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<?php
declare(strict_types=1);
namespace Yiisoft\EventDispatcher\Provider;
use Psr\EventDispatcher\EventDispatcherInterface;
use Psr\EventDispatcher\ListenerProviderInterface;
/**
* DeferredProvider is a listener provider that allows you to perform deferred
* events
*/
final class DeferredProvider implements ListenerProviderInterface
{
private EventDispatcherInterface $dispatcher;
private bool $deferEvents = false;
private array $events = [];
public function __construct(EventDispatcherInterface $dispatcher)
$this->dispatcher = $dispatcher;
}
public function getListenersForEvent(object $event): iterable
if ($this->deferEvents) {
yield fn($event) => $this->addEvent($event);
} else {
yield fn($event) => $this->dispatchEvent($event);
public function deferEvents(): void
$this->deferEvents = true;
public function clearEvents(): void
$this->events = [];
public function dispatchEvents(): array
$events = $this->events;
$this->clearEvents();
$this->deferEvents = false;
$dispatchedEvents = [];
foreach ($events as $event) {
$dispatchedEvents[] = $this->dispatchEvent($event);
return $dispatchedEvents;
private function addEvent(object $event): void
$this->events[] = $event;
private function dispatchEvent(object $event): object
return $this->dispatcher->dispatch($event);
yiisoft /
event-dispatcher
