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<?php |
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/* |
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* event-sourcing (https://github.com/phpgears/event-sourcing). |
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* Event Sourcing base. |
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* |
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* @license MIT |
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* @link https://github.com/phpgears/event-sourcing |
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* @author Julián Gutiérrez <[email protected]> |
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*/ |
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declare(strict_types=1); |
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namespace Gears\EventSourcing\Store\Event; |
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use Gears\EventSourcing\Aggregate\AggregateVersion; |
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use Gears\EventSourcing\Event\AggregateEvent; |
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use Gears\EventSourcing\Event\AggregateEventIteratorStream; |
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use Gears\EventSourcing\Event\AggregateEventStream; |
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use Gears\EventSourcing\Store\Event\Exception\EventStoreException; |
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use Gears\EventSourcing\Store\StoreStream; |
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/** |
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* In memory Event Store implementation. |
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*/ |
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final class InMemoryEventStore extends AbstractEventStore |
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{ |
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/** |
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* AggregateEvents streams. |
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* |
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* @var array<AggregateEvent[]> |
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*/ |
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private $streams = []; |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function loadEventsFrom( |
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StoreStream $stream, |
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AggregateVersion $fromVersion, |
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?int $count = null |
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): AggregateEventStream { |
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$events = new \ArrayObject(); |
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$streamId = $this->getStreamId($stream); |
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if (!isset($this->streams[$streamId][$fromVersion->getValue()])) { |
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// @codeCoverageIgnoreStart |
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return new AggregateEventIteratorStream($events->getIterator()); |
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// @codeCoverageIgnoreEnd |
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} |
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foreach ($this->streams[$streamId] as $version => $event) { |
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if ($version >= $fromVersion->getValue()) { |
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$events->append($event); |
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} |
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if ($count !== null && \count($events) === $count) { |
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break; |
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} |
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} |
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return new AggregateEventIteratorStream($events->getIterator()); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function loadEventsTo( |
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StoreStream $stream, |
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AggregateVersion $toVersion, |
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AggregateVersion $fromVersion |
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): AggregateEventStream { |
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$events = new \ArrayObject(); |
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$streamId = $this->getStreamId($stream); |
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if (!isset($this->streams[$streamId][$fromVersion->getValue()])) { |
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// @codeCoverageIgnoreStart |
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return new AggregateEventIteratorStream($events->getIterator()); |
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// @codeCoverageIgnoreEnd |
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} |
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foreach ($this->streams[$streamId] as $version => $event) { |
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if ($version >= $fromVersion->getValue() && $version <= $toVersion->getValue()) { |
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$events->append($event); |
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} |
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if ($version >= $toVersion->getValue()) { |
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break; |
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} |
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} |
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return new AggregateEventIteratorStream($events->getIterator()); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function storeEvents( |
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StoreStream $stream, |
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AggregateEventStream $eventStream, |
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AggregateVersion $expectedVersion |
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): void { |
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$lastVersion = $this->getStreamVersion($stream); |
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$streamId = $this->getStreamId($stream); |
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foreach ($eventStream as $aggregateEvent) { |
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$aggregateVersion = $aggregateEvent->getAggregateVersion(); |
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if (!$aggregateVersion->getPrevious()->isEqualTo($lastVersion)) { |
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throw new EventStoreException(\sprintf( |
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'Aggregate event for version "%s" cannot be stored', |
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$aggregateVersion->getValue() |
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)); |
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} |
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$this->streams[$streamId][$aggregateVersion->getValue()] = $aggregateEvent; |
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$lastVersion = $lastVersion->getNext(); |
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} |
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\ksort($this->streams[$streamId]); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function getStreamVersion(StoreStream $stream): AggregateVersion |
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{ |
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$streamId = $this->getStreamId($stream); |
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if (\count($this->streams[$streamId]) === 0) { |
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return new AggregateVersion(0); |
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} |
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$versions = \array_keys($this->streams[$streamId]); |
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/** @var int $version */ |
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$version = \end($versions); |
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return new AggregateVersion($version); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function streamExists(StoreStream $stream): bool |
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{ |
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return isset($this->streams[$this->getStreamId($stream)]); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function createStream(StoreStream $stream): void |
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{ |
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$this->streams[$this->getStreamId($stream)] = []; |
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} |
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/** |
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* Get stream identifier. |
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* |
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* @param StoreStream $stream |
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* |
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* @return string |
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*/ |
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private function getStreamId(StoreStream $stream): string |
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{ |
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return $stream->getAggregateId()->getValue(); |
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} |
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} |
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phpgears /
event-sourcing
