Enum AcquireReason 

#[non_exhaustive]
pub enum AcquireReason {
    Create,
    Reclaimed,
    Expired,
    Reassigned,
}

Why a split lease was acquired (the reason label on spate_coordination_acquisitions_total).

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.

Create

First claim of a runnable split no one has held.

Reclaimed

Fast reclaim of a split this worker (by stable id) still held.

Expired

Takeover of a split whose lease expired unrenewed.

Reassigned

Claim of a split whose previous owner released it cleanly — a drained revocation, or a shutdown/scale-down hand-back. Either way the owner cleared the record before letting go, so the resume point covers everything it emitted and the claim is replay-free; a drained revocation additionally counts RevocationOutcome::Drained on the releasing side. Contrast Expired, where a dead owner’s uncommitted tail replays.

One clean release counts here with no matching drained: the drain left behind by a RevocationOutcome::Cancelled revocation, which hands the split back to the worker that already had it. Counting it drained would claim a move that never happened.

The two clean cases are one reason on purpose: a claiming worker cannot tell them apart (both present as a cleared owner and a vanished lease), and a label it cannot populate correctly is a series that reads zero forever.

Trait Implementations

impl Clone for AcquireReason

fn clone(&self) -> AcquireReason

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for AcquireReason

impl Debug for AcquireReason

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

Formats the value using the given formatter.

impl Eq for AcquireReason

impl PartialEq for AcquireReason

fn eq(&self, other: &AcquireReason) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for AcquireReason