65 lines
1.8 KiB
JavaScript
65 lines
1.8 KiB
JavaScript
'use strict';
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const opentelemetry = require('@opentelemetry/api');
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const { BasicTracerProvider, SimpleSpanProcessor } = require('@opentelemetry/tracing');
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const { CanonicalCode } = require('@opentelemetry/api');
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const { StackdriverTraceExporter } = require('@opentelemetry/exporter-stackdriver-trace');
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// Initialize an exporter
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const exporter = new StackdriverTraceExporter({
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projectId: '<PROJECT_ID>',
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});
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const provider = new BasicTracerProvider();
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// Configure span processor to send spans to the provided exporter
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provider.addSpanProcessor(new SimpleSpanProcessor(exporter));
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// Initialize the OpenTelemetry APIs to use the NodeTracerProvider bindings
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provider.register();
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const tracer = opentelemetry.trace.getTracer('stackdriver-basic');
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// Create a span. A span must be closed.
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const root = tracer.startSpan('main');
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const related = tracer.startSpan('related', {
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links: [{ spanContext: root.context() }],
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});
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for (let i = 0; i < 10; i += 1) {
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doWork(root);
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doWork(related);
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}
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// Be sure to end the span.
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root.setStatus({
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code: CanonicalCode.UNKNOWN,
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});
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root.end();
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related.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', { parent });
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// simulate some random work.
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const work = Math.floor(Math.random() * 40000000);
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for (let i = 0; i <= work; i += 1) {
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// empty
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}
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if (work % 2 === 1) {
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span.setStatus({
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code: CanonicalCode.UNKNOWN,
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});
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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').end();
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}
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