Adding a Message property to ILoggerStructure

Author: sonjakhan

src/Microsoft.Framework.Logging.Console/ConsoleLogger.cs

@@ -31,12 +31,13 @@ public void Write(LogLevel logLevel, int eventId, object state, Exception except
                 return;
             }
             var message = string.Empty;
-            if (state is ILoggerStructure)
+            var structure = state as ILoggerStructure;
+            if (structure != null)
             {
                 var builder = new StringBuilder();
                 FormatLoggerStructure(
                     builder,
-                    (ILoggerStructure)state,
+                    structure,
                     level: 1,
                     bullet: false);
                 message = Convert.ToString(builder.ToString(), CultureInfo.InvariantCulture);
@@ -115,6 +116,10 @@ public IDisposable BeginScope(object state)
 
         private void FormatLoggerStructure(StringBuilder builder, ILoggerStructure structure, int level, bool bullet)
         {
+            if (structure.Message != null)
+            {
+                builder.Append(structure.Message);
+            }
             var values = structure.GetValues();
             if (values == null)
             {

src/Microsoft.Framework.Logging.Interfaces/ILoggerStructure.cs

@@ -1,5 +1,4 @@
-using System;
-using System.Collections.Generic;
+using System.Collections.Generic;
 
 namespace Microsoft.Framework.Logging
 {
@@ -8,6 +7,14 @@ namespace Microsoft.Framework.Logging
 #endif
     public interface ILoggerStructure
     {
+        /// <summary>
+        /// A brief message to give context for the structure being logged
+        /// </summary>
+        string Message { get; }
+
+        /// <summary>
+        /// Returns an enumerable of key value pairs mapping the name of the structured data to the data.
+        /// </summary>
         IEnumerable<KeyValuePair<string, object>> GetValues();
 
         /// <summary>

src/Microsoft.Framework.Logging/LoggerStructureBase.cs

@@ -5,6 +5,8 @@ namespace Microsoft.Framework.Logging
 {
     public abstract class LoggerStructureBase : ILoggerStructure
     {
+        public string Message { get; set; }
+
         public virtual IEnumerable<KeyValuePair<string, object>> GetValues()
         {
             var values = new List<KeyValuePair<string, object>>();