/
filter.go
38 lines (32 loc) · 1.07 KB
/
filter.go
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package dpsink
import (
"sync/atomic"
"context"
"github.com/signalfx/golib/v3/datapoint"
)
// EmptyMetricFilter filters empty metric name datapoints
type EmptyMetricFilter struct {
EmptyMetricFiltered int64
}
// FilterDatapoints returns points that have a non empty metric name
func (e *EmptyMetricFilter) FilterDatapoints(points []*datapoint.Datapoint) []*datapoint.Datapoint {
validDatapoints := make([]*datapoint.Datapoint, 0, len(points))
for _, dat := range points {
if dat.Metric != "" {
validDatapoints = append(validDatapoints, dat)
}
}
invalidDatumCount := int64(len(points) - len(validDatapoints))
if invalidDatumCount != 0 {
atomic.AddInt64(&e.EmptyMetricFiltered, invalidDatumCount)
}
return validDatapoints
}
// AddDatapoints will send points to the next sink that have a non empty metric name
func (e *EmptyMetricFilter) AddDatapoints(ctx context.Context, points []*datapoint.Datapoint, next Sink) error {
validDatapoints := e.FilterDatapoints(points)
if len(validDatapoints) == 0 {
return nil
}
return next.AddDatapoints(ctx, validDatapoints)
}