Struct CircuitBreaker 

pub struct CircuitBreaker { /* private fields */ }

Per-service circuit breaker: rolling-window error-rate trip, single-probe half-open. Cheaply cloneable; clones share one state machine.

Implementations

impl CircuitBreaker

pub fn new(service_id: String) -> Self

Create a breaker for service_id with default tuning and no metrics.

pub fn with_config( service_id: String, config: CircuitBreakerConfig, metrics: Option<ServiceMetrics>, ) -> Self

Create a breaker with explicit tuning and an optional metrics sink for state-transition counters.

pub fn is_open(&self) -> bool

Whether the circuit is currently rejecting calls.

A single probe is admitted when the cooldown elapses: the first caller after cooldown transitions Open → HalfOpen and is let through (false); every other caller is rejected (true) until that probe resolves via Self::record_success or Self::record_failure.

pub fn record_success(&self)

Record a successful call. In half-open this closes the breaker and clears the rolling window.

pub fn record_failure(&self)

Record a failed call. Trips Closed → Open when the rolling-window error rate crosses the threshold, and re-opens immediately on a failed half-open probe.

pub fn state(&self) -> &'static str

Current state as a string ("closed", "open", "half_open").

Trait Implementations

impl Clone for CircuitBreaker

fn clone(&self) -> CircuitBreaker

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CircuitBreaker

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

Formats the value using the given formatter.