Struct Scope 

pub struct Scope { /* private fields */ }

One scope declaration: a key-prefix slice owned by writer, with an optional fallback server that takes over writes when the writer is flagged DOWN by kevy-elect.

The prefix is Vec<u8> (not String) because keys are arbitrary bytes in kevy; restricting to UTF-8 would be a stricter contract than the RESP wire offers.

Implementations

impl Scope

pub fn new(prefix: Vec<u8>, writer: String) -> Self

Build a minimal scope: prefix + writer. Add a fallback via Self::with_fallback if F4 is in play.

pub fn with_fallback(self, fallback: String) -> Self

Declare a fallback node-id. When the writer is flagged DOWN by kevy-elect, the fallback starts accepting writes for this scope (F4). The fallback is one specific server — not “any alive node” — so its identity is operator-visible and not the cluster’s discretion.

pub fn prefix(&self) -> &[u8]

Key-prefix slice this scope owns. Lifetime tied to the scope (not a clone) so longest-prefix routing avoids allocation per lookup.

pub fn writer(&self) -> &str

Declared writer’s node id.

pub fn fallback(&self) -> Option<&str>

Declared fallback’s node id, if any. None means “no fallback” — when the writer is DOWN, writes for this scope fail (the operator chose availability < strict ownership).

pub fn matches(&self, key: &[u8]) -> bool

true if key starts with this scope’s prefix.

Trait Implementations

impl Clone for Scope

fn clone(&self) -> Scope

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Scope

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

Formats the value using the given formatter.

impl Eq for Scope

impl PartialEq for Scope

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for Scope