Struct ExtendedTtlPolicy 

pub struct ExtendedTtlPolicy {
    pub idle_ttl_ms: Option<u64>,
    pub stale_serve_ms: Option<u64>,
    pub jitter_pct: u8,
}

Extended TTL configuration that augments a base [BlobCachePolicy].

Construct via field literal or ExtendedTtlPolicy::off. All three knobs are independently optional / zero-able; Self::is_active reports whether any of them affects expiry decisions.

Fields

idle_ttl_ms: Option<u64>

Sliding expiry: if the entry has not been accessed within this many milliseconds, it is considered expired even if hard TTL has not passed. None disables idle expiry.

stale_serve_ms: Option<u64>

Stale-while-revalidate window in milliseconds. After the hard expiry, the entry can still be served as ExpiryDecision::Stale for this many milliseconds before becoming ExpiryDecision::Expired. None disables the SWR window (hard expiry → immediate Expired).

jitter_pct: u8

Jitter percentage applied at insert time, clamped to 0..=100. 0 disables jitter; values above 100 are treated as 100.

Implementations

impl ExtendedTtlPolicy

pub fn off() -> ExtendedTtlPolicy

Returns the no-op extended policy: no idle, no SWR, no jitter. In this state, EffectiveExpiry::compute reduces to a pure hard-expiry check.

pub fn is_active(&self) -> bool

Reports whether this policy alters expiry behaviour relative to raw hard-expiry semantics.

Trait Implementations

impl Clone for ExtendedTtlPolicy

fn clone(&self) -> ExtendedTtlPolicy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ExtendedTtlPolicy

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

Formats the value using the given formatter.

impl Default for ExtendedTtlPolicy

fn default() -> ExtendedTtlPolicy

Returns the “default value” for a type.

impl PartialEq for ExtendedTtlPolicy

fn eq(&self, other: &ExtendedTtlPolicy) -> 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 Copy for ExtendedTtlPolicy

impl Eq for ExtendedTtlPolicy

impl StructuralPartialEq for ExtendedTtlPolicy