Struct RenewalPolicy 

pub struct RenewalPolicy {
    pub renew_at_fraction: f64,
    pub jitter_fraction: f64,
    pub min_renew_secs: u64,
    pub max_backoff_secs: u64,
}

Controls when a lease should be renewed and how to handle failures.

The manager checks each lease on every tick(). A lease is due for renewal when:

remaining_ttl <= total_ttl * (1.0 - renew_at_fraction) +/- jitter

On failure, the manager applies exponential backoff up to max_backoff_secs.

Fields

renew_at_fraction: f64

Fraction of TTL at which to trigger renewal (default 0.75).

A value of 0.75 means “renew when 75% of the TTL has elapsed” (i.e. 25% remaining).

jitter_fraction: f64

Random jitter as a fraction of total TTL (default 0.10).

The actual renewal threshold is shifted by up to this fraction in either direction for stagger.

min_renew_secs: u64

Minimum renewal duration in seconds (default 30).

max_backoff_secs: u64

Maximum backoff delay in seconds on renewal failure (default 5).

Implementations

impl RenewalPolicy

pub fn renewal_deadline( &self, created_at: u64, expires_at: u64, jitter_seed: u64, ) -> u64

Compute the absolute unix timestamp at which renewal should fire, given created_at and expires_at.

jitter_seed is a deterministic value (e.g. lease_id bits) used to compute jitter without requiring a PRNG.

Trait Implementations

impl Clone for RenewalPolicy

fn clone(&self) -> RenewalPolicy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RenewalPolicy

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

Formats the value using the given formatter.

impl Default for RenewalPolicy

fn default() -> Self

Returns the “default value” for a type.

impl Copy for RenewalPolicy