Struct DefaultPreloader 

pub struct DefaultPreloader { /* private fields */ }

Default CachePreloader with a small set of hardcoded heuristics over the existing top-level cache keys.

Holds a [Weak] reference to the cache to avoid the obvious Arc<ThingsCache> ↔ Arc<dyn CachePreloader> reference cycle. Once the last strong reference to the cache is dropped, CachePreloader::warm becomes a no-op.

Heuristics:

• Accessing inbox:all predicts today:all (priority 8).
• Accessing today:all predicts inbox:all (priority 10).
• Accessing areas:all predicts projects:all (priority 7).

Other keys produce no predictions. Future preloaders (per-project tasks, search-history-driven) plug in via the same trait.

Warm-loop behaviour

The inbox:all ↔ today:all pair is mutually predictive, which would ordinarily create a perpetual warming loop. ThingsCache::notify_preloader guards against this: a predicted key is only enqueued when it is not already present in the cache. Once both keys are warm, no further enqueuing occurs until one of them expires or is invalidated.

Implementations

impl DefaultPreloader

pub fn new(cache: &Arc<ThingsCache>, db: Arc<ThingsDatabase>) -> Arc<Self>

Construct a preloader that holds a [Weak] handle to cache and a strong handle to db. Wrap in Arc before registering with ThingsCache::set_preloader.

Trait Implementations

impl CachePreloader for DefaultPreloader

fn predict(&self, accessed_key: &str) -> Vec<(String, u32)>

Called after a cache access. Returns (key, priority) pairs to enqueue for background warming. Return vec![] to opt out for this access.

fn warm(&self, key: &str)

Called by the warming loop for each top-priority queued key. Implementor fetches and populates the cache, typically via tokio::spawn.