/
tracing.js
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/
tracing.js
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'use strict';
const opentelemetry = require('@opentelemetry/api');
const { BasicTracerProvider, ConsoleSpanExporter, SimpleSpanProcessor } = require('@opentelemetry/sdk-trace-base');
const { CollectorTraceExporter } = require('@opentelemetry/exporter-collector');
const { Resource } = require('@opentelemetry/resources');
const { SemanticResourceAttributes } = require('@opentelemetry/semantic-conventions');
// const { CollectorTraceExporter } = require('@opentelemetry/exporter-collector-grpc');
// const { CollectorTraceExporter } = require('@opentelemetry/exporter-collector-proto');
// opentelemetry.diag.setLogger(
// new opentelemetry.DiagConsoleLogger(),
// opentelemetry.DiagLogLevel.DEBUG,
// );
const exporter = new CollectorTraceExporter({
// headers: {
// foo: 'bar'
// },
});
const provider = new BasicTracerProvider({
resource: new Resource({
[SemanticResourceAttributes.SERVICE_NAME]: 'basic-service',
}),
});
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 ctx = opentelemetry.trace.setSpan(opentelemetry.context.active(), parent);
const span = tracer.startSpan('doWork', undefined, ctx);
// 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');
span.setAttribute('mapAndArrayValue', [
0, 1, 2.25, 'otel', {
foo: 'bar',
baz: 'json',
array: [1, 2, 'boom'],
},
]);
// Annotate our span to capture metadata about our operation
span.addEvent('invoking doWork');
// end span
span.end();
}