Struct KeyFetchCache 

pub struct KeyFetchCache { /* private fields */ }

Cache for tracking failed key fetch attempts

Uses an LRU cache to limit memory usage while providing fast lookups. Entries automatically expire based on the failure type’s TTL.

Implementations

impl KeyFetchCache

pub fn new(max_entries: usize) -> Self

Create a new cache with the specified maximum capacity

pub fn check_failure(&self, issuer: &str, key_id: &str) -> Option<FailureEntry>

Check if there’s a cached (non-expired) failure for this issuer/key_id

Returns Some(FailureEntry) if we should NOT retry yet Returns None if we should try fetching (no cache or expired)

pub fn record_failure(&self, issuer: &str, key_id: &str, error: &Error)

Record a failed fetch attempt

pub fn clear_failure(&self, issuer: &str, key_id: &str)

Clear a failure entry (e.g., after successful fetch)

pub fn len(&self) -> usize

Get the current number of entries in the cache

pub fn is_empty(&self) -> bool

Check if the cache is empty

pub fn clear(&self)

Clear all entries from the cache

Trait Implementations

impl Default for KeyFetchCache

fn default() -> Self

Returns the “default value” for a type.