dd-trace

import tracer from 'dd-trace'; import express from 'express'; // Initialize the Datadog tracer early in your application lifecycle. // Configuration can also be done via environment variables (DD_SERVICE, DD_ENV, DD_VERSION). tracer.init({ service: process.env.DD_SERVICE || 'my-node-app', env: process.env.DD_ENV || 'development', version: process.env.DD_VERSION || '1.0.0', logInjection: true, debug: false // Set to true for verbose logging }); const app = express(); const port = process.env.PORT || 3000; app.get('/', async (req, res) => { // Automatic instrumentation will create a span for the Express request. // We can also create a custom span manually within it. const customSpan = tracer.startSpan('custom.db.query', { tags: { 'db.name': 'users_db', 'db.statement': 'SELECT * FROM users' } }); try { await new Promise(resolve => setTimeout(resolve, 100)); // Simulate async DB call customSpan.addTags({ 'db.row_count': 5, 'http.status_code': 200 }); res.send('Data retrieved successfully via Datadog Tracing!'); } catch (error) { customSpan.setTag('error', true); customSpan.log({ 'event': 'error', 'error.message': error.message }); res.status(500).send('Error during data retrieval!'); } finally { customSpan.finish(); } }); app.listen(port, () => { console.log(`Server listening on port ${port}`); console.log(`Datadog Tracer initialized for service: ${tracer.dogstatsd.service}`); console.log(`Ensure a Datadog Agent is running and accessible at DD_AGENT_HOST:${process.env.DD_AGENT_PORT || 8126}`); });