@datadog/mobile-react-native/lib/module/rum/instrumentation/resourceTracking/distributedTracing/DatadogTracingContext.js

A client-side React Native module to interact with Datadog

/*
 * Unless explicitly stated otherwise all files in this repository are licensed under the Apache License Version 2.0.
 * This product includes software developed at Datadog (https://www.datadoghq.com/).
 * Copyright 2016-Present Datadog, Inc.
 */

import { DatadogTracingIdentifier } from './DatadogTracingIdentifier';
/**
 * An object that contains the tracing attributes as headers for network requests and attributes
 * for RUM Resources.
 */
export class DatadogTracingContext {
  constructor(requestHeaders, resourceContext, traceId, spanId) {
    this.headersForRequest = requestHeaders;
    this.rumResourceContext = resourceContext;
    this.traceId = traceId ? new DatadogTracingIdentifier(traceId) : undefined;
    this.spanId = spanId ? new DatadogTracingIdentifier(spanId) : undefined;
  }

  /**
   * Get the tracing headers to add to your network request.
   * @returns the headers for the request as a key-value object.
   */
  getHeadersForRequest() {
    return Object.fromEntries(this.headersForRequest.map(({
      header,
      value
    }) => [header, value]));
  }

  /**
   * Get the tracing headers to add to your network request, as an array of key-value objects.
   * @returns the headers for the request as an array of key-value objects.
   */
  getHeadersForRequestAsArray() {
    return [...this.headersForRequest];
  }

  /**
   * Get the RUM Resource Context tracing attributes to your RUM Resource context.
   * @returns the RUM Resource context tracing attributes.
   */
  getRumResourceContext() {
    return {
      ...this.rumResourceContext
    };
  }

  /**
   * Convenience method to inject the tracing headers to your request.
   * @param inject a callback that is called for each header that should be added to your request.
   */
  injectHeadersForRequest(inject) {
    this.headersForRequest.forEach(({
      header,
      value
    }) => inject(header, value));
  }

  /**
   * Convenience method to inject the RUM Resource attributes to your RUM Resource context.
   * @param inject a callback that is called for each attribute that should be added to your RUM Resource context.
   */
  injectRumResourceContext(inject) {
    Object.keys(this.rumResourceContext).forEach(key => {
      inject(key, this.rumResourceContext[key]);
    });
  }
}
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