64 lines
2.2 KiB
JavaScript
64 lines
2.2 KiB
JavaScript
'use strict';
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const opentelemetry = require('@opentelemetry/api');
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const { Resource } = require('@opentelemetry/resources');
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const { SemanticResourceAttributes } = require('@opentelemetry/semantic-conventions');
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const { BasicTracerProvider, ConsoleSpanExporter, SimpleSpanProcessor } = require('@opentelemetry/tracing');
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const { JaegerExporter } = require('@opentelemetry/exporter-jaeger');
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const provider = new BasicTracerProvider({
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resource: new Resource({
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[SemanticResourceAttributes.SERVICE_NAME]: 'basic-service',
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}),
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});
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// Configure span processor to send spans to the exporter
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const exporter = new JaegerExporter({
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endpoint: 'http://localhost:14268/api/traces',
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});
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provider.addSpanProcessor(new SimpleSpanProcessor(exporter));
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provider.addSpanProcessor(new SimpleSpanProcessor(new ConsoleSpanExporter()));
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/**
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* Initialize the OpenTelemetry APIs to use the BasicTracerProvider bindings.
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*
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* This registers the tracer provider with the OpenTelemetry API as the global
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* tracer provider. This means when you call API methods like
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* `opentelemetry.trace.getTracer`, they will use this tracer provider. If you
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* do not register a global tracer provider, instrumentation which calls these
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* methods will receive no-op implementations.
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*/
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provider.register();
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const tracer = opentelemetry.trace.getTracer('example-basic-tracer-node');
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// Create a span. A span must be closed.
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const parentSpan = tracer.startSpan('main');
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for (let i = 0; i < 10; i += 1) {
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doWork(parentSpan);
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}
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// Be sure to end the span.
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parentSpan.end();
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// flush and close the connection.
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exporter.shutdown();
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function doWork(parent) {
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// Start another span. In this example, the main method already started a
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// span, so that'll be the parent span, and this will be a child span.
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const ctx = opentelemetry.trace.setSpan(opentelemetry.context.active(), parent);
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const span = tracer.startSpan('doWork', undefined, ctx);
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// simulate some random work.
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for (let i = 0; i <= Math.floor(Math.random() * 40000000); i += 1) {
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// empty
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}
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// Set attributes to the span.
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span.setAttribute('key', 'value');
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// Annotate our span to capture metadata about our operation
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span.addEvent('invoking doWork');
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span.end();
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}
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