Synthetic Source internal, dependency operation name, enhance event message

BASE/src/Microsoft.ApplicationInsights/Extensibility/Implementation/OperationContext.cs

@@ -29,7 +29,7 @@ public string Name
         /// <summary>
         /// Gets or sets the application-defined operation SyntheticSource.
         /// </summary>
-        public string SyntheticSource
+        internal string SyntheticSource
         {
             get { return string.IsNullOrEmpty(this.syntheticSource) ? null : this.syntheticSource; }
             set { this.syntheticSource = value; }

BASE/src/Microsoft.ApplicationInsights/TelemetryClient.cs

@@ -473,7 +473,7 @@
             this.Configuration.FeatureReporter.MarkFeatureInUse(StatsbeatFeatures.TrackException);
             if (exception == null)
             {
                 exception = new Exception(Utils.PopulateRequiredStringValue(null, "message", typeof(ExceptionTelemetry).FullName));
             }
 
             var state = new DictionaryLogState(this.Context, properties, exception.Message);
@@ -493,7 +493,7 @@
             // TODO investigate how problem id, custom message, etc should appear in portal
             if (telemetry == null)
             {
                 var exception = new Exception(Utils.PopulateRequiredStringValue(null, "message", typeof(ExceptionTelemetry).FullName));
                 telemetry = new ExceptionTelemetry(exception);
             }
 
@@ -645,6 +645,11 @@
                         dependencyTelemetryActivity.SetTag(SemanticConventions.AttributeMicrosoftDependencyResultCode, telemetry.ResultCode);
                     }
 
+                    if (!string.IsNullOrEmpty(telemetry.Context?.Operation?.Name))
+                    {
+                        dependencyTelemetryActivity.SetTag(SemanticConventions.AttributeMicrosoftOperationName, telemetry.Context.Operation.Name);
+                    }
+
                     // Add GlobalProperties first (lower priority)
                     if (this.Context?.GlobalPropertiesValue != null)
                     {
@@ -1252,7 +1257,7 @@
             else
             {
                 // Fallback: create a generic exception with the message
                 rootException = new Exception(telemetry.Message ?? "<no message>");
             }
 
             // Enrich the exception with metadata
@@ -1270,7 +1275,7 @@
         {
             if (exceptionDetailsList == null || exceptionDetailsList.Count == 0)
             {
                 return new Exception("<no exception details>");
             }
 
             // Process from innermost (index 0) to outermost (last index)
@@ -1289,11 +1294,11 @@
 
                 if (innerException != null)
                 {
                     currentException = new Exception($"[{typeName}] {message}", innerException);
                 }
                 else
                 {
                     currentException = new Exception($"[{typeName}] {message}");
                 }
 
                 // Set the current exception as the inner for the next iteration

NETCORE/src/Microsoft.ApplicationInsights.AspNetCore/Extensibility/Implementation/Tracing/AspNetCoreEventSource.cs

@@ -31,18 +31,57 @@ private AspNetCoreEventSource()
         }
 
         /// <summary>
-        /// Logs an event for when generic error occur within the SDK.
+        /// Logs an event for when adding Application Insights telemetry fails.
         /// </summary>
         [Event(
             1,
             Keywords = Keywords.Diagnostics,
-            Message = "An error has occurred which may prevent application insights from functioning. Error message: '{0}' ",
+            Message = "Failed to add Application Insights telemetry. Error: '{0}'",
             Level = EventLevel.Error)]
-        public void LogError(string errorMessage, string appDomainName = "Incorrect")
+        public void FailedToAddTelemetry(string errorMessage, string appDomainName = "Incorrect")
         {
             this.WriteEvent(1, errorMessage, this.applicationNameProvider.Name);
         }
 
+        /// <summary>
+        /// Logs an event for when an invalid TracesPerSecond value is configured.
+        /// </summary>
+        [Event(
+            2,
+            Keywords = Keywords.Diagnostics,
+            Message = "Invalid TracesPerSecond value '{0}'. Value must be at least 0. Using default value.",
+            Level = EventLevel.Warning)]
+        public void InvalidTracesPerSecondConfigured(double tracesPerSecond, string appDomainName = "Incorrect")
+        {
+            this.WriteEvent(2, tracesPerSecond, this.applicationNameProvider.Name);
+        }
+
+        /// <summary>
+        /// Logs an event for when an invalid SamplingRatio value is configured.
+        /// </summary>
+        [Event(
+            3,
+            Keywords = Keywords.Diagnostics,
+            Message = "Invalid SamplingRatio value '{0}'. Value must be between 0.0 and 1.0. Using default value.",
+            Level = EventLevel.Warning)]
+        public void InvalidSamplingRatioConfigured(float samplingRatio, string appDomainName = "Incorrect")
+        {
+            this.WriteEvent(3, samplingRatio, this.applicationNameProvider.Name);
+        }
+
+        /// <summary>
+        /// Logs an event for when telemetry configuration fails.
+        /// </summary>
+        [Event(
+            4,
+            Keywords = Keywords.Diagnostics,
+            Message = "Failed to configure telemetry. Error: '{0}'",
+            Level = EventLevel.Error)]
+        public void TelemetryConfigurationFailure(string errorMessage, string appDomainName = "Incorrect")
+        {
+            this.WriteEvent(4, errorMessage, this.applicationNameProvider.Name);
+        }
+
         /// <summary>
         /// Keywords for the AspNetEventSource.
         /// </summary>

NETCORE/src/Microsoft.ApplicationInsights.AspNetCore/Extensions/ApplicationInsightsExtensions.cs

@@ -105,7 +105,7 @@ public static IServiceCollection AddApplicationInsightsTelemetry(this IServiceCo
             }
             catch (Exception e)
             {
-                AspNetCoreEventSource.Instance.LogError(e.ToInvariantString());
+                AspNetCoreEventSource.Instance.FailedToAddTelemetry(e.ToInvariantString());
                 return services;
             }
         }
@@ -228,7 +228,7 @@ internal static IOpenTelemetryBuilder UseApplicationInsightsTelemetry(this IOpen
                         }
                         else 
                         {
-                            AspNetCoreEventSource.Instance.LogError($"Invalid TracesPerSecond value '{serviceOptions.TracesPerSecond.Value}'. Value must be at least 0. Using default value.");     
+                            AspNetCoreEventSource.Instance.InvalidTracesPerSecondConfigured(serviceOptions.TracesPerSecond.Value);
                         }
                     }
 
@@ -244,7 +244,7 @@ internal static IOpenTelemetryBuilder UseApplicationInsightsTelemetry(this IOpen
                         }
                         else
                         {
-                            AspNetCoreEventSource.Instance.LogError($"Invalid SamplingRatio value '{serviceOptions.SamplingRatio.Value}'. Value must be between 0.0 and 1.0. Using default value.");
+                            AspNetCoreEventSource.Instance.InvalidSamplingRatioConfigured(serviceOptions.SamplingRatio.Value);
                         }
                     }
 

NETCORE/src/Microsoft.ApplicationInsights.WorkerService/ApplicationInsightsExtensions.cs

@@ -102,7 +102,7 @@ public static IServiceCollection AddApplicationInsightsTelemetryWorkerService(th
             }
             catch (Exception e)
             {
-                WorkerServiceEventSource.Instance.LogError(e.ToInvariantString());
+                WorkerServiceEventSource.Instance.FailedToAddTelemetry(e.ToInvariantString());
                 return services;
             }
         }
@@ -216,7 +216,7 @@ internal static IOpenTelemetryBuilder UseApplicationInsightsTelemetry(this IOpen
                         }
                         else 
                         {
-                            WorkerServiceEventSource.Instance.LogError($"Invalid TracesPerSecond value '{serviceOptions.TracesPerSecond.Value}'. Value must be at least 0. Using default value.");     
+                            WorkerServiceEventSource.Instance.InvalidTracesPerSecondConfigured(serviceOptions.TracesPerSecond.Value);
                         }    
                     }
 
@@ -232,7 +232,7 @@ internal static IOpenTelemetryBuilder UseApplicationInsightsTelemetry(this IOpen
                         }
                         else
                         {
-                            WorkerServiceEventSource.Instance.LogError($"Invalid SamplingRatio value '{serviceOptions.SamplingRatio.Value}'. Value must be between 0.0 and 1.0. Using default value.");
+                            WorkerServiceEventSource.Instance.InvalidSamplingRatioConfigured(serviceOptions.SamplingRatio.Value);
                         }
                     }
 

NETCORE/src/Microsoft.ApplicationInsights.WorkerService/Implementation/Tracing/WorkerServiceEventSource.cs

@@ -29,14 +29,57 @@ private WorkerServiceEventSource()
         }
 
         /// <summary>
-        /// Logs error message.
+        /// Logs an event for when adding Application Insights telemetry fails.
         /// </summary>
-        /// <param name="message">Message.</param>
+        /// <param name="errorMessage">Error message.</param>
         /// <param name="appDomainName">An ignored placeholder to make EventSource happy.</param>
-        [Event(1, Message = "An error has occurred which may prevent application insights from functioning. Error message: '{0}'", Level = EventLevel.Error)]
-        public void LogError(string message, string appDomainName = "Incorrect")
+        [Event(
+            1,
+            Keywords = Keywords.Diagnostics,
+            Message = "Failed to add Application Insights telemetry. Error: '{0}'",
+            Level = EventLevel.Error)]
+        public void FailedToAddTelemetry(string errorMessage, string appDomainName = "Incorrect")
         {
-            this.WriteEvent(1, message, this.applicationNameProvider.Name);
+            this.WriteEvent(1, errorMessage, this.applicationNameProvider.Name);
+        }
+
+        /// <summary>
+        /// Logs an event for when an invalid TracesPerSecond value is configured.
+        /// </summary>
+        [Event(
+            2,
+            Keywords = Keywords.Diagnostics,
+            Message = "Invalid TracesPerSecond value '{0}'. Value must be at least 0. Using default value.",
+            Level = EventLevel.Warning)]
+        public void InvalidTracesPerSecondConfigured(double tracesPerSecond, string appDomainName = "Incorrect")
+        {
+            this.WriteEvent(2, tracesPerSecond, this.applicationNameProvider.Name);
+        }
+
+        /// <summary>
+        /// Logs an event for when an invalid SamplingRatio value is configured.
+        /// </summary>
+        [Event(
+            3,
+            Keywords = Keywords.Diagnostics,
+            Message = "Invalid SamplingRatio value '{0}'. Value must be between 0.0 and 1.0. Using default value.",
+            Level = EventLevel.Warning)]
+        public void InvalidSamplingRatioConfigured(float samplingRatio, string appDomainName = "Incorrect")
+        {
+            this.WriteEvent(3, samplingRatio, this.applicationNameProvider.Name);
+        }
+
+        /// <summary>
+        /// Logs an event for when telemetry configuration fails.
+        /// </summary>
+        [Event(
+            4,
+            Keywords = Keywords.Diagnostics,
+            Message = "Failed to configure telemetry. Error: '{0}'",
+            Level = EventLevel.Error)]
+        public void TelemetryConfigurationFailure(string errorMessage, string appDomainName = "Incorrect")
+        {
+            this.WriteEvent(4, errorMessage, this.applicationNameProvider.Name);
         }
 
         /// <summary>

NETCORE/src/Shared/Extensions/ApplicationInsightsExtensions.cs

@@ -63,9 +63,9 @@ internal static void AddTelemetryConfiguration(
             catch (Exception ex)
             {
 #if AI_ASPNETCORE_WEB
-                AspNetCoreEventSource.Instance.LogError(ex.ToInvariantString());
+                AspNetCoreEventSource.Instance.TelemetryConfigurationFailure(ex.ToInvariantString());
 #else
-                WorkerServiceEventSource.Instance.LogError(ex.ToInvariantString());
+                WorkerServiceEventSource.Instance.TelemetryConfigurationFailure(ex.ToInvariantString());
 #endif
             }
         }