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<?php
namespace Drupal\Core\Queue;
/**
* Defines a batch queue handler used by the Batch API.
*
* This implementation:
* - Ensures FIFO ordering.
* - Allows an item to be repeatedly claimed until it is actually deleted (no
* notion of lease time or 'expire' date), to allow multipass operations.
*
* Stale items from failed batches are cleaned from the {queue} table on cron
* using the 'created' date.
*
* @ingroup queue
*/
class Batch extends DatabaseQueue {
/**
* Overrides \Drupal\Core\Queue\DatabaseQueue::claimItem().
*
* Unlike \Drupal\Core\Queue\DatabaseQueue::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) {
try {
$item = $this->connection->queryRange('SELECT data, item_id FROM {queue} q WHERE name = :name ORDER BY item_id ASC', 0, 1, [':name' => $this->name])->fetchObject();
if ($item) {
$item->data = unserialize($item->data);
return $item;
}
}
catch (\Exception $e) {
$this->catchException($e);
}
return FALSE;
}
/**
* Retrieves all remaining items in the queue.
*
* This is specific to Batch API and is not part of the
* \Drupal\Core\Queue\QueueInterface.
*
* @return array
* An array of queue items.
*/
public function getAllItems() {
$result = [];
try {
$items = $this->connection->query('SELECT data FROM {queue} q WHERE name = :name ORDER BY item_id ASC', [':name' => $this->name])->fetchAll();
foreach ($items as $item) {
$result[] = unserialize($item->data);
}
}
catch (\Exception $e) {
$this->catchException($e);
}
return $result;
}
}