/**
* Транзакция с локированием добываемого ресурса
* @param EntityManager $em
* @param int $resourceId
* @param UserService $userService
* @return void
* @throws \Doctrine\DBAL\ConnectionException
* @throws \Exception
*/
private function reduceQuantity(EntityManager $em, int $resourceId, UserService $userService)
{
$em->getConnection()->beginTransaction();
try {
/** @var RoomResource $resourceToUpdate */
$resourceToUpdate = $em->find(RoomResource::class, $resourceId, LockMode::PESSIMISTIC_READ);
$resourceToUpdate->reduceQuantity($this->quantityToObtain);
$userService->takeItems($this->user, $resourceToUpdate->getItem(), $this->quantityToObtain);
$em->persist($resourceToUpdate);
$em->flush();
$em->getConnection()->commit();
} catch (\Exception $e) {
$em->getConnection()->rollback();
throw $e;
}
}
