statsd_exporter/pkg/mapper/observer.go

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// Copyright 2013 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package mapper
import "fmt"
type ObserverType string
const (
ObserverTypeHistogram ObserverType = "histogram"
ObserverTypeSummary ObserverType = "summary"
ObserverTypeDefault ObserverType = ""
)
func (t *ObserverType) UnmarshalYAML(unmarshal func(interface{}) error) error {
var v string
if err := unmarshal(&v); err != nil {
return err
}
switch ObserverType(v) {
case ObserverTypeHistogram:
*t = ObserverTypeHistogram
case ObserverTypeSummary, ObserverTypeDefault:
*t = ObserverTypeSummary
default:
return fmt.Errorf("invalid observer type '%s'", v)
}
return nil
}