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<?php
/**
* Event Sourcing implementation.
*
* @author Maksim Masiukevich <[email protected]>
* @license MIT
* @license https://opensource.org/licenses/MIT
*/
declare(strict_types = 1);
namespace ServiceBus\EventSourcing\Snapshots\Triggers;
use ServiceBus\EventSourcing\Aggregate;
use ServiceBus\EventSourcing\Snapshots\Snapshot;
* Generation of snapshots every N versions.
class SnapshotVersionTrigger implements SnapshotTrigger
{
private const DEFAULT_VERSION_STEP = 10;
* Version step interval.
* @var int
private $stepInterval;
* @param int $stepInterval
public function __construct($stepInterval = self::DEFAULT_VERSION_STEP)
$this->stepInterval = $stepInterval;
}
* {@inheritdoc}
public function snapshotMustBeCreated(Aggregate $aggregate, Snapshot $previousSnapshot = null): bool
if (null === $previousSnapshot)
return true;
return $this->stepInterval <= ($aggregate->version() - $previousSnapshot->version);
php-service-bus /
event-sourcing
