Struct RunnableWithMessageHistory 

pub struct RunnableWithMessageHistory { /* private fields */ }

Wraps a Runnable<Vec<Message>, String> with automatic message history load/save from a MemoryStore.

On each invocation:

1. Extracts session_id from config.metadata["session_id"] (defaults to "default")
2. Loads conversation history from memory
3. Appends Message::human(input) to the history
4. Calls the inner runnable with the full message list
5. Appends Message::ai(output) to memory
6. Returns the output string

Implementations

impl RunnableWithMessageHistory

pub fn new( inner: BoxRunnable<Vec<Message>, String>, memory: Arc<dyn MemoryStore>, ) -> Self

Create a new history-aware runnable wrapper.

Trait Implementations

impl Runnable<String, String> for RunnableWithMessageHistory

fn invoke<'life0, 'life1, 'async_trait>( &'life0 self, input: String, config: &'life1 RunnableConfig, ) -> Pin<Box<dyn Future<Output = Result<String, SynapticError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Execute this runnable on a single input.

fn batch<'life0, 'life1, 'async_trait>( &'life0 self, inputs: Vec<I>, config: &'life1 RunnableConfig, ) -> Pin<Box<dyn Future<Output = Vec<Result<O, SynapticError>>> + Send + 'async_trait>>

where 'life0: 'async_trait, 'life1: 'async_trait, Self: 'async_trait,

Execute this runnable on multiple inputs sequentially.

fn stream<'a>( &'a self, input: I, config: &'a RunnableConfig, ) -> Pin<Box<dyn Stream<Item = Result<O, SynapticError>> + Send + 'a>>

where I: 'a,

Stream the output. Default wraps invoke as a single-item stream. Override for true streaming (e.g., token-by-token from an LLM).

fn boxed(self) -> BoxRunnable<I, O>

where Self: Sized + 'static,

Wrap this runnable into a type-erased BoxRunnable for composition via |.