59 lines
1.9 KiB
JavaScript
59 lines
1.9 KiB
JavaScript
const opentelemetry = require('@opentelemetry/core');
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const { BasicTracerRegistry, SimpleSpanProcessor } = require('@opentelemetry/tracing');
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const { JaegerExporter } = require('@opentelemetry/exporter-jaeger');
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const { ZipkinExporter } = require('@opentelemetry/exporter-zipkin');
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const { CollectorExporter } = require('@opentelemetry/exporter-collector');
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const options = {
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serviceName: 'basic-service'
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};
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// Initialize an exporter depending on how we were started
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let exporter;
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const EXPORTER = process.env.EXPORTER || '';
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if (EXPORTER.toLowerCase().startsWith('z')) {
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exporter = new ZipkinExporter(options);
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} else if (EXPORTER.toLowerCase().startsWith('j')) {
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exporter = new JaegerExporter(options);
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} else {
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exporter = new CollectorExporter(options);
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}
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const registry = new BasicTracerRegistry();
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// Configure span processor to send spans to the provided exporter
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registry.addSpanProcessor(new SimpleSpanProcessor(exporter));
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// Initialize the OpenTelemetry APIs to use the BasicTracerRegistry bindings
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opentelemetry.initGlobalTracerRegistry(registry);
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const tracer = opentelemetry.getTracer('example-basic-tracer-node')
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// Create a span. A span must be closed.
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const span = tracer.startSpan('main');
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for (let i = 0; i < 10; i++) {
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doWork(span);
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}
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// Be sure to end the span.
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span.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 span = tracer.startSpan('doWork', {
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parent: parent
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});
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// simulate some random work.
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for (let i = 0; i <= Math.floor(Math.random() * 40000000); i++) { }
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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').end();
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}
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