Enum CircuitState 

pub enum CircuitState {
    Closed,
    Open {
        opened_at: Instant,
    },
    HalfOpen,
}

Tracks failure rates and opens when the threshold is exceeded.

States: Closed (normal) → Open (fast-fail) → HalfOpen (probe).

Note: PartialEq is implemented manually because the Open variant contains std::time::Instant which does not implement Eq. The manual implementation compares only the variant discriminant, not the timestamp.

Variants

Closed

Circuit is operating normally; requests pass through.

Open

Circuit has tripped; requests are fast-failed without calling the operation.

Fields

opened_at: Instant

The instant at which the circuit was opened.

HalfOpen

Recovery probe period; the next request will be attempted to test recovery.

Trait Implementations

impl Clone for CircuitState

fn clone(&self) -> CircuitState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CircuitState

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

Formats the value using the given formatter.

impl Display for CircuitState

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

Render as "Closed", "Open", or "HalfOpen".

impl PartialEq for CircuitState

fn eq(&self, other: &Self) -> 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 CircuitState