diff options
Diffstat (limited to 'vendor/github.com/prometheus/client_golang/prometheus/desc.go')
| -rw-r--r-- | vendor/github.com/prometheus/client_golang/prometheus/desc.go | 25 |
1 files changed, 7 insertions, 18 deletions
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/desc.go b/vendor/github.com/prometheus/client_golang/prometheus/desc.go index 1835b16..920abc9 100644 --- a/vendor/github.com/prometheus/client_golang/prometheus/desc.go +++ b/vendor/github.com/prometheus/client_golang/prometheus/desc.go @@ -25,19 +25,6 @@ import ( dto "github.com/prometheus/client_model/go" ) -// reservedLabelPrefix is a prefix which is not legal in user-supplied -// label names. -const reservedLabelPrefix = "__" - -// Labels represents a collection of label name -> value mappings. This type is -// commonly used with the With(Labels) and GetMetricWith(Labels) methods of -// metric vector Collectors, e.g.: -// myVec.With(Labels{"code": "404", "method": "GET"}).Add(42) -// -// The other use-case is the specification of constant label pairs in Opts or to -// create a Desc. -type Labels map[string]string - // Desc is the descriptor used by every Prometheus Metric. It is essentially // the immutable meta-data of a Metric. The normal Metric implementations // included in this package manage their Desc under the hood. Users only have to @@ -122,6 +109,12 @@ func NewDesc(fqName, help string, variableLabels []string, constLabels Labels) * for _, labelName := range labelNames { labelValues = append(labelValues, constLabels[labelName]) } + // Validate the const label values. They can't have a wrong cardinality, so + // use in len(labelValues) as expectedNumberOfValues. + if err := validateLabelValues(labelValues, len(labelValues)); err != nil { + d.err = err + return d + } // Now add the variable label names, but prefix them with something that // cannot be in a regular label name. That prevents matching the label // dimension with a different mix between preset and variable labels. @@ -137,6 +130,7 @@ func NewDesc(fqName, help string, variableLabels []string, constLabels Labels) * d.err = errors.New("duplicate label names") return d } + vh := hashNew() for _, val := range labelValues { vh = hashAdd(vh, val) @@ -193,8 +187,3 @@ func (d *Desc) String() string { d.variableLabels, ) } - -func checkLabelName(l string) bool { - return model.LabelName(l).IsValid() && - !strings.HasPrefix(l, reservedLabelPrefix) -} |