Module result_cache 

Advanced query result cache with TTL and LRU eviction

This module provides a production-ready caching system for SPARQL query results with support for:

• Time-To-Live (TTL) expiration
• Least Recently Used (LRU) eviction
• Memory-aware cache management
• Concurrent access with minimal contention
• Cache statistics and monitoring

Example

use oxirs_core::query::result_cache::{QueryResultCache, CacheConfig};
use std::time::Duration;

let config = CacheConfig {
    max_entries: 1000,
    max_memory_bytes: 100 * 1024 * 1024, // 100 MB
    default_ttl: Duration::from_secs(300), // 5 minutes
    enable_lru: true,
};

let cache = QueryResultCache::new(config);

// Cache a query result
let query = "SELECT * WHERE { ?s ?p ?o }".to_string();
let results = vec!["result1".to_string(), "result2".to_string()];
cache.put(query.clone(), results.clone());

// Retrieve from cache
if let Some(cached) = cache.get(&query) {
    println!("Cache hit! Results: {:?}", cached);
}

Structs

CacheConfig

Configuration for the query result cache

CacheStats

Cache statistics for monitoring

QueryResultCache

Query result cache with TTL and LRU eviction