OpenFeature Provider for Java SDK

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

Integrate your Java applications with Harness FME using the Java OpenFeature Provider, a standardized, vendor-agnostic feature flagging API. This provider implements the OpenFeature specification and bridges the OpenFeature SDK with the Harness FME Java SDK.

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

Before you begin

Before you begin, ensure you have the following:

• A valid Harness FME SDK key for your project

• A Java environment running version 11 or later

• Access to your Maven build configuration

Version compatibility

Component	Minimum Version
Java	11+
@splitsoftware/split-openfeature-provider-java	≥ 1.2.1
OpenFeature Java SDK	≥ 1.0.0

Install the provider and dependencies

Add the Harness FME OpenFeature provider dependency to your Maven build configuration.

<dependency>
    <groupId>io.split.openfeature</groupId>
    <artifactId>split-openfeature-provider</artifactId>
    <version>1.2.1</version>
</dependency>

Initialize the provider

You can instantiate and register the provider using your Harness FME SDK key.

import dev.openfeature.sdk.OpenFeatureAPI;
import io.split.openfeature.SplitProvider;

OpenFeatureAPI api = OpenFeatureAPI.getInstance();
api.setProviderAndWait(new SplitProvider("<YOUR_API_KEY>"));

Alternatively, if you want more control or need advanced initialization, you can create a SplitClient and provide it directly:

import dev.openfeature.sdk.OpenFeatureAPI;
import io.split.openfeature.SplitProvider;
import io.split.client.SplitClient;
import io.split.client.SplitClientConfig;
import io.split.client.SplitFactoryBuilder;

OpenFeatureAPI api = OpenFeatureAPI.getInstance();


SplitClientConfig config = SplitClientConfig.builder()
   .setBlockUntilReadyTimeout(10000)
   .build();
SplitClient splitClient = SplitFactoryBuilder.build("<YOUR_API_KEY>", config).client();
api.setProviderAndWait(new SplitProvider(splitClient));

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.

For example:

Client client = api.getClient("CLIENT_NAME");

EvaluationContext context = new MutableContext("<TARGETING_KEY>");
Boolean boolValue = client.getBooleanValue("boolFlag", false, context);

If the same targeting key is reused across evaluations, set the context at the client or API level:

EvaluationContext context = new MutableContext("<TARGETING_KEY>");
client.setEvaluationContext(context)

Or globally:

EvaluationContext context = new MutableContext("<TARGETING_KEY>");
OpenFeatureAPI.getInstance().setEvaluationContext(context)

Once the context is set at the client or API level, you don’t need to provide it for each evaluation.

Evaluate with details

Use the get*Details(...) APIs to get flag values and metadata (such as variant, reason, error code, and configuration). The FME treatment configuration is returned as a raw JSON string under flagMetadata["config"].

For example:

// boolean/string/number/object all have *Details variants:
FlagEvaluationDetails<String> details =
    client.getStringDetails("my-flag", "fallback", ctx);

String jsonConfig = details.getFlagMetadata().getString("config"); // ← Split treatment config

Track events

The Harness FME OpenFeature provider supports tracking user actions or conversion events directly from your Java application.

To enable event tracking, your evaluation context must include the following:

• A non-empty targetingKey

• A trafficType (for example, "user" or "account")

• A non-blank event name

Optionally, you can include a numeric value and additional event properties. For more information, see Sending Events.

For example:

MutableContext ctx = new MutableContext("user-123");
ctx.add("trafficType", new Value("user"));

TrackingEventDetails details = new MutableTrackingEventDetails(19.99)
    .add("plan", new Value("pro"))
    .add("coupon", new Value("WELCOME10"));

client.track("checkout.completed", ctx, details);

For more information, go to the Harness FME Java OpenFeature Provider GitHub repository.