Ping (ForgeRock) Authenticator module

public interface StorageClient {
    /**
     * Get the Account object with its id
     * @param accountId The account unique ID
     * @return The account object.
     */
    Account getAccount(String accountId);
    /**
     * Get all accounts stored in the system.
     * @return The complete list of accounts.
     */
    List<Account> getAllAccounts();
    /**
     * Delete the Account that was passed in.
     * @param account The account object to delete.
     * @return boolean as result of the operation
     */
    boolean removeAccount(Account account);
    /**
     * Add or Update the Account to the storage system.
     * @param account The Account to store or update.
     * @return boolean as result of the operation
     */
    boolean setAccount(Account account);
    /**
     * Get the mechanisms associated with an account.
     * @param account The Account object
     * @return The list of mechanisms for the account.
     */
    List<Mechanism> getMechanismsForAccount(Account account);
    /**
     * Get the mechanism by UUID.
     * @param mechanismUID The uniquely identifiable UUID for the mechanism
     * @return The mechanism object.
     */
    Mechanism getMechanismByUUID(String mechanismUID);
    /**
     * Delete the mechanism uniquely identified by an id.
     * @param mechanism The mechanism object to delete.
     * @return boolean as result of the operation
     */
    boolean removeMechanism(Mechanism mechanism);
    /**
     * Add or update the mechanism to the storage system.
     * If the owning Account is not yet stored, store that as well.
     * @param mechanism The mechanism to store or update.
     * @return boolean as result of the operation
     */
    boolean setMechanism(Mechanism mechanism);
    /**
     * Get all notifications for within the mechanism.
     * @param mechanism The mechanism object
     * @return The list of notifications for the mechanism.
     */
    List<PushNotification> getAllNotificationsForMechanism(Mechanism mechanism);
    /**
     * Delete the pushNotification uniquely identified by an id.
     * @param pushNotification The pushNotification object to delete.
     */
    boolean removeNotification(PushNotification pushNotification);
    /**
     * Add or update the pushNotification to the storage system.
     * @param pushNotification The pushNotification to store.
     * @return boolean as result of the operation
     */
    boolean setNotification(PushNotification pushNotification);
    /**
     * Whether the storage system currently contains any data.
     * @return True if the storage system is empty, false otherwise.
     */
    boolean isEmpty();
}

//Initiate your custom StorageClient
StorageClient customStorageClient = CustomStorageClient()

//Register it to FRAClient
FRAClient fraClient = new FRAClient.FRAClientBuilder()
                .withContext(this)
                .withStorage(customStorageClient)
                .start();

/// StorageClient protocol represents predefined interfaces and protocols for FRAuthenticator's storage method.
public protocol StorageClient {

    /// Stores Account object into Storage Client and returns discardable Boolean result of operation.
    /// - Parameter account: Account object to store.
    @discardableResult func setAccount(account: Account) -> Bool

    /// Removes Account object from Storage Client, and returns discardable Boolean result of operation.
    /// - Parameter account: Account object to remove.
    @discardableResult func removeAccount(account: Account) -> Bool

    /// Retrieves Account object with its unique identifier.
    /// - Parameter accountIdentifier: String value of Account's unique identifier.
    func getAccount(accountIdentifier: String) -> Account?

    /// Retrieves all Account objects stored in Storage Client.
    func getAllAccounts() -> [Account]

    /// Stores Mechanism object into Storage Client, and returns discardable Boolean result of operation.
    /// - Parameter mechanism: Mechanism object to store.
    @discardableResult func setMechanism(mechanism: Mechanism) -> Bool

    /// Removes Mechanism object from Storage Client, and returns discardable Boolean result of operation.
    /// - Parameter mechanism: Mechanism object to remove.
    @discardableResult func removeMechanism(mechanism: Mechanism) -> Bool

    /// Retrieves all Mechanism objects stored in Storage Client.
    /// - Parameter account: Account object that is associated with Mechanism(s).
    func getMechanismsForAccount(account: Account) -> [Mechanism]

    /// Retrieves Mechanism object with given Mechanism UUID.
    /// - Parameter uuid: UUID of Mechanism.
    func getMechanismForUUID(uuid: String) -> Mechanism?

    /// Stores PushNotification object into Storage Client, and returns discardable Boolean result of operation.
    /// - Parameter notification: PushNotification object to store.
    @discardableResult func setNotification(notification: PushNotification) -> Bool

    /// Removes PushNotification object from Storage Client, and returns discardable Boolean result of operation.
    /// - Parameter notification: PushNotification object to remove.
    @discardableResult func removeNotification(notification: PushNotification) -> Bool

    /// Retrieves all Notification objects from Storage Client with given Mechanism object.
    /// - Parameter mechanism: Mechanism object that is associated with Notification(s).
    func getAllNotificationsForMechanism(mechanism: Mechanism) -> [PushNotification]

    /// Returns whether or not StorageClient has any data stored.
    @discardableResult func isEmpty() -> Bool
}

// Initiate your custom StorageClient
let customStorageClient = CustomStorageClient()
// Register it with your FRAClient
FRAClient.setStorage(storage: customStorageClient)
// Initiate the SDK
FRAClient.start()