public function DatabaseQueue::numberOfItems in Drupal 8

Same name and namespace in other branches

1. 9 core/lib/Drupal/Core/Queue/DatabaseQueue.php \Drupal\Core\Queue\DatabaseQueue::numberOfItems()
2. 10 core/lib/Drupal/Core/Queue/DatabaseQueue.php \Drupal\Core\Queue\DatabaseQueue::numberOfItems()

Retrieves the number of items in the queue.

This is intended to provide a "best guess" count of the number of items in the queue. Depending on the implementation and the setup, the accuracy of the results of this function may vary.

e.g. On a busy system with a large number of consumers and items, the result might only be valid for a fraction of a second and not provide an accurate representation.

Return value

int An integer estimate of the number of items in the queue.

Overrides QueueInterface::numberOfItems

File

core/lib/Drupal/Core/Queue/DatabaseQueue.php, line 101

Class

DatabaseQueue

Default queue implementation.

Namespace

Drupal\Core\Queue

Code

public function numberOfItems() {
  try {
    return (int) $this->connection
      ->query('SELECT COUNT(item_id) FROM {' . static::TABLE_NAME . '} WHERE name = :name', [
      ':name' => $this->name,
    ])
      ->fetchField();
  } catch (\Exception $e) {
    $this
      ->catchException($e);

    // If there is no table there cannot be any items.
    return 0;
  }
}