Struct TtlReachability 

pub struct TtlReachability { /* private fields */ }

The default: proofs live for lag_ms, in a table of at most max_entries rows. A rewind or ref deletion is therefore visible within the configured reachability_lag; only Reachability::invalidate forgets one sooner.

Implementations

impl TtlReachability

pub fn new(lag_ms: u64, max_entries: usize) -> Self

A cache whose rows expire lag_ms after they are recorded.

Trait Implementations

impl Debug for TtlReachability

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

Formats the value using the given formatter.

impl Reachability for TtlReachability

fn known_reachable<'a>( &'a self, repo: &'a RepoId, id: &'a Hash, now_ms: u64, ) -> BoxFuture<'a, Result<bool, ServerError>>

Whether id is already known to be reachable from a published ref of repo as of now_ms. false means unknown, never unreachable. A positive answer skips the walk, so it also skips the walk’s takedown stop predicate: TakedownGate::check must therefore refuse a leaf that only a blocked or tombstoned manifest reaches.

fn record(&self, repo: &RepoId, id: &Hash, now_ms: u64)

Record a proof: a walk found id, or a ref-path serve resolved it.

fn invalidate(&self, repo: &RepoId)

Forget every proof of repo: a takedown, suspension or visibility change (WP-5.9a) that cannot wait out the lag calls it.