3 // LRUCache is the interface for simple LRU cache.
4 type LRUCache interface {
5 // Adds a value to the cache, returns true if an eviction occurred and
6 // updates the "recently used"-ness of the key.
7 Add(key, value interface{}) bool
9 // Returns key's value from the cache and
10 // updates the "recently used"-ness of the key. #value, isFound
11 Get(key interface{}) (value interface{}, ok bool)
13 // Check if a key exsists in cache without updating the recent-ness.
14 Contains(key interface{}) (ok bool)
16 // Returns key's value without updating the "recently used"-ness of the key.
17 Peek(key interface{}) (value interface{}, ok bool)
19 // Removes a key from the cache.
20 Remove(key interface{}) bool
22 // Removes the oldest entry from cache.
23 RemoveOldest() (interface{}, interface{}, bool)
25 // Returns the oldest entry from the cache. #key, value, isFound
26 GetOldest() (interface{}, interface{}, bool)
28 // Returns a slice of the keys in the cache, from oldest to newest.
31 // Returns the number of items in the cache.
34 // Clear all cache entries