Enum PersistenceError 

#[non_exhaustive]
pub enum PersistenceError {
    LockHeld {
        key: String,
    },
    LockAcquireTimeout {
        key: String,
        attempts: u32,
    },
    SchemaVersionMismatch {
        payload: u32,
        min: u32,
        current: u32,
    },
    Config(String),
    Backend(String),
    Serde(Error),
}

Errors that the persistence layer surfaces to its callers.

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.

LockHeld

The lock was held by another process when a non-blocking try_acquire returned. Carries the lock key for diagnostics.

Fields

key: String

Lock key that could not be acquired.

LockAcquireTimeout

The lock could not be acquired within the configured deadline.

Fields

key: String

Lock key that timed out.

attempts: u32

Attempt count that was exhausted.

SchemaVersionMismatch

Schema version mismatch — a payload tagged with a version this build does not understand.

Fields

payload: u32

Version observed in the payload.

min: u32

Lowest version this build accepts.

current: u32

Highest version this build understands.

Config(String)

Configuration mistake — connection string malformed, builder missing required field, etc.

Backend(String)

Generic backend failure — sqlx / redis error, network drop, malformed payload. Contains the original error message.

Serde(Error)

JSON encode/decode failure on a stored payload.

Trait Implementations

impl Debug for PersistenceError

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

Formats the value using the given formatter.

impl Display for PersistenceError

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

Formats the value using the given formatter.

impl Error for PersistenceError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<Error> for PersistenceError

fn from(source: Error) -> Self

Converts to this type from the input type.

impl From<PersistenceError> for Error

fn from(err: PersistenceError) -> Self

Converts to this type from the input type.