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<?php |
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namespace Rawkode\Eidetic\EventSourcing; |
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use Rawkode\Eidetic\CQRS\WriteModelRepository; |
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use Rawkode\Eidetic\EventStore\EventStore; |
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use Rawkode\Eidetic\EventStore\VersionMismatchException; |
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/** |
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* Class Repository. |
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*/ |
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final class Repository implements WriteModelRepository |
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{ |
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/** @var $entityClass */ |
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private $entityClass; |
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/** @var EventStore $eventStore */ |
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private $eventStore; |
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/** |
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* @param string $class |
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* @param EventStore $eventStore |
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*/ |
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private function __construct($class, EventStore $eventStore) |
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{ |
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$this->entityClass = $class; |
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$this->eventStore = $eventStore; |
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} |
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/** |
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* @param $class |
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* @param EventStore $eventStore |
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* |
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* @return Repository |
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*/ |
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public static function createForWrites($class, EventStore $eventStore) |
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{ |
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return new self($class, $eventStore); |
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} |
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/** |
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* @param string $entityIdentifier |
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* |
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* @return mixed |
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*/ |
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public function load($entityIdentifier) |
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{ |
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$this->enforceTypeConstraint($this->eventStore->entityClass($entityIdentifier)); |
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$events = $this->eventStore->retrieve($entityIdentifier); |
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return call_user_func(array($this->entityClass, 'initialise'), $events); |
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} |
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/** |
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* @param EventSourcedEntity $eventSourcedEntity |
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* |
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* @throws \Exception |
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*/ |
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public function save(EventSourcedEntity $eventSourcedEntity) |
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{ |
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$this->enforceTypeConstraint(get_class($eventSourcedEntity)); |
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$this->enforceVersionMismatchConstraint($eventSourcedEntity); |
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$this->eventStore->store($eventSourcedEntity); |
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} |
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/** |
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* @param string $class |
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* |
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* @throws IncorrectEntityClassException |
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*/ |
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private function enforceTypeConstraint($class) |
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{ |
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if ($this->entityClass !== $class) { |
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throw new IncorrectEntityClassException(); |
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} |
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} |
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/** |
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* @param EventSourcedEntity $eventSourcedEntity |
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* |
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* @throws VersionMismatchException |
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*/ |
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private function enforceVersionMismatchConstraint(EventSourcedEntity $eventSourcedEntity) |
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{ |
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/** @var EventSourcedEntity $databaseVersion */ |
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$databaseVersion = $this->load($eventSourcedEntity->identifier()); |
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if ($databaseVersion->version() !== $eventSourcedEntity->version()) { |
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throw new VersionMismatchException('Local entity is at version ' |
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.$eventSourcedEntity->version().' and database is at '.$databaseVersion->version()); |
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} |
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} |
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} |
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rawkode /
eidetic
