statsd_exporter/pkg/mapper/mapper_defaults.go

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// Copyright 2020 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 "time"
type MapperConfigDefaults struct {
ObserverType ObserverType `yaml:"observer_type"`
MatchType MatchType `yaml:"match_type"`
GlobDisableOrdering bool `yaml:"glob_disable_ordering"`
Ttl time.Duration `yaml:"ttl"`
SummaryOptions SummaryOptions `yaml:"summary_options"`
HistogramOptions HistogramOptions `yaml:"histogram_options"`
}
// mapperConfigDefaultsAlias is used to unmarshal the yaml config into mapperConfigDefaults and allows deprecated fields
type mapperConfigDefaultsAlias struct {
ObserverType ObserverType `yaml:"observer_type"`
TimerType ObserverType `yaml:"timer_type,omitempty"` // DEPRECATED - field only present to preserve backwards compatibility in configs
Buckets []float64 `yaml:"buckets"` // DEPRECATED - field only present to preserve backwards compatibility in configs
Quantiles []MetricObjective `yaml:"quantiles"` // DEPRECATED - field only present to preserve backwards compatibility in configs
MatchType MatchType `yaml:"match_type"`
GlobDisableOrdering bool `yaml:"glob_disable_ordering"`
Ttl time.Duration `yaml:"ttl"`
SummaryOptions SummaryOptions `yaml:"summary_options"`
HistogramOptions HistogramOptions `yaml:"histogram_options"`
}
// UnmarshalYAML is a custom unmarshal function to allow use of deprecated config keys
// observer_type will override timer_type
func (d *MapperConfigDefaults) UnmarshalYAML(unmarshal func(interface{}) error) error {
var tmp mapperConfigDefaultsAlias
if err := unmarshal(&tmp); err != nil {
return err
}
// Copy defaults
d.ObserverType = tmp.ObserverType
d.MatchType = tmp.MatchType
d.GlobDisableOrdering = tmp.GlobDisableOrdering
d.Ttl = tmp.Ttl
d.SummaryOptions = tmp.SummaryOptions
d.HistogramOptions = tmp.HistogramOptions
// Use deprecated TimerType if necessary
if tmp.ObserverType == "" {
d.ObserverType = tmp.TimerType
}
// Use deprecated quantiles if necessary
if len(tmp.SummaryOptions.Quantiles) == 0 && len(tmp.Quantiles) > 0 {
d.SummaryOptions = SummaryOptions{Quantiles: tmp.Quantiles}
}
// Use deprecated buckets if necessary
if len(tmp.HistogramOptions.Buckets) == 0 && len(tmp.Buckets) > 0 {
d.HistogramOptions = HistogramOptions{Buckets: tmp.Buckets}
}
return nil
}