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<?php |
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namespace Domain\Aggregates; |
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use Domain\Eventing\DomainEvent; |
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use Domain\Eventing\UncommittedEvents; |
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/** |
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* Sane default Behaviour and state for the RecordsEvents interface |
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* |
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* @author Sebastiaan Hilbers <[email protected]> |
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*/ |
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trait EventSourced |
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{ |
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/** |
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* Collection of events that are not persisted yet |
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* @var UncommittedEvents |
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*/ |
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private $uncommittedEvents; |
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/** |
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* Determine whether the object's state has changed since the last clearChanges(); |
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* |
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* @return bool |
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*/ |
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public function hasChanges() |
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{ |
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return !empty($this->uncommittedEvents); |
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} |
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/** |
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* Get all changes to the object since the last the last clearChanges(); |
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* |
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* @return UncommittedEvents |
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*/ |
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public function getChanges() |
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{ |
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return $this->uncommittedEvents; |
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} |
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/** |
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* Clear all state changes from this object. |
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* |
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* @return static |
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*/ |
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public function clearChanges() |
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{ |
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$this->uncommittedEvents = new UncommittedEvents($this->getIdentity()); |
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return $this; |
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} |
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/** |
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* Register a event happening on the aggregate |
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* |
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* @param DomainEvent $event |
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* @return static |
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*/ |
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public function recordThat(DomainEvent $event) |
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{ |
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$this->bumpVersion(); |
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if (is_null($this->uncommittedEvents)) { |
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$this->uncommittedEvents = new UncommittedEvents($this->getIdentity()); |
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} |
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$this->uncommittedEvents->append($event); |
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$this->when($event); |
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return $this; |
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} |
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abstract protected function bumpVersion(); |
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/** |
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* The concrete class should have this method |
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*/ |
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abstract protected function when(DomainEvent $event); |
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/** |
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* The concrete class should have this method |
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*/ |
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abstract protected function getIdentity(); |
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} |
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bashilbers /
domain
