Azure Core tracing library for JavaScript

This is the core tracing library that provides low-level interfaces and helper methods for tracing in Azure SDK JavaScript libraries which work in the browser and Node.js.

Getting started

Installation

Install this library using npm as follows

npm install @azure/core-tracing

Key Concepts

The @azure/core-tracing package supports enabling tracing for Azure SDK packages, using an OpenTelemetry Tracer.

By default, all libraries log with a NoOpTracer that takes no action. To change this, you have to use setTracer to set a new default Tracer.

Examples

Example 1 - Setting an OpenTelemetry Tracer

const opentelemetry = require("@opentelemetry/api");
const { BasicTracer, SimpleSpanProcessor } = require("@opentelemetry/tracing");
const { ZipkinExporter } = require("@opentelemetry/exporter-zipkin");
const { setTracer } = require("@azure/core-tracing");

const exporter = new ZipkinExporter({
  serviceName: "azure-tracing-sample"
});
const tracer = new BasicTracer();
tracer.addSpanProcessor(new SimpleSpanProcessor(exporter));

setTracer(tracer);

const rootSpan = tracer.startSpan("root");
const context = opentelemetry.setSpan(opentelemetry.context.active(), rootSpan);

// Call some client library methods and pass rootSpan via tracingOptions.

rootSpan.end();
exporter.shutdown();

Example 2 - Passing current Context to library operations

// Given a BlobClient from @azure/storage-blob
const result = await blobClient.download(undefined, undefined, {
  tracingOptions: {
    tracingContext: context
  }
});

Next steps

You can build and run the tests locally by executing rushx test. Explore the test folder to see advanced usage and behavior of the public classes.

Troubleshooting

If you run into issues while using this library, please feel free to file an issue.

Contributing

If you'd like to contribute to this library, please read the contributing guide to learn more about how to build and test the code.

Impressions

Current Tags

1.2.1-alpha.20241022.3 ... dev (23 days ago)
1.2.0 ... latest (a month ago)

275 Versions

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