public function __construct()
 {
     $this->bucket = Conf::fromCache('OSS_BUCKET') ? Conf::fromCache('OSS_BUCKET') : '';
     $this->domain = Conf::fromCache('OSS_ACCESS_URI') ? Conf::fromCache('OSS_ACCESS_URI') : '';
     //拼接文件返回地址的 http host部分
     $hostname = Conf::fromCache('OSS_HOST') ? Conf::fromCache('OSS_HOST') : '';
     //定义操作的指定节点hostname
     $OSS_ACCESS_ID = Conf::fromCache('OSS_ACCESS_KEY_ID') ? Conf::fromCache('OSS_ACCESS_KEY_ID') : '';
     $OSS_ACCESS_KEY = Conf::fromCache('OSS_ACCESS_KEY_SECRET') ? Conf::fromCache('OSS_ACCESS_KEY_SECRET') : '';
     $this->oss = new \ALIOSS($OSS_ACCESS_ID, $OSS_ACCESS_KEY, $hostname);
 }
 /**
  * 初始化参数 
  * @example 
  *  new \yunke\upload\Oss('sales');
  * @param array|string $config
  */
 public function init()
 {
     parent::init();
     $this->bucket = Conf::fromCache('OSS_BUCKET') ? Conf::fromCache('OSS_BUCKET') : '';
     $this->domain = Conf::fromCache('OSS_ACCESS_URI') ? Conf::fromCache('OSS_ACCESS_URI') : '';
     //拼接文件返回地址的 http host部分
     $hostname = Conf::fromCache('OSS_HOST') ? Conf::fromCache('OSS_HOST') : '';
     //定义操作的指定节点hostname
     $OSS_ACCESS_ID = Conf::fromCache('OSS_ACCESS_KEY_ID') ? Conf::fromCache('OSS_ACCESS_KEY_ID') : '';
     $OSS_ACCESS_KEY = Conf::fromCache('OSS_ACCESS_KEY_SECRET') ? Conf::fromCache('OSS_ACCESS_KEY_SECRET') : '';
     if ($this->rootDirName) {
         $this->root = $this->rootDirName;
     }
     $this->oss = new \ALIOSS($OSS_ACCESS_ID, $OSS_ACCESS_KEY, $hostname);
 }
 /**
  * Returns the underlying  memcached object.
  * @return \Memcached the  memcached object used by this cache component.
  * @throws InvalidConfigException if memcached extension is not loaded
  */
 public function getMemcached()
 {
     if ($this->_cache === null) {
         if (!extension_loaded('memcached')) {
             throw new InvalidConfigException("MemCache requires PHP  extension to be loaded.");
         }
         $global = \yunke\helpers\Conf::fromLocal();
         //获取配置
         $this->options = array('host' => $global['OCS_HOST'] ? $global['OCS_HOST'] : '127.0.0.1', 'port' => $global['OCS_PORT'] ? $global['OCS_PORT'] : 11211, 'user' => $global['OCS_SASL_USER'] ? $global['OCS_SASL_USER'] : '', 'passwd' => $global['OCS_SASL_PWD'] ? $global['OCS_SASL_PWD'] : '');
         $this->_cache = $this->persistentId !== null ? new \Memcached($this->persistentId) : new \Memcached();
         $this->_cache->setOption(\Memcached::OPT_COMPRESSION, false);
         $this->_cache->setOption(\Memcached::OPT_BINARY_PROTOCOL, true);
         $this->_cache->addServer($this->options['host'], $this->options['port']);
         /* 
         if ( !empty($this->options['user']) && !empty($this->options['passwd']) ) {
         	$this->_cache->setOption(\Memcached::OPT_BINARY_PROTOCOL, true);
         	$this->_cache->setSaslAuthData($this->options['user'], $this->options['passwd']);
         }
         */
     }
     return $this->_cache;
 }