinishedListener listener;

    public SectorListInteractor(SectorListInteractor.onLoadFinishedListener listener) {
        this.listener = listener;
    }

    public void loadSectors() {
        new AsyncTask<Void, Void, ArrayList<Sector>>() {

            @Override
            protected ArrayList<Sector> doInBackground(Void... voids) {
                try {

                    Thread.sleep(3000); // pa na
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                return SectorRepository.getInstance().getAll();
            }

            @Override
            protected void onPostExecute(ArrayList<Sector> sectorArrayList) {
                listener.onSuccess(sectorArrayList);
            }
        }.execute();
    }
}