eve/dist/src/tracing/vercel-runtime-span-exporter.js

Filesystem-first framework for durable backend AI agents that run anywhere.

import{createLogger,formatError}from"#internal/logging.js";import{TraceFlags}from"#compiled/@opentelemetry/api/index.js";import{JsonTraceSerializer}from"#compiled/@opentelemetry/otlp-transformer/index.js";const VERCEL_REQUEST_CONTEXT=Symbol.for(`@vercel/request-context`),log=createLogger(`tracing.vercel-runtime-span-exporter`);function vercelRuntimeSpanExporter(){return{export(e,t){let n=globalThis[VERCEL_REQUEST_CONTEXT]?.get()?.telemetry;if(n===void 0){t({code:0});return}try{let r=JsonTraceSerializer.serializeRequest([...e]);if(r===void 0)throw Error(`Failed to serialize spans.`);n.reportSpans(JSON.parse(new TextDecoder().decode(r))),t({code:0})}catch(e){t({code:1,error:e instanceof Error?e:Error(String(e))})}},forceFlush:async()=>void 0,shutdown:async()=>void 0}}function vercelRuntimeSpanProcessor(){let e=vercelRuntimeSpanExporter(),t=!1;return{forceFlush:()=>e.forceFlush?.()??Promise.resolve(),onEnd(n){!t&&isSampled(n)&&e.export([n],e=>{e.code!==0&&log.warn(`Agent Runs export failed`,{error:formatError(e.error??Error(`Span export failed.`))})})},onStart(){},async shutdown(){t=!0,await e.shutdown()}}}function isSampled(e){if(typeof e!=`object`||!e||!(`spanContext`in e))return!1;let t=e.spanContext;if(typeof t!=`function`)return!1;let n=Reflect.apply(t,e,[]);return typeof n.traceFlags==`number`&&(n.traceFlags&TraceFlags.SAMPLED)===TraceFlags.SAMPLED}export{vercelRuntimeSpanExporter,vercelRuntimeSpanProcessor};