Export remote.LabelsToLabelsProto() and remote.LabelProtosToLabels()

Signed-off-by: Marco Pracucci <marco@pracucci.com>

storage/remote/codec.go

@@ -166,7 +166,7 @@ func ToQueryResult(ss storage.SeriesSet, sampleLimit int) (*prompb.QueryResult,
 		}
 
 		resp.Timeseries = append(resp.Timeseries, &prompb.TimeSeries{
-			Labels:     labelsToLabelsProto(series.Labels(), nil),
+			Labels:     LabelsToLabelsProto(series.Labels(), nil),
 			Samples:    samples,
 			Histograms: histograms,
 		})
@@ -182,7 +182,7 @@ func FromQueryResult(sortSeries bool, res *prompb.QueryResult) storage.SeriesSet
 		if err := validateLabelsAndMetricName(ts.Labels); err != nil {
 			return errSeriesSet{err: err}
 		}
-		lbls := labelProtosToLabels(&b, ts.Labels)
+		lbls := LabelProtosToLabels(&b, ts.Labels)
 		series = append(series, &concreteSeries{labels: lbls, floats: ts.Samples, histograms: ts.Histograms})
 	}
 
@@ -235,7 +235,7 @@ func StreamChunkedReadResponses(
 	for ss.Next() {
 		series := ss.At()
 		iter = series.Iterator(iter)
-		lbls = MergeLabels(labelsToLabelsProto(series.Labels(), lbls), sortedExternalLabels)
+		lbls = MergeLabels(LabelsToLabelsProto(series.Labels(), lbls), sortedExternalLabels)
 
 		maxDataLength := maxBytesInFrame
 		for _, lbl := range lbls {
@@ -622,7 +622,7 @@ func exemplarProtoToExemplar(b *labels.ScratchBuilder, ep prompb.Exemplar) exemp
 	timestamp := ep.Timestamp
 
 	return exemplar.Exemplar{
-		Labels: labelProtosToLabels(b, ep.Labels),
+		Labels: LabelProtosToLabels(b, ep.Labels),
 		Value:  ep.Value,
 		Ts:     timestamp,
 		HasTs:  timestamp != 0,
@@ -762,7 +762,9 @@ func LabelProtosToMetric(labelPairs []*prompb.Label) model.Metric {
 	return metric
 }
 
-func labelProtosToLabels(b *labels.ScratchBuilder, labelPairs []prompb.Label) labels.Labels {
+// LabelProtosToLabels transforms prompb labels into labels. The labels builder
+// will be used to build the returned labels.
+func LabelProtosToLabels(b *labels.ScratchBuilder, labelPairs []prompb.Label) labels.Labels {
 	b.Reset()
 	for _, l := range labelPairs {
 		b.Add(l.Name, l.Value)
@@ -771,9 +773,9 @@ func labelProtosToLabels(b *labels.ScratchBuilder, labelPairs []prompb.Label) la
 	return b.Labels()
 }
 
-// labelsToLabelsProto transforms labels into prompb labels. The buffer slice
+// LabelsToLabelsProto transforms labels into prompb labels. The buffer slice
 // will be used to avoid allocations if it is big enough to store the labels.
-func labelsToLabelsProto(lbls labels.Labels, buf []prompb.Label) []prompb.Label {
+func LabelsToLabelsProto(lbls labels.Labels, buf []prompb.Label) []prompb.Label {
 	result := buf[:0]
 	lbls.Range(func(l labels.Label) {
 		result = append(result, prompb.Label{

storage/remote/codec_test.go

@@ -729,8 +729,8 @@ func TestFloatHistogramToProtoConvert(t *testing.T) {
 }
 
 func TestStreamResponse(t *testing.T) {
-	lbs1 := labelsToLabelsProto(labels.FromStrings("instance", "localhost1", "job", "demo1"), nil)
-	lbs2 := labelsToLabelsProto(labels.FromStrings("instance", "localhost2", "job", "demo2"), nil)
+	lbs1 := LabelsToLabelsProto(labels.FromStrings("instance", "localhost1", "job", "demo1"), nil)
+	lbs2 := LabelsToLabelsProto(labels.FromStrings("instance", "localhost2", "job", "demo2"), nil)
 	chunk := prompb.Chunk{
 		Type: prompb.Chunk_XOR,
 		Data: make([]byte, 100),
@@ -802,7 +802,7 @@ func (c *mockChunkSeriesSet) Next() bool {
 
 func (c *mockChunkSeriesSet) At() storage.ChunkSeries {
 	return &storage.ChunkSeriesEntry{
-		Lset: labelProtosToLabels(&c.builder, c.chunkedSeries[c.index].Labels),
+		Lset: LabelProtosToLabels(&c.builder, c.chunkedSeries[c.index].Labels),
 		ChunkIteratorFn: func(chunks.Iterator) chunks.Iterator {
 			return &mockChunkIterator{
 				chunks: c.chunkedSeries[c.index].Chunks,

storage/remote/queue_manager.go

@@ -1507,7 +1507,7 @@ func (s *shards) populateTimeSeries(batch []timeSeries, pendingData []prompb.Tim
 		// Number of pending samples is limited by the fact that sendSamples (via sendSamplesWithBackoff)
 		// retries endlessly, so once we reach max samples, if we can never send to the endpoint we'll
 		// stop reading from the queue. This makes it safe to reference pendingSamples by index.
-		pendingData[nPending].Labels = labelsToLabelsProto(d.seriesLabels, pendingData[nPending].Labels)
+		pendingData[nPending].Labels = LabelsToLabelsProto(d.seriesLabels, pendingData[nPending].Labels)
 		switch d.sType {
 		case tSample:
 			pendingData[nPending].Samples = append(pendingData[nPending].Samples, prompb.Sample{
@@ -1517,7 +1517,7 @@ func (s *shards) populateTimeSeries(batch []timeSeries, pendingData []prompb.Tim
 			nPendingSamples++
 		case tExemplar:
 			pendingData[nPending].Exemplars = append(pendingData[nPending].Exemplars, prompb.Exemplar{
-				Labels:    labelsToLabelsProto(d.exemplarLabels, nil),
+				Labels:    LabelsToLabelsProto(d.exemplarLabels, nil),
 				Value:     d.value,
 				Timestamp: d.timestamp,
 			})

storage/remote/queue_manager_test.go

@@ -742,7 +742,7 @@ func (c *TestWriteClient) expectExemplars(ss []record.RefExemplar, series []reco
 	for _, s := range ss {
 		seriesName := getSeriesNameFromRef(series[s.Ref])
 		e := prompb.Exemplar{
-			Labels:    labelsToLabelsProto(s.Labels, nil),
+			Labels:    LabelsToLabelsProto(s.Labels, nil),
 			Timestamp: s.T,
 			Value:     s.V,
 		}
@@ -826,7 +826,7 @@ func (c *TestWriteClient) Store(_ context.Context, req []byte, _ int) error {
 	builder := labels.NewScratchBuilder(0)
 	count := 0
 	for _, ts := range reqProto.Timeseries {
-		labels := labelProtosToLabels(&builder, ts.Labels)
+		labels := LabelProtosToLabels(&builder, ts.Labels)
 		seriesName := labels.Get("__name__")
 		for _, sample := range ts.Samples {
 			count++

storage/remote/read_test.go

@@ -172,12 +172,12 @@ func TestSeriesSetFilter(t *testing.T) {
 			toRemove: []string{"foo"},
 			in: &prompb.QueryResult{
 				Timeseries: []*prompb.TimeSeries{
-					{Labels: labelsToLabelsProto(labels.FromStrings("foo", "bar", "a", "b"), nil)},
+					{Labels: LabelsToLabelsProto(labels.FromStrings("foo", "bar", "a", "b"), nil)},
 				},
 			},
 			expected: &prompb.QueryResult{
 				Timeseries: []*prompb.TimeSeries{
-					{Labels: labelsToLabelsProto(labels.FromStrings("a", "b"), nil)},
+					{Labels: LabelsToLabelsProto(labels.FromStrings("a", "b"), nil)},
 				},
 			},
 		},
@@ -211,7 +211,7 @@ func (c *mockedRemoteClient) Read(_ context.Context, query *prompb.Query) (*prom
 
 	q := &prompb.QueryResult{}
 	for _, s := range c.store {
-		l := labelProtosToLabels(&c.b, s.Labels)
+		l := LabelProtosToLabels(&c.b, s.Labels)
 		var notMatch bool
 
 		for _, m := range matchers {

storage/remote/write_handler.go

@@ -116,7 +116,7 @@ func (h *writeHandler) write(ctx context.Context, req *prompb.WriteRequest) (err
 	b := labels.NewScratchBuilder(0)
 	var exemplarErr error
 	for _, ts := range req.Timeseries {
-		labels := labelProtosToLabels(&b, ts.Labels)
+		labels := LabelProtosToLabels(&b, ts.Labels)
 		if !labels.IsValid() {
 			level.Warn(h.logger).Log("msg", "Invalid metric names or labels", "got", labels.String())
 			samplesWithInvalidLabels++

storage/remote/write_handler_test.go

@@ -60,14 +60,14 @@ func TestRemoteWriteHandler(t *testing.T) {
 	j := 0
 	k := 0
 	for _, ts := range writeRequestFixture.Timeseries {
-		labels := labelProtosToLabels(&b, ts.Labels)
+		labels := LabelProtosToLabels(&b, ts.Labels)
 		for _, s := range ts.Samples {
 			requireEqual(t, mockSample{labels, s.Timestamp, s.Value}, appendable.samples[i])
 			i++
 		}
 
 		for _, e := range ts.Exemplars {
-			exemplarLabels := labelProtosToLabels(&b, e.Labels)
+			exemplarLabels := LabelProtosToLabels(&b, e.Labels)
 			requireEqual(t, mockExemplar{labels, exemplarLabels, e.Timestamp, e.Value}, appendable.exemplars[j])
 			j++
 		}