/usr/share/php/Horde/Cache/Storage/Memoryoverlay.php is in php-horde-cache 2.5.2-1build1.
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/**
* Copyright 2013-2016 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 2013-2016 Horde LLC
* @license http://www.horde.org/licenses/lgpl21 LGPL 2.1
* @link http://pear.horde.org/index.php?package=Cache
* @package Cache
*/
/**
* A memory overlay for a cache backend. Caches results in PHP memory for the
* current access so the underlying cache backend is not continually hit.
*
* @author Michael Slusarz <slusarz@horde.org>
* @category Horde
* @copyright 2013-2016 Horde LLC
* @deprecated Use Memory driver as first backend in stack driver instead.
* @license http://www.horde.org/licenses/lgpl21 LGPL 2.1
* @link http://pear.horde.org/index.php?package=Cache
* @package Cache
*/
class Horde_Cache_Storage_Memoryoverlay extends Horde_Cache_Storage_Base
{
/**
* The memory cache.
*
* @var array
*/
private $_cache = array();
/**
* Constructor.
*
* @param array $params Parameters:
* <pre>
* - backend: (Horde_Cache_Storage_Base) [REQUIRED] The master storage
* backend.
* </pre>
*/
public function __construct(array $params = array())
{
if (!isset($params['backend'])) {
throw new InvalidArgumentException('Missing backend parameter.');
}
parent::__construct($params);
}
/**
*/
public function get($key, $lifetime = 0)
{
if (!isset($this->_cache[$key])) {
$this->_cache[$key] = $this->_params['backend']->get($key, $lifetime);
}
return $this->_cache[$key];
}
/**
*/
public function set($key, $data, $lifetime = 0)
{
$this->_cache[$key] = $data;
$this->_params['backend']->set($key, $data, $lifetime);
}
/**
*/
public function exists($key, $lifetime = 0)
{
return isset($this->_cache[$key])
? true
: $this->_params['backend']->exists($key, $lifetime);
}
/**
*/
public function expire($key)
{
unset($this->_cache[$key]);
$this->_params['backend']->expire($key);
}
/**
*/
public function clear()
{
$this->_cache = array();
$this->_params['backend']->clear();
}
}
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