aa_cache/
cached_value.rs

1//! [`CachedValue`] — a cache entry tagged with its insertion instant.
2
3use std::time::{Duration, Instant};
4
5/// A value stored in the L1 cache together with the [`Instant`] it was inserted.
6///
7/// The insertion time drives TTL expiry: an entry older than the cache's
8/// configured TTL is treated as a miss, forcing a reload from the wrapped store.
9#[derive(Debug, Clone)]
10pub struct CachedValue<V> {
11    /// The cached value.
12    pub value: V,
13    /// When this entry was inserted.
14    pub inserted_at: Instant,
15}
16
17impl<V> CachedValue<V> {
18    /// Wrap `value`, stamping it with the current instant.
19    #[must_use]
20    pub fn new(value: V) -> Self {
21        Self {
22            value,
23            inserted_at: Instant::now(),
24        }
25    }
26
27    /// Return `true` once the entry's age has reached or exceeded `ttl`.
28    #[must_use]
29    pub fn is_expired(&self, ttl: Duration) -> bool {
30        self.inserted_at.elapsed() >= ttl
31    }
32}
aa_cache/cached_value.rs

aa_cache/
cached_value.rs
