Struct FallbackLayer

pub struct FallbackLayer { /* private fields */ }

Fallback layer for transparent transport failover. This layer will consume a list of transports to provide better availability and reliability.

The FallbackService will attempt to make requests to multiple transports in parallel, and return the first successful response.

If all transports fail, the fallback service will return an error.

Automatic Transport Ranking

Each transport is automatically ranked based on latency & stability using a weighted algorithm. By default:

• Stability (success rate) is weighted at 70%
• Latency (response time) is weighted at 30%
• The active_transport_count parameter controls how many transports are queried at any one time.

Implementations

impl FallbackLayer

pub const fn with_active_transport_count(self, count: NonZeroUsize) -> Self

Set the number of active transports to use (must be greater than 0)

Trait Implementations

impl Clone for FallbackLayer

fn clone(&self) -> FallbackLayer

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for FallbackLayer

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for FallbackLayer

fn default() -> Self

Returns the “default value” for a type.

impl<S> Layer<Vec<S>> for FallbackLayer

where S: Service<RequestPacket, Future = TransportFut<'static>, Error = TransportError> + Send + Clone + Debug + 'static,

type Service = FallbackService<S>

The wrapped service

fn layer(&self, inner: Vec<S>) -> Self::Service

Wrap the given service with the middleware, returning a new service that has been decorated with the middleware.