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<?php |
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namespace DDDominio\EventSourcing\Common; |
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use DDDominio\EventSourcing\EventStore\EventStoreInterface; |
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use DDDominio\EventSourcing\Snapshotting\SnapshotStoreInterface; |
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class EventSourcedAggregateRepository |
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{ |
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/** |
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* @var EventStoreInterface |
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*/ |
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private $eventStore; |
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/** |
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* @var SnapshotStoreInterface |
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*/ |
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private $snapshotStore; |
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/** |
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* @var AggregateReconstructor |
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*/ |
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private $aggregateReconstructor; |
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/** |
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* @var string |
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*/ |
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private $aggregateClass; |
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/** |
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* @var AggregateIdExtractorInterface |
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*/ |
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private $aggregateIdExtractor; |
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/** |
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* @param EventStoreInterface $eventStore |
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* @param SnapshotStoreInterface $snapshotStore |
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* @param AggregateReconstructor $aggregateReconstructor |
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* @param AggregateIdExtractorInterface $aggregateIdExtractor |
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* @param string $aggregateClass |
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*/ |
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public function __construct( |
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EventStoreInterface $eventStore, |
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SnapshotStoreInterface $snapshotStore, |
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$aggregateReconstructor, |
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$aggregateIdExtractor, |
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$aggregateClass |
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) { |
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$this->eventStore = $eventStore; |
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$this->snapshotStore = $snapshotStore; |
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$this->aggregateReconstructor = $aggregateReconstructor; |
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$this->aggregateIdExtractor = $aggregateIdExtractor; |
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$this->aggregateClass = $aggregateClass; |
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} |
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/** |
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* @param EventSourcedAggregateRootInterface $aggregate |
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*/ |
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public function save($aggregate) |
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{ |
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$this->assertValidAggregate($aggregate); |
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$this->eventStore->appendToStream( |
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$this->streamIdFromAggregate($aggregate), |
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$aggregate->changes()->events(), |
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$aggregate->originalVersion() |
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); |
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$aggregate->clearChanges(); |
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} |
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/** |
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* @param $aggregate |
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*/ |
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private function assertValidAggregate($aggregate) |
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{ |
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if (is_null($aggregate)) { |
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throw new \InvalidArgumentException( |
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sprintf('EventSourcedAggregateRepository expects an aggregate of type "%s" but "NULL" given', $this->aggregateClass) |
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); |
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} |
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if (!($aggregate instanceof $this->aggregateClass)) { |
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throw new \InvalidArgumentException( |
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sprintf('EventSourcedAggregateRepository expects an aggregate of type "%s" but "%s" given', $this->aggregateClass, get_class($aggregate)) |
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); |
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} |
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} |
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/** |
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* @param string $id |
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* @return EventSourcedAggregateRootInterface |
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*/ |
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public function findById($id) |
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{ |
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$snapshot = $this->snapshotStore |
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->findLastSnapshot($this->aggregateClass, $id); |
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$streamId = $this->streamIdFromAggregateId($id); |
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if ($snapshot) { |
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$stream = $this->eventStore |
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->readStreamEvents($streamId, $snapshot->version() + 1); |
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} else { |
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$stream = $this->eventStore->readFullStream($streamId); |
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} |
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return $this->aggregateReconstructor->reconstitute( |
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$this->aggregateClass, |
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$stream, |
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$snapshot |
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); |
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} |
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/** |
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* @param string $id |
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* @param int $version |
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* @return EventSourcedAggregateRootInterface |
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*/ |
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public function findByIdAndVersion($id, $version) |
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{ |
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$snapshot = $this->snapshotStore |
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->findNearestSnapshotToVersion($this->aggregateClass, $id, $version); |
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$streamId = $this->streamIdFromAggregateId($id); |
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if ($snapshot) { |
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$stream = $this->eventStore |
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->readStreamEvents( |
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$streamId, |
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$snapshot->version() + 1, |
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$version - $snapshot->version() |
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); |
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} else { |
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$stream = $this->eventStore |
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->readStreamEvents( |
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$streamId, |
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1, |
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$version |
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); |
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} |
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return $this->aggregateReconstructor->reconstitute( |
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$this->aggregateClass, |
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$stream, |
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$snapshot |
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); |
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} |
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/** |
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* @param string $id |
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* @param \DateTimeImmutable $datetime |
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* @return EventSourcedAggregateRootInterface |
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*/ |
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public function findByIdAndDatetime($id, $datetime) |
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{ |
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$streamId = $this->streamIdFromAggregateId($id); |
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$version = $this->eventStore->getStreamVersionAt($streamId, $datetime); |
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return $this->findByIdAndVersion($id, $version); |
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} |
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/** |
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* @param EventSourcedAggregateRootInterface $aggregate |
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* @return string |
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*/ |
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private function streamIdFromAggregate($aggregate) |
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{ |
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return $this->streamIdFromAggregateId( |
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$this->aggregateIdExtractor->extract($aggregate) |
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); |
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} |
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/** |
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* @param string $aggregateId |
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* @return string |
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*/ |
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protected function streamIdFromAggregateId($aggregateId) |
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{ |
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return $this->aggregateClass . '-' . $aggregateId; |
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} |
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} |
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DDDominio /
event-sourcing
