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wakapi/models/metrics/metric.go

44 lines
816 B
Go

package metrics
import (
"fmt"
"strings"
)
// Hand-crafted Prometheus metrics
// Since we're only using very simple counters in this application,
// we don't actually need the official client SDK as a dependency
type Metrics []Metric
func (m Metrics) Print() (output string) {
printedMetrics := make(map[string]bool)
for _, m := range m {
if _, ok := printedMetrics[m.Key()]; !ok {
output += fmt.Sprintf("%s\n", m.Header())
printedMetrics[m.Key()] = true
}
output += fmt.Sprintf("%s\n", m.Print())
}
return output
}
func (m Metrics) Len() int {
return len(m)
}
func (m Metrics) Less(i, j int) bool {
return strings.Compare(m[i].Key(), m[j].Key()) < 0
}
func (m Metrics) Swap(i, j int) {
m[i], m[j] = m[j], m[i]
}
type Metric interface {
Key() string
Header() string
Print() string
}