zipkin-context-cls

zipkin-context-cls

This module implements a context API on top of CLS/continuation-local-storage. The primary objective of CLS is to implement a transparent context API, that is, you don't need to pass around a ctx variable everywhere in your application code.

Usage:

const CLSContext = require('zipkin-context-cls');
const tracer = new Tracer({
  ctxImpl: new CLSContext('zipkin'),
  recorder, // typically Kafka or Scribe
  localServiceName: 'service-a' // name of this application
});

A note on CLS context vs. explicit context

There are known issues and limitations with CLS, so some people might prefer to use ExplicitContext instead; the drawback then is that you have to pass around a context object manually.