public static function create()
{
if (self::$instance === null) {
self::$instance = new self();
}
return self::$instance;
}
public static function create($backend = "")
{
if (empty($backend) && empty(self::$defaultBackend)) {
$message = __METHOD__ . "() must specify the backend.";
throw new Sabel_Exception_Runtime($message);
}
if ((ENVIRONMENT & PRODUCTION) < 1) {
return Sabel_Cache_Null::create();
}
if (empty($backend)) {
$backend = self::$defaultBackend;
}
switch ($backend) {
case "file":
$storage = Sabel_Cache_File::create(CACHE_DIR_PATH . DS . "data");
break;
case "apc":
$storage = Sabel_Cache_Apc::create();
break;
case "memcache":
$storage = Sabel_Cache_Memcache::create();
// $storage->addServer(/* $host, $port = 11211, $weight = 1 */);
break;
default:
$message = __METHOD__ . "() invalid cache backend.";
throw new Sabel_Exception_Runtime($message);
}
return $storage;
}
public static function getUsableCache()
{
self::init();
$instance = null;
if (!defined("ENVIRONMENT") || ENVIRONMENT !== PRODUCTION) {
$instance = Sabel_Cache_Null::create();
} elseif (self::$support["apc"]) {
$instance = Sabel_Cache_Apc::create();
} elseif (self::$support["memcache"]) {
$instance = Sabel_Cache_Memcache::create();
} else {
$instance = Sabel_Cache_File::create();
}
return $instance;
}
public function setUp()
{
$this->cache = Sabel_Cache_Null::create();
}