// Implementation of Check And Set method
func (enum *Ascii_protocol_enum) cas(storage *cache.LRUCache) (string, error) {
existed_item := storage.Get(enum.key[0])
if existed_item != nil {
if existed_item.Cas_unique == enum.cas_unique && existed_item.Cas_unique != 0 {
return enum.set(storage)
}
}
return NOT_FOUND, nil
}
// Implements touch method
func (enum *Ascii_protocol_enum) touch(storage *cache.LRUCache) (string, error) {
if item := storage.Get(enum.key[0]); item == nil {
return NOT_FOUND, nil
} else {
if !storage.Set(item.Cacheable, item.Flags, enum.exptime, item.Cas_unique) {
return strings.Replace(SERVER_ERROR_TEMP, "%s", "Not enough memory", 1), errors.New("SERVER_ERROR")
}
return "TOUCHED\r\n", nil
}
}
// Implements append method
func (enum *Ascii_protocol_enum) append(storage *cache.LRUCache) (string, error) {
existed_item := storage.Get(enum.key[0])
if existed_item == nil {
return NOT_STORED, nil
}
existed_data := tools.ExtractStoredData(existed_item.Cacheable)
if existed_data == nil {
return NOT_STORED, nil
}
return enum.pending(storage, existed_item, append(existed_data, enum.data_string...)) // ...
}
// Implements get method
// Passed boolean param cas - defines of returning cas_unique
func (enum *Ascii_protocol_enum) get(storage *cache.LRUCache, cas bool) (string, error) {
var result = ""
for _, value := range enum.key {
item := storage.Get(value)
if item != nil {
data := tools.ExtractStoredData(item.Cacheable)
if data == nil {
continue
}
result += "VALUE " + value + " " + tools.IntToString(int64(item.Flags)) + " " + tools.IntToString(int64(len(data)))
if cas {
cas_id := tools.GenerateCasId()
storage.SetCas(value, cas_id)
result += " " + tools.IntToString(cas_id)
}
result += "\r\n"
result += string(data) + "\r\n"
}
}
return result + "END\r\n", nil
}
// Utility method, for joining common parts of incr/decr methods.
// Receives additional param sign, which defines operation: -1 or 1
func (enum *Ascii_protocol_enum) fold(storage *cache.LRUCache, sign int) (string, error) {
if item := storage.Get(enum.key[0]); item != nil && (sign == 1 || sign == -1) {
existed_data := tools.ExtractStoredData(item.Cacheable)
if existed_data != nil {
evaluated_data_for_existed, err_for_existed := tools.StringToInt64(string(existed_data))
evaluated_data_for_passed, err_for_passed := tools.StringToUInt64(string(enum.data_string))
if err_for_existed == nil && err_for_passed == nil {
var result string
if sign > 0 {
result = tools.IntToString(evaluated_data_for_existed + int64(evaluated_data_for_passed))
} else {
result = tools.IntToString(evaluated_data_for_existed - int64(evaluated_data_for_passed))
}
if storage.Set(tools.NewStoredData([]byte(result), enum.key[0]), item.Flags, item.Exptime, 0) {
return result + "\r\n", nil
}
return strings.Replace(SERVER_ERROR_TEMP, "%s", "Not enough memory", 1), errors.New("SERVER_ERROR")
}
return ERROR_TEMP, nil
}
}
return NOT_FOUND, nil
}
// Implements add method
func (enum *Ascii_protocol_enum) add(storage *cache.LRUCache) (string, error) {
if storage.Get(enum.key[0]) != nil {
return NOT_STORED, nil
}
return enum.set(storage)
}