forked from moira-alert/moira
/
timeseries.go
175 lines (152 loc) · 5.17 KB
/
timeseries.go
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package checker
import (
"bytes"
"fmt"
"math"
"strconv"
"github.com/moira-alert/moira/expression"
"github.com/moira-alert/moira/remote"
"github.com/moira-alert/moira/target"
)
// TriggerTimeSeries represent collection of Main target timeseries
// and collection of additions targets timeseries
type TriggerTimeSeries struct {
Main []*target.TimeSeries
Additional []*target.TimeSeries
}
// ErrWrongTriggerTargets represents targets with inconsistent number of timeseries
type ErrWrongTriggerTargets []int
// ErrWrongTriggerTarget implementation for list of invalid targets found
func (err ErrWrongTriggerTargets) Error() string {
var countType []byte
if len(err) > 1 {
countType = []byte("Targets ")
} else {
countType = []byte("Target ")
}
wrongTargets := bytes.NewBuffer(countType)
for tarInd, tar := range err {
wrongTargets.WriteString("t")
wrongTargets.WriteString(strconv.Itoa(tar))
if tarInd != len(err)-1 {
wrongTargets.WriteString(", ")
}
}
wrongTargets.WriteString(" has more than one timeseries")
return wrongTargets.String()
}
func (triggerChecker *TriggerChecker) getTimeSeries(from, until int64) (*TriggerTimeSeries, []string, error) {
wrongTriggerTargets := make([]int, 0)
triggerTimeSeries := &TriggerTimeSeries{
Main: make([]*target.TimeSeries, 0),
Additional: make([]*target.TimeSeries, 0),
}
metricsArr := make([]string, 0)
isSimpleTrigger := triggerChecker.trigger.IsSimple()
for targetIndex, tar := range triggerChecker.trigger.Targets {
result, err := target.EvaluateTarget(triggerChecker.Database, tar, from, until, isSimpleTrigger)
if err != nil {
return nil, nil, err
}
if targetIndex == 0 {
triggerTimeSeries.Main = result.TimeSeries
} else {
timeSeriesCount := len(result.TimeSeries)
switch {
case timeSeriesCount == 0:
if len(result.Metrics) == 0 {
triggerTimeSeries.Additional = append(triggerTimeSeries.Additional, nil)
} else {
return nil, nil, fmt.Errorf("target t%v has no timeseries", targetIndex+1)
}
case timeSeriesCount > 1:
wrongTriggerTargets = append(wrongTriggerTargets, targetIndex+1)
default:
triggerTimeSeries.Additional = append(triggerTimeSeries.Additional, result.TimeSeries[0])
}
}
metricsArr = append(metricsArr, result.Metrics...)
}
if len(wrongTriggerTargets) > 0 {
return nil, nil, ErrWrongTriggerTargets(wrongTriggerTargets)
}
return triggerTimeSeries, metricsArr, nil
}
func (triggerChecker *TriggerChecker) getRemoteTimeSeries(from, until int64) (*TriggerTimeSeries, error) {
wrongTriggerTargets := make([]int, 0)
triggerTimeSeries := &TriggerTimeSeries{
Main: make([]*target.TimeSeries, 0),
Additional: make([]*target.TimeSeries, 0),
}
isSimpleTrigger := triggerChecker.trigger.IsSimple()
for targetIndex, tar := range triggerChecker.trigger.Targets {
timeSeries, err := remote.Fetch(triggerChecker.RemoteConfig, tar, from, until, isSimpleTrigger)
if err != nil {
return nil, err
}
if targetIndex == 0 {
triggerTimeSeries.Main = timeSeries
} else {
timeSeriesCount := len(timeSeries)
switch {
case timeSeriesCount == 0:
return nil, fmt.Errorf("target t%v has no timeseries", targetIndex+1)
case timeSeriesCount > 1:
wrongTriggerTargets = append(wrongTriggerTargets, targetIndex+1)
default: // == 1
triggerTimeSeries.Additional = append(triggerTimeSeries.Additional, timeSeries[0])
}
}
}
if len(wrongTriggerTargets) > 0 {
return nil, ErrWrongTriggerTargets(wrongTriggerTargets)
}
return triggerTimeSeries, nil
}
func (*TriggerTimeSeries) getMainTargetName() string {
return "t1"
}
func (*TriggerTimeSeries) getAdditionalTargetName(targetIndex int) string {
return fmt.Sprintf("t%v", targetIndex+2)
}
func (triggerTimeSeries *TriggerTimeSeries) getExpressionValues(firstTargetTimeSeries *target.TimeSeries, valueTimestamp int64) (*expression.TriggerExpression, bool) {
expressionValues := &expression.TriggerExpression{
AdditionalTargetsValues: make(map[string]float64, len(triggerTimeSeries.Additional)),
}
firstTargetValue := firstTargetTimeSeries.GetTimestampValue(valueTimestamp)
if IsInvalidValue(firstTargetValue) {
return expressionValues, false
}
expressionValues.MainTargetValue = firstTargetValue
for targetNumber := 0; targetNumber < len(triggerTimeSeries.Additional); targetNumber++ {
additionalTimeSeries := triggerTimeSeries.Additional[targetNumber]
if additionalTimeSeries == nil {
return expressionValues, false
}
tnValue := additionalTimeSeries.GetTimestampValue(valueTimestamp)
if IsInvalidValue(tnValue) {
return expressionValues, false
}
expressionValues.AdditionalTargetsValues[triggerTimeSeries.getAdditionalTargetName(targetNumber)] = tnValue
}
return expressionValues, true
}
// IsInvalidValue checks trigger for Inf and NaN. If it is then trigger is not valid
func IsInvalidValue(val float64) bool {
if math.IsNaN(val) {
return true
}
if math.IsInf(val, 0) {
return true
}
return false
}
// hasOnlyWildcards checks given targetTimeSeries for only wildcards
func (triggerTimeSeries *TriggerTimeSeries) hasOnlyWildcards() bool {
for _, timeSeries := range triggerTimeSeries.Main {
if !timeSeries.Wildcard {
return false
}
}
return true
}