Reference

📘 Flagship SDK Reference

Please refer to the JS SDK Documentation for Flagship classes

ABTastyProvider class

The ABTastyProvider implements the OpenFeature Provider interface and is responsible for:

• Initializing the Flagship Client: It starts the Flagship client using the provided environment ID, API key, and correct config.

• Creating a Visitor: It instantiates a visitor with context details (e.g., targetingKey, user context), fetches the associated flags, and updates context (if needed).

• Logging Adaptation: Uses an AdapterLogger to map Flagship logging to the OpenFeature Logger interface.

• Delegating Resolution: Delegates flag resolution tasks to the ABTastyResolver, which performs the resolution based on visitor context.

Key Methods

constructor(envId: string, apiKey: string, config?: IFlagshipConfig, logger?: OpenFeatureLogger)

• Description: Initializes the Flagship client. It:

  • Starts the Flagship client using the provided environment ID and API key.

• Arguments:

Name	Type	Required	Description
envId	String	Required	Environment ID provided by Flagship.
apiKey	String	Required	Api authentication key provided by Flagship.
config	Object	Optional	Custom flagship configuration. see SDK configuration
logger	Object	Optional	AdapterLogger instance.

Example:

const {
    ABTastyProvider,
} = require("@flagship.io/openfeature-provider-js");

// Step 1: Start the OpenFeature SDK by providing the environment ID and API key
let provider = new ABTastyProvider("<ENV_ID>", "<API_KEY>");

initialize(context?: EvaluationContext)

• Description: Internally called by the OpenFeature class when the provider is set and initializes the visitor. It:

  • Creates a new visitor with the given evaluation context.

  • Fetches feature flags.

  • Instantiates the ABTastyResolver.

  • Emits the provider's Ready event.

• Arguments:

  • context: Optional context (e.g., targeting key and additional user data).

• Returns:

  • A promise that resolves when initialization completes.

Example:

const {
    ABTastyProvider,
} = require("@flagship.io/openfeature-provider-js");
const { OpenFeature } = require("@openfeature/server-sdk");

// Step 1: Start the OpenFeature SDK by providing the environment ID and API key
let provider = new ABTastyProvider("<ENV_ID>", "<API_KEY>");

// Step 2: Set Flagship SDK as provider
await OpenFeature.setProviderAndWait(provider);

getConfig(): IFlagshipConfig

• Description: Retrieves the current configuration settings used by the Flagship client.

• Returns:

  • The configuration object (IFlagshipConfig).

close(): Promise<void>

• Description: Gracefully shuts down the Flagship client connection.

• Returns:

  • A promise that resolves when the client has successfully closed.