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;
25 * Trait TraitCompareSetDelete
27 * This Trait is to compensate non native "exclusive" sets/deletes in caches
31 abstract public function get($key);
33 abstract public function set($key, $value, $ttl = Duration::FIVE_MINUTES);
35 abstract public function delete($key);
37 abstract public function add($key, $value, $ttl = Duration::FIVE_MINUTES);
40 * NonNative - Compares if the old value is set and sets the new value
42 * @param string $key The cache key
43 * @param mixed $oldValue The old value we know from the cache
44 * @param mixed $newValue The new value we want to set
45 * @param int $ttl The cache lifespan, must be one of the Cache constants
49 public function compareSet($key, $oldValue, $newValue, $ttl = Duration::FIVE_MINUTES) {
50 if ($this->add($key . "_lock", true)) {
51 if ($this->get($key) === $oldValue) {
52 $this->set($key, $newValue, $ttl);
53 $this->delete($key . "_lock");
56 $this->delete($key . "_lock");