Class LangSmithOTLPTraceExporter

LangSmith OpenTelemetry trace exporter that extends the standard OTLP trace exporter with LangSmith-specific configuration and span attribute transformations.

This exporter automatically configures itself with LangSmith endpoints and API keys, based on your LANGSMITH_API_KEY and LANGSMITH_PROJECT environment variables. Will also respect OTEL_EXPORTER_OTLP_ENDPOINT or OTEL_EXPORTER_OTLP_HEADERS environment variables if set.

Param: config

Optional configuration object that accepts all OTLPTraceExporter parameters. If not provided, uses default LangSmith configuration: - url: Defaults to LangSmith OTEL endpoint (${LANGSMITH_ENDPOINT}/otel/v1/traces) - headers: Auto-configured with LangSmith API key and project headers Any provided config will override these defaults.

Hierarchy

  • OTLPTraceExporter
    • LangSmithOTLPTraceExporter

Constructors

constructor

Methods

export forceFlush shutdown

Constructors

constructor

  • new LangSmithOTLPTraceExporter(
        config?: OTLPExporterNodeConfigBase & {
            transformExportedSpan?: (
                span: ReadableSpan,
            ) => ReadableSpan | Promise<ReadableSpan>;
        },
    ): LangSmithOTLPTraceExporter

    Parameters

    • Optionalconfig: OTLPExporterNodeConfigBase & {
          transformExportedSpan?: (
              span: ReadableSpan,
          ) => ReadableSpan | Promise<ReadableSpan>;
      }
      • OptionaltransformExportedSpan?: (span: ReadableSpan) => ReadableSpan | Promise<ReadableSpan>

        A function that takes an exported span and returns a transformed version of it. May be used to add or remove attributes from the span.

        For example, to add a custom attribute to the span, you can do:

        import { LangSmithOTLPTraceExporter } from "langsmith/experimental/otel/exporter";

        const exporter = new LangSmithOTLPTraceExporter({
          transformExportedSpan: (span) => {
            if (span.name === "foo") {
              span.attributes["langsmith.metadata.bar"] = "baz";
            }
            return span;
          }
        });

    Returns LangSmithOTLPTraceExporter

Methods

export

  • export(
        spans: ReadableSpan[],
        resultCallback: (result: ExportResult) => void,
    ): void

    Export items.

    Parameters

    • spans: ReadableSpan[]
    • resultCallback: (result: ExportResult) => void

    Returns void

forceFlush

  • forceFlush(): Promise<void>

    Returns Promise<void>

shutdown

  • shutdown(): Promise<void>

    Returns Promise<void>

Settings

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Constructors
Methods