// Save a new item into the cache.
func (r *Redis) Set(item kit.CacheItem) Error {
key := item.GetKey()
if key == "" {
return kit.AppError{Code: "empty_key"}
}
key = r.key(key)
if item.IsExpired() {
return kit.AppError{Code: "item_expired"}
}
expireSeconds := 0
if expires := item.GetExpiresAt(); !expires.IsZero() {
seconds := expires.Sub(time.Now()).Seconds()
if seconds > 0 && seconds < 1 {
return kit.AppError{Code: "item_expired"}
}
expireSeconds = int(seconds)
}
conn := r.pool.Get()
defer conn.Close()
value, err := item.ToString()
if err != nil {
return kit.AppError{
Code: "cacheitem_tostring_error",
Message: err.Error(),
Errors: []error{err},
}
}
if value == "" {
return kit.AppError{Code: "empty_value"}
}
conn.Send("SET", key, value)
if expireSeconds > 0 {
conn.Send("EXPIRE", key, expireSeconds)
}
if tags := item.GetTags(); tags != nil {
tagKey := r.tagKey(key)
conn.Send("SET", tagKey, strings.Join(tags, ";"))
if expireSeconds > 0 {
conn.Send("EXPIRE", tagKey, expireSeconds)
}
}
if err := conn.Flush(); err != nil {
return redisErr(err)
}
return nil
}
