prometheus/model/dto.go
2012-12-19 20:34:54 +01:00

161 lines
3.7 KiB
Go

// Copyright 2012 Prometheus Team
// 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 model
import (
"code.google.com/p/goprotobuf/proto"
"crypto/md5"
"encoding/hex"
"errors"
dto "github.com/matttproud/prometheus/model/generated"
"io"
"sort"
"time"
)
func SampleToMetricDTO(s *Sample) *dto.Metric {
labelLength := len(s.Metric)
labelNames := make([]string, 0, labelLength)
for labelName := range s.Metric {
labelNames = append(labelNames, string(labelName))
}
sort.Strings(labelNames)
labelSets := make([]*dto.LabelPair, 0, labelLength)
for _, labelName := range labelNames {
labelValue := s.Metric[LabelName(labelName)]
labelPair := &dto.LabelPair{
Name: proto.String(string(labelName)),
Value: proto.String(string(labelValue)),
}
labelSets = append(labelSets, labelPair)
}
return &dto.Metric{
LabelPair: labelSets,
}
}
func MetricToDTO(m *Metric) *dto.Metric {
metricLength := len(*m)
labelNames := make([]string, 0, metricLength)
for labelName := range *m {
labelNames = append(labelNames, string(labelName))
}
sort.Strings(labelNames)
labelSets := make([]*dto.LabelPair, 0, metricLength)
for _, labelName := range labelNames {
l := LabelName(labelName)
labelValue := (*m)[l]
labelPair := &dto.LabelPair{
Name: proto.String(string(labelName)),
Value: proto.String(string(labelValue)),
}
labelSets = append(labelSets, labelPair)
}
return &dto.Metric{
LabelPair: labelSets,
}
}
func StringToFingerprint(v string) Fingerprint {
hash := md5.New()
io.WriteString(hash, v)
return Fingerprint(hex.EncodeToString(hash.Sum([]byte{})))
}
func BytesToFingerprint(v []byte) Fingerprint {
hash := md5.New()
hash.Write(v)
return Fingerprint(hex.EncodeToString(hash.Sum([]byte{})))
}
func LabelSetToDTOs(s *LabelSet) []*dto.LabelPair {
metricLength := len(*s)
labelNames := make([]string, 0, metricLength)
for labelName := range *s {
labelNames = append(labelNames, string(labelName))
}
sort.Strings(labelNames)
labelSets := make([]*dto.LabelPair, 0, metricLength)
for _, labelName := range labelNames {
l := LabelName(labelName)
labelValue := (*s)[l]
labelPair := &dto.LabelPair{
Name: proto.String(string(labelName)),
Value: proto.String(string(labelValue)),
}
labelSets = append(labelSets, labelPair)
}
return labelSets
}
func LabelSetToDTO(s *LabelSet) *dto.LabelSet {
return &dto.LabelSet{
Member: LabelSetToDTOs(s),
}
}
func LabelNameToDTO(l *LabelName) *dto.LabelName {
return &dto.LabelName{
Name: proto.String(string(*l)),
}
}
func FingerprintToDTO(f *Fingerprint) *dto.Fingerprint {
return &dto.Fingerprint{
Signature: proto.String(string(*f)),
}
}
func MessageToFingerprintDTO(message proto.Message) (*dto.Fingerprint, error) {
if messageByteArray, marshalError := proto.Marshal(message); marshalError == nil {
fingerprint := BytesToFingerprint(messageByteArray)
return &dto.Fingerprint{
Signature: proto.String(string(fingerprint)),
}, nil
} else {
return nil, marshalError
}
return nil, errors.New("Unknown error in generating FingerprintDTO from message.")
}
func SampleFromDTO(m *Metric, t *time.Time, v *dto.SampleValue) *Sample {
s := &Sample{
Value: SampleValue(*v.Value),
Timestamp: *t,
}
s.Metric = *m
return s
}