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<?php declare(strict_types=1);
namespace OpenEngine\EventDispatcher;
use Psr\EventDispatcher\EventDispatcherInterface;
use Psr\EventDispatcher\ListenerProviderInterface;
use Psr\EventDispatcher\StoppableEventInterface;
/**
* Defines a dispatcher for events.
*/
class EventDispatcher implements EventDispatcherInterface
{
* @var ListenerProviderInterface
private $provider;
* EventDispatcher constructor.
* @param ListenerProviderInterface $provider
public function __construct(ListenerProviderInterface $provider)
$this->provider = $provider;
}
* Provide all listeners with an event to process.
*
* @param object $event
* The object to process.
* @return object
* The Event that was passed, now modified by listeners.
public function dispatch(object $event)
$returnedEvent = $event;
foreach ($this->provider->getListenersForEvent($event) as $listener) {
$returnedEvent = $listener($event);
if (!$returnedEvent instanceof $event) {
throw new \LogicException('Listener must return same event');
if ($returnedEvent instanceof StoppableEventInterface && $returnedEvent->isPropagationStopped()) {
break;
return $returnedEvent;
open-engine /
event-dispatcher
