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<?php
namespace Drupal\Core\Update;
use Drupal\Core\Cache\CacheBackendInterface;
use Drupal\Core\Cache\NullBackend;
/**
* Defines a cache backend for use during Drupal database updates.
*
* Passes on deletes to another backend while extending the NullBackend to avoid
* using anything cached prior to running updates.
*/
class UpdateBackend extends NullBackend {
/**
* The regular runtime cache backend.
*
* @var \Drupal\Core\Cache\CacheBackendInterface
*/
protected $backend;
/**
* UpdateBackend constructor.
*
* @param \Drupal\Core\Cache\CacheBackendInterface $backend
* The regular runtime cache backend.
*/
public function __construct(CacheBackendInterface $backend) {
$this->backend = $backend;
}
/**
* {@inheritdoc}
*/
public function delete($cid) {
$this->backend->delete($cid);
}
/**
* {@inheritdoc}
*/
public function deleteMultiple(array $cids) {
$this->backend->deleteMultiple($cids);
}
/**
* {@inheritdoc}
*/
public function deleteAll() {
$this->backend->deleteAll();
}
}
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