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<?php |
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namespace Gica\Cqrs\EventStore\InMemory; |
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use Gica\Cqrs\Event; |
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use Gica\Cqrs\Event\EventWithMetaData; |
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use Gica\Cqrs\Event\MetaData; |
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use Gica\Cqrs\EventStore; |
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use Gica\Cqrs\EventStore\AggregateEventStream; |
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use Gica\Cqrs\EventStore\EventStream; |
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use Gica\Cqrs\EventStore\Exception\ConcurrentModificationException; |
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class InMemoryEventStore implements EventStore |
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{ |
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public $events = []; |
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private $versions = []; |
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private $latestSequence = 0; |
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public function loadEventsForAggregate(string $aggregateClass, $aggregateId): AggregateEventStream |
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{ |
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return new InMemoryAggregateEventStream($this->getEventsArrayForAggregate($aggregateClass, $aggregateId), $aggregateClass, $aggregateId, $this->latestSequence); |
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} |
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public function appendEventsForAggregate($aggregateId, string $aggregateClass, $eventsWithMetaData, int $expectedVersion, int $expectedSequence) |
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{ |
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if ($this->getAggregateVersion($aggregateClass, $aggregateId) != $expectedVersion) { |
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throw new ConcurrentModificationException(); |
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} |
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$this->addEventsToArrayForAggregate($aggregateId, $aggregateClass, $eventsWithMetaData); |
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$this->versions[$this->constructKey($aggregateClass, $aggregateId)] = $expectedVersion + 1; |
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$this->latestSequence = $expectedSequence + 1; |
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} |
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public function appendEventsForAggregateWithoutChecking($aggregateId, $aggregateClass, $newEvents) |
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{ |
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$this->addEventsToArrayForAggregate($aggregateId, $aggregateClass, $this->decorateEventsWithMetadata($aggregateClass, $aggregateId, $newEvents)); |
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$constructKey = $this->constructKey($aggregateClass, $aggregateId); |
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if (!isset($this->versions[$constructKey])) { |
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$this->versions[$constructKey] = 0; |
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} |
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$this->versions[$constructKey]++; |
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$this->latestSequence++; |
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} |
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private function getEventsArrayForAggregate(string $aggregateClass, $aggregateId) |
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{ |
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$aggregateKey = $this->constructKey($aggregateClass, $aggregateId); |
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return isset($this->events[$aggregateKey]) ? $this->events[$aggregateKey] : []; |
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} |
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private function addEventsToArrayForAggregate($aggregateId, $aggregateClass, $newEvents) |
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{ |
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foreach ($newEvents as $event) { |
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$this->events[$this->constructKey($aggregateClass, $aggregateId)][] = $event; |
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} |
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} |
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public function loadEventsByClassNames(array $eventClasses): EventStream |
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{ |
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$result = []; |
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foreach ($this->events as $aggregateKey => $events) { |
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/** @var EventWithMetaData[] $events */ |
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foreach ($events as $eventWithMetaData) { |
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if ($this->eventHasAnyOfThisClasses($eventWithMetaData->getEvent(), $eventClasses)) { |
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$result[] = $eventWithMetaData; |
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} |
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} |
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} |
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return new RawEventStream($result); |
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} |
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private function eventHasAnyOfThisClasses($event, array $eventClasses) |
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{ |
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foreach ($eventClasses as $eventClass) { |
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if (is_subclass_of($event, $eventClass) || get_class($event) === $eventClass) { |
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return true; |
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} |
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} |
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return false; |
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} |
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public function getAggregateVersion(string $aggregateClass, $aggregateId) |
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{ |
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$key = $this->constructKey($aggregateClass, $aggregateId); |
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return isset($this->versions[$key]) ? $this->versions[$key] : 0; |
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} |
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/** |
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* @param $aggregateClass |
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* @param $aggregateId |
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* @param Event[] $priorEvents |
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* @return EventWithMetaData[] |
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*/ |
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public function decorateEventsWithMetadata($aggregateClass, $aggregateId, array $priorEvents) |
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{ |
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return array_map(function (Event $event) use ($aggregateClass, $aggregateId) { |
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return new EventWithMetaData($event, new MetaData( |
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$aggregateId, $aggregateClass, new \DateTimeImmutable(), null |
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)); |
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}, $priorEvents); |
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} |
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public function fetchLatestSequence(): int |
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{ |
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return $this->latestSequence; |
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} |
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private function constructKey(string $aggregateClass, $aggregateId): string |
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{ |
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return $aggregateClass . '_' . (string)$aggregateId; |
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} |
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} |
xprt64 /
cqrs-es
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