start.js

'use strict';

const opentelemetry = require('@opentelemetry/api');
const { BasicTracerProvider, ConsoleSpanExporter, SimpleSpanProcessor } = require('@opentelemetry/tracing');
const { CollectorTraceExporter } = require('@opentelemetry/exporter-collector');

const address = '127.0.0.1:55680';
const exporter = new CollectorTraceExporter({
  serviceName: 'basic-service',
  url: address,
});

const provider = new BasicTracerProvider();
provider.addSpanProcessor(new SimpleSpanProcessor(exporter));
provider.addSpanProcessor(new SimpleSpanProcessor(new ConsoleSpanExporter()));
provider.register();

const tracer = opentelemetry.trace.getTracer('example-collector-exporter-node');

// Create a span. A span must be closed.
const parentSpan = tracer.startSpan('main');
for (let i = 0; i < 10; i += 1) {
  doWork(parentSpan);
}
// Be sure to end the span.
parentSpan.end();

// give some time before it is closed
setTimeout(() => {
  // flush and close the connection.
  exporter.shutdown();
}, 2000);

function doWork(parent) {
  // Start another span. In this example, the main method already started a
  // span, so that'll be the parent span, and this will be a child span.
  const span = tracer.startSpan('doWork', {
    parent,
  });

  // simulate some random work.
  for (let i = 0; i <= Math.floor(Math.random() * 40000000); i += 1) {
    // empty
  }
  // Set attributes to the span.
  span.setAttribute('key', 'value');

  // Annotate our span to capture metadata about our operation
  span.addEvent('invoking doWork');

  // end span
  span.end();
}