Struct SingleValueCache 

pub struct SingleValueCache<V> { /* private fields */ }

A single-value cache with TTL, useful for caching expensive one-off computations like bootstrap data.

Provides stale-while-revalidate semantics: if refresh fails, stale data can be used.

Implementations

impl<V: Clone> SingleValueCache<V>

pub fn new(ttl: Duration) -> Self

Creates a new single-value cache with the specified TTL.

pub fn get(&self) -> Option<V>

Gets the cached value if it exists and is not expired.

pub fn get_stale(&self) -> Option<V>

Gets the cached value even if expired (for fallback during refresh failures).

pub fn needs_refresh(&self) -> bool

Checks if the cache needs refresh (value is stale or missing).

pub fn has_value(&self) -> bool

Checks if the cache has any value (even if expired).

pub fn set(&self, value: V)

Sets the cached value.

pub fn clear(&self)

Clears the cached value.