Trimming and AOT compatibility

projects/RabbitMQ.Client/RabbitMQ.Client.csproj

@@ -4,6 +4,7 @@
     <TargetFrameworks>net6.0;netstandard2.0</TargetFrameworks>
     <NoWarn>$(NoWarn);CS1591</NoWarn>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+    <EnableTrimAnalyzer>true</EnableTrimAnalyzer>
     <AssemblyTitle>RabbitMQ Client Library for .NET</AssemblyTitle>
     <Authors>VMware</Authors>
     <Company>VMware, Inc. or its affiliates.</Company>

projects/RabbitMQ.Client/client/api/ICredentialsRefresher.cs

@@ -31,6 +31,7 @@
 
 using System;
 using System.Collections.Concurrent;
+using System.Diagnostics.CodeAnalysis;
 using System.Diagnostics.Tracing;
 namespace RabbitMQ.Client
 {
@@ -39,7 +40,7 @@ public interface ICredentialsRefresher
         ICredentialsProvider Register(ICredentialsProvider provider, NotifyCredentialRefreshed callback);
         bool Unregister(ICredentialsProvider provider);
 
-        delegate void NotifyCredentialRefreshed(bool succesfully);
+        delegate void NotifyCredentialRefreshed(bool successfully);
     }
 
     [EventSource(Name = "TimerBasedCredentialRefresher")]
@@ -52,10 +53,16 @@ public class TimerBasedCredentialRefresherEventSource : EventSource
         [Event(2)]
         public void Unregistered(string name) => WriteEvent(2, "UnRegistered", name);
         [Event(3)]
+#if NET6_0_OR_GREATER
+        [UnconditionalSuppressMessage("ReflectionAnalysis", "IL2026:RequiresUnreferencedCode", Justification = "Parameters to this method are primitive and are trimmer safe")]
+#endif
         public void ScheduledTimer(string name, double interval) => WriteEvent(3, "ScheduledTimer", name, interval);
         [Event(4)]
         public void TriggeredTimer(string name) => WriteEvent(4, "TriggeredTimer", name);
         [Event(5)]
+#if NET6_0_OR_GREATER
+        [UnconditionalSuppressMessage("ReflectionAnalysis", "IL2026:RequiresUnreferencedCode", Justification = "Parameters to this method are primitive and are trimmer safe")]
+#endif
         public void RefreshedCredentials(string name, bool succesfully) => WriteEvent(5, "RefreshedCredentials", name, succesfully);
         [Event(6)]
         public void AlreadyRegistered(string name) => WriteEvent(6, "AlreadyRegistered", name);

projects/RabbitMQ.Client/client/logging/RabbitMqClientEventSource.cs

@@ -30,6 +30,7 @@
 //---------------------------------------------------------------------------
 
 using System;
+using System.Diagnostics.CodeAnalysis;
 using System.Diagnostics.Tracing;
 
 namespace RabbitMQ.Client.Logging
@@ -62,31 +63,30 @@ public void Warn(string message)
             if (IsEnabled())
                 WriteEvent(2, message);
         }
-#if NET452
-        [Event(3, Message = "ERROR", Keywords = Keywords.Log, Level = EventLevel.Error)]
-        public void Error(string message, string detail)
-        {
-            if(IsEnabled())
-                this.WriteEvent(3, message, detail);
-        }
-#else
+
         [Event(3, Message = "ERROR", Keywords = Keywords.Log, Level = EventLevel.Error)]
         public void Error(string message, RabbitMqExceptionDetail ex)
         {
             if (IsEnabled())
+            {
+#if NET6_0_OR_GREATER
+                WriteExceptionEvent(message, ex);
+
+                [UnconditionalSuppressMessage("Trimming", "IL2026", Justification = "The properties are preserved with the DynamicallyAccessedMembers attribute.")]
+                void WriteExceptionEvent<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicProperties)] T>(string message, T ex)
+                {
+                    WriteEvent(3, message, ex);
+                }
+#else
                 WriteEvent(3, message, ex);
-        }
 #endif
+            }
+        }
 
         [NonEvent]
         public void Error(string message, Exception ex)
         {
-
-#if NET452
-            Error(message, ex.ToString());
-#else
             Error(message, new RabbitMqExceptionDetail(ex));
-#endif
         }
     }
 }

projects/RabbitMQ.Client/client/logging/RabbitMqExceptionDetail.cs

@@ -60,6 +60,10 @@ public RabbitMqExceptionDetail(IDictionary<string, object> ex)
             }
         }
 
+        // NOTE: This type is used to write EventData in RabbitMqClientEventSource.Error. To make it trim-compatible, these properties are preserved
+        // in RabbitMqClientEventSource. If RabbitMqExceptionDetail gets a property that is a complex type, we need to ensure the nested properties are
+        // preserved as well.
+
         public string Type { get; }
         public string Message { get; }
         public string StackTrace { get; }