Struct Subscription 

pub struct Subscription<'a> {
    pub filter: &'a TopicFilter,
    pub options: SubscriptionOptions,
    pub subscription_id: Option<u32>,
}

A stored subscription, passed to the iteration callback.

Subscriptions are recorded so the client can re-issue them after a session loss (CONNACK with Session Present = 0). The MQTT v5 Subscription Identifier (§3.8.2.1.2) is preserved verbatim so that matching PUBLISH packets continue to carry the same identifier the application originally chose.

Fields

filter: &'a TopicFilter

Topic filter the subscription is registered against.

options: SubscriptionOptions

MQTT v5 subscription options byte (§3.8.3.1).

subscription_id: Option<u32>

MQTT v5 subscription identifier (§3.8.2.1.2), if any.

None if the original SUBSCRIBE did not carry an identifier. Otherwise a value in the range 1..=268_435_455 as required by the spec.

Trait Implementations

impl<'a> Clone for Subscription<'a>

fn clone(&self) -> Subscription<'a>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for Subscription<'a>

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

Formats the value using the given formatter.

impl<'a> PartialEq for Subscription<'a>

fn eq(&self, other: &Subscription<'a>) -> 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<'a> Copy for Subscription<'a>

impl<'a> Eq for Subscription<'a>

impl<'a> StructuralPartialEq for Subscription<'a>