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<?php |
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namespace Cmp\Queues\Domain\Event; |
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use Cmp\Queues\Domain\Event\Exception\DomainEventException; |
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use Cmp\Queues\Domain\Queue\Exception\GracefulStopException; |
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use Cmp\Queues\Domain\Queue\Exception\TimeoutReaderException; |
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use Cmp\Queues\Domain\Queue\QueueReader; |
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use Psr\Log\LoggerInterface; |
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class Subscriber |
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{ |
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/** |
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* @var QueueReader |
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*/ |
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protected $queueReader; |
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/** |
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* @var LoggerInterface |
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*/ |
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protected $logger; |
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/** |
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* @var EventSubscriptor[] |
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*/ |
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protected $subscriptors = []; |
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/** |
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* Subscriber constructor. |
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* @param QueueReader $queueReader |
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* @param LoggerInterface $logger |
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*/ |
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public function __construct(QueueReader $queueReader, LoggerInterface $logger) |
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{ |
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$this->queueReader = $queueReader; |
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$this->logger = $logger; |
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} |
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/** |
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* @param EventSubscriptor $eventSubscriptor |
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* @return $this |
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*/ |
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public function subscribe(EventSubscriptor $eventSubscriptor) |
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{ |
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$this->subscriptors[] = $eventSubscriptor; |
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return $this; |
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} |
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/** |
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* @param int $timeout |
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* @throws DomainEventException |
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* @throws \Cmp\Queues\Domain\Queue\Exception\ReaderException |
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*/ |
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public function start($timeout=0) |
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{ |
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$this->checkHasSubscriptors(); |
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while(true) { |
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try { |
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$this->queueReader->read(array($this, 'notify'), $timeout); |
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} catch(TimeoutReaderException $e) { |
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break; |
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} catch(GracefulStopException $e) { |
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break; |
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} |
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} |
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} |
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/** |
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* @param int $timeout |
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* @throws DomainEventException |
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* @throws \Cmp\Queues\Domain\Queue\Exception\ReaderException |
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*/ |
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public function batch($timeout=0) |
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{ |
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$this->checkHasSubscriptors(); |
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$this->queueReader->read(array($this, 'notify'), $timeout); |
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} |
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/** |
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* @param DomainEvent $domainEvent |
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*/ |
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public function notify(DomainEvent $domainEvent) |
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{ |
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$this->logger->debug('Domain Event received, notifying subscribers'); |
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foreach($this->subscriptors as $subscriptor) { |
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if($subscriptor->isSubscribed($domainEvent)) { |
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$subscriptor->notify($domainEvent); |
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} |
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} |
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} |
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/** |
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* @return EventSubscriptor[] |
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*/ |
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public function getSubscriptors() |
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{ |
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return $this->subscriptors; |
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} |
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/** |
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* @throws DomainEventException |
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*/ |
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private function checkHasSubscriptors() |
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{ |
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if(empty($this->getSubscriptors())) { |
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throw new DomainEventException('You must add at least 1 EventSubscriptor in order to publish start reading from queue.'); |
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} |
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} |
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} |
CMProductions /
queues
