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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\AggregateEventEmptyStream; |
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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\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<string, array<int, 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 loadEvents( |
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StoreStream $stream, |
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AggregateVersion $fromVersion, |
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?AggregateVersion $toVersion = null |
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): AggregateEventStream { |
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$streamId = $this->getStreamId($stream); |
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if (!isset($this->streams[$streamId][$fromVersion->getValue()])) { |
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// @codeCoverageIgnoreStart |
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return new AggregateEventEmptyStream(); |
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// @codeCoverageIgnoreEnd |
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} |
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$length = $toVersion !== null ? $toVersion->getValue() - $fromVersion->getValue() + 1 : null; |
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$events = \array_slice($this->streams[$streamId], $fromVersion->getValue() - 1, $length); |
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return new AggregateEventIteratorStream(new \ArrayIterator($events)); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function storeEvents(StoreStream $stream, AggregateEventStream $eventStream): void |
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{ |
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$streamId = $this->getStreamId($stream); |
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foreach ($eventStream as $aggregateEvent) { |
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$this->streams[$streamId][$aggregateEvent->getAggregateVersion()->getValue()] = $aggregateEvent; |
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} |
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\ksort($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 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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* {@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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* 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
