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<?php |
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namespace Cmp\Queues\Infrastructure\AWS\v20121105\Queue; |
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use Aws\Sqs\SqsClient; |
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use Cmp\Queues\Domain\Queue\Exception\GracefulStopException; |
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use Cmp\Queues\Domain\Queue\Exception\ReaderException; |
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use Cmp\Queues\Domain\Queue\Exception\TimeoutReaderException; |
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use Cmp\Queues\Domain\Task\Exception\ParseMessageException; |
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use Cmp\Queues\Domain\Queue\QueueReader as DomainQueueReader; |
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use Psr\Log\LoggerInterface; |
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class QueueReader implements DomainQueueReader |
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{ |
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/** |
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* @var SqsClient |
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*/ |
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protected $sqs; |
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/** |
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* @var string |
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*/ |
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protected $queueUrl; |
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/** |
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* @var int |
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*/ |
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protected $messagesToRead; |
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/** |
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* @var MessageHandler |
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*/ |
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protected $messageHandler; |
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/** |
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* @var LoggerInterface |
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*/ |
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protected $logger; |
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/** |
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* @param SqsClient $sqs |
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* @param string $queueUrl |
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* @param int $messagesToRead |
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* @param MessageHandler $messageHandler |
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* @param LoggerInterface $logger |
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*/ |
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public function __construct( |
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SqsClient $sqs, |
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$queueUrl, |
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$messagesToRead, |
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MessageHandler $messageHandler, |
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LoggerInterface $logger |
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) { |
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$this->sqs = $sqs; |
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$this->queueUrl = $queueUrl; |
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$this->messagesToRead = $messagesToRead; |
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$this->logger = $logger; |
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$this->messageHandler = $messageHandler; |
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} |
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/** |
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* @param callable $callback |
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* @param int $timeout |
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* |
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* @throws GracefulStopException |
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* @throws ParseMessageException |
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* @throws ReaderException |
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* @throws TimeoutReaderException |
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*/ |
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public function read(callable $callback, $timeout=0) |
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{ |
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$this->messageHandler->setCallback($callback); |
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try { |
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$this->consume($timeout); |
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} catch(ParseMessageException $e){ |
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throw $e; |
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} catch(GracefulStopException $e) { |
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$this->logger->info("Gracefully stopping the AWS queue reader", ["exception" => $e]); |
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throw $e; |
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} catch(TimeoutReaderException $e) { |
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throw $e; |
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} catch(\Exception $e) { |
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throw new ReaderException("Error occurred while reading", 0, $e); |
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} |
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} |
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/** |
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* Deletes all messages from the queue |
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*/ |
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public function purge() |
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{ |
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$this->sqs->purgeQueue([ |
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'QueueUrl' => $this->queueUrl, |
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]); |
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} |
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/** |
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* @param int $timeout |
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* |
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* @throws ReaderException |
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* @throws TimeoutReaderException |
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* @throws ParseMessageException |
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*/ |
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protected function consume($timeout) |
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{ |
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$result = $this->sqs->receiveMessage([ |
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'QueueUrl' => $this->queueUrl, |
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'MessageAttributeNames' => ['All'], |
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'MaxNumberOfMessages' => $this->messagesToRead, |
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'WaitTimeSeconds' => $timeout, |
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]); |
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if ($timeout != 0 && !isset($result['Messages'])) { |
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throw new TimeoutReaderException(); |
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} |
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$messages = isset($result['Messages']) ? $result['Messages'] : []; |
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foreach ($messages as $message) { |
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$response = $this->messageHandler->handleMessage($message); |
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if(is_null($response) || !is_bool($response) || $response) { |
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$this->sqs->deleteMessage(['QueueUrl' => $this->queueUrl, 'ReceiptHandle' => $message['ReceiptHandle']]); |
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} |
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} |
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} |
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} |
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CMProductions /
queues
