/**
* @inheritdoc
*/
public function listen($queue, callable $callback, array $options = [])
{
$options = array_merge($this->defaultConfig['listener'], $options);
$connectionConfig = $this->getConfig('connection', $this->config['queues'][$queue]['connection']);
$ackAt = isset($options['multi_ack']) ? ceil($connectionConfig['prefetch_count'] / 2) : 0;
try {
$queue = $this->getQueue($queue);
$acknowledged = 0;
$queue->consume(\Closure::bind(function (\AMQPEnvelope $envelope) use($callback, $queue, $ackAt, &$acknowledged) {
$result = new Message\Result();
call_user_func($callback, Helper\Message::convert($envelope), $result);
if ($result->getStatus()) {
if ($ackAt > 1) {
if (0 == ++$acknowledged % $ackAt) {
$queue->ack($envelope->getDeliveryTag(), AMQP_MULTIPLE);
}
} else {
$queue->ack($envelope->getDeliveryTag());
}
} else {
$queue->nack($envelope->getDeliveryTag(), $result->isRequeue() ? AMQP_REQUEUE : AMQP_NOPARAM);
}
if ($result->isStop()) {
return false;
}
}, $this), Helper\Options::toFlags($options));
} catch (\Exception $e) {
throw Helper\Exception::convert($e);
}
}
