Method evict_one

nodedb/src/engine/sparse/doc_cache.rs:68–79

Evict the oldest (FIFO) entry from this shard. Returns `true` if an entry was removed.

(&mut self)

    /// Evict the oldest (FIFO) entry from this shard. Returns `true` if an
    /// entry was removed.
    fn evict_one(&mut self) -> bool {
        while let Some(evicted) = self.order.pop_front() {
            if self.entries.remove(&evicted).is_some() {
                if let Some(count) = self.tenant_counts.get_mut(&evicted.tenant_id) {
                    *count = count.saturating_sub(1);
                }
                return true;
            }
            // Key was already removed (e.g., by `invalidate`); skip stale entry.
        }
        false
    }
}

/// Bounded, database-sharded, weighted-LRU document cache.