Struct TripleCache 

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

Generic LRU/LFU/FIFO/TTL cache for RDF data.

Thread-safe via an internal Mutex. The policy is selected at construction time.

Type Parameters

• K: Cache key type (must implement Eq + Hash + Clone).
• V: Cached value type (must implement Clone).

Implementations

impl<K: Eq + Hash + Clone, V: Clone> TripleCache<K, V>

pub fn new(capacity: usize, policy: CachePolicy, ttl: Option<Duration>) -> Self

Create a new cache with the given capacity, eviction policy, and optional TTL.

pub fn lru(capacity: usize) -> Self

Create an LRU cache with the given capacity and no TTL.

pub fn lru_ttl(capacity: usize, ttl: Duration) -> Self

Create an LRU+TTL cache.

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

Look up key and return a clone of the value if present and not expired.

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

Insert or replace key → value.

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

Remove key from the cache. Returns true if it was present.

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

Returns true if key is in the cache and not expired.

pub fn len(&self) -> usize

Number of live (non-expired) entries.

pub fn is_empty(&self) -> bool

pub fn clear(&self)

Remove all entries.

pub fn keys(&self) -> Vec<K>

All live keys.

pub fn stats(&self) -> Arc<CacheStats>

Shared statistics counter.