Struct DbFeatureDriver 

#[non_exhaustive]
pub struct DbFeatureDriver { /* private fields */ }

Feature flag driver backed by a database table rullst_feature_flags.

Features a high-performance concurrent local cache with custom TTL to ensure sub-millisecond lookups.

Note on Database Pool Initialization

This driver requires a live database pool to function. If feature flags are evaluated before the database connection pool has been initialized (e.g., in early application startup or static constructors), this driver will gracefully return None (falling through to subsequent drivers in the chain) rather than blocking or panicking.

Implementations

impl DbFeatureDriver

pub fn new() -> Self

Creates a new DbFeatureDriver with a default cache TTL of 5 seconds.

pub fn with_ttl(ttl: Duration) -> Self

Creates a new DbFeatureDriver with a custom cache TTL duration.

Trait Implementations

impl Default for DbFeatureDriver

fn default() -> Self

Returns the “default value” for a type.

impl FeatureDriver for DbFeatureDriver

fn enabled<'life0, 'life1, 'async_trait>( &'life0 self, flag: &'life1 str, ) -> Pin<Box<dyn Future<Output = Option<bool>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Check if a feature flag is enabled.

fn enabled_for<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, flag: &'life1 str, identifier: &'life2 str, ) -> Pin<Box<dyn Future<Output = Option<bool>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait,

Check if a feature flag is enabled for a specific target identifier.

fn variant<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, flag: &'life1 str, identifier: &'life2 str, ) -> Pin<Box<dyn Future<Output = Option<String>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait,

Retrieve the variation name assigned to a specific target identifier.