Rename histogram configuration bucketbounds to boundaries

docs/metrics/customizing-the-sdk/Program.cs

@@ -34,7 +34,7 @@ public static void Main(string[] args)
             .AddView(instrumentName: "MyCounter", name: "MyCounterRenamed")
 
             // Change Histogram bounds
-            .AddView(instrumentName: "MyHistogram", new HistogramConfiguration() { BucketBounds = new double[] { 10, 20 } })
+            .AddView(instrumentName: "MyHistogram", new HistogramConfiguration() { Boundaries = new double[] { 10, 20 } })
 
             // For the instrument "MyCounterCustomTags", aggregate with only the keys "tag1", "tag2".
             .AddView(instrumentName: "MyCounterCustomTags", new MetricStreamConfiguration() { TagKeys = new string[] { "tag1", "tag2" } })
@@ -48,7 +48,7 @@ public static void Main(string[] args)
                  if (instrument.Meter.Name.Equals("CompanyA.ProductB.Library2") &&
                      instrument.GetType().Name.Contains("Histogram"))
                  {
-                     return new HistogramConfiguration() { BucketBounds = new double[] { 10, 20 } };
+                     return new HistogramConfiguration() { Boundaries = new double[] { 10, 20 } };
                  }
 
                  return null;

src/OpenTelemetry/Metrics/HistogramConfiguration.cs

@@ -23,12 +23,13 @@ public class HistogramConfiguration : MetricStreamConfiguration
         private Aggregation aggregation = Aggregation.Histogram;
 
         /// <summary>
-        /// Gets or sets the custom histogram bounds.
+        /// Gets or sets the values representing explicit histogram bucket
+        /// boundary values.
         /// </summary>
         /// <remarks>
         /// The array must be in ascending order with distinct values.
         /// </remarks>
-        public double[] BucketBounds { get; set; }
+        public double[] Boundaries { get; set; }
 
         public override Aggregation Aggregation
         {

src/OpenTelemetry/Metrics/MeterProviderBuilderExtensions.cs

@@ -89,9 +89,9 @@ public static MeterProviderBuilder AddView(this MeterProviderBuilder meterProvid
             if (metricStreamConfiguration is HistogramConfiguration histogramConfiguration)
             {
                 // Validate histogram bounds
-                if (histogramConfiguration.BucketBounds != null && !IsSortedAndDistinct(histogramConfiguration.BucketBounds))
+                if (histogramConfiguration.Boundaries != null && !IsSortedAndDistinct(histogramConfiguration.Boundaries))
                 {
-                    throw new ArgumentException($"Histogram bounds must be in ascending order with distinct values", nameof(histogramConfiguration.BucketBounds));
+                    throw new ArgumentException($"Histogram bounds must be in ascending order with distinct values", nameof(histogramConfiguration.Boundaries));
                 }
             }
 

src/OpenTelemetry/Metrics/MeterProviderSdk.cs

@@ -196,7 +196,7 @@ internal MeterProviderSdk(
                                 var metricDescription = metricStreamConfig?.Description ?? instrument.Description;
                                 string[] tagKeysInteresting = metricStreamConfig?.TagKeys;
                                 double[] histogramBucketBounds = (metricStreamConfig is HistogramConfiguration histogramConfig
-                                    && histogramConfig.BucketBounds != null) ? histogramConfig.BucketBounds : null;
+                                    && histogramConfig.Boundaries != null) ? histogramConfig.Boundaries : null;
                                 metric = new Metric(instrument, temporality, metricName, metricDescription, histogramBucketBounds, tagKeysInteresting);
 
                                 this.metrics[index] = metric;

test/OpenTelemetry.Tests/Metrics/MetricViewTests.cs

@@ -97,7 +97,7 @@ public void AddViewWithNullMetricStreamConfigurationThrowsArgumentnullException(
         public void AddViewWithInvalidHistogramBoundsThrowsArgumentException(double[] bounds)
         {
             var ex = Assert.Throws<ArgumentException>(() => Sdk.CreateMeterProviderBuilder()
-                .AddView("name1", new HistogramConfiguration { BucketBounds = bounds }));
+                .AddView("name1", new HistogramConfiguration { Boundaries = bounds }));
 
             Assert.Contains("Histogram bounds must be in ascending order with distinct values", ex.Message);
         }
@@ -359,7 +359,7 @@ public void ViewToProduceCustomHistogramBound()
             using var meterProvider = Sdk.CreateMeterProviderBuilder()
                 .AddMeter(meter.Name)
                 .AddView("MyHistogram", new HistogramConfiguration() { Name = "MyHistogramDefaultBound" })
-                .AddView("MyHistogram", new HistogramConfiguration() { BucketBounds = bounds })
+                .AddView("MyHistogram", new HistogramConfiguration() { Boundaries = bounds })
                 .AddInMemoryExporter(exportedItems)
                 .Build();