Struct BuiltHandler 

pub struct BuiltHandler { /* private fields */ }

Handler constructed via HandlerBuilder.

Trait Implementations

impl CallbackHandler for BuiltHandler

fn on_chain_start(&self, runnable: &str, input: &Value, run_id: Uuid)

A Runnable (chain / graph) started.

fn on_chain_end(&self, runnable: &str, output: &Value, run_id: Uuid)

A Runnable finished successfully.

fn on_chain_error(&self, runnable: &str, error: &str, run_id: Uuid)

A Runnable errored.

fn on_llm_start(&self, model: &str, prompt: &Value, run_id: Uuid)

LLM / chat-model invocation started.

fn on_llm_token(&self, token: &str, run_id: Uuid)

LLM emitted a streamed token.

fn on_llm_end(&self, model: &str, output: &Value, run_id: Uuid)

LLM finished a generation.

fn on_llm_error(&self, model: &str, error: &str, run_id: Uuid)

LLM errored.

fn on_tool_start(&self, tool: &str, args: &Value, run_id: Uuid)

Tool execution started.

fn on_tool_end(&self, tool: &str, result: &Value, run_id: Uuid)

Tool execution finished.

fn on_tool_error(&self, tool: &str, error: &str, run_id: Uuid)

Tool errored.

fn on_node_start(&self, node: &str, step: u64, run_id: Uuid)

Graph node started.

fn on_node_end(&self, node: &str, step: u64, output: &Value, run_id: Uuid)

Graph node finished.

fn on_checkpoint(&self, step: u64, run_id: Uuid)

Graph engine persisted a checkpoint.

fn on_custom(&self, kind: &str, payload: &Value, run_id: Uuid)

Custom node-emitted event.

fn name(&self) -> &str

Friendly name for diagnostics.