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<?php namespace C4tech\RayEmitter\Domain; |
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use C4tech\RayEmitter\Contracts\Domain\Aggregate as AggregateInterface; |
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use C4tech\RayEmitter\Contracts\Domain\Command as CommandInterface; |
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use C4tech\RayEmitter\Contracts\Domain\Repository as RepositoryInterface; |
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use C4tech\RayEmitter\Facades\EventStore; |
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use C4tech\RayEmitter\Exceptions\OutdatedSequence; |
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use C4tech\RayEmitter\Exceptions\SequenceMismatch; |
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abstract class Repository implements RepositoryInterface |
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{ |
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/** |
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* @inheritDoc |
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*/ |
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public static function find($identifier) |
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{ |
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$aggregate = static::create(); |
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static::restore($identifier, $aggregate); |
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return $aggregate; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public static function getEntity($identifier) |
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{ |
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$aggregate = static::find($identifier); |
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return $aggregate->getEntity(); |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public static function handle(CommandInterface $command) |
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{ |
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$aggregate = static::create(); |
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if ($aggregate_id = $command->getAggregateId()) { |
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static::restore($aggregate_id, $aggregate); |
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} |
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// Optimistic concurrency handling |
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$expected = $command->getExpectedSequence(); |
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$current = $aggregate->getSequence(); |
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if ($expected < $current) { |
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throw new OutdatedSequence( |
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sprintf( |
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'The Aggregate %s has newer data than expected.', |
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get_class($aggregate) |
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), |
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409 |
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); |
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} elseif ($expected > $current) { |
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throw new SequenceMismatch( |
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sprintf( |
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'The Aggregate %s is expected to have more data than it does', |
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get_class($aggregate) |
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), |
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422 |
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); |
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} |
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$aggregate->handle($command); |
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} |
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/** |
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* Restore |
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* |
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* Hydrate an aggregate with its recorded events. |
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* @param string $identifier Aggregate root entity identifier. |
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* @param AggregateInterface &$aggregate (Fresh) Aggregate to hydrate. |
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* @return void |
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*/ |
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protected static function restore($identifier, AggregateInterface &$aggregate) |
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{ |
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$events = EventStore::getFor($identifier); |
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$aggregate->hydrate($events); |
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} |
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} |
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C4Tech /
laravel-ray-emitter
