Enum OriginPresence 

pub enum OriginPresence {
    Present(u64),
    Absent,
    Fault,
}

A live origin-existence answer (#1766), distinguishing a genuine negative from a backend fault. It is the target of the two-way collapse in crate::origin_probe::Presence: Present/Absent map straight across, and Fault is folded into “don’t advertise” — see CacheEngine::origin_probe_size.

Variants

Present(u64)

A configured origin holds the blob; carries the total byte size.

Absent

No configured origin holds the blob: a genuine HEAD/HeadObject 404, or no origin is configured at all (CacheError::NoOrigin — a node with nothing configured genuinely holds nothing; that is not a transient condition).

Fault

The probe could not get an authoritative answer: a transport error, or the live HEAD overran cache.origin_probe_timeout_ms. Distinct from Absent on purpose — a caller that would otherwise sign an authoritative NotFound must not do so on a fault; see the origin-only serve gate (dispatch.rs).

Trait Implementations

impl Clone for OriginPresence

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for OriginPresence

impl Debug for OriginPresence

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

Formats the value using the given formatter.

impl Eq for OriginPresence

impl From<Presence> for OriginPresence

fn from(presence: Presence) -> Self

Converts to this type from the input type.

impl PartialEq for OriginPresence

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for OriginPresence