From af38d26fe74a0a04b3e38934a2118296b03e0f0b Mon Sep 17 00:00:00 2001
From: Chris Ross <Tratcher@Outlook.com>
Date: Tue, 6 May 2014 14:57:48 -0700
Subject: [PATCH] Provide empty logger factory service.

---
 .../HostingServices.cs                        | 23 +++++++++++++++++++
 src/Microsoft.AspNet.Hosting/project.json     |  1 +
 2 files changed, 24 insertions(+)

diff --git a/src/Microsoft.AspNet.Hosting/HostingServices.cs b/src/Microsoft.AspNet.Hosting/HostingServices.cs
index 2ce566dbeb..c7376cd52e 100644
--- a/src/Microsoft.AspNet.Hosting/HostingServices.cs
+++ b/src/Microsoft.AspNet.Hosting/HostingServices.cs
@@ -15,6 +15,7 @@
 // See the Apache 2 License for the specific language governing
 // permissions and limitations under the License.
 
+using System;
 using System.Collections.Generic;
 using Microsoft.AspNet.Hosting.Builder;
 using Microsoft.AspNet.Hosting.Server;
@@ -22,6 +23,7 @@ using Microsoft.AspNet.Hosting.Startup;
 using Microsoft.AspNet.Security.DataProtection;
 using Microsoft.Framework.ConfigurationModel;
 using Microsoft.Framework.DependencyInjection;
+using Microsoft.Framework.Logging;
 
 namespace Microsoft.AspNet.Hosting
 {
@@ -47,6 +49,9 @@ namespace Microsoft.AspNet.Hosting
 
             yield return describer.Transient<ITypeActivator, TypeActivator>();
 
+            // TODO: We expect this to be provide by the runtime eventually.
+            yield return describer.Instance<ILoggerFactory>(new NullLoggerFactory());
+
             yield return new ServiceDescriptor
             {
                 ServiceType = typeof(IContextAccessor<>),
@@ -69,5 +74,23 @@ namespace Microsoft.AspNet.Hosting
                 yield return describer.Instance<IDataProtectionProvider>(DataProtectionProvider.CreateFromDpapi());
             }
         }
+
+        // TODO: Temp workaround until the runtime reliably provides logging.
+        // If ILoggerFactory is never guaranteed, move this fallback into Microsoft.AspNet.Logging.
+        private class NullLoggerFactory : ILoggerFactory
+        {
+            public ILogger Create(string name)
+            {
+                return new NullLogger();
+            }
+        }
+
+        private class NullLogger : ILogger
+        {
+            public bool WriteCore(TraceType eventType, int eventId, object state, Exception exception, Func<object, Exception, string> formatter)
+            {
+                return false;
+            }
+        }
     }
 }
\ No newline at end of file
diff --git a/src/Microsoft.AspNet.Hosting/project.json b/src/Microsoft.AspNet.Hosting/project.json
index 70308d391e..bc7d383d2d 100644
--- a/src/Microsoft.AspNet.Hosting/project.json
+++ b/src/Microsoft.AspNet.Hosting/project.json
@@ -7,6 +7,7 @@
     "Microsoft.AspNet.Security.DataProtection": "0.1-alpha-*",
     "Microsoft.Framework.ConfigurationModel": "0.1-alpha-*",
     "Microsoft.Framework.DependencyInjection": "0.1-alpha-*",
+    "Microsoft.Framework.Logging": "0.1-alpha-*",
     "Microsoft.Net.Runtime.Interfaces":  "0.1-alpha-*"
   },
   "configurations": {