OpenFeature Provider for Dart SDK

Integrate OpenFeature with Harness FME in your Dart applications to evaluate feature flags, manage contexts, and track events using a standardized SDK.

Integrate OpenFeature with Harness FME in your Dart and Flutter applications to evaluate feature flags using a standardized, vendor-agnostic SDK.

Integrate your Dart and Flutter applications with Harness FME using the Dart OpenFeature Provider, split_openfeature_provider_dart_client. This provider implements the OpenFeature specification and bridges the OpenFeature client-side API with the Harness FME Dart Client SDK (splitio_client_side).

This page walks you through installing, configuring, and using the Dart OpenFeature provider to evaluate feature flags in your application.

All of our SDKs are open source. Go to our Dart OpenFeature Provider GitHub repository to see the source code, or view the package on pub.dev.

Before you begin

• A valid Harness FME client-side SDK key for your project

• Dart SDK v3.0.0 or later

Version compatibility

Component	Minimum Version
split_openfeature_provider_dart_client	^0.1.0
openfeature_dart_client_sdk	^0.0.1-beta.1
splitio_client_side	^1.1.0

Install the provider and dependencies

All three packages below are required peer dependencies. Add them to your pubspec.yaml file:

dependencies:
  split_openfeature_provider_dart_client: ^0.1.0
  openfeature_dart_client_sdk: ^0.0.1-beta.1
  splitio_client_side: ^1.1.0

Initialize the provider

Register the Harness FME OpenFeature provider by using a SplitFactory instance.

import 'package:openfeature_dart_client_sdk/openfeature_dart_client_sdk.dart';
import 'package:split_openfeature_provider_dart_client/split_openfeature_provider_dart_client.dart';
import 'package:splitio_client_side/splitio_client_side.dart'
    show SplitFactory, SplitClientConfig;

Future<void> main() async {
  final splitFactory = SplitFactory.create(
    'CLIENT_SIDE_SDK_KEY',
    SplitClientConfig(),
    'TARGETING_KEY',
  );

  final provider = OpenFeatureSplitProvider(splitFactory);
  await OpenFeatureAPI.instance.setProviderAndWait(provider);

  final client = OpenFeatureAPI.instance.getClient();
}

Construct an evaluation context

Provide an evaluation context with a targeting key to evaluate flags. The evaluation context passes targeting information such as user IDs, email addresses, or plan types for flag targeting.

await OpenFeatureAPI.instance.setEvaluationContextAndWait(
  EvaluationContext(targetingKey: 'TARGETING_KEY'),
);

Evaluate flags

Use the standard OpenFeature client API to evaluate flags, rather than calling the underlying splitio_client_side SDK directly.

final showBanner = client.getBooleanValue('show_banner', false);

For more information, go to the Harness FME Dart OpenFeature Provider GitHub repository, or read more about the OpenFeature specification.

Reference links

• Repo: https://github.com/splitio/split-openfeature-provider-dart-client

• Issues: https://github.com/splitio/split-openfeature-provider-dart-client/issues

• Pub.dev: https://pub.dev/packages/split_openfeature_provider_dart_client

• OpenFeature spec: https://openfeature.dev/docs/reference/concepts/provider

Questions or feedback? Reach out to your Harness account team, or open an issue in the GitHub repository above.