class BatchQueue

backdrop_class_list in core/includes/bootstrap.classes.inc

Lists all the classes used by Backdrop core.

_batch_populate_queue in core/includes/form.inc

Populates a job queue with the operations of a batch set.

class BatchQueue extends SystemQueue {

  /**
   * Overrides SystemQueue::claimItem().
   *
   * Unlike SystemQueue::claimItem(), this method provides a default lease
   * time of 0 (no expiration) instead of 30. This allows the item to be
   * claimed repeatedly until it is deleted.
   */
  public function claimItem($lease_time = 0) {
    $item = db_query_range('SELECT data, item_id FROM {queue} q WHERE name = :name ORDER BY item_id ASC', 0, 1, array(':name' => $this->name))->fetchObject();
    if ($item) {
      $item->data = unserialize($item->data);
      return $item;
    }
    return FALSE;
  }

  /**
   * Retrieves all remaining items in the queue.
   *
   * This is specific to Batch API and is not part of the BackdropQueueInterface.
   */
  public function getAllItems() {
    $result = array();
    $items = db_query('SELECT data FROM {queue} q WHERE name = :name ORDER BY item_id ASC', array(':name' => $this->name))->fetchAll();
    foreach ($items as $item) {
      $result[] = unserialize($item->data);
    }
    return $result;
  }
}