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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\Aggregate; |
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use Gears\Aggregate\EventBehaviour; |
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use Gears\EventSourcing\Aggregate\Exception\AggregateException; |
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use Gears\EventSourcing\Event\AggregateEvent; |
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use Gears\EventSourcing\Event\AggregateEventArrayStream; |
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use Gears\EventSourcing\Event\AggregateEventStream; |
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use Gears\Identity\Identity; |
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/** |
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* Abstract aggregate root class. |
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*/ |
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abstract class AbstractAggregateRoot implements AggregateRoot |
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{ |
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use AggregateBehaviour, EventBehaviour; |
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/** |
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* @var AggregateEvent[] |
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*/ |
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private $recordedAggregateEvents = []; |
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/** |
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* Prevent aggregate root direct instantiation. |
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*/ |
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final protected function __construct() |
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{ |
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$this->version = 0; |
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} |
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/** |
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* Set aggregate identity. |
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* |
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* @param Identity $identity |
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*/ |
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final protected function setIdentity(Identity $identity): void |
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{ |
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$this->identity = $identity; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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final public static function reconstituteFromEventStream(AggregateEventStream $eventStream): self |
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{ |
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$instance = new static(); |
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$instance->replayAggregateEventStream($eventStream); |
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return $instance; |
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} |
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/** |
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* {@inheritdoc} |
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* |
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* @throws AggregateException |
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*/ |
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final public function replayAggregateEventStream(AggregateEventStream $eventStream): void |
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{ |
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foreach ($eventStream as $event) { |
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$this->version = $event->getAggregateVersion(); |
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$this->applyAggregateEvent($event); |
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} |
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} |
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/** |
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* Record aggregate event. |
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* |
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* @param AggregateEvent $event |
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* |
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* @throws AggregateException |
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*/ |
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final protected function recordAggregateEvent(AggregateEvent $event): void |
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{ |
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$this->version++; |
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$this->recordedAggregateEvents[] = $event->withAggregateVersion($this->version); |
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$this->applyAggregateEvent($event); |
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} |
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/** |
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* Apply aggregate event. |
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* |
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* @param AggregateEvent $event |
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* |
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* @throws AggregateException |
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*/ |
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final protected function applyAggregateEvent(AggregateEvent $event): void |
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{ |
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$method = $this->getAggregateEventApplyMethodName($event); |
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if (!\method_exists($this, $method)) { |
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throw new AggregateException(\sprintf( |
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'Aggregate event handling method %s for event %s does not exist', |
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$method, |
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\get_class($event) |
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)); |
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} |
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$this->$method($event); |
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} |
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/** |
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* Get event apply method name. |
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* |
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* @param AggregateEvent $event |
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* |
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* @return string |
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*/ |
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protected function getAggregateEventApplyMethodName(AggregateEvent $event): string |
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{ |
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$classParts = \explode('\\', \get_class($event)); |
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/** @var string $className */ |
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$className = \end($classParts); |
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return 'apply' . \str_replace(' ', '', \ucwords(\strtr($className, '_-', ' '))); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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final public function getRecordedAggregateEvents(): AggregateEventStream |
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{ |
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return new AggregateEventArrayStream($this->recordedAggregateEvents); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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final public function clearRecordedAggregateEvents(): void |
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{ |
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$this->recordedAggregateEvents = []; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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final public function collectRecordedAggregateEvents(): AggregateEventStream |
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{ |
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$recordedEvents = new AggregateEventArrayStream($this->recordedAggregateEvents); |
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$this->recordedAggregateEvents = []; |
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return $recordedEvents; |
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} |
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} |
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phpgears /
event-sourcing
