public QueueInterface::releaseItem($item)

protected DatabaseQueue::doCreateItem($data) Adds

public Batch::getAllItems() Retrieves all remaining

public BatchMemory::getAllItems() Retrieves

The database connection. Type: \Drupal\Core\Database\Connection $connection File

Counter for item ids. Type: int File core/lib/Drupal/Core/Queue/Memory

public Memory::createQueue() Creates a queue

Static queue implementation. This allows "undelayed" variants of processes relying on the Queue interface. The queue data resides in memory

DatabaseQueue::__construct($name, Connection $connection)

The name of the queue this instance is working with. Type: string File