Enum QoS 

#[repr(u8)]
pub enum QoS {
    AtMostOnce = 0,
    AtLeastOnce = 1,
    ExactlyOnce = 2,
}

Quality of service that defines delivery guarantee level.

MQTT protocol defines three quality of service levels:

• 0 – at least once; no delivery guarantee.
• 1 – at most once; guaranteed to deliver but duplicates may arrive.
• 2 – exactly once; guaranteed to deliver only once.

The more the level – the more the performance overhead.

svc-agent sets QoS = 0 for outgoing events and responses and QoS = 1 for outgoing requests. This means that only requests are guaranteed to be delivered to the broker but duplicates are possible so maintaining request idempotency is up to agents. Quality of service

Variants

AtMostOnce = 0

AtLeastOnce = 1

ExactlyOnce = 2

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<(), Error>

Formats the value using the given formatter.

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 Copy for QoS

impl Eq for QoS

impl StructuralPartialEq for QoS