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<?php |
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namespace Rawkode\Eidetic\EventStore\DBALEventStore; |
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use Doctrine\DBAL\Connection; |
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use Doctrine\DBAL\DriverManager; |
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use Doctrine\DBAL\Query\QueryBuilder; |
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use Rawkode\Eidetic\EventStore\EventStore; |
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use Rawkode\Eidetic\EventStore\NoEventsFoundForKeyException; |
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use Rawkode\Eidetic\EventSourcing\EventSourcedEntity; |
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final class DBALEventStore extends EventStore |
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{ |
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/** |
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* @var string |
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*/ |
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private $tableName; |
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/** |
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* @var Connection |
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*/ |
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private $connection; |
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/** |
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* @param string $tableName |
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* @param Connection $connection |
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*/ |
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private function __construct($tableName, Connection $connection) |
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{ |
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$this->tableName = $tableName; |
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$this->connection = $connection; |
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} |
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/** |
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* @param string $tableName |
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* @param array $options |
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* |
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* @return static |
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*/ |
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public static function createWithOptions($tableName, array $options) |
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{ |
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$connection = DriverManager::getConnection($options); |
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return new static($tableName, $connection); |
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} |
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/** |
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* @param string $tableName |
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* @param Connection $connection |
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* |
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* @return static |
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*/ |
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public static function createWithConnection($tableName, Connection $connection) |
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{ |
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return new static($tableName, $connection); |
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} |
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/** |
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* @param EventSourcedEntity $eventSourcedEntity |
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*/ |
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protected function persist(EventSourcedEntity $eventSourcedEntity, $event) |
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{ |
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$eventCount = $this->countEntityEvents($eventSourcedEntity->identifier()); |
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$this->connection->insert($this->tableName, [ |
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'entity_identifier' => $eventSourcedEntity->identifier(), |
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'serial_number' => ++$eventCount, |
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'entity_class' => get_class($eventSourcedEntity), |
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'recorded_at' => new \DateTime('now', new \DateTimeZone('UTC')), |
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'event_class' => get_class($event), |
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'event' => $this->serialize($event), |
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], [ |
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\PDO::PARAM_STR, |
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\PDO::PARAM_INT, |
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\PDO::PARAM_STR, |
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'datetime', |
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\PDO::PARAM_STR, |
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\PDO::PARAM_STR, |
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]); |
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array_push($this->stagedEvents, $event); |
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} |
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/** |
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* @param string $entityIdentifier |
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* |
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* @throws NoEventsFoundForKeyException |
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* |
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* @return array |
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*/ |
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protected function eventLog($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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$statement = $this->eventLogQuery($entityIdentifier)->execute(); |
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$eventLog = $statement->fetchAll(); |
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return array_map(function ($eventLogEntry) { |
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$eventLogEntry['event'] = $this->unserialize($eventLogEntry['event']); |
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$eventLogEntry['recorded_at'] = new \DateTime($eventLogEntry['recorded_at']); |
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return $eventLogEntry; |
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}, $eventLog); |
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} |
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/** |
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*/ |
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protected function startTransaction(EventSourcedEntity $eventSourcedEntity) |
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{ |
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$this->connection->beginTransaction(); |
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$this->stagedEvents = []; |
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} |
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/** |
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*/ |
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protected function abortTransaction(EventSourcedEntity $eventSourcedEntity) |
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{ |
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$this->connection->rollBack(); |
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$this->stagedEvents = []; |
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} |
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/** |
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*/ |
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protected function completeTransaction(EventSourcedEntity $eventSourcedEntity) |
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{ |
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$this->connection->commit(); |
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$this->stagedEvents = []; |
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} |
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/** |
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*/ |
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public function createTable() |
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{ |
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$schemaManager = $this->connection->getSchemaManager(); |
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$schema = $schemaManager->createSchema(); |
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if ($schema->hasTable($this->tableName)) { |
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throw new TableAlreadyExistsException(); |
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} |
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$table = $schema->createTable($this->tableName); |
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$table->addColumn('entity_identifier', 'string', ['length' => 255]); |
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$table->addColumn('serial_number', 'integer'); |
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$table->setPrimaryKey(['entity_identifier', 'serial_number']); |
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$table->addColumn('entity_class', 'string', ['length' => 255]); |
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$table->addColumn('recorded_at', 'datetime'); |
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$table->addColumn('event_class', 'string', ['length' => 255]); |
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$table->addColumn('event', 'text'); |
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$table->addIndex(['entity_class']); |
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$table->addIndex(['recorded_at']); |
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$table->addIndex(['event_class']); |
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$schemaManager->createTable($table); |
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} |
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/** |
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*/ |
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public function dropTable() |
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{ |
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$this->connection->getSchemaManager()->dropTable($this->tableName); |
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} |
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/** |
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* @param string $entityIdentifier |
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* |
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* @return int |
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*/ |
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protected function countEntityEvents($entityIdentifier) |
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{ |
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/* @var QueryBuilder $queryBuilder */ |
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$queryBuilder = $this->connection->createQueryBuilder(); |
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$queryBuilder->select('COUNT(entity_identifier)'); |
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$queryBuilder->from($this->tableName); |
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$queryBuilder->where('entity_identifier = :entity_identifier'); |
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$queryBuilder->setParameter('entity_identifier', $entityIdentifier); |
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return (int) $queryBuilder->execute()->fetchColumn(0); |
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} |
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/** |
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* @param string $entityIdentifier |
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* |
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* @return \Doctrine\DBAL\Query\QueryBuilder |
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*/ |
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protected function eventLogQuery($entityIdentifier) |
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{ |
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/* @var QueryBuilder $queryBuilder */ |
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$queryBuilder = $this->connection->createQueryBuilder(); |
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$queryBuilder->select('*'); |
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$queryBuilder->from($this->tableName); |
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$queryBuilder->where('entity_identifier = :entity_identifier'); |
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$queryBuilder->orderBy('serial_number', 'ASC'); |
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$queryBuilder->setParameter('entity_identifier', $entityIdentifier); |
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return $queryBuilder; |
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} |
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/** |
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* @param string $entityIdentifier |
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* |
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* @throws NoEventsFoundForKeyException |
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* |
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* @return string |
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*/ |
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public function entityClass($entityIdentifier) |
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{ |
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$this->verifyEventExistsForKey($entityIdentifier); |
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/* @var QueryBuilder $queryBuilder */ |
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$queryBuilder = $this->connection->createQueryBuilder(); |
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$queryBuilder->select('entity_class'); |
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$queryBuilder->from($this->tableName); |
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$queryBuilder->where('entity_identifier = :entity_identifier'); |
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$queryBuilder->orderBy('serial_number', 'ASC'); |
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$queryBuilder->setMaxResults(1); |
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$queryBuilder->setParameter('entity_identifier', $entityIdentifier); |
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return $queryBuilder->execute()->fetchColumn(0); |
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} |
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} |
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