/
map_tags.go
75 lines (64 loc) · 2.35 KB
/
map_tags.go
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// Copyright (c) 2020 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package remote
import (
"bytes"
"errors"
"github.com/m3db/m3/src/query/api/v1/handler/prometheus/handleroptions"
"github.com/m3db/m3/src/query/generated/proto/prompb"
)
// mapTags modifies a given write request based on the tag mappers passed.
func mapTags(req *prompb.WriteRequest, opts handleroptions.MapTagsOptions) error {
for _, mapper := range opts.TagMappers {
if err := mapper.Validate(); err != nil {
return err
}
if op := mapper.Write; !op.IsEmpty() {
tag := []byte(op.Tag)
value := []byte(op.Value)
for i, ts := range req.Timeseries {
replaced := false
for j, l := range ts.Labels {
if bytes.Equal(l.Name, tag) {
ts.Labels[j].Value = value
replaced = true
}
}
if !replaced {
// No existing labels with this tag, append it.
req.Timeseries[i].Labels = append(ts.Labels, prompb.Label{
Name: tag,
Value: value,
})
}
}
}
if op := mapper.Drop; !op.IsEmpty() {
return errors.New("Drop operation is not yet supported")
}
if op := mapper.DropWithValue; !op.IsEmpty() {
return errors.New("DropWithValue operation is not yet supported")
}
if op := mapper.Replace; !op.IsEmpty() {
return errors.New("Replace operation is not yet supported")
}
}
return nil
}