1 system.queue.inc public static BackdropQueue::get($name, $reliable = FALSE)

Returns the queue object for a given name.

The following can be set in settings.php through the $settings variable:

  • queue_class_$name: the class to be used for the queue $name.
  • queue_default_class: the class to use when queue_class_$name is not defined. Defaults to SystemQueue, a reliable backend using SQL.
  • queue_default_reliable_class: the class to use when queue_class_$name is not defined and the queue_default_class is not reliable. Defaults to SystemQueue.


$name: Arbitrary string. The name of the queue to work with.

$reliable: TRUE if the ordering of items and guaranteeing every item executes at least once is important, FALSE if scalability is the main concern.

Return value

BackdropQueueInterface: The queue object for a given name.


core/modules/system/system.queue.inc, line 79
Queue functionality.


Factory class for interacting with queues.


public static function get($name, $reliable = FALSE) {
  static $queues;
  if (!isset($queues[$name])) {
    $class = settings_get('queue_class_' . $name, NULL);
    if (!$class) {
      $class = settings_get('queue_default_class', 'SystemQueue');
    $object = new $class($name);
    if ($reliable && !$object instanceof BackdropReliableQueueInterface) {
      $class = settings_get('queue_default_reliable_class', 'SystemQueue');
      $object = new $class($name);
    $queues[$name] = $object;
  return $queues[$name];