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181 lines
4.4 KiB
181 lines
4.4 KiB
<?php |
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/** |
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* @copyright Copyright (c) 2016, ownCloud, Inc. |
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* |
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* @author Joas Schilling <coding@schilljs.com> |
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* @author Jörn Friedrich Dreyer <jfd@butonic.de> |
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* @author Morris Jobke <hey@morrisjobke.de> |
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* @author Robin Appelman <robin@icewind.nl> |
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* @author Robin McCorkell <robin@mccorkell.me.uk> |
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* @author Roeland Jago Douma <roeland@famdouma.nl> |
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* @author Stefan Weil <sw@weilnetz.de> |
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* |
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* @license AGPL-3.0 |
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* |
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* This code 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, version 3, |
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* as published by the Free Software Foundation. |
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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, version 3, |
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* along with this program. If not, see <http://www.gnu.org/licenses/> |
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* |
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*/ |
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namespace OC\Memcache; |
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use OCP\IMemcacheTTL; |
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class Redis extends Cache implements IMemcacheTTL { |
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/** |
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* @var \Redis $cache |
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*/ |
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private static $cache = null; |
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public function __construct($prefix = '') { |
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parent::__construct($prefix); |
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if (is_null(self::$cache)) { |
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self::$cache = \OC::$server->getGetRedisFactory()->getInstance(); |
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} |
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} |
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/** |
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* entries in redis get namespaced to prevent collisions between ownCloud instances and users |
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*/ |
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protected function getNameSpace() { |
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return $this->prefix; |
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} |
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public function get($key) { |
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$result = self::$cache->get($this->getNameSpace() . $key); |
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if ($result === false && !self::$cache->exists($this->getNameSpace() . $key)) { |
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return null; |
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} else { |
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return json_decode($result, true); |
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} |
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} |
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public function set($key, $value, $ttl = 0) { |
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if ($ttl > 0) { |
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return self::$cache->setex($this->getNameSpace() . $key, $ttl, json_encode($value)); |
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} else { |
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return self::$cache->set($this->getNameSpace() . $key, json_encode($value)); |
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} |
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} |
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public function hasKey($key) { |
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return self::$cache->exists($this->getNameSpace() . $key); |
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} |
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public function remove($key) { |
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if (self::$cache->del($this->getNameSpace() . $key)) { |
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return true; |
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} else { |
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return false; |
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} |
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} |
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public function clear($prefix = '') { |
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$prefix = $this->getNameSpace() . $prefix . '*'; |
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$keys = self::$cache->keys($prefix); |
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$deleted = self::$cache->del($keys); |
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return count($keys) === $deleted; |
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} |
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/** |
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* Set a value in the cache if it's not already stored |
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* |
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* @param string $key |
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* @param mixed $value |
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* @param int $ttl Time To Live in seconds. Defaults to 60*60*24 |
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* @return bool |
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*/ |
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public function add($key, $value, $ttl = 0) { |
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// don't encode ints for inc/dec |
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if (!is_int($value)) { |
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$value = json_encode($value); |
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} |
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return self::$cache->setnx($this->getPrefix() . $key, $value); |
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} |
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/** |
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* Increase a stored number |
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* |
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* @param string $key |
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* @param int $step |
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* @return int | bool |
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*/ |
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public function inc($key, $step = 1) { |
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return self::$cache->incrBy($this->getNameSpace() . $key, $step); |
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} |
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/** |
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* Decrease a stored number |
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* |
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* @param string $key |
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* @param int $step |
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* @return int | bool |
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*/ |
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public function dec($key, $step = 1) { |
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if (!$this->hasKey($key)) { |
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return false; |
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} |
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return self::$cache->decrBy($this->getNameSpace() . $key, $step); |
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} |
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/** |
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* Compare and set |
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* |
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* @param string $key |
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* @param mixed $old |
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* @param mixed $new |
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* @return bool |
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*/ |
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public function cas($key, $old, $new) { |
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if (!is_int($new)) { |
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$new = json_encode($new); |
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} |
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self::$cache->watch($this->getNameSpace() . $key); |
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if ($this->get($key) === $old) { |
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$result = self::$cache->multi() |
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->set($this->getNameSpace() . $key, $new) |
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->exec(); |
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return $result !== false; |
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} |
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self::$cache->unwatch(); |
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return false; |
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} |
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/** |
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* Compare and delete |
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* |
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* @param string $key |
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* @param mixed $old |
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* @return bool |
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*/ |
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public function cad($key, $old) { |
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self::$cache->watch($this->getNameSpace() . $key); |
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if ($this->get($key) === $old) { |
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$result = self::$cache->multi() |
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->del($this->getNameSpace() . $key) |
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->exec(); |
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return $result !== false; |
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} |
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self::$cache->unwatch(); |
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return false; |
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} |
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public function setTTL($key, $ttl) { |
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self::$cache->expire($this->getNameSpace() . $key, $ttl); |
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} |
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static public function isAvailable() { |
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return \OC::$server->getGetRedisFactory()->isAvailable(); |
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} |
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} |
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