mirror of https://github.com/friendica/friendica
66 lines
1.9 KiB
PHP
66 lines
1.9 KiB
PHP
<?php
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/**
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* @copyright Copyright (C) 2010-2021, the Friendica project
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*
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* @license GNU AGPL version 3 or any later version
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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*/
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namespace Friendica\Core\Cache\Type;
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use Friendica\Core\Cache\Enum\Duration;
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/**
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* Trait TraitCompareSetDelete
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*
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* This Trait is to compensate non native "exclusive" sets/deletes in caches
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*/
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trait TraitCompareSet
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{
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abstract public function get($key);
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abstract public function set($key, $value, $ttl = Duration::FIVE_MINUTES);
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abstract public function delete($key);
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abstract public function add($key, $value, $ttl = Duration::FIVE_MINUTES);
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/**
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* NonNative - Compares if the old value is set and sets the new value
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*
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* @param string $key The cache key
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* @param mixed $oldValue The old value we know from the cache
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* @param mixed $newValue The new value we want to set
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* @param int $ttl The cache lifespan, must be one of the Cache constants
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*
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* @return bool
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*/
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public function compareSet($key, $oldValue, $newValue, $ttl = Duration::FIVE_MINUTES) {
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if ($this->add($key . "_lock", true)) {
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if ($this->get($key) === $oldValue) {
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$this->set($key, $newValue, $ttl);
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$this->delete($key . "_lock");
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return true;
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} else {
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$this->delete($key . "_lock");
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return false;
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}
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} else {
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return false;
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}
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}
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}
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