Method Set

ch13/cache.go:39–60

Set adds or updates a cache entry with the specified key, value, and TTL

(key, value string, ttl time.Duration)

// Set adds or updates a cache entry with the specified key, value, and TTL
func (c *Cache) Set(key, value string, ttl time.Duration) {
	c.mu.Lock()
	defer c.mu.Unlock()

	// Remove the old value if it exists
	if elem, found := c.items[key]; found {
		c.eviction.Remove(elem)
		delete(c.items, key)
	}

	// Evict the least recently used item if the cache is at capacity
	if c.eviction.Len() >= c.capacity {
		c.evictLRU()
	}

	item := CacheItem{
		Value:      value,
		ExpiryTime: time.Now().Add(ttl),
	}
	elem := c.eviction.PushFront(&entry{key, item})
	c.items[key] = elem
}

// Get retrieves a cache entry by its key. It returns the value and a boolean indicating whether the key was found
func (c *Cache) Get(key string) (string, bool) {