LangChain.js Tracing

npm install --save @arizeai/openinference-instrumentation-langchain @arizeai/openinference-semantic-conventions @opentelemetry/exporter-trace-otlp-proto @opentelemetry/resources @opentelemetry/sdk-trace-node @opentelemetry/semantic-conventions

import { SEMRESATTRS_PROJECT_NAME } from "@arizeai/openinference-semantic-conventions";
import { LangChainInstrumentation } from "@arizeai/openinference-instrumentation-langchain";
import { OTLPTraceExporter } from "@opentelemetry/exporter-trace-otlp-proto";
import { Resource } from "@opentelemetry/resources";
import { NodeTracerProvider, SimpleSpanProcessor } from "@opentelemetry/sdk-trace-node";
import { ATTR_SERVICE_NAME } from "@opentelemetry/semantic-conventions";
import * as CallbackManagerModule from "@langchain/core/callbacks/manager";

const projectName = "your-langchain-project";

const provider = new NodeTracerProvider({
  resource: new Resource({
    [ATTR_SERVICE_NAME]: projectName,
    [SEMRESATTRS_PROJECT_NAME]: projectName,
  }),
  spanProcessors: [
    new SimpleSpanProcessor(
      new OTLPTraceExporter({
        url: "https://otlp.arize.com/v1/traces",
        headers: {
          space_id: process.env.ARIZE_SPACE_ID || "",
          api_key: process.env.ARIZE_API_KEY || "",
        },
      })
    ),
  ],
});

provider.register();

const lcInstrumentation = new LangChainInstrumentation();
lcInstrumentation.manuallyInstrument(CallbackManagerModule);