Struct ResponseCache 

pub struct ResponseCache { /* private fields */ }

Response cache backed by a dedicated SQLite database.

Implementations

impl ResponseCache

pub async fn new( db_dir: &Path, ttl_minutes: u32, max_entries: usize, ) -> MemoryResult<Self>

Open (or create) the response cache database at {db_dir}/response_cache.db.

pub fn cache_key( model: &str, system_prompt: Option<&str>, user_prompt: &str, ) -> String

Build a deterministic cache key from model + system prompt + user prompt.

pub async fn get(&self, key: &str) -> MemoryResult<Option<String>>

Look up a cached response. Returns None on miss or if the entry has expired.

pub async fn put( &self, key: &str, model: &str, response: &str, token_count: u32, ) -> MemoryResult<()>

Store a response in the cache, evicting expired or least-recently-used entries.

pub async fn stats(&self) -> MemoryResult<(usize, u64, u64)>

Return cache statistics: (total_entries, total_hits, estimated_tokens_saved).

pub async fn clear(&self) -> MemoryResult<usize>

Clear all cached entries.