func (c *QueryCondition) Eval(context *alerting.EvalContext) (*alerting.ConditionResult, error) {
timeRange := tsdb.NewTimeRange(c.Query.From, c.Query.To)
seriesList, err := c.executeQuery(context, timeRange)
if err != nil {
return nil, err
}
emptySerieCount := 0
evalMatchCount := 0
var matches []*alerting.EvalMatch
for _, series := range seriesList {
reducedValue := c.Reducer.Reduce(series)
evalMatch := c.Evaluator.Eval(reducedValue)
if reducedValue.Valid == false {
emptySerieCount++
}
if context.IsTestRun {
context.Logs = append(context.Logs, &alerting.ResultLogEntry{
Message: fmt.Sprintf("Condition[%d]: Eval: %v, Metric: %s, Value: %s", c.Index, evalMatch, series.Name, reducedValue),
})
}
if evalMatch {
evalMatchCount++
matches = append(matches, &alerting.EvalMatch{
Metric: series.Name,
Value: reducedValue,
})
}
}
// handle no series special case
if len(seriesList) == 0 {
// eval condition for null value
evalMatch := c.Evaluator.Eval(null.FloatFromPtr(nil))
if context.IsTestRun {
context.Logs = append(context.Logs, &alerting.ResultLogEntry{
Message: fmt.Sprintf("Condition[%d]: Eval: %v, Query Returned No Series (reduced to null/no value)", evalMatch),
})
}
if evalMatch {
evalMatchCount++
matches = append(matches, &alerting.EvalMatch{Metric: "NoData", Value: null.FloatFromPtr(nil)})
}
}
return &alerting.ConditionResult{
Firing: evalMatchCount > 0,
NoDataFound: emptySerieCount == len(seriesList),
Operator: c.Operator,
EvalMatches: matches,
}, nil
}
func (c *QueryCondition) executeQuery(context *alerting.EvalContext, timeRange *tsdb.TimeRange) (tsdb.TimeSeriesSlice, error) {
getDsInfo := &m.GetDataSourceByIdQuery{
Id: c.Query.DatasourceId,
OrgId: context.Rule.OrgId,
}
if err := bus.Dispatch(getDsInfo); err != nil {
return nil, fmt.Errorf("Could not find datasource")
}
req := c.getRequestForAlertRule(getDsInfo.Result, timeRange)
result := make(tsdb.TimeSeriesSlice, 0)
resp, err := c.HandleRequest(context.Ctx, req)
if err != nil {
return nil, fmt.Errorf("tsdb.HandleRequest() error %v", err)
}
for _, v := range resp.Results {
if v.Error != nil {
return nil, fmt.Errorf("tsdb.HandleRequest() response error %v", v)
}
result = append(result, v.Series...)
if context.IsTestRun {
context.Logs = append(context.Logs, &alerting.ResultLogEntry{
Message: fmt.Sprintf("Condition[%d]: Query Result", c.Index),
Data: v.Series,
})
}
}
return result, nil
}
func (c *QueryCondition) Eval(context *alerting.EvalContext) {
timerange := tsdb.NewTimerange(c.Query.From, c.Query.To)
seriesList, err := c.executeQuery(context, timerange)
if err != nil {
context.Error = err
return
}
emptySerieCount := 0
for _, series := range seriesList {
reducedValue := c.Reducer.Reduce(series)
evalMatch := c.Evaluator.Eval(reducedValue)
if reducedValue == nil {
emptySerieCount++
continue
}
if context.IsTestRun {
context.Logs = append(context.Logs, &alerting.ResultLogEntry{
Message: fmt.Sprintf("Condition[%d]: Eval: %v, Metric: %s, Value: %1.3f", c.Index, evalMatch, series.Name, *reducedValue),
})
}
if evalMatch {
context.EvalMatches = append(context.EvalMatches, &alerting.EvalMatch{
Metric: series.Name,
Value: *reducedValue,
})
}
}
context.NoDataFound = emptySerieCount == len(seriesList)
context.Firing = len(context.EvalMatches) > 0
}
func (c *QueryCondition) Eval(context *alerting.EvalContext) (*alerting.ConditionResult, error) {
timeRange := tsdb.NewTimeRange(c.Query.From, c.Query.To)
seriesList, err := c.executeQuery(context, timeRange)
if err != nil {
return nil, err
}
emptySerieCount := 0
evalMatchCount := 0
var matches []*alerting.EvalMatch
for _, series := range seriesList {
reducedValue := c.Reducer.Reduce(series)
evalMatch := c.Evaluator.Eval(reducedValue)
if reducedValue.Valid == false {
emptySerieCount++
continue
}
if context.IsTestRun {
context.Logs = append(context.Logs, &alerting.ResultLogEntry{
Message: fmt.Sprintf("Condition[%d]: Eval: %v, Metric: %s, Value: %1.3f", c.Index, evalMatch, series.Name, reducedValue.Float64),
})
}
if evalMatch {
evalMatchCount++
matches = append(matches, &alerting.EvalMatch{
Metric: series.Name,
Value: reducedValue.Float64,
})
}
}
return &alerting.ConditionResult{
Firing: evalMatchCount > 0,
NoDataFound: emptySerieCount == len(seriesList),
Operator: c.Operator,
EvalMatches: matches,
}, nil
}