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8baed187 Michal Kliment
<?php defined('SYSPATH') or die('No direct script access.');
/**
* Xcache Cache driver.
*
* @package Cache:Xcache
* @author Kohana Team
* @copyright (c) 2007-2008 Kohana Team
* @license http://kohanaphp.com/license.html
*/
class Cache_Xcache_Driver implements Cache_Driver {

public function __construct()
{
if ( ! extension_loaded('xcache'))
throw new Kohana_Exception('cache.extension_not_loaded', 'xcache');
}

public function get($id)
{
if (xcache_isset($id))
return xcache_get($id);

return FALSE;
}

public function set($id, $data, $tags, $expiration)
{
count($tags) and Log::add('error', 'Cache: tags are unsupported by the Xcache driver');

return xcache_set($id, $data, $expiration);
}

public function find($tag)
{
Log::add('error', 'Cache: tags are unsupported by the Xcache driver');
return FALSE;
}

public function delete($id, $tag = FALSE)
{
if ($id === TRUE)
{
Log::add('error', 'Cache: tags are unsupported by the Xcache driver');
return TRUE;
}
elseif ($tag == FALSE)
{
// Do the login
$this->auth();

$result = TRUE;
for($i = 0, $max = xcache_count(XC_TYPE_VAR); $i < $max; $i++)
{
if ( ! xcache_clear_cache(XC_TYPE_VAR, $i))
{
$result = FALSE;
break;
}
}

// Undo the login
$this->auth(TRUE);
return $result;
}
else
{
return TRUE;
}
}

public function delete_expired()
{
return TRUE;
}

private function auth($reverse = FALSE)
{
static $backup = array();

$keys = array('PHP_AUTH_USER', 'PHP_AUTH_PW');

foreach ($keys as $key)
{
if ($reverse)
{
if (isset($backup[$key]))
{
$_SERVER[$key] = $backup[$key];
unset($backup[$key]);
}
else
{
unset($_SERVER[$key]);
}
}
else
{
$value = getenv($key);

if ( ! empty($value))
{
$backup[$key] = $value;
}

$_SERVER[$key] = Config::item('cache_xcache.__'.$key);
}
}
}

} // End Cache Xcache Driver