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TopicLease

xmtp_api_backend::queries

Struct TopicLease 

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pub struct TopicLease<B: TransportBinding>
where
    B::GroupMessage: Clone,
    B::WelcomeMessage: Clone,
{ /* private fields */ }
Expand description

Local topic interest. Dropping the handle removes its interest immediately.

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impl<B: TransportBinding> TopicLease<B>
where B::GroupMessage: Clone, B::WelcomeMessage: Clone,

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pub async fn next(&mut self) -> Option<LeaseEvent<B>>

Read the next event. A closed channel requires recovery from storage.

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pub fn topics(&self) -> &[Topic]

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pub async fn next_incoming( &mut self, ) -> Option<Result<IncomingEvent, TransportError>>

Read raw ordered events, including a terminal receive-capacity error.

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pub fn acknowledge_received(&self, cursors: TopicCursor)

Call this only after the supplied positions commit to local storage.

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pub fn into_incoming_subscription(self) -> IncomingSubscription<TransportError>

Keep this lease alive until its owned event stream is dropped.

Trait Implementations§

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impl<B: TransportBinding> Drop for TopicLease<B>
where B::GroupMessage: Clone, B::WelcomeMessage: Clone,

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fn drop(&mut self)

Executes the destructor for this type. Read more
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fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)
Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned. Read more

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impl<T> AggregateExpressionMethods for T

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fn aggregate_distinct(self) -> Self::Output
where Self: DistinctDsl,

DISTINCT modifier for aggregate functions Read more
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where Self: AllDsl,

ALL modifier for aggregate functions Read more
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fn aggregate_filter<P>(self, f: P) -> Self::Output
where P: AsExpression<Bool>, Self: FilterDsl<<P as AsExpression<Bool>>::Expression>,

Add an aggregate function filter Read more
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fn aggregate_order<O>(self, o: O) -> Self::Output
where Self: OrderAggregateDsl<O>,

Add an aggregate function order Read more
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