Method Add

controller/cache/cache.go:86–98

(k string, x interface{}, d time.Duration)

}

func (c *cache) Add(k string, x interface{}, d time.Duration) error {
	c.mu.Lock()
	//check exit
	_, found := c.get(k)
	if found {
		err := fmt.Errorf("Item:%s has already exit", k)
		return err
	}
	//set
	c.set(k, x, d)
	c.mu.Unlock()
	return nil
}

func (c *cache) Replace(k string, x interface{}, d time.Duration) error {
	c.mu.Lock()