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<?php |
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/** |
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* This file is part of the Cubiche package. |
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* |
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* Copyright (c) Cubiche |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Cubiche\Domain\EventSourcing\Snapshot\Policy; |
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use Cubiche\Domain\EventSourcing\EventSourcedAggregateRootInterface; |
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use Cubiche\Domain\EventSourcing\Snapshot\Snapshot; |
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use Cubiche\Domain\EventSourcing\Snapshot\SnapshotStoreInterface; |
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use Cubiche\Domain\EventSourcing\Utils\NameResolver; |
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use Cubiche\Domain\Model\IdInterface; |
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/** |
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* TimeBasedSnapshottingPolicy class. |
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* |
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* @author Ivannis Suárez Jerez <[email protected]> |
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*/ |
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class TimeBasedSnapshottingPolicy implements SnapshottingPolicyInterface |
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{ |
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/** |
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* @var SnapshotStoreInterface |
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*/ |
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protected $snapshotStore; |
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/** |
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* @var string |
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*/ |
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protected $threshold; |
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/** |
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* @var string |
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*/ |
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protected $aggregateClassName; |
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/** |
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* TimeBasedSnapshottingPolicy constructor. |
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* |
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* @param SnapshotStoreInterface $snapshotStore |
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* @param string $aggregateClassName |
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* @param string $threshold |
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*/ |
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public function __construct(SnapshotStoreInterface $snapshotStore, $aggregateClassName, $threshold = '1 hour') |
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{ |
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$this->snapshotStore = $snapshotStore; |
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$this->threshold = $threshold; |
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$this->aggregateClassName = $aggregateClassName; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function shouldCreateSnapshot(EventSourcedAggregateRootInterface $eventSourcedAggregateRoot) |
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{ |
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$recordedEvents = $eventSourcedAggregateRoot->recordedEvents(); |
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if (count($recordedEvents) > 0) { |
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$lastSnapshot = $this->loadSnapshot($eventSourcedAggregateRoot->id()); |
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$threshold = new \DateTime(date('c', strtotime('-'.$this->threshold))); |
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if ($lastSnapshot !== null && $lastSnapshot->createdAt() < $threshold) { |
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return true; |
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} |
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} |
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return false; |
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} |
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/** |
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* Load a aggregate snapshot from the storage. |
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* |
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* @param IdInterface $id |
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* |
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* @return Snapshot|null |
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*/ |
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protected function loadSnapshot(IdInterface $id) |
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{ |
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return $this->snapshotStore->load($this->streamName($id)); |
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} |
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/** |
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* @return string |
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*/ |
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protected function streamName(IdInterface $id) |
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{ |
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return NameResolver::resolve($this->aggregateClassName, $id); |
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} |
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} |
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cubiche /
event-sourcing
