func (r *RRASpec) UnmarshalText(text []byte) error {
r.Xff = 0.5
parts := strings.SplitN(string(text), ":", 4)
if len(parts) < 2 || len(parts) > 4 {
return fmt.Errorf("Invalid RRA specification (not enough or too many elements): %q", string(text))
}
// If first character of first part is a digit, assume we're
// skipping CF and default to WMEAN.
if len(parts[0]) > 0 && strings.Contains("0123456789", string(parts[0][0])) {
parts = append([]string{"WMEAN"}, parts...)
}
switch strings.ToUpper(parts[0]) {
case "WMEAN":
r.Function = rrd.WMEAN
case "MIN":
r.Function = rrd.MIN
case "MAX":
r.Function = rrd.MAX
case "LAST":
r.Function = rrd.LAST
default:
return fmt.Errorf("Invalid consolidation: %q (valid funcs: wmean, min, max, last)", parts[0])
}
var err error
if r.Step, err = misc.BetterParseDuration(parts[1]); err != nil {
return fmt.Errorf("Invalid Step: %q (%v)", parts[1], err)
}
if r.Size, err = misc.BetterParseDuration(parts[2]); err != nil {
return fmt.Errorf("Invalid Size: %q (%v)", parts[2], err)
}
if (r.Size.Nanoseconds() % r.Step.Nanoseconds()) != 0 {
newSize := time.Duration(r.Size.Nanoseconds()/r.Step.Nanoseconds()*r.Step.Nanoseconds()) * time.Nanosecond
log.Printf("Size (%q) is not a multiple of Step (%q), auto adjusting Size to %v.", parts[2], parts[1], newSize)
r.Size = newSize
if newSize.Nanoseconds() == 0 {
return fmt.Errorf("invalid Size (%v)", newSize)
}
}
if len(parts) == 4 {
var err error
if r.Xff, err = strconv.ParseFloat(parts[3], 64); err != nil {
return fmt.Errorf("Invalid XFF: %q (%v)", parts[3], err)
}
}
return nil
}
func parseTime(s string) (*time.Time, error) {
if len(s) == 0 {
return nil, nil
}
if s[0] == '-' { // relative
if dur, err := misc.BetterParseDuration(s[1:len(s)]); err == nil {
t := time.Now().Add(-dur)
return &t, nil
} else {
return nil, fmt.Errorf("parseTime(): Error parsing relative time %q: %v", s, err)
}
} else { // absolute
if s == "now" {
t := time.Now()
return &t, nil
} else if i, err := strconv.ParseInt(s, 10, 64); err == nil {
t := time.Unix(i, 0)
return &t, nil
} else {
return nil, fmt.Errorf("parseTime(): Error parsing absolute time %q: %v", s, err)
}
}
}