src/accessor/cache.rs

   1 //! Cache helper for random access pxar accesses.
   2
   3 use std::sync::Arc;
   4
   5 /// A simple asynchronous caching trait to help speed up random access for pxar archives.
   6 pub trait Cache<K, V: ?Sized> {
   7     /// Fetch a value from this cache store.
   8     fn fetch(&self, key: K) -> Option<Arc<V>>;
   9
  10     /// Update the cache with a value.
  11     ///
  12     /// It is up to the implementation to choose whether or not to store the value. Note that since
  13     /// all values are `Arc`s, the values will remain alive as long as they're in use even if
  14     /// they're not cached.
  15     fn insert(&self, key: K, value: Arc<V>);
  16 }