rename Histogram to HistogramReservoir

CHANGELOG.md

@@ -11,9 +11,10 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 ### Added
 
 - Add `go.opentelemetry.io/otel/sdk/metric/exemplar` package which includes
-  `Exemplar`, `Filter`, `SampledFilter`, `AlwaysOnFilter`, `Histogram`,
-  `FixedSizeReservoir`, `Reservoir`, `Value` and `ValueType` types. These will be used
-  for configuring the exemplar reservoir for the metrics sdk. (#5747)
+  `Exemplar`, `Filter`, `SampledFilter`, `AlwaysOnFilter`,
+  `HistogramReservoir`, `FixedSizeReservoir`, `Reservoir`, `Value` and
+  `ValueType` types. These will be used for configuring the exemplar reservoir
+  for the metrics sdk. (#5747)
 
 ### Changed
 

sdk/metric/exemplar.go

@@ -44,7 +44,7 @@ func reservoirFunc[N int64 | float64](agg Aggregation) func() aggregate.Filtered
 		cp := slices.Clone(a.Boundaries)
 		return func() aggregate.FilteredExemplarReservoir[N] {
 			bounds := cp
-			return aggregate.NewFilteredExemplarReservoir[N](filter, exemplar.Histogram(bounds))
+			return aggregate.NewFilteredExemplarReservoir[N](filter, exemplar.HistogramReservoir(bounds))
 		}
 	}
 

sdk/metric/exemplar/hist.go → sdk/metric/exemplar/histogram_reservoir.go

@@ -12,12 +12,12 @@ import (
 	"go.opentelemetry.io/otel/attribute"
 )
 
-// Histogram returns a [Reservoir] that samples the last measurement that falls
+// HistogramReservoir returns a [Reservoir] that samples the last measurement that falls
 // within a histogram bucket. The histogram bucket upper-boundaries are define
 // by bounds.
 //
 // The passed bounds will be sorted by this function.
-func Histogram(bounds []float64) Reservoir {
+func HistogramReservoir(bounds []float64) Reservoir {
 	slices.Sort(bounds)
 	return &histRes{
 		bounds:  bounds,

sdk/metric/exemplar/hist_test.go → sdk/metric/exemplar/histogram_reservoir_test.go

@@ -8,10 +8,10 @@ import "testing"
 func TestHist(t *testing.T) {
 	bounds := []float64{0, 100}
 	t.Run("Int64", ReservoirTest[int64](func(int) (Reservoir, int) {
-		return Histogram(bounds), len(bounds)
+		return HistogramReservoir(bounds), len(bounds)
 	}))
 
 	t.Run("Float64", ReservoirTest[float64](func(int) (Reservoir, int) {
-		return Histogram(bounds), len(bounds)
+		return HistogramReservoir(bounds), len(bounds)
 	}))
 }