Unofficial Unleash OpenFeature Provider for Java

Unleash OpenFeature Provider can provide usage for Unleash via OpenFeature Java SDK.

Installation

<dependency>
    <groupId>dev.openfeature.contrib.providers</groupId>
    <artifactId>unleash</artifactId>
    <version>0.1.0-alpha</version>
</dependency>

Concepts

Boolean evaluation gets feature enabled status.
String evaluation gets feature variant value.

Usage

Unleash OpenFeature Provider is using Unleash Java SDK.

Usage Example

FeatureProvider unleashProvider = new UnleashProvider(unleashProviderConfig);
OpenFeatureAPI.getInstance().setProviderAndWait(unleashProvider);
boolean featureEnabled = client.getBooleanValue(FLAG_NAME, false);

// Context parameters are optional, not mandatory to fill all parameters
MutableContext evaluationContext = new MutableContext();
evaluationContext.add("userId", userIdValue);
evaluationContext.add("currentTime", String.valueOf(currentTimeValue));
evaluationContext.add("sessionId", sessionIdValue);
evaluationContext.add("remoteAddress", remoteAddressValue);
evaluationContext.add("environment", environmentValue);
evaluationContext.add("appName", appNameValue);
evaluationContext.add(customPropertyKey, customPropertyValue);
featureEnabled = client.getBooleanValue(FLAG_NAME, false, evaluationContext);

String variantValue = client.getStringValue(FLAG_NAME, "");

See UnleashProviderTest.java for more information.

Additional Usage Details

When default value is used and returned, default variant is not used and variant name is not set.
json/csv payloads are evaluated via object evaluation as what returned from Unleash - string, wrapped with Value.
Additional evaluation data can be received via flag metadata, such as:
- enabled - boolean
- variant-stickiness - string
- payload-type - string, optional

Unleash Provider Tests Strategies

Unit test based on Unleash instance with Unleash features schema file, with WireMock for API mocking.
See UnleashProviderTest.java for more information.