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An attempt to clean up the code that converts Artifactory strings to numbers accepted in Prometheus.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,108 @@ | ||
| package collector | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "regexp" | ||
| "strings" | ||
| ) | ||
|
|
||
| // convArtiBoolToProm is a very interesting appendix. | ||
| // Something needs it, but what and why? | ||
| // It would be quite nice if it was written here why such a thing is needed. | ||
| func convArtiBoolToProm(b bool) float64 { | ||
| if b { | ||
| return 1 | ||
| } | ||
| return 0 | ||
| } | ||
|
|
||
| const ( | ||
| pattOneNumber = `^(?P<number>[[:digit:]]{1,3}(?:,[[:digit:]]{3})*)(?:\.[[:digit:]]{1,2})? ?(?P<multiplier>%|bytes|[KMGT]B)?$` | ||
| ) | ||
|
|
||
| var ( | ||
| reOneNumber = regexp.MustCompile(pattOneNumber) | ||
| ) | ||
|
|
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| func (e *Exporter) convNumArtiToProm(artiNum string) (float64, error) { | ||
| e.logger.Debug( | ||
| "Attempting to convert a string from artifactory representing a number.", | ||
| "artifactory.number", artiNum, | ||
| ) | ||
|
|
||
| if !reOneNumber.MatchString(artiNum) { | ||
| e.logger.Debug( | ||
| "The arti number did not match known templates.", | ||
| "artifactory.number", artiNum, | ||
| ) | ||
| err := fmt.Errorf( | ||
| `The string '%s' does not match pattern '%s'.`, | ||
| artiNum, | ||
| pattOneNumber, | ||
| ) | ||
| return 0, err | ||
| } | ||
|
|
||
| groups := extractNamedGroups(artiNum, reOneNumber) | ||
|
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| // The following `strings.replace` is for those cases that contain a comma | ||
| // thousands separator. In other cases, unnecessary, but cheaper than if. | ||
| // Sorry. | ||
| f, err := e.convNumber( | ||
| strings.Replace(groups["number"], `,`, ``, -1), | ||
| ) | ||
| if err != nil { | ||
| return 0, err | ||
| } | ||
|
|
||
| mAsString, mIsPresent := groups["multiplier"] | ||
| if !mIsPresent { | ||
| return f, nil | ||
| } | ||
| m, err := e.convMultiplier(mAsString) | ||
| if err != nil { | ||
| return 0, err | ||
| } | ||
|
|
||
| return f * m, nil | ||
| } | ||
|
|
||
| const ( | ||
| pattTBytesPercent = `^(?P<tbytes>[[:digit:]]+(?:\.[[:digit:]]{1,2})?) TB \((?P<percent>[[:digit:]]{1,2}(?:\.[[:digit:]]{1,2})?)%\)$` | ||
| ) | ||
|
|
||
| var ( | ||
| reTBytesPercent = regexp.MustCompile(pattTBytesPercent) | ||
| ) | ||
|
|
||
| func (e *Exporter) convTwoNumsArtiToProm(artiSize string) (float64, float64, error) { | ||
| e.logger.Debug( | ||
| "Attempting to convert a string from artifactory representing a number.", | ||
| "artifactory.number", artiSize, | ||
| ) | ||
|
|
||
| if !reTBytesPercent.MatchString(artiSize) { | ||
| e.logger.Debug( | ||
| "The arti number did not match known templates.", | ||
| "artifactory.number", artiSize, | ||
| ) | ||
| err := fmt.Errorf( | ||
| `The string '%s' does not match '%s' pattern.`, | ||
| artiSize, | ||
| pattTBytesPercent, | ||
| ) | ||
| return 0, 0, err | ||
| } | ||
| groups := extractNamedGroups(artiSize, reTBytesPercent) | ||
| b, err := e.convNumber(groups["tbytes"]) | ||
| if err != nil { | ||
| return 0, 0, err | ||
| } | ||
| mulTB, _ := e.convMultiplier(`TB`) | ||
| p, err := e.convNumber(groups["percent"]) | ||
| if err != nil { | ||
| return 0, 0, err | ||
| } | ||
| mulPercent, _ := e.convMultiplier(`%`) | ||
| return b * mulTB, p * mulPercent, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,54 @@ | ||
| package collector | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "math" | ||
| "regexp" | ||
| "strconv" | ||
| ) | ||
|
|
||
| var mulConvDriver = map[string]float64{ | ||
| `%`: 0.01, | ||
| `bytes`: 1, | ||
| `KB`: math.Exp2(10), | ||
| `MB`: math.Exp2(20), | ||
| `GB`: math.Exp2(30), | ||
| `TB`: math.Exp2(40), | ||
| } | ||
|
|
||
| func (e *Exporter) convMultiplier(m string) (float64, error) { | ||
| mul, present := mulConvDriver[m] | ||
| if present { | ||
| return mul, nil | ||
| } | ||
| e.logger.Error( | ||
| "The string was not recognized as a known multiplier.", | ||
| "artifactory.number.multiplier", m, | ||
| ) | ||
| return 0, fmt.Errorf(`Could not recognise '%s; as multiplier`, m) | ||
| } | ||
|
|
||
| func (e *Exporter) convNumber(n string) (float64, error) { | ||
| f, err := strconv.ParseFloat(n, 64) | ||
| if err != nil { | ||
| e.logger.Error( | ||
| "String not convertible to float64", | ||
| "string", n, | ||
| ) | ||
| return 0, err | ||
| } | ||
| return f, nil | ||
| } | ||
|
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| type reCaptureGroups map[string]string | ||
|
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| func extractNamedGroups(artiNum string, re *regexp.Regexp) reCaptureGroups { | ||
| match := re.FindStringSubmatch(artiNum) | ||
| groupsFound := make(reCaptureGroups) | ||
| for i, name := range re.SubexpNames() { | ||
| if i != 0 && name != "" { | ||
| groupsFound[name] = match[i] | ||
| } | ||
| } | ||
| return groupsFound | ||
| } |
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