feat: Add support for non-core ASP.Net.

sdk/@launchdarkly/observability-dotnet/src/LaunchDarkly.Observability/Asp/Core/ObservabilityExtensions.cs

@@ -0,0 +1,105 @@
+using System;
+using System.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
+using LaunchDarkly.Observability.Otel;
+using LaunchDarkly.Logging;
+using LaunchDarkly.Observability.Logging;
+using LaunchDarkly.Observability.Sampling;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging;
+using OpenTelemetry;
+using OpenTelemetry.Resources;
+using OpenTelemetry.Trace;
+using OpenTelemetry.Exporter;
+using OpenTelemetry.Logs;
+using OpenTelemetry.Metrics;
+
+// ReSharper disable once CheckNamespace
+namespace LaunchDarkly.Observability
+{
+    /// <summary>
+    /// Static class containing extension methods for configuring observability
+    /// </summary>
+    public static class ObservabilityExtensions
+    {
+        private class LdObservabilityHostedService : IHostedService
+        {
+            private readonly ObservabilityConfig _config;
+            private readonly ILoggerProvider _loggerProvider;
+
+            public LdObservabilityHostedService(ObservabilityConfig config, IServiceProvider provider)
+            {
+                _loggerProvider = provider.GetService<ILoggerProvider>();
+                _config = config;
+            }
+
+            public Task StartAsync(CancellationToken cancellationToken)
+            {
+                Observe.Initialize(_config, _loggerProvider);
+                return Task.CompletedTask;
+            }
+
+            public Task StopAsync(CancellationToken cancellationToken) => Task.CompletedTask;
+        }
+
+        internal static void AddLaunchDarklyObservabilityWithConfig(this IServiceCollection services,
+            ObservabilityConfig config, Logger logger = null)
+        {
+            DebugLogger.SetLogger(logger);
+
+            var sampler = CommonOtelOptions.GetSampler(config);
+
+            var resourceBuilder = CommonOtelOptions.GetResourceBuilder(config);
+
+            services.AddOpenTelemetry().WithTracing(tracing =>
+            {
+                tracing
+                    .WithCommonLaunchDarklyConfig(config, resourceBuilder, sampler)
+                    .AddAspNetCoreInstrumentation(options => { options.RecordException = true; });
+            }).WithLogging(logging =>
+            {
+                logging.SetResourceBuilder(resourceBuilder)
+                    .AddProcessor(new SamplingLogProcessor(sampler))
+                    .AddOtlpExporter(options =>
+                    {
+                        options.WithCommonLaunchDarklyLoggingExport(config);
+                    });
+                config.ExtendedLoggerConfiguration?.Invoke(logging);
+            }).WithMetrics(metrics =>
+            {
+                metrics
+                    .WithCommonLaunchDarklyConfig(config, resourceBuilder)
+                    .AddAspNetCoreInstrumentation();
+            });
+
+            // Attach a hosted service which will allow us to get a logger provider instance from the built
+            // service collection.
+            services.AddHostedService((serviceProvider) =>
+                new LdObservabilityHostedService(config, serviceProvider));
+        }
+
+        /// <summary>
+        /// Add the LaunchDarkly Observability services. This function would typically be called by the LaunchDarkly
+        /// Observability plugin. This should only be called by the end user if the Observability plugin needs to be
+        /// initialized earlier than the LaunchDarkly client.
+        /// </summary>
+        /// <param name="services">The service collection</param>
+        /// <param name="sdkKey">The LaunchDarkly SDK</param>
+        /// <param name="configure">A method to configure the services</param>
+        /// <returns>The service collection</returns>
+        public static IServiceCollection AddLaunchDarklyObservability(
+            this IServiceCollection services,
+            string sdkKey,
+            Action<ObservabilityConfig.ObservabilityConfigBuilder> configure)
+        {
+            var builder = ObservabilityConfig.Builder();
+            configure(builder);
+
+            var config = builder.Build(sdkKey);
+            AddLaunchDarklyObservabilityWithConfig(services, config);
+            return services;
+        }
+    }
+}

sdk/@launchdarkly/observability-dotnet/src/LaunchDarkly.Observability/ObservabilityPlugin.cs → sdk/@launchdarkly/observability-dotnet/src/LaunchDarkly.Observability/Asp/Core/ObservabilityPlugin.cs

@@ -6,7 +6,9 @@
 using LaunchDarkly.Sdk.Server.Plugins;
 using LaunchDarkly.Sdk.Server.Telemetry;
 using Microsoft.Extensions.DependencyInjection;
+using OpenTelemetry.Logs;
 
+// ReSharper disable once CheckNamespace
 namespace LaunchDarkly.Observability
 {
     public class ObservabilityPlugin : Plugin
@@ -32,6 +34,7 @@ public class ObservabilityPlugin : Plugin
         /// <para>
         /// When using this builder, LaunchDarkly client must be constructed before your application is built.
         /// For example:
+        ///
         /// <code>
         /// var builder = WebApplication.CreateBuilder(args);
         ///

sdk/@launchdarkly/observability-dotnet/src/LaunchDarkly.Observability/Asp/Legacy/ObservabilityPlugin.cs

@@ -0,0 +1,78 @@
+using System;
+using System.Collections.Generic;
+using LaunchDarkly.Sdk.Integrations.Plugins;
+using LaunchDarkly.Sdk.Server.Hooks;
+using LaunchDarkly.Sdk.Server.Interfaces;
+using LaunchDarkly.Sdk.Server.Plugins;
+using LaunchDarkly.Sdk.Server.Telemetry;
+using Microsoft.Extensions.DependencyInjection;
+using OpenTelemetry.Logs;
+
+// ReSharper disable once CheckNamespace
+namespace LaunchDarkly.Observability
+{
+    public class ObservabilityPlugin : Plugin
+    {
+        private readonly ObservabilityPluginBuilder _config;
+        private readonly IServiceCollection _services;
+
+        /// <summary>
+        /// Create a new builder for <see cref="ObservabilityPlugin"/>.
+        /// <para>
+        /// When using this builder, LaunchDarkly client must be constructed before your application is built.
+        /// For example:
+        ///
+        /// <code>
+        /// TODO: Add example.
+        /// </code>
+        /// </para>
+        /// </summary>
+        /// <returns>A new <see cref="ObservabilityPluginBuilder"/> instance for configuring the observability plugin.</returns>
+        public static ObservabilityPluginBuilder Builder() =>
+            new ObservabilityPluginBuilder();
+
+        internal ObservabilityPlugin(ObservabilityPluginBuilder config) : base(
+            "LaunchDarkly.Observability")
+        {
+            _config = config;
+        }
+
+        internal ObservabilityPlugin() : base("LaunchDarkly.Observability")
+        {
+            _services = null;
+            _config = null;
+        }
+
+        /// <inheritdoc />
+        public override void Register(ILdClient client, EnvironmentMetadata metadata)
+        {
+            if (_services == null || _config == null) return;
+            var config = _config.BuildConfig(metadata.Credential);
+            OpenTelemetry.Register(config);
+        }
+
+        /// <inheritdoc />
+        public override IList<Hook> GetHooks(EnvironmentMetadata metadata)
+        {
+            return new List<Hook>
+            {
+                TracingHook.Builder().IncludeValue().Build()
+            };
+        }
+
+        /// <summary>
+        /// Used to build an instance of the Observability Plugin.
+        /// </summary>
+        public sealed class ObservabilityPluginBuilder : BaseBuilder<ObservabilityPluginBuilder>
+        {
+            /// <summary>
+            /// Build an <see cref="ObservabilityPlugin"/> instance with the configured settings.
+            /// </summary>
+            /// <returns>The constructed <see cref="ObservabilityPlugin"/>.</returns>
+            public ObservabilityPlugin Build()
+            {
+                return new ObservabilityPlugin(this);
+            }
+        }
+    }
+}

sdk/@launchdarkly/observability-dotnet/src/LaunchDarkly.Observability/Asp/Legacy/OpenTelemetryConfig.cs

@@ -0,0 +1,81 @@
+using LaunchDarkly.Logging;
+using LaunchDarkly.Observability.Otel;
+using Microsoft.Extensions.Logging;
+using OpenTelemetry;
+using OpenTelemetry.Logs;
+using OpenTelemetry.Metrics;
+using OpenTelemetry.Trace;
+
+// ReSharper disable once CheckNamespace
+namespace LaunchDarkly.Observability
+{
+    public static class OpenTelemetry
+    {
+        private static TracerProvider _tracerProvider;
+        private static MeterProvider _meterProvider;
+        private static readonly object ProviderLock = new object();
+
+        /// <summary>
+        /// Extension method which adds LaunchDarkly logging to a logging factory.
+        ///
+        /// <code>
+        /// using (var factory = LoggerFactory.Create(builder => { builder.AddLaunchDarklyLogging(config); })) {
+        ///   // Use factory to get logger which uses LaunchDarkly loging.
+        /// }
+        /// </code>
+        /// </summary>
+        /// <param name="loggingBuilder">the logging builder for the factory</param>
+        /// <param name="config">the LaunchDarkly observability configuration</param>
+        public static void AddLaunchDarklyLogging(this ILoggingBuilder loggingBuilder, ObservabilityConfig config)
+        {
+            loggingBuilder.AddOpenTelemetry(options =>
+            {
+                options.SetResourceBuilder(CommonOtelOptions.GetResourceBuilder(config))
+                    .AddProcessor(new SamplingLogProcessor(CommonOtelOptions.GetSampler(config)))
+                    .AddOtlpExporter(exportOptions => { exportOptions.WithCommonLaunchDarklyLoggingExport(config); });
+            });
+        }
+
+        public static void Register(ObservabilityConfig config, Logger debugLogger = null)
+        {
+            lock (ProviderLock)
+            {
+                // If the providers are set, then the implementation has already been configured.
+                if (_tracerProvider != null)
+                {
+                    return;
+                }
+
+                var resourceBuilder = CommonOtelOptions.GetResourceBuilder(config);
+                var sampler = CommonOtelOptions.GetSampler(config);
+
+                    _tracerProvider = global::OpenTelemetry.Sdk.CreateTracerProviderBuilder()
+                        .WithCommonLaunchDarklyConfig(config, resourceBuilder, sampler)
+                        .AddAspNetInstrumentation()
+                        .Build();
+
+                    _meterProvider = global::OpenTelemetry.Sdk.CreateMeterProviderBuilder()
+                        .WithCommonLaunchDarklyConfig(config, resourceBuilder)
+                        .AddAspNetInstrumentation()
+                        .Build();
+            }
+
+            using (var factory = LoggerFactory.Create(builder => { builder.AddLaunchDarklyLogging(config); }))
+            {
+                var logger = factory.CreateLogger<ObservabilityPlugin>();
+                Observe.Initialize(config, logger);
+            }
+        }
+
+        public static void Shutdown()
+        {
+            lock (ProviderLock)
+            {
+                _tracerProvider?.Dispose();
+                _meterProvider?.Dispose();
+                _tracerProvider = null;
+                _meterProvider = null;
+            }
+        }
+    }
+}

sdk/@launchdarkly/observability-dotnet/src/LaunchDarkly.Observability/BaseBuilder.cs

@@ -6,6 +6,12 @@
 
 namespace LaunchDarkly.Observability
 {
+    #if NETFRAMEWORK
+    using LoggerBuilderType = OpenTelemetryLoggerOptions;
+    #else
+    using LoggerBuilderType = LoggerProviderBuilder;
+    #endif
+
     /// <summary>
     /// Base builder which allows for methods to be shared between building a config directly and building a plugin.
     /// <remarks>
@@ -23,7 +29,7 @@ public class BaseBuilder<TBuilder> where TBuilder : BaseBuilder<TBuilder>
         private string _environment = string.Empty;
         private string _serviceVersion = string.Empty;
         private Action<TracerProviderBuilder> _extendedTracerConfiguration;
-        private Action<LoggerProviderBuilder> _extendedLoggerConfiguration;
+        private Action<LoggerBuilderType> _extendedLoggerConfiguration;
         private Action<MeterProviderBuilder> _extendedMeterConfiguration;
 
         protected BaseBuilder()
@@ -171,7 +177,7 @@ public TBuilder WithExtendedTracingConfig(Action<TracerProviderBuilder> extended
         /// </example>
         /// <param name="extendedLoggerConfiguration">A function used to extend the logging configuration.</param>
         /// <returns>A reference to this builder.</returns>
-        public TBuilder WithExtendedLoggerConfiguration(Action<LoggerProviderBuilder> extendedLoggerConfiguration)
+        public TBuilder WithExtendedLoggerConfiguration(Action<LoggerBuilderType> extendedLoggerConfiguration)
         {
             _extendedLoggerConfiguration = extendedLoggerConfiguration;
             return (TBuilder)this;