Struct Cooldown 

pub struct Cooldown<T>
where
    T: Send + Sync + Clone + 'static,
{ /* private fields */ }

A load balancer that allocates items based on a cooldown interval. Each entry can only be reused after its interval has elapsed since the last allocation.

Implementations

impl<T> Cooldown<T>

where T: Send + Sync + Clone + 'static,

pub fn new(entries: Vec<(Duration, T)>) -> Self

Create a new Cooldown with a list of (interval, value) pairs. Each value will only be available after its interval has passed since the last allocation.

pub async fn update<F, R, N>(&self, handler: F) -> Result<N>

where F: Fn(Arc<RwLock<Vec<Entry<T>>>>) -> R, R: Future<Output = Result<N>>,

Update the internal entries using an async callback. This allows dynamic reconfiguration of the load balancer.

pub async fn update_timer<F, R>( &self, handler: F, interval: Duration, ) -> Result<JoinHandle<()>>

where F: Fn(Arc<RwLock<Vec<Entry<T>>>>) -> R + Send + Sync + 'static, R: Future<Output = Result<()>> + Send,

Spawn a background task that calls handler every interval.

Trait Implementations

impl<T> Clone for Cooldown<T>

where T: Send + Sync + Clone + 'static + Clone,

fn clone(&self) -> Cooldown<T>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T> LoadBalancer<T> for Cooldown<T>

where T: Send + Sync + Clone + 'static,

fn alloc(&self) -> impl Future<Output = T> + Send

Allocate a value asynchronously. This will loop until a value becomes available, yielding in between attempts.

fn try_alloc(&self) -> Option<T>

Try to allocate a value immediately without waiting. Returns Some(value) if an entry is available (interval elapsed), otherwise returns None.