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<?php |
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namespace TreeHouse\Queue\Consumer; |
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use Symfony\Component\EventDispatcher\EventDispatcher; |
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use Symfony\Component\EventDispatcher\EventDispatcherInterface; |
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use TreeHouse\Queue\Amqp\EnvelopeInterface; |
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use TreeHouse\Queue\Amqp\QueueInterface; |
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use TreeHouse\Queue\Event\ConsumeEvent; |
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use TreeHouse\Queue\Event\ConsumeExceptionEvent; |
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use TreeHouse\Queue\Processor\ProcessorInterface; |
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use TreeHouse\Queue\QueueEvents; |
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class Consumer implements ConsumerInterface |
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{ |
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/** |
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* @var QueueInterface |
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*/ |
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protected $queue; |
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/** |
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* @var ProcessorInterface |
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*/ |
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protected $processor; |
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/** |
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* @var EventDispatcherInterface |
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*/ |
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protected $dispatcher; |
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/** |
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* @var callable |
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*/ |
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protected $callback; |
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/** |
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* @var bool |
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*/ |
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protected $nackRequeue = false; |
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/** |
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* @param QueueInterface $queue |
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* @param ProcessorInterface $processor |
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* @param EventDispatcherInterface $dispatcher |
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*/ |
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public function __construct(QueueInterface $queue, ProcessorInterface $processor, EventDispatcherInterface $dispatcher = null) |
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{ |
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$this->queue = $queue; |
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$this->processor = $processor; |
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$this->dispatcher = $dispatcher ?: new EventDispatcher(); |
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$this->setCallback( |
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function (EnvelopeInterface $envelope) { |
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try { |
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$event = new ConsumeEvent($envelope); |
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$this->dispatcher->dispatch(QueueEvents::CONSUME_MESSAGE, $event); |
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$result = $this->processor->process($envelope); |
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$event->setResult($result); |
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$this->dispatcher->dispatch(QueueEvents::CONSUMED_MESSAGE, $event); |
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$this->ack($envelope); |
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return $result; |
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} catch (\Exception $exception) { |
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$this->dispatcher->dispatch(QueueEvents::CONSUME_EXCEPTION, new ConsumeExceptionEvent($envelope, $exception)); |
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$this->nack($envelope, $this->nackRequeue); |
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throw $exception; |
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} |
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} |
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); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function getEventDispatcher() |
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{ |
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return $this->dispatcher; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function setNackRequeue($requeue) |
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{ |
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$this->nackRequeue = $requeue; |
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} |
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/** |
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* @param callable $callback |
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*/ |
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public function setCallback(callable $callback) |
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{ |
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$this->callback = $callback; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function get() |
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{ |
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if (false === $envelope = $this->queue->get()) { |
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return null; |
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} |
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return $envelope; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function ack(EnvelopeInterface $envelope) |
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{ |
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$this->queue->ack($envelope->getDeliveryTag()); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function nack(EnvelopeInterface $envelope, $requeue = false) |
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{ |
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$this->queue->nack($envelope->getDeliveryTag(), $requeue ? QueueInterface::REQUEUE : null); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function consume($flags = QueueInterface::NOPARAM) |
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{ |
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$this->queue->consume($this->callback, $flags); |
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} |
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} |
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treehouselabs /
queue
