Struct RedeliveryPolicy 

pub struct RedeliveryPolicy {
    pub max_attempts: u32,
    pub initial_delay: Duration,
    pub multiplier: f64,
    pub max_delay: Duration,
    pub jitter_factor: f64,
}

Redelivery policy with exponential backoff and optional jitter.

Fields

max_attempts: u32

initial_delay: Duration

multiplier: f64

max_delay: Duration

jitter_factor: f64

Implementations

impl RedeliveryPolicy

pub fn new(max_attempts: u32) -> Self

Create a new policy with default delays (100ms initial, 2x multiplier, 10s max, no jitter).

Note: max_attempts = 0 means no retries (immediate failure to DLC/handler). Use max_attempts > 0 to enable retry behavior.

pub fn with_initial_delay(self, d: Duration) -> Self

Override the initial delay before the first retry.

pub fn with_multiplier(self, m: f64) -> Self

Override the backoff multiplier applied after each attempt.

pub fn with_max_delay(self, d: Duration) -> Self

Cap the maximum delay between retries.

pub fn with_jitter(self, j: f64) -> Self

Set jitter factor (0.0 = no jitter, 0.2 = ±20% randomization).

Recommended values: 0.1-0.3 (10-30%) for most use cases. Helps prevent thundering herd problems in distributed systems by adding randomization to retry timing.

pub fn delay_for(&self, attempt: u32) -> Duration

Compute the sleep duration before retry attempt N (0-indexed) with jitter applied.

Trait Implementations

impl Clone for RedeliveryPolicy

fn clone(&self) -> RedeliveryPolicy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RedeliveryPolicy

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

Formats the value using the given formatter.