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<?php |
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namespace DDDominio\EventSourcing\Common; |
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use DDDominio\EventSourcing\Common\Annotation\AggregateId; |
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use DDDominio\EventSourcing\EventStore\EventStoreInterface; |
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use DDDominio\EventSourcing\Snapshotting\SnapshotStoreInterface; |
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use Doctrine\Common\Annotations\AnnotationReader; |
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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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* @param EventStoreInterface $eventStore |
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* @param SnapshotStoreInterface $snapshotStore |
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* @param AggregateReconstructor $aggregateReconstructor |
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* @param string $aggregateClass |
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*/ |
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public function __construct( |
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EventStoreInterface $eventStore, SnapshotStoreInterface $snapshotStore, $aggregateReconstructor, $aggregateClass |
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) { |
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$this->eventStore = $eventStore; |
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$this->snapshotStore = $snapshotStore; |
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$this->aggregateReconstructor = $aggregateReconstructor; |
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$this->aggregateClass = $aggregateClass; |
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} |
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/** |
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* @param EventSourcedAggregateRootInterface $aggregate |
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*/ |
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public function add($aggregate) |
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{ |
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$this->eventStore->appendToStream( |
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$this->streamIdFromAggregate($aggregate), |
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$aggregate->changes() |
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); |
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$aggregate->clearChanges(); |
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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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$this->eventStore->appendToStream( |
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$this->streamIdFromAggregate($aggregate), |
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$aggregate->changes(), |
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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 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 = $this->eventStore |
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->readStreamEventsForward($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 = $this->eventStore |
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->readStreamEventsForward( |
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$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 = $this->eventStore |
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->readStreamEventsForward( |
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$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 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 $this->streamIdFromAggregateId($this->aggregateId($aggregate)); |
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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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* @param object $aggregate |
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* @return string |
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* @throws \Exception |
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*/ |
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private function aggregateId($aggregate) |
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{ |
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if (method_exists($aggregate, 'id')) { |
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return (string) $aggregate->id(); |
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} |
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if (method_exists($aggregate, 'getId')) { |
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return (string) $aggregate->getId(); |
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} |
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$reflection = new \ReflectionClass($aggregate); |
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$annotationReader = new AnnotationReader(); |
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$aggregateIdMethodName = null; |
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foreach ($reflection->getMethods() as $reflectionMethod) { |
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$annotation = $annotationReader->getMethodAnnotation( |
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$reflectionMethod, |
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AggregateId::class |
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); |
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if (!is_null($annotation)) { |
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$aggregateIdMethodName = $reflectionMethod->getName(); |
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break; |
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} |
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} |
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if (is_null($aggregateIdMethodName)) { |
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throw new \RuntimeException('No method "id", "getId" or with "@AggregateId" annotation found in '. get_class($aggregate)); |
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} |
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return (string) $aggregate->{$aggregateIdMethodName}(); |
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} |
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} |
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DDDominio /
event-sourcing
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