45 lines
1.3 KiB
JavaScript
45 lines
1.3 KiB
JavaScript
'use strict';
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const api = require('@opentelemetry/api');
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const tracer = require('./tracer')('example-http-server');
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const http = require('http');
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/** Starts a HTTP server that receives requests on sample server port. */
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function startServer(port) {
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// Creates a server
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const server = http.createServer(handleRequest);
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// Starts the server
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server.listen(port, (err) => {
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if (err) {
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throw err;
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}
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console.log(`Node HTTP listening on ${port}`);
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});
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}
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/** A function which handles requests and send response. */
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function handleRequest(request, response) {
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const currentSpan = api.trace.getSpan(api.context.active());
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// display traceid in the terminal
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console.log(`traceid: ${currentSpan.spanContext().traceId}`);
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const span = tracer.startSpan('handleRequest', {
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kind: 1, // server
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attributes: { key: 'value' },
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});
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// Annotate our span to capture metadata about the operation
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span.addEvent('invoking handleRequest');
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const body = [];
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request.on('error', (err) => console.log(err));
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request.on('data', (chunk) => body.push(chunk));
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request.on('end', () => {
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// deliberately sleeping to mock some action.
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setTimeout(() => {
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span.end();
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response.end('Hello World!');
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}, 2000);
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});
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}
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startServer(8080);
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