// SetExpire sets data with TTL.
func (c *CacheTTL) SetExpire(key string, data interface{}, ttl int64) error {
if key == "" {
return nil
}
c.itemsMu.Lock()
defer c.itemsMu.Unlock()
if data == nil {
delete(c.items, key)
return nil
}
// return oldest item when the cache reaches maximum size
if len(c.deleteQueue) >= c.maxSize {
c.deleteOldest()
}
item := eurekache.NewItem()
item.SetExpire(ttl)
item.Value = data
c.items[key] = item
c.deleteQueue = append(c.deleteQueue, key)
return nil
}
// SetExpire sets data into redis with TTL. data is wrapped by gob-encoded Item
func (c *RedisCache) SetExpire(key string, data interface{}, ttl int64) error {
conn, err := c.conn()
if err != nil {
return err
}
defer conn.Close()
if data == nil {
_, err = conn.Do("DEL", c.prefix+key)
return err
}
item := eurekache.NewItem()
item.SetExpire(ttl)
item.Value = data
var buf bytes.Buffer
enc := gob.NewEncoder(&buf)
err = enc.Encode(item)
if err != nil {
return err
}
switch {
case ttl < 1:
_, err = conn.Do("SET", c.prefix+key, buf.Bytes())
default:
ttl = ttl / 1000 // convert milli-sec to sec
_, err = conn.Do("SETEX", c.prefix+key, ttl, buf.Bytes())
}
if err != nil {
return err
}
return nil
}