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metrics.go
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metrics.go
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//
// Copyright (C) 2019-2020 Vdaas.org Vald team ( kpango, rinx, kmrmt )
//
// 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
//
// https://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 metrics provides metrics.
package metrics
import (
"context"
"reflect"
"github.com/vdaas/vald/internal/errors"
"go.opencensus.io/stats"
"go.opencensus.io/stats/view"
"go.opencensus.io/tag"
)
var (
Int64 = stats.Int64
Float64 = stats.Float64
UnitDimensionless = stats.UnitDimensionless
UnitBytes = stats.UnitBytes
UnitMilliseconds = stats.UnitMilliseconds
Count = view.Count
Distribution = view.Distribution
LastValue = view.LastValue
Sum = view.Sum
DefaultMillisecondsDistribution = Distribution(
0.01,
0.05,
0.1,
0.3,
0.6,
0.8,
1,
2,
3,
4,
5,
6,
8,
10,
13,
16,
20,
25,
30,
40,
50,
65,
80,
100,
130,
160,
200,
250,
300,
400,
500,
650,
800,
1000,
2000,
5000,
10000,
20000,
50000,
100000,
)
RoughMillisecondsDistribution = Distribution(
1,
5,
10,
30,
60,
8,
100,
200,
300,
400,
500,
600,
800,
1000,
1300,
1600,
2000,
2500,
3000,
4000,
5000,
6500,
8000,
10000,
13000,
16000,
20000,
25000,
30000,
40000,
50000,
65000,
80000,
100000,
200000,
500000,
1000000,
2000000,
5000000,
10000000,
)
NewKey = tag.NewKey
ValdOrg = "vald.vdaas.org"
)
type Measurement = stats.Measurement
type View = view.View
type Int64Measure = stats.Int64Measure
type Float64Measure = stats.Float64Measure
type Key = tag.Key
type MeasurementWithTags struct {
Measurement Measurement
Tags map[Key]string
}
type Metric interface {
Measurement(ctx context.Context) ([]Measurement, error)
MeasurementWithTags(ctx context.Context) ([]MeasurementWithTags, error)
View() []*View
}
func RegisterView(views ...*View) error {
return view.Register(views...)
}
func Record(ctx context.Context, ms ...Measurement) {
stats.Record(ctx, ms...)
}
func RecordWithTags(ctx context.Context, mwts ...MeasurementWithTags) (errs error) {
for _, mwt := range mwts {
mutators := make([]tag.Mutator, 0, len(mwt.Tags))
for k, v := range mwt.Tags {
mutators = append(mutators, tag.Upsert(k, v))
}
err := stats.RecordWithTags(ctx, mutators, mwt.Measurement)
if err != nil {
errs = errors.Wrap(errs, err.Error())
}
}
return errs
}
func MeasurementsCount(m Metric) int {
cnt := 0
rv := reflect.Indirect(reflect.ValueOf(m))
for i := 0; i < rv.NumField(); i++ {
switch rv.Field(i).Type() {
case reflect.TypeOf(Int64Measure{}),
reflect.TypeOf(&Int64Measure{}),
reflect.TypeOf(Float64Measure{}),
reflect.TypeOf(&Float64Measure{}):
cnt++
}
}
return cnt
}