Queue Unique

Did you ever want a queue that only accepts unique items? This module provides a way of doing that. If you try to insert a duplicated item in the queue, the item is ignored.

// $data can be anything.
$data = ['Lorem', 'ipsum'];

$queue_name = 'your_queue_name';
$queue = \Drupal::service('queue')->get($queue_name);
$queue->createItem($data);
// This will insert a duplicate, and will return FALSE.
if ($queue->createItem($data) === FALSE) {
  // The item was a duplicate, respond appropriately.
}

Usage

In order for your queue to use the Queue Unique you need to update your settings.php file:

$settings['queue_service_your_queue_name'] = 'queue_unique.database';