Package Exports

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (@opentelemetry/context-zone) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

OpenTelemetry Context Zone

This module provides Zone Context Manager with bundled zone-js for Web applications. If you have your own zone-js please use @opentelemetry/context-zone-peer-dep If you use Angular it means you already have the zone-js and you should use @opentelemetry/context-zone-peer-dep

Installation

npm install --save @opentelemetry/context-zone

Usage

import { context, trace } from '@opentelemetry/api';
import {
  ConsoleSpanExporter,
  SimpleSpanProcessor,
  WebTracerProvider,
} from '@opentelemetry/sdk-trace-web';
import { ZoneContextManager } from '@opentelemetry/context-zone';

const providerWithZone = new WebTracerProvider({
  spanProcessors: [new SimpleSpanProcessor(new ConsoleSpanExporter())]
});
providerWithZone.register({
  contextManager: new ZoneContextManager()
});

// Example how the ZoneContextManager keeps the reference to the correct context during async operations
const webTracerWithZone = providerWithZone.getTracer('default');
const span1 = webTracerWithZone.startSpan('foo1');

context.with(trace.setSpan(context.active(), span1), () => {
  console.log('Current span is span1', trace.getSpan(context.active()) === span1);
  setTimeout(() => {
    const span2 = webTracerWithZone.startSpan('foo2');
    console.log('Current span is span1', trace.getSpan(context.active()) === span1);
    context.with(trace.setSpan(context.active(), span2), () => {
      console.log('Current span is span2', trace.getSpan(context.active()) === span2);
      setTimeout(() => {
        console.log('Current span is span2', trace.getSpan(context.active()) === span2);
      }, 500);
    });
    // there is a timeout which still keeps span2 active
    console.log('Current span is span2', trace.getSpan(context.active()) === span2);
  }, 500);
  console.log('Current span is span1', trace.getSpan(context.active()) === span1);
});

Useful links

For more information on OpenTelemetry, visit: https://opentelemetry.io/
For more about OpenTelemetry JavaScript: https://github.com/open-telemetry/opentelemetry-js
For help or feedback on this project, join us in GitHub Discussions

License

Apache 2.0 - See LICENSE for more information.