public function getItems(array $keys = array())
{
if (empty($keys)) {
return array();
}
$found = array_intersect_key(self::$pool, $keys);
$find = array_diff($keys, array_keys($found));
$res = CacheItem::find($find);
if (!empty($res)) {
self::$pool = array_merge(self::$pool, $res);
}
return array_intersect_key(self::$pool, $keys);
}
