Struct RequestConcurrencyLimit 

pub struct RequestConcurrencyLimit { /* private fields */ }

Load-shedding middleware: bounds the number of requests in flight and rejects the excess with an explicit 429 Too Many Requests + Retry-After, instead of letting them queue silently on the DB pool until a client timeout or an upstream 502 (see module docs above).

Implementations

impl RequestConcurrencyLimit

pub fn new(config: ConcurrencyLimitConfig) -> Self

Trait Implementations

impl Clone for RequestConcurrencyLimit

fn clone(&self) -> RequestConcurrencyLimit

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<S, B> Transform<S, ServiceRequest> for RequestConcurrencyLimit

where S: Service<ServiceRequest, Response = ServiceResponse<B>, Error = Error> + 'static, S::Future: 'static, B: MessageBody + 'static,

type Response = ServiceResponse<EitherBody<B>>

Responses produced by the service.

type Error = Error

Errors produced by the service.

type InitError = ()

Errors produced while building a transform service.

type Transform = RequestConcurrencyLimitMiddleware<S>

The TransformService value created by this factory

type Future = Ready<Result<<RequestConcurrencyLimit as Transform<S, ServiceRequest>>::Transform, <RequestConcurrencyLimit as Transform<S, ServiceRequest>>::InitError>>

The future response value.

fn new_transform(&self, service: S) -> Self::Future

Creates and returns a new Transform component, asynchronously