Struct UpdatedAtStamper 

pub struct UpdatedAtStamper { /* private fields */ }

A cloneable handle that mints _updated_at register values from a shared Hlc — the register-stamping capability, sliced off the whole [crate::sync::sync_manager::SyncManager].

coven creates this handle during open and injects it into the write path before any [crate::sync::sync_manager::SyncManager] exists. The manager, built later, borrows the same Arc<Hlc>: coven advances that clock past every pulled row, and because the stamper shares the instance, that advance reaches every [crate::SqlContext::stamp] call, so a later local write never sorts behind a pulled row and loses last-writer-wins. Every clone shares one Arc<Hlc>, so coven’s seeding and advance-on-pull are reflected in every stamp.

It exposes only UpdatedAtStamper::stamp — never seed/advance_past/ high_water. Those drive the clock and are coven’s alone; the host write path is a pure consumer of stamps and must not poke clock state.

Implementations

impl UpdatedAtStamper

pub fn new(hlc: Arc<Hlc>) -> Self

pub fn stamp(&self) -> String

Mint the next _updated_at register value for a synced-row write. The returned string is an opaque HLC stamp; the host binds it into the write and must not parse or compare it as a wall-clock time.

pub fn for_test() -> Self

A standalone stamper over a fresh in-memory HLC, for tests that need a real stamper without opening coven. Not for production — production stampers come from the open path so they share the seeded, pull-advanced clock.

Trait Implementations

impl Clone for UpdatedAtStamper

fn clone(&self) -> UpdatedAtStamper

Returns a duplicate of the value.

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

Performs copy-assignment from source.