/**
* This method will be invoked, after the while() loop has been finished and
* can be used to implement clean up functionality.
*
* @return void
*/
public function cleanUp()
{
// create a separate queue for each priority
foreach (PriorityKeys::getAll() as $priorityKey) {
$this->workers[$this->uniqueWorkerName($priorityKey)]->stop();
}
}
