Struct DocCacheTtl 

pub struct DocCacheTtl {
    pub crate_docs_secs: u64,
    pub search_results_secs: u64,
    pub item_docs_secs: u64,
    pub jitter_ratio: f64,
}

Document cache TTL configuration

Configure independent TTL for different document types.

Fields

• crate_docs_secs: Crate document cache duration (seconds)
• search_results_secs: search results cache duration (seconds)
• item_docs_secs: item docs cache duration (seconds)
• jitter_ratio: TTL jitter ratio(0.0-1.0),used to prevent cache stampede

Fields

crate_docs_secs: u64

Crate document TTL (seconds)

search_results_secs: u64

Search results TTL (seconds)

item_docs_secs: u64

Item documentation TTL (seconds)

jitter_ratio: f64

TTL jitter ratio (0.0-1.0), default 0.1 (10%)

Actual TTL = base_ttl * (1 + random(-jitter_ratio, jitter_ratio)) for example:base_ttl=3600, jitter_ratio=0.1 => Actual TTL range [3240, 3960]

Implementations

impl DocCacheTtl

pub fn from_cache_config(config: &CacheConfig) -> Self

Create TTL configuration from CacheConfig

Arguments

• config - cache configuration

Returns

Returns TTL configuration based on config

pub fn apply_jitter(&self, base_ttl: u64) -> u64

Calculate actual TTL with jitter

Arguments

• base_ttl - Base TTL (seconds)

Returns

Returns jittered TTL (seconds)

pub fn crate_docs_duration(&self) -> Duration

Get TTL duration for crate docs with jitter applied

pub fn search_results_duration(&self) -> Duration

Get TTL duration for search results with jitter applied

pub fn item_docs_duration(&self) -> Duration

Get TTL duration for item docs with jitter applied

Trait Implementations

impl Clone for DocCacheTtl

fn clone(&self) -> DocCacheTtl

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DocCacheTtl

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

Formats the value using the given formatter.

impl Default for DocCacheTtl

fn default() -> Self

Returns the “default value” for a type.

impl Copy for DocCacheTtl