85 lines
2.0 KiB
PHP
85 lines
2.0 KiB
PHP
<?php
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/**
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* Copyright (c) 2012 Bart Visscher <bartv@thisnet.nl>
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* This file is licensed under the Affero General Public License version 3 or
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* later.
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* See the COPYING-README file.
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*/
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namespace OC\Memcache;
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class Memcached extends Cache {
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/**
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* @var \Memcached $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::$cache = new \Memcached();
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$servers = \OC_Config::getValue('memcached_servers');
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if (!$servers) {
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$server = \OC_Config::getValue('memcached_server');
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if ($server) {
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$servers = array($server);
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} else {
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$servers = array(array('localhost', 11211));
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}
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}
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self::$cache->addServers($servers);
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}
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}
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/**
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* entries in XCache gets 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 and self::$cache->getResultCode() == \Memcached::RES_NOTFOUND) {
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return null;
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} else {
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return $result;
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}
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}
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public function set($key, $value, $ttl = 0) {
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if ($ttl > 0) {
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return self::$cache->set($this->getNamespace() . $key, $value, $ttl);
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} else {
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return self::$cache->set($this->getNamespace() . $key, $value);
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}
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}
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public function hasKey($key) {
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self::$cache->get($this->getNamespace() . $key);
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return self::$cache->getResultCode() !== \Memcached::RES_NOTFOUND;
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}
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public function remove($key) {
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return self::$cache->delete($this->getNamespace() . $key);
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}
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public function clear($prefix = '') {
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$prefix = $this->getNamespace() . $prefix;
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$allKeys = self::$cache->getAllKeys();
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$keys = array();
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$prefixLength = strlen($prefix);
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foreach ($allKeys as $key) {
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if (substr($key, 0, $prefixLength) === $prefix) {
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$keys[] = $key;
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}
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}
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self::$cache->deleteMulti($keys);
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return true;
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}
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static public function isAvailable() {
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return extension_loaded('memcached');
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}
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}
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