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<?php |
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namespace Rawkode\Eidetic\EventStore; |
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use Rawkode\Eidetic\EventSourcing\EventSourcedEntity; |
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abstract class EventStore implements Serializer |
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{ |
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use EventPublisherMixin; |
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// Subscriber hooks |
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const EVENT_STORED = 'eidetic.eventstore.event_stored'; |
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// Implement these in your concretion |
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/** |
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* @param EventSourcedEntity $eventSourcedEntity |
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* |
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* @throws InvalidEventException |
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*/ |
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abstract protected function persist(EventSourcedEntity $eventSourcedEntity); |
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/** |
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* Return all event log entries for $entityIdentifier. |
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* |
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* @param string $entityIdentifier |
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* |
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* @return array |
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*/ |
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abstract protected function eventLog($entityIdentifier); |
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abstract protected function startTransaction(); |
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abstract protected function abortTransaction(); |
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abstract protected function completeTransaction(); |
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abstract protected function countEntityEvents($entityIdentifier); |
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/** |
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* Returns the class associated with an entity identifier. |
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* |
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* @param string $entityIdentifier |
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* |
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* @return string |
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*/ |
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abstract protected function entityClass($entityIdentifier); |
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/** @var array */ |
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protected $stagedEvents = []; |
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/** @var Serializer */ |
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protected $serializer; |
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/** |
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* Store an EventSourcedEntity's staged events. |
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* |
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* @param EventSourcedEntity $eventSourcedEntity |
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*/ |
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public function store(EventSourcedEntity $eventSourcedEntity) |
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{ |
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try { |
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$this->startTransaction(); |
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$this->persist($eventSourcedEntity); |
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} catch (\Exception $exception) { |
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$this->abortTransaction(); |
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throw $exception; |
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} |
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$this->completeTransaction(); |
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} |
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/** |
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* Returns all events for $entityIdentifier. |
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* |
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* @param string $entityIdentifier |
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* |
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* @return array |
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*/ |
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public function retrieve($entityIdentifier) |
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{ |
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$eventLog = $this->eventLog($entityIdentifier); |
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return array_map(function ($eventLogEntry) { |
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return $eventLogEntry['event']; |
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}, $eventLog); |
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} |
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/** |
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* Returns all the log entries for $entityIdentifier. |
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* |
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* @param string $entityIdentifier |
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* |
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* @return array |
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*/ |
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public function retrieveLog($entityIdentifier) |
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{ |
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return $this->eventLog($entityIdentifier); |
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} |
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/** |
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* @param string $entityIdentifier |
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* |
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* @throws NoEventsFoundForKeyException |
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*/ |
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protected function verifyEventExistsForKey($entityIdentifier) |
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{ |
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if (0 === $this->countEntityEvents($entityIdentifier)) { |
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throw new NoEventsFoundForKeyException(); |
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} |
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} |
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/** |
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* @param object $object |
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* |
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* @return string |
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*/ |
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public function serialize($object) |
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{ |
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if (false === is_null($this->serializer)) { |
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return $this->serializer->serialize($object); |
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} |
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return base64_encode(serialize($object)); |
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} |
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/** |
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* @param string $serializedObject |
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* |
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* @return object |
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*/ |
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public function unserialize($serializedObject) |
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{ |
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if (false === is_null($this->serializer)) { |
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return $this->serializer->serialize($serializedObject); |
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} |
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return unserialize(base64_decode($serializedObject)); |
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} |
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} |
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rawkode /
eidetic
