Struct LruCache 

pub struct LruCache<K, V> { /* private fields */ }

A generic LRU cache with configurable max size and TTL.

Thread-safe via internal RwLock. Expired entries are lazily evicted on access.

Implementations

impl<K, V> LruCache<K, V>

where K: Eq + Hash + Clone, V: Clone,

pub fn new(max_size: usize, ttl: Duration) -> Self

Create a new LRU cache with the given capacity and TTL.

pub fn from_config(config: &LruCacheConfig) -> Self

Create from a serializable config.

pub fn get(&self, key: &K) -> Option<V>

Get a value by key. Returns None if missing or expired.

pub fn insert(&self, key: K, value: V)

Insert a key-value pair. Evicts the LRU entry if at capacity.

pub fn invalidate(&self, key: &K) -> bool

Invalidate (remove) a specific key.

pub fn clear(&self)

Clear the entire cache.

pub fn contains(&self, key: &K) -> bool

Check if a key exists and is not expired.

pub fn len(&self) -> usize

Return the number of entries (including possibly-expired ones).

pub fn is_empty(&self) -> bool

Check if the cache is empty.

pub fn metrics(&self) -> &CacheMetrics

Access the cache metrics.