Enum svc_agent::mqtt::QoS

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

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

AtLeastOnce

ExactlyOnce

Trait Implementations

impl Clone for QoS

fn clone(&self) -> QoS

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for QoS

impl Debug for QoS

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

Formats the value using the given formatter.

impl Eq for QoS

impl PartialEq<QoS> for QoS

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

This method tests for self and other values to be equal, and is used by ==.

#[must_use]fn ne(&self, other: &Rhs) -> bool

This method tests for !=.

impl PartialOrd<QoS> for QoS

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

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

#[must_use]fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator.

#[must_use]fn le(&self, other: &Rhs) -> bool

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

#[must_use]fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator.

#[must_use]fn ge(&self, other: &Rhs) -> bool

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