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47 lines
1.3 KiB
Go
47 lines
1.3 KiB
Go
// Copyright (c) HashiCorp, Inc.
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// SPDX-License-Identifier: MPL-2.0
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// Package simplelru provides simple LRU implementation based on build-in container/list.
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package simplelru
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// LRUCache is the interface for simple LRU cache.
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type LRUCache[K comparable, V any] interface {
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// Adds a value to the cache, returns true if an eviction occurred and
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// updates the "recently used"-ness of the key.
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Add(key K, value V) bool
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// Returns key's value from the cache and
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// updates the "recently used"-ness of the key. #value, isFound
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Get(key K) (value V, ok bool)
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// Checks if a key exists in cache without updating the recent-ness.
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Contains(key K) (ok bool)
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// Returns key's value without updating the "recently used"-ness of the key.
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Peek(key K) (value V, ok bool)
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// Removes a key from the cache.
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Remove(key K) bool
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// Removes the oldest entry from cache.
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RemoveOldest() (K, V, bool)
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// Returns the oldest entry from the cache. #key, value, isFound
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GetOldest() (K, V, bool)
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// Returns a slice of the keys in the cache, from oldest to newest.
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Keys() []K
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// Values returns a slice of the values in the cache, from oldest to newest.
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Values() []V
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// Returns the number of items in the cache.
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Len() int
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// Clears all cache entries.
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Purge()
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// Resizes cache, returning number evicted
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Resize(int) int
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}
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