public function startCodeReview($id)
{
$this->view = null;
/**
* Avoid Code Review races issues by opening a shared block
* memory globally exclusive by using the job id as key.
*/
do {
// inmediatly after first parallel reviewer has run this shmop_open line
$sem_id = shmop_open($workitem_id, "n", 0644, 1);
} while ($sem_id === false);
// parallel attempts need to hang until shmop_delete is called
try {
$workitem = new WorkItem($id);
$user = User::find(Session::uid());
if (!$user->isEligible() || $userId == $workitem->getMechanicId()) {
throw new Exception('Action not allowed');
}
$status = $workitem->startCodeReview($user->getId());
if ($status === null) {
throw new Exception('Code Review not available right now');
} else {
if ($status === true || (int) $status == 0) {
$journal_message = '@' . $user->getNickname() . ' has started a code review for #' . $id . ' ';
Utils::systemNotification($journal_message);
Notification::workitemNotifyHipchat(array('type' => 'code-review-started', 'workitem' => $workitem), array('nick' => $user->getNickname()));
echo json_encode(array('success' => true, 'message' => $journal_message, 'codeReviewStarted' => true, 'codeReviewFeeAmount' => $this->getCRFee($workitem)));
}
}
} catch (Exception $e) {
echo json_encode(array('success' => false, 'message' => $e->getMessage()));
}
// running this line means that parallel request is freed from the shmop_open while
shmop_delete($sem_id);
}
