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ConversationState

laser_sdk::agent

Struct ConversationState 

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pub struct ConversationState;
Expand description

Rebuilds in-memory state by folding a conversation’s logged events (event sourcing).

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impl ConversationState

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pub async fn load<S, F>( laser: &Laser, conversation: ConversationId, topics: Vec<AgentTopic<'static>>, bound: ReplayBound, init: S, fold: F, ) -> Result<S, LaserError>
where F: FnMut(S, &ContextMessage) -> S,

Replay topics for conversation under the explicit bound and fold every message through fold, starting from init.

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pub async fn load_with<Store, S, F>( laser: &Laser, store: &Store, conversation: ConversationId, topics: Vec<AgentTopic<'static>>, init: S, fold: F, ) -> Result<S, LaserError>
where Store: SnapshotStore + Sync, S: DeserializeOwned, F: FnMut(S, &ContextMessage) -> S,

Replay through a SnapshotStore: seed the fold with the newest snapshot’s state (decoded as JSON into S) and replay only from as_of + 1 per partition, so a thousand-record conversation snapshotted at nine hundred folds one hundred records, not a thousand. A conversation with no snapshot folds fully from init, the honest first build.

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