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<?php
/**
* Copyright © Magento, Inc. All rights reserved.
* See COPYING.txt for license details.
*/
namespace Magento\Framework\MessageQueue;
use Exception;
use Magento\Framework\App\ObjectManager;
use Magento\Framework\App\ResourceConnection;
use Magento\Framework\Communication\ConfigInterface as CommunicationConfig;
use Magento\Framework\Exception\LocalizedException;
use Magento\Framework\Exception\NotFoundException;
use Magento\Framework\MessageQueue\Consumer\ConfigInterface as ConsumerConfig;
use Magento\Framework\Phrase;
use Psr\Log\LoggerInterface;
/**
* Class Consumer used to process a single message, unlike batch consumer.
*
* This could be used for both synchronous and asynchronous processing, depending on topic.
*
* @SuppressWarnings(PHPMD.CouplingBetweenObjects)
*/
class Consumer implements ConsumerInterface
{
/**
* @var ConsumerConfigurationInterface
*/
private $configuration;
/**
* @var ResourceConnection
*/
private $resource;
/**
* @var MessageEncoder
*/
private $messageEncoder;
/**
* @var CallbackInvokerInterface
*/
private $invoker;
/**
* @var MessageController
*/
private $messageController;
/**
* @var QueueRepository
*/
private $queueRepository;
/**
* @var EnvelopeFactory
*/
private $envelopeFactory;
/**
* @var MessageValidator
*/
private $messageValidator;
/**
* @var ConsumerConfig
*/
private $consumerConfig;
/**
* @var CommunicationConfig
*/
private $communicationConfig;
/**
* @var LoggerInterface
*/
private $logger;
/**
* Initialize dependencies.
*
* @param CallbackInvokerInterface $invoker
* @param MessageEncoder $messageEncoder
* @param ResourceConnection $resource
* @param ConsumerConfigurationInterface $configuration
* @param LoggerInterface|null $logger
* @param ConsumerConfig|null $consumerConfig
* @param CommunicationConfig|null $communicationConfig
* @param QueueRepository|null $queueRepository
* @param MessageController|null $messageController
* @param MessageValidator|null $messageValidator
* @param EnvelopeFactory|null $envelopeFactory
* @SuppressWarnings(PHPMD.ExcessiveParameterList)
*/
public function __construct(
CallbackInvokerInterface $invoker,
MessageEncoder $messageEncoder,
ResourceConnection $resource,
ConsumerConfigurationInterface $configuration,
LoggerInterface $logger = null,
ConsumerConfig $consumerConfig = null,
CommunicationConfig $communicationConfig = null,
QueueRepository $queueRepository = null,
MessageController $messageController = null,
MessageValidator $messageValidator = null,
EnvelopeFactory $envelopeFactory = null
) {
$this->invoker = $invoker;
$this->messageEncoder = $messageEncoder;
$this->resource = $resource;
$this->configuration = $configuration;
$this->logger = $logger ?: ObjectManager::getInstance()->get(LoggerInterface::class);
$this->consumerConfig = $consumerConfig ?: ObjectManager::getInstance()->get(ConsumerConfig::class);
$this->communicationConfig = $communicationConfig
?: ObjectManager::getInstance()->get(CommunicationConfig::class);
$this->queueRepository = $queueRepository ?: ObjectManager::getInstance()->get(QueueRepository::class);
$this->messageController = $messageController ?: ObjectManager::getInstance()->get(MessageController::class);
$this->messageValidator = $messageValidator ?: ObjectManager::getInstance()->get(MessageValidator::class);
$this->envelopeFactory = $envelopeFactory ?: ObjectManager::getInstance()->get(EnvelopeFactory::class);
}
/**
* @inheritdoc
*/
public function process($maxNumberOfMessages = null)
{
$queue = $this->configuration->getQueue();
$maxIdleTime = $this->configuration->getMaxIdleTime();
$sleep = $this->configuration->getSleep();
if (!isset($maxNumberOfMessages)) {
$queue->subscribe($this->getTransactionCallback($queue));
} else {
$this->invoker->invoke(
$queue,
$maxNumberOfMessages,
$this->getTransactionCallback($queue),
$maxIdleTime,
$sleep
);
}
}
/**
* Decode message and invoke callback method, return reply back for sync processing.
*
* @param EnvelopeInterface $message
* @param boolean $isSync
* @return string|null
* @throws LocalizedException
*/
private function dispatchMessage(EnvelopeInterface $message, $isSync = false)
{
$properties = $message->getProperties();
$topicName = $properties['topic_name'];
$handlers = $this->configuration->getHandlers($topicName);
$decodedMessage = $this->messageEncoder->decode($topicName, $message->getBody());
if (isset($decodedMessage)) {
$messageSchemaType = $this->configuration->getMessageSchemaType($topicName);
if ($messageSchemaType == CommunicationConfig::TOPIC_REQUEST_TYPE_METHOD) {
foreach ($handlers as $callback) {
// The `array_values` is a workaround to ensure the same behavior in PHP 7 and 8.
$result = call_user_func_array($callback, array_values($decodedMessage));
return $this->processSyncResponse($topicName, $result);
}
} else {
foreach ($handlers as $callback) {
$result = call_user_func($callback, $decodedMessage);
if ($isSync) {
return $this->processSyncResponse($topicName, $result);
}
}
}
}
return null;
}
/**
* Validate and encode synchronous handler output.
*
* @param string $topicName
* @param mixed $result
* @return string
* @throws LocalizedException
*/
private function processSyncResponse($topicName, $result)
{
if (isset($result)) {
$this->messageValidator->validate($topicName, $result, false);
return $this->messageEncoder->encode($topicName, $result, false);
} else {
throw new LocalizedException(new Phrase('No reply message resulted in RPC.'));
}
}
/**
* Send RPC response message.
*
* @param EnvelopeInterface $envelope
*
* @return void
* @throws LocalizedException
*/
private function sendResponse(EnvelopeInterface $envelope)
{
$messageProperties = $envelope->getProperties();
$connectionName = $this->consumerConfig->getConsumer($this->configuration->getConsumerName())->getConnection();
$queue = $this->queueRepository->get($connectionName, $messageProperties['reply_to']);
$queue->push($envelope);
}
/**
* Get transaction callback. This handles the case of both sync and async.
*
* @param QueueInterface $queue
* @return \Closure
*/
private function getTransactionCallback(QueueInterface $queue)
{
return function (EnvelopeInterface $message) use ($queue) {
/** @var LockInterface $lock */
$lock = null;
try {
$topicName = $message->getProperties()['topic_name'];
$topicConfig = $this->communicationConfig->getTopic($topicName);
$lock = $this->messageController->lock($message, $this->configuration->getConsumerName());
if ($topicConfig[CommunicationConfig::TOPIC_IS_SYNCHRONOUS]) {
$responseBody = $this->dispatchMessage($message, true);
$responseMessage = $this->envelopeFactory->create(
['body' => $responseBody, 'properties' => $message->getProperties()]
);
$this->sendResponse($responseMessage);
} else {
$allowedTopics = $this->configuration->getTopicNames();
if (in_array($topicName, $allowedTopics)) {
$this->dispatchMessage($message);
} else {
$queue->reject($message);
return;
}
}
$queue->acknowledge($message);
} catch (MessageLockException $exception) {
$queue->acknowledge($message);
} catch (ConnectionLostException $exception) {
if ($lock) {
$this->resource->getConnection()->delete(
$this->resource->getTableName('queue_lock'),
['id = ?' => $lock->getId()]
);
}
} catch (NotFoundException $exception) {
$queue->acknowledge($message);
$this->logger->warning($exception->getMessage());
} catch (Exception $exception) {
$queue->reject($message, false, $exception->getMessage());
if ($lock) {
$this->resource->getConnection()->delete(
$this->resource->getTableName('queue_lock'),
['id = ?' => $lock->getId()]
);
}
}
};
}
}