Enum StateTransitionError 

pub enum StateTransitionError {
    InvalidPair {
        from: ReplicaRole,
        to: ReplicaRole,
    },
    SignalMismatch {
        from: ReplicaRole,
        to: ReplicaRole,
        signal: TransitionSignal,
    },
}

Result of validating + applying a state transition.

Variants

InvalidPair

(from, to) pair is not in the plan §3 matrix.

Fields

from: ReplicaRole

State the transition started from.

to: ReplicaRole

Attempted target state.

SignalMismatch

Transition pair is valid in some signal context but not for the supplied TransitionSignal. Surfaces the kind of “you used MissedHeartbeats to go Leader → Idle” misuse.

Fields

from: ReplicaRole

State the transition started from.

to: ReplicaRole

Attempted target state.

signal: TransitionSignal

Signal class supplied to StateTransition::apply.

Trait Implementations

impl Clone for StateTransitionError

fn clone(&self) -> StateTransitionError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StateTransitionError

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

Formats the value using the given formatter.

impl Display for StateTransitionError

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

Formats the value using the given formatter.

impl Error for StateTransitionError

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<StateTransitionError> for CoordinatorError

fn from(source: StateTransitionError) -> Self

Converts to this type from the input type.

impl PartialEq for StateTransitionError

fn eq(&self, other: &StateTransitionError) -> 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 Copy for StateTransitionError

impl Eq for StateTransitionError

impl StructuralPartialEq for StateTransitionError