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<?php
/**
* Copyright (c) 2013 Robin Appelman <icewind@owncloud.com>
* This file is licensed under the Affero General Public License version 3 or
* later.
* See the COPYING-README file.
*/
namespace OC\Memcache;
abstract class Cache {
/**
* get a cache instance
*
* @param bool $global
* @return Cache
*/
static function create($global = false) {
if (XCache::isAvailable()) {
return new XCache($global);
} elseif (APC::isAvailable()) {
return new APC($global);
} elseif (Memcached::isAvailable()) {
return new Memcached($global);
} else {
return null;
}
}
/**
* @param bool $global
*/
abstract public function __construct($global);
/**
* @param string $key
* @return mixed
*/
abstract public function get($key);
/**
* @param string $key
* @param mixed $value
* @param int $ttl
* @return mixed
*/
abstract public function set($key, $value, $ttl = 0);
/**
* @param string $key
* @return mixed
*/
abstract public function hasKey($key);
/**
* @param string $key
* @return mixed
*/
abstract public function remove($key);
/**
* @param string $prefix
* @return mixed
*/
abstract public function clear($prefix = '');
/**
* @return bool
*/
static public function isAvailable() {
return XCache::isAvailable() || APC::isAvailable() || Memcached::isAvailable();
}
}
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