static create()

in packages/sdk/src/Confidence.ts [342:400]
56 lines of code
3 McCabe index (conditional complexity)

  static create({
    clientSecret,
    region,
    timeout,
    environment,
    fetchImplementation = defaultFetchImplementation(),
    logger = defaultLogger(),
    resolveBaseUrl,
    disableTelemetry = false,
  }: ConfidenceOptions): Confidence {
    const sdk = {
      id: SdkId.SDK_ID_JS_CONFIDENCE,
      version: '0.2.2', // x-release-please-version
    } as const;
    const telemetry = new Telemetry({
      disabled: disableTelemetry,
      logger,
      environment,
    });
    let flagResolverClient: FlagResolverClient = new FetchingFlagResolverClient({
      clientSecret,
      fetchImplementation,
      sdk,
      environment,
      resolveTimeout: timeout,
      region,
      resolveBaseUrl,
      telemetry,
    });
    if (environment === 'client') {
      flagResolverClient = new CachingFlagResolverClient(flagResolverClient, Number.POSITIVE_INFINITY);
    }
    const estEventSizeKb = 1;
    const flushTimeoutMilliseconds = 500;
    // default grpc payload limit is 4MB, so we aim for a 1MB batch-size
    const maxBatchSize = Math.floor(1024 / estEventSizeKb);
    const eventSenderEngine = new EventSenderEngine({
      clientSecret,
      maxBatchSize,
      flushTimeoutMilliseconds,
      fetchImplementation,
      region,
      // we set rate limit to support the flushTimeout
      // on backend, the rate limit would be ∞
      rateLimitRps: environment === 'client' ? 1000 / flushTimeoutMilliseconds : Number.POSITIVE_INFINITY,
      // the request is queued or in flight in memory to be sent.
      // max memory consumption is 50MB
      maxOpenRequests: (50 * 1024) / (estEventSizeKb * maxBatchSize),
      logger,
    });
    return new Confidence({
      environment: environment,
      flagResolverClient,
      eventSenderEngine,
      timeout,
      logger,
      clientSecret,
    });
  }