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<?php |
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namespace Domain\Eventing; |
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use Domain\Identity\Identity; |
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/** |
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* @author Sebastiaan Hilbers <[email protected]> |
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*/ |
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final class FileEventStore implements EventStore |
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{ |
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private $dataPath; |
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public function __construct($dataPath) |
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{ |
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$this->dataPath = $dataPath; |
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} |
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/** |
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* Serialize given events and save them do disk. |
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* Actually, each event is a new line inside a single file for each aggregate |
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* |
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* @param \Domain\Eventing\UncommittedEvents $events |
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* @return void |
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*/ |
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public function commit(UncommittedEvents $events) |
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{ |
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$aggregateId = (string) $events[0]->getAggregateIdentity(); |
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$stream = fopen($this->dataPath . '/' . $aggregateId, 'a'); |
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$i = 0; |
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foreach ($events as $event) { |
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$content = ($i > 0) ? PHP_EOL : ''; |
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$content .= serialize($event); |
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fwrite($stream, $content); |
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$i++; |
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} |
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fclose($stream); |
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} |
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/** |
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* Open the aggregate file and read lines from $min to $max, unserialize and return |
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* immutable event stream as "committed events". |
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* |
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* @param \Domain\Identity\Identity $id |
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* @param integer $offset |
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* @param integer $max |
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* @return \Domain\Eventing\CommittedEvents |
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*/ |
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public function getAggregateHistoryFor(Identity $id, $offset = 0, $max = null) |
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{ |
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$stream = fopen($this->dataPath . '/' . (string) $id, 'r'); |
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$events = []; |
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$i = 0; |
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while (!feof($stream)) { |
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if (!is_null($max) && $i > $max) { |
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break; |
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} |
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if ($i < $offset) { |
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continue; |
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} |
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$events[] = unserialize(fgets($stream)); |
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++$i; |
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} |
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fclose($stream); |
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return new CommittedEvents($id, $events); |
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} |
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} |
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bashilbers /
domain
