Enum EventDelivery 

#[non_exhaustive]
pub enum EventDelivery {
    Concurrent,
    Ordered {
        capacity: usize,
    },
}

How a bot’s registered callbacks receive events off the core event bus.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Concurrent

Each event is delivered to each interested callback on its own spawned task (default). A slow callback stalls neither the bus nor its siblings, but ordering across events is not guaranteed and a persistently slow consumer can accumulate unbounded in-flight tasks.

Ordered

Events are delivered to the callbacks strictly in arrival order through a single bounded mailbox drained by one task — the ordered messages.upsert contract used by interoperable clients. Bounds memory: when the mailbox is full the event is dropped and counted in StatsSnapshot::events_dropped instead of blocking the receive pipeline or growing without limit. Register an inbound durability hook when no drop is acceptable (at-least-once via redelivery).

Fields

capacity: usize

Mailbox capacity — events buffered before drops begin. Clamped to ≥1.

Trait Implementations

impl Clone for EventDelivery

fn clone(&self) -> EventDelivery

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for EventDelivery

impl Debug for EventDelivery

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

Formats the value using the given formatter.

impl Default for EventDelivery

fn default() -> EventDelivery

Returns the “default value” for a type.