Struct RwhodStatusRegistry 

pub struct RwhodStatusRegistry {
    max_entries: usize,
    by_hostname: HashMap<String, WhodStatusUpdate>,
    by_recvtime: BTreeSet<(DateTime<Utc>, String)>,
}

A bounded collection of rwhod status updates, keyed by hostname.

This exists to put a hard cap on memory usage regardless of how many distinct hostnames a (potentially malicious) sender on the LAN tries to report. When the registry is at capacity and an update for a previously-unseen hostname comes in, the entry with the oldest recvtime is evicted to make room for it. Hosts that keep broadcasting periodically naturally stay “recent” and are never evicted by this.

Fields

max_entries: usize

by_hostname: HashMap<String, WhodStatusUpdate>

by_recvtime: BTreeSet<(DateTime<Utc>, String)>

Implementations

impl RwhodStatusRegistry

pub fn new(max_entries: usize) -> Self

pub fn upsert(&mut self, status_update: WhodStatusUpdate)

Insert or refresh a status update, keyed by its hostname.

If the registry is at capacity and status_update is for a previously-unseen hostname, the entry with the oldest recvtime will be evicted to make room for it.

pub fn len(&self) -> usize

pub fn is_empty(&self) -> bool

pub fn values(&self) -> impl Iterator<Item = &WhodStatusUpdate>

Trait Implementations

impl Debug for RwhodStatusRegistry

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

Formats the value using the given formatter.