Struct QueryResultCache 

pub struct QueryResultCache { /* private fields */ }

Caches SPARQL query results keyed by a (dataset_id, query_hash) pair.

Internally delegates to TripleCache<(String, u64), QueryCacheEntry>.

Implementations

impl QueryResultCache

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

Create a new result cache with capacity entries and a TTL.

pub fn put( &self, dataset_id: &str, query: &str, rows: Vec<SparqlRow>, variables: Vec<String>, accessed_predicates: Vec<String>, )

Store a result set for (dataset_id, query).

pub fn get(&self, dataset_id: &str, query: &str) -> Option<QueryCacheEntry>

Look up a cached result for (dataset_id, query).

pub fn invalidate_by_predicate( &self, dataset_id: &str, predicate: &str, ) -> usize

Invalidate all entries for dataset_id that accessed predicate.

pub fn invalidate_dataset(&self, dataset_id: &str) -> usize

Invalidate all entries for dataset_id.

pub fn len(&self) -> usize

Number of cached entries.

pub fn is_empty(&self) -> bool

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

Shared stats.