Struct MemoryCacheStore 

pub struct MemoryCacheStore { /* private fields */ }

In-memory CacheStore with optional TTL and LRU eviction.

Default constructor builds an unbounded store (no TTL, no LRU). Use Self::builder to opt in to limits — e.g. MemoryCacheStore::builder().max_entries(256).max_age(Duration::from_secs(60)).build().

Eviction is checked lazily on get (expired entries are removed) and on put (over-capacity entries are dropped, least-recently-used first). LRU is approximated with a monotonic counter — no doubly-linked list — which keeps the struct small at the cost of O(n) eviction. That’s fine for the caches we expect (≤ a few hundred entries).

Implementations

impl MemoryCacheStore

pub fn new() -> Self

Build an unbounded store (no TTL, no LRU).

pub fn builder() -> MemoryCacheStoreBuilder

Start a builder for an LRU- / TTL-bounded store.

pub fn len(&self) -> usize

Number of entries currently cached.

Note: this does not prune expired entries first. Use Self::is_empty or a fresh get to trigger pruning if needed.

Panics

Panics if the internal mutex was poisoned by a prior panic.

pub fn is_empty(&self) -> bool

true when the store has no entries.

Panics

Panics if the internal mutex was poisoned by a prior panic.

Trait Implementations

impl CacheStore for MemoryCacheStore

fn get(&self, key: &str) -> Option<CachedEntry>

Look up an entry by key. None is a miss.

fn put(&self, key: String, value: CachedEntry)

Store an entry. Overwrites any existing value for key.

impl Debug for MemoryCacheStore

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

Formats the value using the given formatter.

impl Default for MemoryCacheStore

fn default() -> MemoryCacheStore

Returns the “default value” for a type.