/**
* 重写父类方法
*
* @param string $idx
* @return Oray_Balancer_Rotation
*/
public function setCurrent($idx)
{
parent::setCurrent($idx);
$item = reset($this->_items);
do {
if (key($this->_items) === $idx) {
break;
}
} while (false !== ($item = next($this->_items)));
return $this;
}
