struct ReportedUppers<T> {
    per_replica: HashMap<ReplicaId, Antichain<T>>,
    bounds: FrontierBounds<T>,
}
Expand description

Reported upper frontiers for a single compute collection.

The type maintains the following invariants:

  • replica frontiers only advance
  • frontier bounds only advance
  • bounds.lower <= bounds.upper
  • bounds.lower is the lower bound of the frontiers of all active replicas
  • bounds.upper is the upper bound of the frontiers of all replicas

Fields

per_replica: HashMap<ReplicaId, Antichain<T>>

The reported uppers per replica.

bounds: FrontierBounds<T>

The lower and upper bound of all reported uppers.

Implementations

Construct a ReportedUppers that tracks frontiers of the given replicas.

Start tracking the given replica.

Panics
  • If the given replica_id is already tracked.

Stop tracking the given replica.

Returns true iff the update caused a change in any of the two bounds.

Panics
  • If the given replica_id is not tracked.

Return whether the given replica’s frontiers are tracked.

Apply a frontier update from a single replica.

Returns true iff the update caused a change in any of the two bounds.

Panics
  • If the given replica_id is not tracked.

Update bounds.lower to restore its invariants.

Returns true iff the update caused a change in the lower bound.

Trait Implementations

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Auto Trait Implementations

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