3 * @copyright Copyright (C) 2010-2021, the Friendica project
5 * @license GNU AGPL version 3 or any later version
7 * This program is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU Affero General Public License as
9 * published by the Free Software Foundation, either version 3 of the
10 * License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU Affero General Public License for more details.
17 * You should have received a copy of the GNU Affero General Public License
18 * along with this program. If not, see <https://www.gnu.org/licenses/>.
22 namespace Friendica\Core\Cache\Type;
24 use Friendica\Core\Cache\Enum\Duration;
27 * Trait TraitCompareSetDelete
29 * This Trait is to compensate non native "exclusive" sets/deletes in caches
31 trait TraitCompareDelete
33 abstract public function get($key);
35 abstract public function set($key, $value, $ttl = Duration::FIVE_MINUTES);
37 abstract public function delete($key);
39 abstract public function add($key, $value, $ttl = Duration::FIVE_MINUTES);
42 * NonNative - Compares if the old value is set and removes it
44 * @param string $key The cache key
45 * @param mixed $value The old value we know and want to delete
48 public function compareDelete($key, $value) {
49 if ($this->add($key . "_lock", true)) {
50 if ($this->get($key) === $value) {
52 $this->delete($key . "_lock");
55 $this->delete($key . "_lock");