Struct SpanBuilder 

pub struct SpanBuilder {
    pub span: Span,
}

In-flight span being assembled between on_*_start and on_*_end. Pure data; no behavior — TracingHandler drives it.

Fields

span: Span

The span being assembled. ended_at, output, level, status_message, and (for Generation) generation are filled at close time.

Implementations

impl SpanBuilder

pub fn open( run_id: Uuid, parent_run_id: Option<Uuid>, trace_id: Uuid, kind: SpanKind, name: impl Into<String>, input: Option<Value>, now: SystemTime, ) -> Self

Open a new span at now.

pub fn finish_ok(self, output: Option<Value>, now: SystemTime) -> Span

Mark the span ended successfully and stamp the output.

pub fn finish_error(self, message: impl Into<String>, now: SystemTime) -> Span

Mark the span ended with an error.

pub fn with_generation(self, gen: Generation) -> Self

Attach a populated Generation payload (used on on_llm_end).

Trait Implementations

impl Clone for SpanBuilder

fn clone(&self) -> SpanBuilder

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for SpanBuilder

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.