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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 : }