public function start()
{
$packet = new PublishRequestPacket();
$packet->setTopic($this->message->getTopic());
$packet->setPayload($this->message->getPayload());
$packet->setRetained($this->message->isRetained());
$packet->setDuplicate($this->message->isDuplicate());
$packet->setQosLevel($this->message->getQosLevel());
if ($this->message->getQosLevel() === 0) {
$this->succeed($this->message);
} else {
$packet->setIdentifier($this->identifier);
}
return $packet;
}
