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<?php
declare(strict_types=1);
namespace unreal4u\MQTT\DataTypes;
use unreal4u\MQTT\Exceptions\InvalidQoSLevel;
/**
* This Value Object will always contain a valid QoS level.
*/
final class QoSLevel
{
* This field indicates the level of assurance for delivery of an Application Message. Can be 0, 1 or 2
*
* 0: At most once delivery (default)
* 1: At least once delivery
* 2: Exactly once delivery
* @var int
private $qosLevel = 0;
* QoSLevel constructor.
* @param int $QoSLevel
* @throws \unreal4u\MQTT\Exceptions\InvalidQoSLevel
public function __construct(int $QoSLevel = 0)
if ($QoSLevel > 2 || $QoSLevel < 0) {
throw new InvalidQoSLevel(sprintf(
'The provided QoS level is invalid. Valid values are 0, 1 and 2 (Provided: %d)',
$QoSLevel
));
}
* Gets the current QoS level
* @return int
public function getQoSLevel(): int
return $this->qosLevel;
unreal4u /
mqtt
