Trait tower_http::trace::OnFailure

pub trait OnFailure<FailureClass> {
    fn on_failure(
        &mut self, 
        failure_classification: FailureClass, 
        latency: Duration, 
        span: &Span
    );
}

This is supported on crate feature trace only.

Trait used to tell Trace what to do when a request fails.

See the module docs for details on exactly when the on_failure callback is called.

Required methods

fn on_failure(
    &mut self,
    failure_classification: FailureClass,
    latency: Duration,
    span: &Span
)

Do the thing.

latency is the duration since the request was received.

span is the tracing Span, corresponding to this request, produced by the closure passed to TraceLayer::make_span_with. It can be used to record field values that weren’t known when the span was created.

Implementations on Foreign Types

impl<FailureClass> OnFailure<FailureClass> for ()

fn on_failure(&mut self, _: FailureClass, _: Duration, _: &Span)

Implementors

impl<F, FailureClass> OnFailure<FailureClass> for F where
    F: FnMut(FailureClass, Duration, &Span), 

impl<FailureClass> OnFailure<FailureClass> for DefaultOnFailure where
    FailureClass: Display,