Trait tower_http::classify::ClassifyEos

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pub trait ClassifyEos {
    type FailureClass;

    // Required methods
    fn classify_eos(
        self,
        trailers: Option<&HeaderMap>
    ) -> Result<(), Self::FailureClass>;
    fn classify_error<E>(self, error: &E) -> Self::FailureClass
       where E: Display + 'static;

    // Provided method
    fn map_failure_class<F, NewClass>(self, f: F) -> MapFailureClass<Self, F>
       where Self: Sized,
             F: FnOnce(Self::FailureClass) -> NewClass { ... }
}
Expand description

Trait for classifying end of streams (EOS) as either success or failure.

Required Associated Types§

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type FailureClass

The type of failure classifications.

Required Methods§

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fn classify_eos( self, trailers: Option<&HeaderMap> ) -> Result<(), Self::FailureClass>

Perform the classification from response trailers.

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fn classify_error<E>(self, error: &E) -> Self::FailureClasswhere E: Display + 'static,

Classify an error.

Errors are always errors (doh) but sometimes it might be useful to have multiple classes of errors. A retry policy might allow retrying some errors and not others.

Provided Methods§

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fn map_failure_class<F, NewClass>(self, f: F) -> MapFailureClass<Self, F>where Self: Sized, F: FnOnce(Self::FailureClass) -> NewClass,

Transform the failure classification using a function.

See ClassifyResponse::map_failure_class for more details.

Implementors§