public function loop($infinite = true)
{
do {
$message = $this->messenger->next();
$pid = pcntl_fork();
if ($pid == -1) {
$this->shutdown();
exit(1);
} elseif ($pid > 0) {
pcntl_waitpid($pid, $status);
} else {
$this->onMessage($message);
exit(0);
}
} while ($infinite);
}