Struct BackoffState 

pub struct BackoffState { /* private fields */ }

Mutable state tracker for an individual service’s backoff history.

One BackoffState instance is maintained per supervised service inside the JanusSupervisor.

Implementations

impl BackoffState

pub fn new(config: BackoffConfig) -> Self

Create a fresh backoff state with the given configuration.

pub fn with_defaults() -> Self

Create with default configuration.

pub fn record_start(&mut self)

Record that the service has started (or restarted) successfully.

Called by the supervisor when a service’s run() method is entered.

pub fn maybe_reset_on_cooldown(&mut self)

Check if the cooldown period has elapsed since the last start, and if so, reset the attempt counter.

Called by the supervisor when a service exits so that a service which ran healthily for a long time doesn’t carry old failure history into its next restart.

pub fn next_backoff(&mut self) -> BackoffAction

Record a failure and compute the next action.

Returns BackoffAction::Retry with the jittered delay, or BackoffAction::CircuitOpen if the circuit breaker has tripped.

pub fn reset(&mut self)

Reset all state (attempt counter, failure history, start time).

pub fn attempt(&self) -> u32

Current attempt number (consecutive failures since last reset).

pub fn recent_failures(&self) -> usize

Number of failures recorded within the circuit-breaker window.

Trait Implementations

impl Clone for BackoffState

fn clone(&self) -> BackoffState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BackoffState

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

Formats the value using the given formatter.