/usr/share/php/Horde/Cache/Storage/Memcache.php is in php-horde-cache 2.5.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/**
* Copyright 2006-2014 Horde LLC (http://www.horde.org/)
*
* See the enclosed file COPYING for license information (LGPL). If you
* did not receive this file, see http://www.horde.org/licenses/lgpl21.
*
* @category Horde
* @copyright 2006-2014 Horde LLC
* @license http://www.horde.org/licenses/lgpl21 LGPL 2.1
* @package Cache
*/
/**
* Cache storage on a memcache installation.
*
* @author Duck <duck@obala.net>
* @author Michael Slusarz <slusarz@horde.org>
* @category Horde
* @copyright 2006-2014 Horde LLC
* @deprecated Use HashTable driver instead.
* @license http://www.horde.org/licenses/lgpl21 LGPL 2.1
* @package Cache
*/
class Horde_Cache_Storage_Memcache extends Horde_Cache_Storage_Base
{
/**
* Cache results of expire() calls (since we will get the entire object
* on an expire() call anyway).
*
* @var array
*/
protected $_expirecache = array();
/**
* Memcache object.
*
* @var Horde_Memcache
*/
protected $_memcache;
/**
* Construct a new Horde_Cache_Memcache object.
*
* @param array $params Parameter array:
* <pre>
* - memcache: (Horde_Memcache) [REQUIRED] A Horde_Memcache object.
* - prefix: (string) The prefix to use for the cache keys.
* DEFAULT: ''
* </pre>
*/
public function __construct(array $params = array())
{
if (!isset($params['memcache'])) {
if (isset($params['hashtable'])) {
$params['memcache'] = $params['hashtable'];
} else {
throw new InvalidArgumentException('Missing memcache object');
}
}
parent::__construct(array_merge(array(
'prefix' => '',
), $params));
}
/**
*/
protected function _initOb()
{
$this->_memcache = $this->_params['memcache'];
}
/**
*/
public function get($key, $lifetime = 0)
{
$original_key = $key;
$key = $this->_params['prefix'] . $key;
if (isset($this->_expirecache[$key])) {
return $this->_expirecache[$key];
}
$key_list = array($key);
if (!empty($lifetime)) {
$key_list[] = $key . '_e';
}
$res = $this->_memcache->get($key_list);
if ($res === false) {
unset($this->_expirecache[$key]);
} else {
// If we can't find the expire time, assume we have exceeded it.
if (empty($lifetime) ||
(($res[$key . '_e'] !== false) && ($res[$key . '_e'] + $lifetime > time()))) {
$this->_expirecache[$key] = $res[$key];
} else {
$res[$key] = false;
$this->expire($original_key);
}
}
return $res[$key];
}
/**
*/
public function set($key, $data, $lifetime = 0)
{
$key = $this->_params['prefix'] . $key;
if ($this->_memcache->set($key . '_e', time(), $lifetime) !== false) {
$this->_memcache->set($key, $data, $lifetime);
}
}
/**
*/
public function exists($key, $lifetime = 0)
{
return ($this->get($key, $lifetime) !== false);
}
/**
*/
public function expire($key)
{
$key = $this->_params['prefix'] . $key;
unset($this->_expirecache[$key]);
$this->_memcache->delete($key . '_e');
return $this->_memcache->delete($key);
}
/**
*/
public function clear()
{
$this->_memcache->flush();
}
}
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