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<?php declare(strict_types=1); |
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namespace Initx\Querabilis\Driver; |
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use Initx\Querabilis\Envelope; |
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use Initx\Querabilis\Exception\IllegalStateException; |
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use Initx\Querabilis\Exception\NoSuchElementException; |
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use Initx\Querabilis\Queue; |
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use JMS\Serializer\SerializerInterface; |
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use Predis\ClientInterface; |
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use Throwable; |
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final class RedisQueue implements Queue |
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{ |
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use HasFallbackSerializer; |
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/** |
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* @var ClientInterface |
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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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public function __construct(ClientInterface $client, string $queueName, ?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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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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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)$this->client->rpush( |
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$this->queueName, |
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[$serialized] |
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); |
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} |
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public function remove(): Envelope |
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{ |
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$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 $element; |
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} |
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public function poll(): ?Envelope |
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{ |
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try { |
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$serialized = $this->client->lpop($this->queueName); |
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} catch (Throwable $e) { |
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throw new IllegalStateException("Predis connection error", 0, $e); |
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} |
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if (empty($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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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 $element; |
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} |
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public function peek(): ?Envelope |
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{ |
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$serialized = $this->client->lrange($this->queueName, 0, 0)[0]; |
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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
