Struct DnsCache 

pub struct DnsCache { /* private fields */ }

Cache for DNS records with automatic expiration.

The cache stores records along with their fetch timestamp and expires after a configurable TTL to ensure data freshness.

Implementations

impl DnsCache

pub fn new(ttl: Duration) -> Self

Create a new DNS record cache.

Arguments

• ttl - How long to keep records cached before requiring a refresh

pub fn with_default_ttl() -> Self

Create a cache with default 60-second TTL.

pub fn is_valid(&self) -> bool

Check if the cache has valid (non-expired) records.

pub fn get(&self) -> Option<&Vec<DnsRecord>>

Get cached records if valid, otherwise returns None.

pub fn set(&mut self, records: Vec<DnsRecord>)

Update the cache with fresh records.

pub fn invalidate(&mut self)

Force invalidate the cache.

pub fn age(&self) -> Option<Duration>

Get the age of the cached records.

pub fn remaining_ttl(&self) -> Option<Duration>

Get remaining TTL before cache expires.