Struct EvalCassette 

pub struct EvalCassette { /* private fields */ }

An EffectLedger-backed cache of content-addressed eval replies.

The hot path is an in-memory BTreeMap. Recording a new reply writes to the configured ledger first, then updates the in-memory map. Constructing a cassette with EvalCassette::from_ledger replays ledger entries into a fresh map.

Implementations

impl EvalCassette

pub fn new(ledger: Arc<dyn EvalCassetteLedger>) -> Self

Creates an empty cassette backed by ledger.

pub fn from_ledger(ledger: Arc<dyn EvalCassetteLedger>) -> Result<Self>

Replays ledger into a fresh in-memory map.

pub fn get(&self, key: &ContentKey) -> Option<EvalReply>

Returns a cached reply for key.

pub fn record(&self, key: ContentKey, reply: EvalReply) -> Result<()>

Records reply under key, writing the ledger before updating cache.

pub fn len(&self) -> usize

Returns the number of cached replies.

pub fn is_empty(&self) -> bool

Returns whether the cassette has no cached replies.