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implement event stream as an iterator
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,155 @@ | ||
| <?php | ||
| /* | ||
| * This file is part of the prooph/event-store-mongodb-adapter. | ||
| * (c) 2014 - 2015 prooph software GmbH <contact@prooph.de> | ||
| * | ||
| * For the full copyright and license information, please view the LICENSE | ||
| * file that was distributed with this source code. | ||
| * | ||
| * Date: 09/25/15 - 15:29 | ||
| */ | ||
|
|
||
| namespace Prooph\EventStore\Adapter\Doctrine; | ||
|
|
||
| use Iterator; | ||
| use Doctrine\DBAL\Driver\PDOStatement; | ||
| use Prooph\Common\Messaging\Message; | ||
| use Prooph\Common\Messaging\MessageFactory; | ||
| use Prooph\EventStore\Adapter\PayloadSerializer; | ||
|
|
||
| /** | ||
| * Class DoctrineStreamIterator | ||
| * @package Prooph\EventStore\Adapter\Doctrine | ||
| */ | ||
| final class DoctrineStreamIterator implements Iterator | ||
| { | ||
| /** | ||
| * @var PDOStatement | ||
| */ | ||
| private $statement; | ||
|
|
||
| /** | ||
| * @var MessageFactory | ||
| */ | ||
| private $messageFactory; | ||
|
|
||
| /** | ||
| * @var PayloadSerializer | ||
| */ | ||
| private $payloadSerializer; | ||
|
|
||
| /** | ||
| * @var array | ||
| */ | ||
| private $metadata; | ||
|
|
||
| /** | ||
| * @var array | ||
| */ | ||
| private $standardColumns = ['event_id', 'event_name', 'created_at', 'payload', 'version']; | ||
|
|
||
| /** | ||
| * @var array|false | ||
| */ | ||
| private $currentItem; | ||
|
|
||
| /** | ||
| * @var int | ||
| */ | ||
| private $currentKey = -1; | ||
|
|
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| /** | ||
| * @param PDOStatement $statement | ||
| * @param MessageFactory $messageFactory | ||
| * @param PayloadSerializer $payloadSerializer | ||
| * @param array $metadata | ||
| */ | ||
| public function __construct( | ||
| PDOStatement $statement, | ||
| MessageFactory $messageFactory, | ||
| PayloadSerializer $payloadSerializer, | ||
| array $metadata | ||
| ) { | ||
| $this->statement = $statement; | ||
| $this->messageFactory = $messageFactory; | ||
| $this->payloadSerializer = $payloadSerializer; | ||
| $this->metadata = $metadata; | ||
|
|
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| $this->next(); | ||
| } | ||
|
|
||
| /** | ||
| * @return null|Message | ||
| */ | ||
| public function current() | ||
| { | ||
| if (false === $this->currentItem) { | ||
| return null; | ||
| } | ||
|
|
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| $payload = $this->payloadSerializer->unserializePayload($this->currentItem['payload']); | ||
|
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| //Add metadata stored in table | ||
| foreach ($this->currentItem as $key => $value) { | ||
| if (! in_array($key, $this->standardColumns)) { | ||
| $metadata[$key] = $value; | ||
| } | ||
| } | ||
|
|
||
| $createdAt = \DateTimeImmutable::createFromFormat( | ||
| 'Y-m-d\TH:i:s.u', | ||
| $this->currentItem['created_at'], | ||
| new \DateTimeZone('UTC') | ||
| ); | ||
|
|
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| return $this->messageFactory->createMessageFromArray($this->currentItem['event_name'], [ | ||
| 'uuid' => $this->currentItem['event_id'], | ||
| 'version' => (int) $this->currentItem['version'], | ||
| 'created_at' => $createdAt, | ||
| 'payload' => $payload, | ||
| 'metadata' => $this->metadata | ||
| ]); | ||
| } | ||
|
|
||
| /** | ||
| * Next | ||
| */ | ||
| public function next() | ||
| { | ||
| $this->currentItem = $this->statement->fetch(); | ||
|
|
||
| if (false !== $this->currentItem) { | ||
| $this->currentKey++; | ||
| } else { | ||
| $this->currentKey = -1; | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * @return bool|int | ||
| */ | ||
| public function key() | ||
| { | ||
| if (-1 === $this->currentKey) { | ||
| return false; | ||
| } | ||
|
|
||
| return $this->currentKey; | ||
| } | ||
|
|
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| /** | ||
| * @return bool | ||
| */ | ||
| public function valid() | ||
| { | ||
| return false !== $this->currentItem; | ||
| } | ||
|
|
||
| /** | ||
| * Rewind (does nothing) | ||
| */ | ||
| public function rewind() | ||
| { | ||
| // do nothing | ||
| } | ||
| } |
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