Line data    Source code

       1              : /*
       2              :  *   Famedly Matrix SDK
       3              :  *   Copyright (C) 2019, 2020, 2021 Famedly GmbH
       4              :  *
       5              :  *   This program is free software: you can redistribute it and/or modify
       6              :  *   it under the terms of the GNU Affero General Public License as
       7              :  *   published by the Free Software Foundation, either version 3 of the
       8              :  *   License, or (at your option) any later version.
       9              :  *
      10              :  *   This program is distributed in the hope that it will be useful,
      11              :  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
      12              :  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
      13              :  *   GNU Affero General Public License for more details.
      14              :  *
      15              :  *   You should have received a copy of the GNU Affero General Public License
      16              :  *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
      17              :  */
      18              : 
      19              : import 'package:async/async.dart';
      20              : 
      21              : extension AsyncCacheTryFetch<T> on AsyncCache<T> {
      22              :   /// Makes sure that in case of an error the error is not stored forever and
      23              :   /// blocking the cache but invalidates it.
      24            8 :   Future<T> tryFetch(Future<T> Function() callback) async {
      25              :     try {
      26            8 :       return await fetch(callback);
      27              :     } catch (_) {
      28            0 :       invalidate();
      29              :       rethrow;
      30              :     }
      31              :   }
      32              : }