Additional extension method for otlp log exporter to configure processor options (#4733)

src/OpenTelemetry.Exporter.OpenTelemetryProtocol/.publicApi/net462/PublicAPI.Unshipped.txt

@@ -1,3 +1,4 @@
 OpenTelemetry.Logs.OtlpLogExporterHelperExtensions
 static OpenTelemetry.Logs.OtlpLogExporterHelperExtensions.AddOtlpExporter(this OpenTelemetry.Logs.OpenTelemetryLoggerOptions loggerOptions) -> OpenTelemetry.Logs.OpenTelemetryLoggerOptions
+static OpenTelemetry.Logs.OtlpLogExporterHelperExtensions.AddOtlpExporter(this OpenTelemetry.Logs.OpenTelemetryLoggerOptions loggerOptions, System.Action<OpenTelemetry.Exporter.OtlpExporterOptions, OpenTelemetry.Logs.LogRecordExportProcessorOptions> configureExporterAndProcessor) -> OpenTelemetry.Logs.OpenTelemetryLoggerOptions
 static OpenTelemetry.Logs.OtlpLogExporterHelperExtensions.AddOtlpExporter(this OpenTelemetry.Logs.OpenTelemetryLoggerOptions loggerOptions, System.Action<OpenTelemetry.Exporter.OtlpExporterOptions> configure) -> OpenTelemetry.Logs.OpenTelemetryLoggerOptions

src/OpenTelemetry.Exporter.OpenTelemetryProtocol/.publicApi/net6.0/PublicAPI.Unshipped.txt

@@ -1,3 +1,4 @@
 OpenTelemetry.Logs.OtlpLogExporterHelperExtensions
 static OpenTelemetry.Logs.OtlpLogExporterHelperExtensions.AddOtlpExporter(this OpenTelemetry.Logs.OpenTelemetryLoggerOptions loggerOptions) -> OpenTelemetry.Logs.OpenTelemetryLoggerOptions
+static OpenTelemetry.Logs.OtlpLogExporterHelperExtensions.AddOtlpExporter(this OpenTelemetry.Logs.OpenTelemetryLoggerOptions loggerOptions, System.Action<OpenTelemetry.Exporter.OtlpExporterOptions, OpenTelemetry.Logs.LogRecordExportProcessorOptions> configureExporterAndProcessor) -> OpenTelemetry.Logs.OpenTelemetryLoggerOptions
 static OpenTelemetry.Logs.OtlpLogExporterHelperExtensions.AddOtlpExporter(this OpenTelemetry.Logs.OpenTelemetryLoggerOptions loggerOptions, System.Action<OpenTelemetry.Exporter.OtlpExporterOptions> configure) -> OpenTelemetry.Logs.OpenTelemetryLoggerOptions

src/OpenTelemetry.Exporter.OpenTelemetryProtocol/.publicApi/netstandard2.0/PublicAPI.Unshipped.txt

@@ -1,3 +1,4 @@
 OpenTelemetry.Logs.OtlpLogExporterHelperExtensions
 static OpenTelemetry.Logs.OtlpLogExporterHelperExtensions.AddOtlpExporter(this OpenTelemetry.Logs.OpenTelemetryLoggerOptions loggerOptions) -> OpenTelemetry.Logs.OpenTelemetryLoggerOptions
+static OpenTelemetry.Logs.OtlpLogExporterHelperExtensions.AddOtlpExporter(this OpenTelemetry.Logs.OpenTelemetryLoggerOptions loggerOptions, System.Action<OpenTelemetry.Exporter.OtlpExporterOptions, OpenTelemetry.Logs.LogRecordExportProcessorOptions> configureExporterAndProcessor) -> OpenTelemetry.Logs.OpenTelemetryLoggerOptions
 static OpenTelemetry.Logs.OtlpLogExporterHelperExtensions.AddOtlpExporter(this OpenTelemetry.Logs.OpenTelemetryLoggerOptions loggerOptions, System.Action<OpenTelemetry.Exporter.OtlpExporterOptions> configure) -> OpenTelemetry.Logs.OpenTelemetryLoggerOptions

src/OpenTelemetry.Exporter.OpenTelemetryProtocol/.publicApi/netstandard2.1/PublicAPI.Unshipped.txt

@@ -1,3 +1,4 @@
 OpenTelemetry.Logs.OtlpLogExporterHelperExtensions
 static OpenTelemetry.Logs.OtlpLogExporterHelperExtensions.AddOtlpExporter(this OpenTelemetry.Logs.OpenTelemetryLoggerOptions loggerOptions) -> OpenTelemetry.Logs.OpenTelemetryLoggerOptions
+static OpenTelemetry.Logs.OtlpLogExporterHelperExtensions.AddOtlpExporter(this OpenTelemetry.Logs.OpenTelemetryLoggerOptions loggerOptions, System.Action<OpenTelemetry.Exporter.OtlpExporterOptions, OpenTelemetry.Logs.LogRecordExportProcessorOptions> configureExporterAndProcessor) -> OpenTelemetry.Logs.OpenTelemetryLoggerOptions
 static OpenTelemetry.Logs.OtlpLogExporterHelperExtensions.AddOtlpExporter(this OpenTelemetry.Logs.OpenTelemetryLoggerOptions loggerOptions, System.Action<OpenTelemetry.Exporter.OtlpExporterOptions> configure) -> OpenTelemetry.Logs.OpenTelemetryLoggerOptions

src/OpenTelemetry.Exporter.OpenTelemetryProtocol/CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+* Added extension method for configuring export processor options for otlp log
+exporter.
+([#4733](https://github.com/open-telemetry/opentelemetry-dotnet/pull/4733))
+
 * Added support for configuring the metric exporter's temporality using the
   environment variable `OTEL_EXPORTER_OTLP_METRICS_TEMPORALITY_PREFERENCE` as
   defined in the

src/OpenTelemetry.Exporter.OpenTelemetryProtocol/OtlpExporterOptions.cs

@@ -150,11 +150,13 @@ public class OtlpExporterOptions
     /// <summary>
     /// Gets or sets the export processor type to be used with the OpenTelemetry Protocol Exporter. The default value is <see cref="ExportProcessorType.Batch"/>.
     /// </summary>
+    /// <remarks>Note: This only applies when exporting traces.</remarks>
     public ExportProcessorType ExportProcessorType { get; set; } = ExportProcessorType.Batch;
 
     /// <summary>
     /// Gets or sets the BatchExportProcessor options. Ignored unless ExportProcessorType is Batch.
     /// </summary>
+    /// <remarks>Note: This only applies when exporting traces.</remarks>
     public BatchExportProcessorOptions<Activity> BatchExportProcessorOptions { get; set; }
 
     /// <summary>

src/OpenTelemetry.Exporter.OpenTelemetryProtocol/OtlpLogExporterHelperExtensions.cs

@@ -14,7 +14,7 @@
 // limitations under the License.
 // </copyright>
 
-using System.Diagnostics;
+using Microsoft.Extensions.Logging;
 using OpenTelemetry.Exporter;
 
 namespace OpenTelemetry.Logs;
@@ -25,7 +25,7 @@ namespace OpenTelemetry.Logs;
 public static class OtlpLogExporterHelperExtensions
 {
     /// <summary>
-    /// Adds OTLP Exporter as a configuration to the OpenTelemetry ILoggingBuilder.
+    /// Adds an OTLP Exporter to the OpenTelemetry <see cref="ILoggerProvider"/>.
     /// </summary>
     /// <remarks><inheritdoc cref="AddOtlpExporter(OpenTelemetryLoggerOptions, Action{OtlpExporterOptions})" path="/remarks"/></remarks>
     /// <param name="loggerOptions"><see cref="OpenTelemetryLoggerOptions"/> options to use.</param>
@@ -34,7 +34,7 @@ public static class OtlpLogExporterHelperExtensions
         => AddOtlpExporterInternal(loggerOptions, configure: null);
 
     /// <summary>
-    /// Adds OTLP Exporter as a configuration to the OpenTelemetry ILoggingBuilder.
+    /// Adds an OTLP Exporter to the OpenTelemetry <see cref="ILoggerProvider"/>.
     /// </summary>
     /// <param name="loggerOptions"><see cref="OpenTelemetryLoggerOptions"/> options to use.</param>
     /// <param name="configure">Callback action for configuring <see cref="OtlpExporterOptions"/>.</param>
@@ -44,29 +44,55 @@ public static class OtlpLogExporterHelperExtensions
         Action<OtlpExporterOptions> configure)
         => AddOtlpExporterInternal(loggerOptions, configure);
 
+    /// <summary>
+    /// Adds an OTLP Exporter to the OpenTelemetry <see cref="ILoggerProvider"/>.
+    /// </summary>
+    /// <param name="loggerOptions"><see cref="OpenTelemetryLoggerOptions"/> options to use.</param>
+    /// <param name="configureExporterAndProcessor">Callback action for configuring <see cref="OtlpExporterOptions"/> and <see cref="LogRecordExportProcessorOptions"/>.</param>
+    /// <returns>The instance of <see cref="OpenTelemetryLoggerOptions"/> to chain the calls.</returns>
+    public static OpenTelemetryLoggerOptions AddOtlpExporter(
+        this OpenTelemetryLoggerOptions loggerOptions,
+        Action<OtlpExporterOptions, LogRecordExportProcessorOptions> configureExporterAndProcessor)
+    {
+        var exporterOptions = new OtlpExporterOptions();
+        var processorOptions = new LogRecordExportProcessorOptions();
+
+        configureExporterAndProcessor?.Invoke(exporterOptions, processorOptions);
+
+        return AddOtlpLogExporterInternal(
+             loggerOptions,
+             exporterOptions: exporterOptions,
+             processorOptions: processorOptions);
+    }
+
     private static OpenTelemetryLoggerOptions AddOtlpExporterInternal(
         OpenTelemetryLoggerOptions loggerOptions,
         Action<OtlpExporterOptions> configure)
     {
         var exporterOptions = new OtlpExporterOptions();
 
-        // TODO: We are using span/activity batch environment variable keys
-        // here when we should be using the ones for logs.
-        var defaultBatchOptions = exporterOptions.BatchExportProcessorOptions;
-
-        Debug.Assert(defaultBatchOptions != null, "defaultBatchOptions was null");
-
         configure?.Invoke(exporterOptions);
 
+        return AddOtlpLogExporterInternal(
+            loggerOptions,
+            exporterOptions: exporterOptions,
+            processorOptions: new());
+    }
+
+    private static OpenTelemetryLoggerOptions AddOtlpLogExporterInternal(
+        OpenTelemetryLoggerOptions loggerOptions,
+        OtlpExporterOptions exporterOptions,
+        LogRecordExportProcessorOptions processorOptions)
+    {
         var otlpExporter = new OtlpLogExporter(exporterOptions);
 
-        if (exporterOptions.ExportProcessorType == ExportProcessorType.Simple)
+        if (processorOptions.ExportProcessorType == ExportProcessorType.Simple)
         {
             loggerOptions.AddProcessor(new SimpleLogRecordExportProcessor(otlpExporter));
         }
         else
         {
-            var batchOptions = exporterOptions.BatchExportProcessorOptions ?? defaultBatchOptions;
+            var batchOptions = processorOptions.BatchExportProcessorOptions;
 
             loggerOptions.AddProcessor(new BatchLogRecordExportProcessor(
                 otlpExporter,

src/OpenTelemetry/Logs/ILogger/OpenTelemetryLoggingExtensions.cs

@@ -38,9 +38,15 @@ public static class OpenTelemetryLoggingExtensions
     /// Adds an OpenTelemetry logger named 'OpenTelemetry' to the <see cref="ILoggerFactory"/>.
     /// </summary>
     /// <remarks>
-    /// Note: This is safe to be called multiple times and by library
-    /// authors. Only a single <see cref="OpenTelemetryLoggerProvider"/>
-    /// will be created for a given <see cref="IServiceCollection"/>.
+    /// Notes:
+    /// <list type="bullet">
+    /// <item>This is safe to be called multiple times and by library authors.
+    /// Only a single <see cref="OpenTelemetryLoggerProvider"/> will be created
+    /// for a given <see cref="IServiceCollection"/>.</item>
+    /// <item><see cref="IServiceCollection"/> / <see cref="IServiceProvider"/>
+    /// features (DI, Options, IConfiguration, etc.) are not available when
+    /// using <see cref="ILoggingBuilder"/>.</item>
+    /// </list>
     /// </remarks>
     /// <param name="builder">The <see cref="ILoggingBuilder"/> to use.</param>
     /// <returns>The supplied <see cref="ILoggingBuilder"/> for call chaining.</returns>

test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/OtlpLogExporterTests.cs

@@ -14,8 +14,10 @@
 // limitations under the License.
 // </copyright>
 
+using System.Collections.Generic;
 using System.Collections.ObjectModel;
 using System.Diagnostics;
+using System.Reflection;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
 using Microsoft.Extensions.Logging;
@@ -1128,6 +1130,61 @@ public class OtlpLogExporterTests : Http2UnencryptedSupportTests
         Assert.Contains(scopeValue2, allScopeValues);
     }
 
+    [Fact]
+    public void AddOtlpLogExporterDefaultOptionsTest()
+    {
+        var options = new OpenTelemetryLoggerOptions();
+
+        options.AddOtlpExporter();
+
+        var processors = (List<BaseProcessor<LogRecord>>)typeof(OpenTelemetryLoggerOptions).GetField("Processors", BindingFlags.Instance | BindingFlags.NonPublic).GetValue(options);
+
+        Assert.Single(processors);
+
+        var batchProcesor = processors[0] as BatchLogRecordExportProcessor;
+
+        Assert.NotNull(batchProcesor);
+
+        var batchProcessorType = typeof(BatchExportProcessor<LogRecord>);
+
+        Assert.Equal(5000, batchProcessorType.GetField("scheduledDelayMilliseconds", BindingFlags.Instance | BindingFlags.NonPublic).GetValue(batchProcesor));
+    }
+
+    [Theory]
+    [InlineData(ExportProcessorType.Simple)]
+    [InlineData(ExportProcessorType.Batch)]
+    public void AddOtlpLogExporterLogRecordProcessorOptionsTest(ExportProcessorType processorType)
+    {
+        var options = new OpenTelemetryLoggerOptions();
+
+        options.AddOtlpExporter((o, l) =>
+        {
+            l.ExportProcessorType = processorType;
+            l.BatchExportProcessorOptions = new BatchExportLogRecordProcessorOptions() { ScheduledDelayMilliseconds = 1000 };
+        });
+
+        var processors = (List<BaseProcessor<LogRecord>>)typeof(OpenTelemetryLoggerOptions).GetField("Processors", BindingFlags.Instance | BindingFlags.NonPublic).GetValue(options);
+
+        Assert.Single(processors);
+
+        if (processorType == ExportProcessorType.Batch)
+        {
+            var batchProcesor = processors[0] as BatchLogRecordExportProcessor;
+
+            Assert.NotNull(batchProcesor);
+
+            var batchProcessorType = typeof(BatchExportProcessor<LogRecord>);
+
+            Assert.Equal(1000, batchProcessorType.GetField("scheduledDelayMilliseconds", BindingFlags.Instance | BindingFlags.NonPublic).GetValue(batchProcesor));
+        }
+        else
+        {
+            var simpleProcesor = processors[0] as SimpleLogRecordExportProcessor;
+
+            Assert.NotNull(simpleProcesor);
+        }
+    }
+
     private static OtlpCommon.KeyValue TryGetAttribute(OtlpLogs.LogRecord record, string key)
     {
         return record.Attributes.FirstOrDefault(att => att.Key == key);