Enum BackendErrorKind 

#[non_exhaustive]
pub enum BackendErrorKind {
    Transient,
    Permanent,
    Timeout,
    Authentication,
}

Classifies backend errors to determine retry behaviour.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Transient

Temporary failure — safe to retry (network blip, pool exhaustion).

Permanent

Permanent failure — retrying will not help (bad request, key not found).

Timeout

Request did not complete within the deadline — safe to retry.

Authentication

Credentials are invalid or missing — retrying will not help.

Implementations

impl BackendErrorKind

pub fn is_retryable(&self) -> bool

Returns true if it is safe to retry the operation.

Trait Implementations

impl Clone for BackendErrorKind

fn clone(&self) -> BackendErrorKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BackendErrorKind

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

Formats the value using the given formatter.

impl Display for BackendErrorKind

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

Formats the value using the given formatter.

impl PartialEq for BackendErrorKind

fn eq(&self, other: &BackendErrorKind) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for BackendErrorKind

impl StructuralPartialEq for BackendErrorKind