Enum LockError 

pub enum LockError {
    Deadlock {
        victim: u64,
        cycle: String,
    },
    DeadlineExceeded,
    Cancelled,
    InvalidRequest(String),
}

A failed lock acquisition.

The taxonomy category of each variant is available through Self::category; conversion to MongrelError maps onto the closest existing variant (see the module docs for the deadlock mapping).

Variants

Deadlock

The transaction was chosen as the deterministic deadlock victim; retry the whole transaction.

Fields

victim: u64

The doomed transaction (always the receiver of this error).

cycle: String

The wait-for cycle, a → b → …, each waiting on the next.

DeadlineExceeded

The lock-wait deadline (or the control’s own deadline) expired.

Cancelled

The wait was cancelled through its ExecutionControl.

InvalidRequest(String)

The request violates the usage contract (e.g. a second in-flight wait for the same transaction on the same key).

Implementations

impl LockError

pub fn category(&self) -> ErrorCategory

The stable cross-language taxonomy category of this failure (spec section 9.7); identical to the category of the MongrelError produced by the bridge below.

Trait Implementations

impl Clone for LockError

fn clone(&self) -> LockError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LockError

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

Formats the value using the given formatter.

impl Display for LockError

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

Formats the value using the given formatter.

impl Eq for LockError

impl Error for LockError

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<LockError> for MongrelError

fn from(error: LockError) -> Self

Maps onto the matching MongrelError variant. A deadlock becomes MongrelError::Deadlock — victim and cycle preserved — so callers see the precise ErrorCategory::Deadlock with the same retry-the-whole-transaction discipline as Conflict.

impl PartialEq for LockError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for LockError