const { NodeTracerProvider } = require('@opentelemetry/node');
const { getNodeAutoInstrumentations } = require('@opentelemetry/auto-instrumentations-node');
const { CollectorTraceExporter } = require('@opentelemetry/exporter-collector');
const { SimpleSpanProcessor } = require('@opentelemetry/tracing');
const { registerInstrumentations } = require('@opentelemetry/instrumentation');

const exporter = new CollectorTraceExporter({
  serviceName: 'auto-instrumentations-node',
});

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

registerInstrumentations({
  instrumentations: [
    getNodeAutoInstrumentations({
      // load custom configuration for http instrumentation
      "@opentelemetry/instrumentation-http": {
        applyCustomAttributesOnSpan: (span)=> {
          span.setAttribute('foo2', 'bar2');
        },
      },
    }),
  ],
});