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<?php declare(strict_types=1); |
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namespace Initx\Driver; |
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use Initx\Envelope; |
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use Initx\Exception\IllegalStateException; |
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use Initx\Exception\NoSuchElementException; |
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use Initx\Queue; |
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use JMS\Serializer\SerializerInterface; |
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use Pheanstalk\Contract\PheanstalkInterface; |
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/** |
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* Class BeanstalkdQueue |
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* |
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* @package Initx\Driver |
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*/ |
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final class BeanstalkdQueue implements Queue |
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{ |
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use HasFallbackSerializer; |
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/** |
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* @var PheanstalkInterface |
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*/ |
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private $client; |
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/** |
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* @var SerializerInterface |
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*/ |
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private $serializer; |
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/** |
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* @var string |
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*/ |
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private $queueName; |
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/** |
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* BeanstalkdQueue constructor. |
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* |
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* @param PheanstalkInterface $client |
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* @param string $queueName |
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* @param SerializerInterface|null $serializer |
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*/ |
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public function __construct( |
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PheanstalkInterface $client, |
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string $queueName = PheanstalkInterface::DEFAULT_TUBE, |
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?SerializerInterface $serializer = null |
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) { |
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$this->client = $client; |
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$this->queueName = $queueName; |
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$this->serializer = $this->fallbackSerializer($serializer); |
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} |
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/** |
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* Inserts an element if possible, otherwise throwing exception. |
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* |
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* @param Envelope $envelope |
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* @return bool |
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* @throws IllegalStateException |
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*/ |
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public function add(Envelope $envelope): bool |
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{ |
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if (!$this->offer($envelope)) { |
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throw new IllegalStateException('Could not write to redis'); |
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} |
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return true; |
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} |
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/** |
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* Inserts an element if possible, otherwise returning false. |
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* |
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* @param Envelope $envelope |
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* @return bool |
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*/ |
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public function offer(Envelope $envelope): bool |
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{ |
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$serialized = $this->serializer->serialize($envelope, 'json'); |
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return (bool)$this->client |
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->useTube($this->queueName) |
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->put($serialized); |
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} |
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/** |
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* Remove and return head of queue, otherwise throwing exception. |
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* |
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* @return Envelope |
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* @throws NoSuchElementException |
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*/ |
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public function remove(): Envelope |
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{ |
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$element = $this->poll(); |
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if (!$element) { |
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throw new NoSuchElementException(); |
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} |
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return $element; |
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} |
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/** |
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* Remove and return head of queue, otherwise returning null. |
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* |
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* @return Envelope | null |
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*/ |
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public function poll(): ?Envelope |
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{ |
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$job = $this->client |
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->watch($this->queueName) |
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->reserveWithTimeout(0); |
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if (empty($job)) { |
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return null; |
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} |
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$serialized = $job->getData(); |
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if (empty($serialized)) { |
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return null; |
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} |
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return $this->serializer->deserialize($serialized, Envelope::class, 'json'); |
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} |
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/** |
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* Return but do not remove head of queue, otherwise throwing exception. |
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* |
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* @return Envelope |
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* @throws NoSuchElementException |
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*/ |
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public function element(): Envelope |
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{ |
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$element = $this->peek(); |
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if (!$element) { |
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throw new NoSuchElementException(); |
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} |
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return $element; |
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} |
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/** |
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* Return but do not remove head of queue, otherwise returning null. |
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* |
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* @return Envelope | null |
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*/ |
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public function peek(): ?Envelope |
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{ |
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$job = $this->client |
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->watch($this->queueName) |
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->peekReady(); |
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if (empty($job)) { |
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return null; |
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} |
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$serialized = $job->getData(); |
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if (empty($serialized)) { |
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return null; |
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} |
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return $this->serializer->deserialize($serialized, Envelope::class, 'json'); |
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} |
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} |
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initx /
querabilis
