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<?php |
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declare(strict_types=1); |
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namespace EventSauce\EventSourcing\Snapshotting; |
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use EventSauce\EventSourcing\AggregateRootId; |
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use EventSauce\EventSourcing\AggregateRootRepository; |
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use EventSauce\EventSourcing\Message; |
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use EventSauce\EventSourcing\MessageRepository; |
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use Generator; |
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final class ConstructingAggregateRootRepositoryWithSnapshotting implements AggregateRootRepositoryWithSnapshotting |
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{ |
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/** |
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* @var string |
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*/ |
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private $aggregateRootClassName; |
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/** |
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* @var MessageRepository |
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*/ |
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private $messageRepository; |
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/** |
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* @var SnapshotRepository |
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*/ |
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private $snapshotRepository; |
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/** |
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* @var AggregateRootRepository |
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*/ |
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private $regularRepository; |
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public function __construct( |
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string $aggregateRootClassName, |
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MessageRepository $messageRepository, |
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SnapshotRepository $snapshotRepository, |
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AggregateRootRepository $regularRepository |
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) { |
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$this->aggregateRootClassName = $aggregateRootClassName; |
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$this->messageRepository = $messageRepository; |
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$this->snapshotRepository = $snapshotRepository; |
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$this->regularRepository = $regularRepository; |
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} |
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public function retrieveFromSnapshot(AggregateRootId $aggregateRootId): object |
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{ |
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$snapshot = $this->snapshotRepository->retrieve($aggregateRootId); |
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if ( ! $snapshot instanceof Snapshot) { |
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return $this->retrieve($aggregateRootId); |
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} |
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/** @var AggregateRootWithSnapshotting $className */ |
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$className = $this->aggregateRootClassName; |
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$events = $this->retrieveAllEventsAfterVersion($aggregateRootId, $snapshot->aggregateRootVersion()); |
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return $className::reconstituteFromSnapshotAndEvents($snapshot, $events); |
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} |
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public function storeSnapshot(AggregateRootWithSnapshotting $aggregateRoot): void |
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{ |
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$snapshot = $aggregateRoot->createSnapshot(); |
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$this->snapshotRepository->persist($snapshot); |
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} |
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private function retrieveAllEventsAfterVersion(AggregateRootId $aggregateRootId, int $version) |
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{ |
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/** @var Message[]|Generator $messages */ |
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$messages = $this->messageRepository->retrieveAllAfterVersion($aggregateRootId, $version); |
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foreach ($messages as $message) { |
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yield $message->event(); |
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} |
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return $messages->getReturn(); |
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} |
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public function retrieve(AggregateRootId $aggregateRootId): object |
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{ |
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return $this->regularRepository->retrieve($aggregateRootId); |
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} |
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public function persist(object $aggregateRoot): void |
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{ |
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$this->regularRepository->persist($aggregateRoot); |
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} |
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public function persistEvents(AggregateRootId $aggregateRootId, int $aggregateRootVersion, object ...$events): void |
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{ |
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$this->regularRepository->persistEvents($aggregateRootId, $aggregateRootVersion, ...$events); |
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} |
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} |
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EventSaucePHP /
EventSauce
