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<?php |
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declare(strict_types=1); |
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namespace Werkspot\MessageQueue\DeliveryQueue\Amqp; |
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use PhpAmqpLib\Channel\AMQPChannel; |
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use PhpAmqpLib\Connection\AMQPLazyConnection; |
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use PhpAmqpLib\Wire\AMQPTable; |
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use Psr\Log\LoggerInterface; |
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use Psr\Log\NullLogger; |
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use RuntimeException; |
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use Werkspot\MessageQueue\DeliveryQueue\ConsumerInterface; |
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final class AmqpConsumer implements ConsumerInterface |
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{ |
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/** |
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* @var AMQPLazyConnection |
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*/ |
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private $connection; |
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/** |
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* @var AMQPChannel |
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*/ |
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private $channel; |
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/** |
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* @var AmqpMessageHandlerInterface |
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*/ |
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private $handler; |
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/** |
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* @var bool |
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*/ |
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private $exitSignalReceived = false; |
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/** |
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* @var LoggerInterface |
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*/ |
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private $logger; |
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/** |
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* Setup signals and connection |
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*/ |
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public function __construct( |
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AMQPLazyConnection $connection, |
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AmqpMessageHandlerInterface $handler, |
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LoggerInterface $logger = null |
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) { |
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3 |
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if (extension_loaded('pcntl')) { |
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3 |
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if (!defined('AMQP_WITHOUT_SIGNALS')) { |
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1 |
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define('AMQP_WITHOUT_SIGNALS', false); |
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} |
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pcntl_signal(SIGTERM, [$this, 'signalHandler']); |
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3 |
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pcntl_signal(SIGHUP, [$this, 'signalHandler']); |
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3 |
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pcntl_signal(SIGINT, [$this, 'signalHandler']); |
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3 |
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pcntl_signal(SIGQUIT, [$this, 'signalHandler']); |
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3 |
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pcntl_signal(SIGUSR1, [$this, 'signalHandler']); |
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pcntl_signal(SIGUSR2, [$this, 'signalHandler']); |
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} else { |
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throw new RuntimeException('Unable to process signals'); |
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} |
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3 |
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$this->connection = $connection; |
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3 |
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$this->handler = $handler; |
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3 |
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$this->logger = $logger ?? new NullLogger(); |
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3 |
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} |
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public function signalHandler(int $signalNumber): void |
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{ |
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switch ($signalNumber) { |
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case SIGTERM: // 15 : supervisor default stop |
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case SIGQUIT: // 3 : kill -s QUIT |
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case SIGINT: // 2 : ctrl+c |
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case SIGHUP: // 1 : kill -s HUP |
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// We COULD always do a $this->channel->close() here, but that would result in the channel being closed, |
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// rabbit not receiving the ack and so it will try it again. But the problem with this is that there |
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// could have been a command halfway processing, or even worse, just done processing, in that case, |
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// we'do do the command again, basically executing it twice. So it's better to just wait, and finish |
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// the current/next command, and stop after that |
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$this->exitSignalReceived = true; |
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// But if we're just waiting and not doing anything of/c we can close now |
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if (!$this->handler->isHandlingMessage()) { |
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$this->connection->close(); |
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} |
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break; |
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default: |
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// Some unknown event... idk what to do? probably not exit... but yeah what then? ... let's just pretend |
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// it didn't happen >< |
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$this->logger->warning('Got unhandled signal: ' . $signalNumber); |
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break; |
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} |
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} |
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3 |
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public function startConsuming(string $queueName, int $maxSeconds): void |
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{ |
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3 |
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$start = time(); |
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$this->channel = $this->connection->channel(); |
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// Make sure we get messages 1-by-1 so rabbitmq-server can distribute the work properly and implement |
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// the priority properly |
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$this->channel->basic_qos(0, 1, true); |
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1 |
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$this->channel->basic_consume( |
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$queueName, |
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'', |
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false, |
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false, |
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false, |
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false, |
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[$this->handler, 'handle'], |
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null, |
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new AMQPTable(array( |
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"x-max-priority" => 10 |
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)) |
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); |
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1 |
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while (count($this->channel->callbacks) && !$this->exitSignalReceived) { |
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// Wait for the next message to arrive and process it |
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$this->channel->wait(); |
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1 |
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if (time() > ($start + $maxSeconds)) { |
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break; |
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} |
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} |
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1 |
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} |
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} |
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Werkspot /
message-queue
