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<?php |
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/** |
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* Copyright 2014 SURFnet bv |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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namespace Surfnet\StepupMiddleware\MiddlewareBundle\EventSourcing; |
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use Broadway\Domain\DateTime; |
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use Broadway\Domain\DomainEventStream; |
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use Broadway\Domain\DomainMessage; |
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use Broadway\Serializer\SerializerInterface; |
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use Doctrine\DBAL\Connection; |
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use PDO; |
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use Surfnet\StepupMiddleware\CommandHandlingBundle\SensitiveData\Forgettable; |
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use Surfnet\StepupMiddleware\CommandHandlingBundle\SensitiveData\SensitiveData; |
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class DBALEventHydrator |
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{ |
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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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* @var \Broadway\Serializer\SerializerInterface |
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*/ |
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private $payloadSerializer; |
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/** |
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* @var \Broadway\Serializer\SerializerInterface |
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*/ |
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private $metadataSerializer; |
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/** |
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* @var string |
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*/ |
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private $eventStreamTableName; |
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/** |
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* @var string |
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*/ |
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private $sensitiveDataTable; |
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/** |
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* @var \Doctrine\DBAL\Driver\Statement |
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*/ |
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private $loadStatement = null; |
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/** |
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* @param Connection $connection |
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* @param SerializerInterface $payloadSerializer |
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* @param SerializerInterface $metadataSerializer |
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* @param string $eventStreamTable |
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* @param string $sensitiveDataTable |
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*/ |
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public function __construct( |
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Connection $connection, |
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SerializerInterface $payloadSerializer, |
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SerializerInterface $metadataSerializer, |
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$eventStreamTable, |
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$sensitiveDataTable |
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) { |
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$this->connection = $connection; |
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$this->payloadSerializer = $payloadSerializer; |
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$this->metadataSerializer = $metadataSerializer; |
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$this->eventStreamTableName = $eventStreamTable; |
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$this->sensitiveDataTable = $sensitiveDataTable; |
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} |
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/** |
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* @return string |
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* @throws \Doctrine\DBAL\DBALException |
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*/ |
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public function getCount() |
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{ |
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$statement = $this->connection->prepare('SELECT COUNT(1) AS cnt FROM ' . $this->eventStreamTableName); |
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$statement->execute(); |
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$row = $statement->fetch(); |
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return $row['cnt']; |
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} |
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/** |
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* @param int $limit |
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* @param int $offset |
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* @return DomainEventStream |
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*/ |
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public function getFromTill($limit, $offset) |
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{ |
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$statement = $this->prepareLoadStatement(); |
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$statement->bindValue('limit', $limit, PDO::PARAM_INT); |
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$statement->bindValue('offset', $offset, PDO::PARAM_INT); |
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$statement->execute(); |
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$events = array(); |
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while ($row = $statement->fetch()) { |
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$events[] = $this->deserializeEvent($row); |
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} |
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return new DomainEventStream($events); |
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} |
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private function deserializeEvent($row) |
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{ |
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$event = $this->payloadSerializer->deserialize(json_decode($row['payload'], true)); |
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if ($event instanceof Forgettable) { |
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$event->setSensitiveData(SensitiveData::deserialize(json_decode($row['sensitive_data'], true))); |
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} |
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return new DomainMessage( |
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$row['uuid'], |
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$row['playhead'], |
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$this->metadataSerializer->deserialize(json_decode($row['metadata'], true)), |
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$event, |
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DateTime::fromString($row['recorded_on']) |
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); |
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} |
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private function prepareLoadStatement() |
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{ |
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if ($this->loadStatement === null) { |
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$query = str_replace( |
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['%es%', '%sd%'], |
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[$this->eventStreamTableName, $this->sensitiveDataTable], |
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'SELECT %es%.uuid, %es%.playhead, %es%.metadata, %es%.payload, %es%.recorded_on, %sd%.sensitive_data |
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FROM %es% |
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LEFT JOIN %sd% |
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ON %es%.uuid = %sd%.identity_id |
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AND %es%.playhead = %sd%.playhead |
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ORDER BY recorded_on ASC |
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LIMIT :limit OFFSET :offset' |
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); |
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$this->loadStatement = $this->connection->prepare($query); |
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} |
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return $this->loadStatement; |
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} |
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} |
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OpenConext /
Stepup-Middleware
