public function getNumHolds($id)
{
/** @var Memcache $memCache */
global $memCache;
$key = 'num_holds_' . $id;
$cachedValue = $memCache->get($key);
if ($cachedValue == false || isset($_REQUEST['reload'])) {
$cachedValue = $this->driver->getNumHolds($id);
global $configArray;
$memCache->add($key, $cachedValue, 0, $configArray['Caching']['item_data']);
}
return $cachedValue;
}