Struct SeatUpdate 

pub struct SeatUpdate {
    pub seq: Option<u64>,
    pub update: Arc<SessionUpdate>,
}

One frame on the stream: the update, and the number the seat’s own counter minted for it.

The number is what makes a miss detectable. Every frame the workspace emits for a seat is numbered on that seat’s counter - whichever site emitted it - so a client that reads 5 and then 7 knows exactly one frame went missing and can ask for it. seq is None for a frame belonging to no seat, which rides the stream without joining any sequence.

Fields

seq: Option<u64>

update: Arc<SessionUpdate>

Shared rather than owned, so one delivery is one pointer. A frame goes to every subscriber of the fleet, and each of them filters it afterwards - so a deep clone per subscriber paid for a payload most of them drop. The ring holds the same pointer.

Trait Implementations

impl Clone for SeatUpdate

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SeatUpdate

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

Formats the value using the given formatter.