Enum QoS 

pub enum QoS {
    AtMostOnce = 0,
    AtLeastOnce = 1,
    ExactlyOnce = 2,
}

Quality of Service level enumeration and functionality Represents the Quality of Service (QoS) levels in MQTT.

Variants

AtMostOnce = 0

QoS level 0: At most once delivery (Fire and Forget).

The message is delivered according to the best efforts of the underlying network. No acknowledgment is sent, and the message is not stored or re-transmitted.

AtLeastOnce = 1

QoS level 1: At least once delivery (Acknowledged Delivery).

The message is assured to arrive but may arrive more than once.

ExactlyOnce = 2

QoS level 2: Exactly once delivery (Assured Delivery).

The message is assured to arrive exactly once.

Trait Implementations

impl Clone for QoS

fn clone(&self) -> QoS

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for QoS

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl From<QoS> for u8

fn from(value: QoS) -> Self

Converts the QoS enum into its corresponding numeric value.

Examples

use mqute_codec::protocol::QoS;

let qos = QoS::ExactlyOnce;
let value: u8 = qos.into();
assert_eq!(value, 2);

impl PartialEq for QoS

fn eq(&self, other: &QoS) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for QoS

fn partial_cmp(&self, other: &QoS) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl TryFrom<u8> for QoS

fn try_from(value: u8) -> Result<Self, Self::Error>

Attempts to convert a numeric value into a QoS enum.

Errors

Returns an Error::InvalidQos if the value is not a valid QoS level.

Examples

use mqute_codec::protocol::QoS;
use mqute_codec::Error;

let qos = QoS::try_from(1).unwrap();
assert_eq!(qos, QoS::AtLeastOnce);

let result = QoS::try_from(3);
assert!(result.is_err());

type Error = Error

The type returned in the event of a conversion error.

impl Copy for QoS

impl Eq for QoS

impl StructuralPartialEq for QoS