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<?php
/**
* HTTP_Session2_Container_Memcache
*
* PHP Version 5
*
* @category HTTP
* @package HTTP_Session2
* @author Chad Wagner <chad.wagner@gmail.com>
* @author Torsten Roehr <torsten.roehr@gmx.de>
* @license http://www.opensource.org/licenses/bsd-license.php The BSD License
* @version CVS: $Id: Memcache.php 267740 2008-10-25 16:57:41Z till $
* @link http://pear.php.net/package/HTTP_Session2
*/
/**
* HTTP_Session2_Container
*/
require_once 'HTTP/Session2/Container.php';
/**
* HTTP_Session2_Exception
*/
require_once 'HTTP/Session2/Exception.php';
/**
* Memcache container for session data
*
* @category HTTP
* @package HTTP_Session2
* @author Chad Wagner <chad.wagner@gmail.com>
* @author Torsten Roehr <torsten.roehr@gmx.de>
* @license http://www.opensource.org/licenses/bsd-license.php The BSD License
* @version Release: @package_version@
* @link http://pear.php.net/package/HTTP_Session2
* @since 0.6.2
*/
class HTTP_Session2_Container_Memcache extends HTTP_Session2_Container
{
/**
* Memcache connection object
*
* @var object Memcache
*/
protected $mc;
/**
* Constructor method
*
* $options is an array with the options.<br>
* The options are:
* <ul>
* <li>'memcache' - Memcache object
* <li>'prefix' - Key prefix, default is 'sessiondata:'</li>
* </ul>
*
* @param array $options Options
*
* @return object
*/
public function __construct($options)
{
parent::__construct($options);
}
/**
* Connect using the given Memcache object.
*
* @param Memcache $mc A Memcache instance.
*
* @return boolean
* @throws HTTP_Session2_Exception
*/
protected function connect($mc)
{
if ($mc instanceof Memcache) {
$this->mc = $mc;
return true;
}
throw new HTTP_Session2_Exception(
'The given memcache object was not valid in file '
. __FILE__ . ' at line ' . __LINE__,
HTTP_Session2::ERR_SYSTEM_PRECONDITION);
}
/**
* Set some default options
*
* @return void
*/
protected function setDefaults()
{
$this->options['prefix'] = 'sessiondata:';
$this->options['memcache'] = null;
}
/**
* Establish connection to a database
*
* @param string $save_path Save path
* @param string $session_name Session name
*
* @return boolean
*/
public function open($save_path, $session_name)
{
return $this->connect($this->options['memcache']);
}
/**
* Free resources
*
* @return boolean
*/
public function close()
{
return true;
}
/**
* Read session data
*
* @param string $id Session id
*
* @return mixed
*/
public function read($id)
{
return $this->mc->get($this->options['prefix'] . $id);
}
/**
* Write session data
*
* @param string $id Session id
* @param mixed $data Session data
*
* @return boolean
*/
public function write($id, $data)
{
$this->mc->set($this->options['prefix'] . $id,
$data,
MEMCACHE_COMPRESSED,
time() + ini_get('session.gc_maxlifetime'));
return true;
}
/**
* Destroy session data
*
* @param string $id Session id
*
* @return boolean
*/
public function destroy($id)
{
$this->mc->delete($this->options['prefix'] . $id);
return true;
}
/**
* Garbage collection
*
* @param int $maxlifetime Maximum lifetime
*
* @return boolean
*/
public function gc($maxlifetime)
{
return true;
}
/**
* Replicate session data to specified target
*
* @param string $target Target to replicate to
* @param string $id Id of record to replicate,
* if not specified current session id will be used
*
* @return boolean
*/
public function replicate($target, $id = null)
{
$msg = 'The replicate feature is not available yet';
$msg .= ' for the Memcache container.';
throw new HTTP_Session2_Exception($msg, HTTP_Session2::ERR_NOT_IMPLEMENTED);
}
}