memutil

Documentation

Index

• Variables
• type LRU
  • func NewLRUCache(capacity int) *LRU
  • func (lru *LRU) Get(key string) (interface{}, error)
  • func (lru *LRU) Set(key string, value interface{})
• type TTL
  • func NewTTLCache(aliveSeconds int64, capacity int) *TTL
  • func (ttl *TTL) Get(key string) (interface{}, error)
  • func (ttl *TTL) Set(key string, value interface{})

Variables

var (
	KeyError = errors.New("key not exist")
)

Types

type LRU

type LRU struct {
	sync.Mutex
	// contains filtered or unexported fields
}

func NewLRUCache

func NewLRUCache(capacity int) *LRU

maxSize: 缓存的最大数量

func (*LRU) Get

func (lru *LRU) Get(key string) (interface{}, error)

func (*LRU) Set

func (lru *LRU) Set(key string, value interface{})

type TTL

type TTL struct {
	sync.Mutex
	// contains filtered or unexported fields
}

func NewTTLCache

func NewTTLCache(aliveSeconds int64, capacity int) *TTL

aliveSeconds: 缓存有效期，capacity: 缓存容量，注意合理估计capacity为未过期元素的最大数量

func (*TTL) Get

func (ttl *TTL) Get(key string) (interface{}, error)

func (*TTL) Set

func (ttl *TTL) Set(key string, value interface{})

当缓存容量超出指定值时，会主动扫描一遍过期键 但是这并不能保证缓存容量减少到指定范围之内