Enum OriginKind 

#[non_exhaustive]
pub enum OriginKind {
    Http,
    Filesystem,
    S3,
    Peer,
}

Tag identifying which origin backend a cache engine is configured against (#439). Surfaced through the admin eviction-preview so dry-run callers can estimate origin egress cost — re-fetching from a Filesystem origin is a local read; Http and S3 may consume metered bandwidth.

The serde representation uses lowercase tag names (http, filesystem, s3) so admin RPC JSON output is operator-friendly and stable for log scrapers. (OriginKind itself is output-only — it is never deserialised from operator TOML; the [cache.origin] table uses OriginConfig.)

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.

Http

Pull-through over HTTP/HTTPS.

Filesystem

Pull-through from a local filesystem directory.

S3

Pull-through from an S3-compatible object store.

Peer

Paid pull-through from another deCDN node over cdn/client/v1 (node-to-node cache-miss fill, #831). Unlike the other kinds this egress is billed in USDC per MB (an upstream provider charges this node), so an eviction-preview caller should treat a re-fetch from a Peer origin as the most expensive option. This variant is node-internal — it is never parsed from operator TOML (the [cache.origin] table only accepts http/filesystem/s3); it only ever appears in admin/eviction output to tag the network origin.

Implementations

impl OriginKind

pub const fn as_str(self) -> &'static str

Stable lowercase string label suitable for log fields and metrics. Operators may grep on this — keep the variants stable.

Trait Implementations

impl Clone for OriginKind

fn clone(&self) -> OriginKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for OriginKind

impl Debug for OriginKind

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for OriginKind

fn deserialize<__D>( __deserializer: __D, ) -> Result<OriginKind, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for OriginKind

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

Formats the value using the given formatter.

impl Eq for OriginKind

impl Hash for OriginKind

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for OriginKind

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for OriginKind

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for OriginKind