Enum DbErrorKind 

#[non_exhaustive]
pub enum DbErrorKind {
    Retry,
    Lagged,
    Closed,
    Transport,
    Data,
    Configuration,
    Usage,
    Internal,
}

What a caller does about a DbError: retry, resubscribe, stop, or fix something — and which something.

Match on this rather than on DbError’s variants when you only need to know what to do. A new variant is a compile error in DbError::kind rather than a silent reclassification at every downstream wildcard.

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.

Retry

Nothing available, or no room, right now. Retry.

Lagged

Values dropped because this reader fell behind. Note the gap, continue.

Closed

The database or buffer is shutting down. Stop; retrying cannot help.

Transport

An I/O or connection failure. Retry, or fix the deployment.

Data

A payload could not be encoded or decoded. Fix the schema or the sender.

Configuration

The record graph is misconfigured. Fix it before starting.

Usage

This call was wrong for this record. Fix the call site.

Internal

The database’s own machinery or its host. Report a bug.

Trait Implementations

impl Clone for DbErrorKind

fn clone(&self) -> DbErrorKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for DbErrorKind

impl Debug for DbErrorKind

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

Formats the value using the given formatter.

impl Eq for DbErrorKind

impl Hash for DbErrorKind

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for DbErrorKind

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for DbErrorKind