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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,50 @@ | ||
| package cache | ||
|
|
||
| import ( | ||
| "sync" | ||
| "time" | ||
|
|
||
| "github.com/daocloud/crproxy/internal/heap" | ||
| ) | ||
|
|
||
| type Cache[K comparable, T any] struct { | ||
| mu sync.RWMutex | ||
| data map[K]T | ||
| heap *heap.Heap[int64, K] | ||
| } | ||
|
|
||
| func NewCache[K comparable, T any]() *Cache[K, T] { | ||
| return &Cache[K, T]{ | ||
| data: map[K]T{}, | ||
| heap: heap.NewHeap[int64, K](), | ||
| } | ||
| } | ||
|
|
||
| func (c *Cache[K, T]) Set(key K, value T, ttl time.Duration) { | ||
| expiry := time.Now().Add(ttl).Unix() | ||
| c.mu.Lock() | ||
| defer c.mu.Unlock() | ||
| c.data[key] = value | ||
| c.heap.Push(expiry, key) | ||
| } | ||
|
|
||
| func (c *Cache[K, T]) Get(key K) (T, bool) { | ||
| c.mu.RLock() | ||
| defer c.mu.RUnlock() | ||
| item, ok := c.data[key] | ||
| return item, ok | ||
| } | ||
|
|
||
| func (c *Cache[K, T]) Evict() { | ||
| c.mu.Lock() | ||
| defer c.mu.Unlock() | ||
| currentTime := time.Now().Unix() | ||
| for c.heap.Len() > 0 { | ||
| expiry, key, ok := c.heap.Peek() | ||
| if !ok || expiry > currentTime { | ||
| break | ||
| } | ||
| c.heap.Pop() | ||
| delete(c.data, key) | ||
| } | ||
| } |
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