Struct RoundRobin 

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

A round-robin load balancer that selects entries in sequential order.

Implementations

impl<T> RoundRobin<T>

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

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

Create a new RoundRobin from a list of values.

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

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

Update the inner state using an async callback.

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

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

Spawn a background task that calls handler every interval.

The handler is called once immediately; if that initial call fails the error is returned and no background task is spawned.

Trait Implementations

impl<T> Clone for RoundRobin<T>

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

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

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T> LoadBalancer<T> for RoundRobin<T>

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

async fn alloc(&self) -> T

Asynchronously allocate the next entry in sequence.

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

Try to allocate the next entry in sequence without awaiting.