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