History-sink-type

HistorySink is the concrete synchronous sink returned by history_sink(...). It retains copied Record values in memory and implements Sink.

Interface

pub struct HistorySink {
  records : Ref[Array[Record]]
  capacity : Int
  dropped_count : Ref[Int]
}

Notes

Use snapshot() for retained records and the count helpers for bounded-history observability. The type does not perform persistence or background work.