friendica/src/Core/Cache/TraitCompareDelete.php
2020-02-09 15:45:36 +01:00

61 lines
1.7 KiB
PHP

<?php
/**
* @copyright Copyright (C) 2020, Friendica
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
namespace Friendica\Core\Cache;
/**
* Trait TraitCompareSetDelete
*
* This Trait is to compensate non native "exclusive" sets/deletes in caches
*/
trait TraitCompareDelete
{
abstract public function get($key);
abstract public function set($key, $value, $ttl = Duration::FIVE_MINUTES);
abstract public function delete($key);
abstract public function add($key, $value, $ttl = Duration::FIVE_MINUTES);
/**
* NonNative - Compares if the old value is set and removes it
*
* @param string $key The cache key
* @param mixed $value The old value we know and want to delete
* @return bool
*/
public function compareDelete($key, $value) {
if ($this->add($key . "_lock", true)) {
if ($this->get($key) === $value) {
$this->delete($key);
$this->delete($key . "_lock");
return true;
} else {
$this->delete($key . "_lock");
return false;
}
} else {
return false;
}
}
}