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<?php |
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namespace Fatindeed\GitlabWebhookHandler; |
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use Exception, SplSubject, SplObserver, SplObjectStorage; |
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use Psr\Log\LoggerAwareTrait; |
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use Psr\Log\LoggerInterface; |
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use Interop\Queue\Context; |
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use TimoReymann\GitlabWebhookLibrary\Specification\Event; |
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/** |
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* @see https://www.php.net/manual/zh/class.splsubject.php |
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*/ |
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class EventSubject implements SplSubject |
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{ |
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use LoggerAwareTrait, SignalHandler; |
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/** |
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* @var \SplObjectStorage |
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*/ |
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private $observers; |
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/** |
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* @var \TimoReymann\GitlabWebhookLibrary\Specification\Event |
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*/ |
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private $event; |
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/** |
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* @var bool |
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*/ |
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private $loop = true; |
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const DEFAULT_QUEUE_NAME = 'gitlab-webhook-queue'; |
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/** |
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* @param \Psr\Log\LoggerInterface $logger |
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*/ |
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public function __construct(LoggerInterface $logger = null) |
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{ |
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$this->observers = new SplObjectStorage; |
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$this->setLogger($logger ?? new NullLogger); |
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} |
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/** |
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* Attach an SplObserver |
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* |
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* @param \SplObserver $observer |
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* @return void |
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*/ |
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public function attach(SplObserver $observer): void |
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{ |
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$this->observers->attach($observer); |
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} |
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/** |
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* Detach an observer |
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* |
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* @param \SplObserver $observer |
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* @return void |
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*/ |
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public function detach(SplObserver $observer): void |
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{ |
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$this->observers->detach($observer); |
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} |
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/** |
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* Returns the number of observers in the storage |
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* |
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* @return int |
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*/ |
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public function count(): int |
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{ |
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return $this->observers->count(); |
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} |
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/** |
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* Notify an observer |
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* |
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* @return void |
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*/ |
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public function notify(): void |
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{ |
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foreach ($this->observers as $observer) { |
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try { |
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$observer->update($this); |
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} catch (Exception $e) { |
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$this->logger->error(get_class($observer).': '.$e->getMessage()); |
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} |
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} |
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} |
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/** |
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* Get event |
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* |
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* @return \TimoReymann\GitlabWebhookLibrary\Specification\Event|null |
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*/ |
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public function getEvent(): ?Event |
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{ |
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return $this->event; |
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} |
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/** |
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* Set event |
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* |
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* @param \TimoReymann\GitlabWebhookLibrary\Specification\Event $event |
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* @return void |
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*/ |
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public function setEvent(Event $event): void |
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{ |
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$this->event = $event; |
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} |
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/** |
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* Dispatch event |
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* |
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* @param \TimoReymann\GitlabWebhookLibrary\Specification\Event $event |
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* @param \Interop\Queue\Context|null $context |
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* @return void |
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*/ |
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public function dispatch(Event $event, ?Context $context = null): void |
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{ |
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if ($context) { |
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$queue = $context->createQueue($_ENV['QUEUE_NAME'] ?? self::DEFAULT_QUEUE_NAME); |
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$message = $context->createMessage(serialize($event)); |
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$context->createProducer()->send($queue, $message); |
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} else { |
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$this->setEvent($event); |
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$this->notify(); |
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} |
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} |
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/** |
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* Run infinite loop |
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* |
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* @param \Interop\Queue\Context $context |
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* @return void |
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*/ |
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public function run(Context $context): void |
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{ |
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$queue = $context->createQueue($_ENV['QUEUE_NAME'] ?? self::DEFAULT_QUEUE_NAME); |
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$consumer = $context->createConsumer($queue); |
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while ($this->loop) { |
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try { |
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$message = $consumer->receive(5000); |
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if ($message) { |
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$event = unserialize($message->getBody()); |
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$this->dispatch($event); |
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$consumer->acknowledge($message); |
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} |
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} catch (Exception $e) { |
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$this->logger->error($e->getMessage()); |
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} |
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$this->signalDispatch(); |
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} |
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} |
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/** |
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* SIGTERM signal handler |
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* |
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* @param int $signo |
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* @return void |
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*/ |
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public function terminate(int $signo): void |
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{ |
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$this->logger->info('Gitlab webhook handler terminated on signal #'.$signo.'.'); |
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$this->loop = false; |
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} |
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} |
fatindeed /
gitlab-webhook-handler
