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<?php
/* SVN FILE: $Id: memcache.php 7118 2008-06-04 20:49:29Z gwoo $ */
/**
* Memcache storage engine for cache
*
*
* PHP versions 4 and 5
*
* CakePHP(tm) : Rapid Development Framework <http://www.cakephp.org/>
* Copyright 2005-2008, Cake Software Foundation, Inc.
* 1785 E. Sahara Avenue, Suite 490-204
* Las Vegas, Nevada 89104
*
* Licensed under The MIT License
* Redistributions of files must retain the above copyright notice.
*
* @filesource
* @copyright Copyright 2005-2008, Cake Software Foundation, Inc.
* @link http://www.cakefoundation.org/projects/info/cakephp CakePHP(tm) Project
* @package cake
* @subpackage cake.cake.libs.cache
* @since CakePHP(tm) v 1.2.0.4933
* @version $Revision: 7118 $
* @modifiedby $LastChangedBy: gwoo $
* @lastmodified $Date: 2008-06-04 13:49:29 -0700 (Wed, 04 Jun 2008) $
* @license http://www.opensource.org/licenses/mit-license.php The MIT License
*/
/**
* Memcache storage engine for cache
*
* @package cake
* @subpackage cake.cake.libs.cache
*/
class MemcacheEngine extends CacheEngine {
/**
* Memcache wrapper.
*
* @var object
* @access private
*/
var $__Memcache = null;
/**
* settings
* servers = string or array of memcache servers, default => 127.0.0.1
* compress = boolean, default => false
*
* @var array
* @access public
*/
var $settings = array();
/**
* Initialize the Cache Engine
*
* Called automatically by the cache frontend
* To reinitialize the settings call Cache::engine('EngineName', [optional] settings = array());
*
* @param array $setting array of setting for the engine
* @return boolean True if the engine has been successfully initialized, false if not
* @access public
*/
function init($settings = array()) {
if (!class_exists('Memcache')) {
return false;
}
parent::init(array_merge(array(
'engine'=> 'Memcache', 'prefix' => Inflector::slug(APP_DIR) . '_', 'servers' => array('127.0.0.1'), 'compress'=> false
), $settings)
);
if ($this->settings['compress']) {
$this->settings['compress'] = MEMCACHE_COMPRESSED;
}
if (!is_array($this->settings['servers'])) {
$this->settings['servers'] = array($this->settings['servers']);
}
$this->__Memcache =& new Memcache();
foreach ($this->settings['servers'] as $server) {
$parts = explode(':', $server);
$host = $parts[0];
$port = 11211;
if (isset($parts[1])) {
$port = $parts[1];
}
if ($this->__Memcache->addServer($host, $port)) {
if ($this->__Memcache->connect($host, $port)) {
return true;
}
}
}
return false;
}
/**
* Write data for key into cache
*
* @param string $key Identifier for the data
* @param mixed $value Data to be cached
* @param integer $duration How long to cache the data, in seconds
* @return boolean True if the data was succesfully cached, false on failure
* @access public
*/
function write($key, &$value, $duration) {
return $this->__Memcache->set($key, $value, $this->settings['compress'], $duration);
}
/**
* Read a key from the cache
*
* @param string $key Identifier for the data
* @return mixed The cached data, or false if the data doesn't exist, has expired, or if there was an error fetching it
* @access public
*/
function read($key) {
return $this->__Memcache->get($key);
}
/**
* Delete a key from the cache
*
* @param string $key Identifier for the data
* @return boolean True if the value was succesfully deleted, false if it didn't exist or couldn't be removed
* @access public
*/
function delete($key) {
return $this->__Memcache->delete($key);
}
/**
* Delete all keys from the cache
*
* @return boolean True if the cache was succesfully cleared, false otherwise
* @access public
*/
function clear() {
return $this->__Memcache->flush();
}
/**
* Connects to a server in connection pool
*
* @param string $host host ip address or name
* @param integer $port Server port
* @return boolean True if memcache server was connected
* @access public
*/
function connect($host, $port = 11211) {
if ($this->__Memcache->getServerStatus($host, $port) === 0) {
if ($this->__Memcache->connect($host, $port)) {
return true;
}
return false;
}
return true;
}
}
?>
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