package cache import ( "encoding/json" "time" "github.com/bradfitz/gomemcache/memcache" ) //Memcache struct contains *memcache.Client type Memcache struct { conn *memcache.Client } //NewMemcache create new memcache func NewMemcache(server ...string) *Memcache { mc := memcache.New(server...) return &Memcache{mc} } //Get return cached value func (mem *Memcache) Get(key string) interface{} { var err error var item *memcache.Item if item, err = mem.conn.Get(key); err != nil { return nil } var result interface{} if err = json.Unmarshal(item.Value, &result); err != nil { return nil } return result } // IsExist check value exists in memcache. func (mem *Memcache) IsExist(key string) bool { if _, err := mem.conn.Get(key); err != nil { return false } return true } //Set cached value with key and expire time. func (mem *Memcache) Set(key string, val interface{}, timeout time.Duration) (err error) { var data []byte if data, err = json.Marshal(val); err != nil { return err } item := &memcache.Item{Key: key, Value: data, Expiration: int32(timeout / time.Second)} return mem.conn.Set(item) } //Delete delete value in memcache. func (mem *Memcache) Delete(key string) error { return mem.conn.Delete(key) }