/**
* Registers the gearman queues where the worker has to listen on.
* The given callback has to transform the workload into a RequestMessage object.
*
* @param string $callbackName
* @param callable $workloadToMessageCallback The return value of
*/
public function listenOn($callbackName, callable $workloadToMessageCallback)
{
$this->addCallback($callbackName, function ($job) use($workloadToMessageCallback) {
$message = call_user_func($workloadToMessageCallback, $job->workload());
if ($message instanceof RequestMessageInterface) {
if ($this->verbose) {
$this->logger->debug("Sending message to queue: " . (string) $message);
}
$this->metrics->increment('message');
$this->client->message($message);
} else {
throw new \Exception("Invalid return type.");
}
});
}
