forked from zalando/skipper
/
metricsFlags.go
42 lines (34 loc) · 858 Bytes
/
metricsFlags.go
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package main
import (
"errors"
"strings"
)
const metricsFlavourUsage = "Metrics flavour is used to change the exposed metrics format. Supported metric formats: 'codahale' and 'prometheus', you can select both of them"
type metricsFlags struct {
values []string
}
var (
errInvalidMetricsFlag = errors.New("invalid metrics flavour, valid ones are 'codahale' and 'prometheus'")
allowed = map[string]bool{
"codahale": true,
"prometheus": true,
}
)
func (m *metricsFlags) String() string {
return strings.Join(m.values, ",")
}
func (m *metricsFlags) Set(value string) error {
if m == nil {
m = &metricsFlags{}
}
m.values = strings.Split(value, ",")
for _, s := range m.values {
if _, ok := allowed[s]; !ok {
return errInvalidMetricsFlag
}
}
return nil
}
func (m *metricsFlags) Get() []string {
return m.values
}