dd-trace/packages/dd-trace/src/noop/span.js

Datadog APM tracing client for JavaScript

'use strict'

const id = require('../id')
const { storage } = require('../../../datadog-core') // TODO: noop storage?
const NoopSpanContext = require('./span_context')

const legacyStorage = storage('legacy')

class NoopSpan {
  constructor (tracer, parent) {
    this._store = legacyStorage.getHandle()
    this._noopTracer = tracer
    this._noopContext = this._createContext(parent)
  }

  context () { return this._noopContext }
  tracer () { return this._noopTracer }
  setOperationName (name) { return this }
  setBaggageItem (key, value) { return this }
  getBaggageItem (key) {}
  getAllBaggageItems () {}
  removeBaggageItem (key) { return this }
  removeAllBaggageItems () { return this }
  setTag (key, value) { return this }
  addTags (keyValueMap) { return this }
  addLink (link) { return this }
  addLinks (links) { return this }
  addSpanPointer (ptrKind, ptrDir, ptrHash) { return this }
  log () { return this }
  logEvent () {}
  finish (finishTime) {}

  _createContext (parent) {
    const spanId = id()

    return parent
      ? new NoopSpanContext({
        noop: this,
        traceId: parent._traceId,
        spanId,
        parentId: parent._spanId,
        baggageItems: { ...parent._baggageItems },
      })
      : new NoopSpanContext({
        noop: this,
        traceId: spanId,
        spanId,
      })
  }
}

module.exports = NoopSpan