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<?php
/**
* This file is part of slick/event package
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Slick\Event\Domain;
use InvalidArgumentException;
use Ramsey\Uuid\Uuid;
* EventId
* @package Slick\Event\Domain
final class EventId
{
* @var string
private $identifier;
* Creates a EventId
* @param string $identifier
public function __construct(string $identifier = null)
$identifier = $identifier ?: Uuid::uuid4()->toString();
if (!Uuid::isValid($identifier)) {
throw new InvalidArgumentException(
"Invalid event identifier."
);
}
$this->identifier = $identifier;
* Event identifier as a string
* @return string
public function __toString()
return $this->identifier;
slickframework /
event
