Added "command in error" classifier

Author: Duncan-at-Hedgefacts

examples/bank-account/RetailBank.AzureFunctionApp/Transfer/Functions/TransferCommands.cs

@@ -7,7 +7,9 @@ namespace RetailBank.AzureFunctionApp.Transfer.Functions
     public class TransferCommands
     {
 
+        //Transfer money
 
+        //Cancel in-progress transfer
 
     }
 }

src/EventSourcingOnAzureFunctions.Common/CQRS/CommandHandler/Classifications/Completed.cs

@@ -11,15 +11,19 @@ namespace EventSourcingOnAzureFunctions.Common.CQRS.CommandHandler.Classificatio
     /// A classification to denote that a command execution has completed
     /// </summary>
     [ClassificationName("Command Completed") ]
-    public class Completed
+    public sealed class Completed
         : ClassificationBase,
         IClassifyEventType<Completed>
     {
 
 
         public ClassificationResponse.ClassificationResults ClassifyEventInstance(Completed eventInstance)
         {
-            return ClassificationResponse.ClassificationResults.Include;
+            if (eventInstance != null)
+            {
+                return ClassificationResponse.ClassificationResults.Include;
+            }
+            return ClassificationResponse.ClassificationResults.Unchanged;
         }
 
         public override void SetParameter(string parameterName, object parameterValue)

src/EventSourcingOnAzureFunctions.Common/CQRS/CommandHandler/Classifications/InError.cs

@@ -0,0 +1,32 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using EventSourcingOnAzureFunctions.Common.CQRS.CommandHandler.Events;
+using EventSourcingOnAzureFunctions.Common.EventSourcing;
+using EventSourcingOnAzureFunctions.Common.EventSourcing.Interfaces;
+
+namespace EventSourcingOnAzureFunctions.Common.CQRS.CommandHandler.Classifications
+{
+    /// <summary>
+    /// A classification to denote that a command execution has had a fatal error
+    /// </summary>
+    [ClassificationName("Command In Error")]
+    public sealed class InError
+        : ClassificationBase,
+        IClassifyEventType<FatalErrorOccured>
+    {
+        public ClassificationResponse.ClassificationResults ClassifyEventInstance(FatalErrorOccured eventInstance)
+        {
+            if (eventInstance != null)
+            {
+                return ClassificationResponse.ClassificationResults.Include;
+            }
+            return ClassificationResponse.ClassificationResults.Unchanged;
+        }
+
+        public override void SetParameter(string parameterName, object parameterValue)
+        {
+            // This classifier has no parameters
+        }
+    }
+}