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<?php declare(strict_types=1); |
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namespace Initx\Driver; |
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use Aws\Result; |
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use Aws\Sqs\SqsClient; |
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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 Ramsey\Uuid\Uuid; |
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class SqsQueue implements Queue |
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{ |
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use HasFallbackSerializer; |
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/** |
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* @var SqsClient |
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*/ |
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private $client; |
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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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* @var string |
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*/ |
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private $queueUrl; |
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/** |
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* @var SerializerInterface |
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*/ |
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private $serializer; |
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public function __construct(SqsClient $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 = $serializer; |
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$this->fallbackSerializer(); |
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} |
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public function add(Envelope $envelope): void |
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{ |
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if (!$this->offer($envelope)) { |
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throw new IllegalStateException("Could not add to queue $this->queueName"); |
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} |
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} |
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public function offer(Envelope $envelope): bool |
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{ |
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$this->resolveQueueUrl(); |
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$serialized = $this->serializer->serialize($envelope, 'json'); |
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$args = [ |
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'QueueUrl' => $this->queueUrl, |
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'MessageBody' => $serialized, |
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]; |
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if ($this->isFifo()) { |
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$args['MessageGroupId'] = __CLASS__; |
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$args['MessageDeduplicationId'] = Uuid::uuid4()->toString(); |
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} |
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$result = $this->client->sendMessage($args); |
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return $result ? true : false; |
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} |
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public function remove(): Envelope |
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{ |
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$envelope = $this->poll(); |
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if (!$envelope) { |
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throw new NoSuchElementException(); |
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} |
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return $envelope; |
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} |
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public function poll(): ?Envelope |
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{ |
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$this->resolveQueueUrl(); |
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$result = $this->queryForOneMessage(); |
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if ($result->get('Messages') && count($result->get('Messages'))) { |
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$message = $result->get('Messages')[0]; |
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$envelope = $this->serializer->deserialize($message['Body'], Envelope::class, 'json'); |
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// remove message from queue |
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$this->client->deleteMessage([ |
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'QueueUrl' => $this->queueUrl, |
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'ReceiptHandle' => $message['ReceiptHandle'], |
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]); |
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return $envelope; |
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} |
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// no messages |
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return null; |
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} |
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public function element(): Envelope |
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{ |
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$envelope = $this->peek(); |
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if (!$envelope) { |
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throw new NoSuchElementException(); |
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} |
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return $envelope; |
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} |
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public function peek(): ?Envelope |
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{ |
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$this->resolveQueueUrl(); |
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$result = $this->queryForOneMessage(); |
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if ($result->get('Messages') && count($result->get('Messages'))) { |
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$message = $result->get('Messages')[0]; |
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$envelope = $this->serializer->deserialize($message['Body'], Envelope::class, 'json'); |
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return $envelope; |
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} |
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// no messages |
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return null; |
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} |
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private function resolveQueueUrl(): void |
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{ |
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if ($this->queueUrl === null) { |
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$result = $this->client->getQueueUrl(['QueueName' => $this->queueName]); |
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if (!$result || !$this->queueUrl = $result->get('QueueUrl')) { |
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throw new IllegalStateException("Could not resolve queue url from queue name '{$this->queueName}'"); |
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} |
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} |
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} |
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private function queryForOneMessage(): Result |
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{ |
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return $this->client->receiveMessage([ |
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'MaxNumberOfMessages' => 1, |
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'QueueUrl' => $this->queueUrl, |
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]); |
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} |
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private function isFifo(): bool |
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{ |
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return $this->endsWith($this->queueName, '.fifo'); |
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} |
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private function endsWith(string $haystack, string $needle): bool |
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{ |
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$length = strlen($needle); |
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return (substr($haystack, -$length) === $needle); |
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} |
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} |
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