Implementing log for Azure

--HG--
branch : 1.x

src/Orchard.Azure/Logging/AzureAppender.cs

@@ -0,0 +1,40 @@
+using System;
+using Microsoft.WindowsAzure;
+using Microsoft.WindowsAzure.Diagnostics.Management;
+using Microsoft.WindowsAzure.ServiceRuntime;
+using log4net.Appender;
+using log4net.Core;
+
+namespace Orchard.Azure.Logging {
+
+    /// <summary>
+    /// Azure specific implementation of a log4net appender.
+    /// Uses DataConnectionString to define the location of the log.
+    /// </summary>
+    public class AzureAppender : AppenderSkeleton {
+        private const string WadConnectionString = "Microsoft.WindowsAzure.Plugins.Diagnostics.ConnectionString";
+        
+        public AzureAppender() {
+            
+            var cloudStorageAccount = CloudStorageAccount.Parse(RoleEnvironment.GetConfigurationSettingValue(WadConnectionString));
+
+            var roleInstanceDiagnosticManager = cloudStorageAccount.CreateRoleInstanceDiagnosticManager(
+                RoleEnvironment.DeploymentId,
+                RoleEnvironment.CurrentRoleInstance.Role.Name,
+                RoleEnvironment.CurrentRoleInstance.Id);
+    
+            var diagnosticMonitorConfiguration = roleInstanceDiagnosticManager.GetCurrentConfiguration();
+            diagnosticMonitorConfiguration.Directories.ScheduledTransferPeriod = TimeSpan.FromMinutes(1d);
+            diagnosticMonitorConfiguration.Logs.ScheduledTransferPeriod = TimeSpan.FromMinutes(1d);
+
+            roleInstanceDiagnosticManager.SetCurrentConfiguration(diagnosticMonitorConfiguration);
+        } 
+
+        protected override void Append(LoggingEvent loggingEvent) {
+            var formattedLog = RenderLoggingEvent(loggingEvent);
+            
+            // this is the way to logging into Azure
+            System.Diagnostics.Trace.WriteLine(formattedLog);
+        }
+    }
+}

src/Orchard.Azure/Orchard.Azure.CloudService/ServiceConfiguration.cscfg

@@ -4,6 +4,7 @@
     <Instances count="1" />
     <ConfigurationSettings>
       <Setting name="DataConnectionString" value="UseDevelopmentStorage=true" />
+      <Setting name="Microsoft.WindowsAzure.Plugins.Diagnostics.ConnectionString" value="UseDevelopmentStorage=true" />
     </ConfigurationSettings>
   </Role>
 </ServiceConfiguration>

src/Orchard.Azure/Orchard.Azure.CloudService/ServiceDefinition.csdef

@@ -8,6 +8,9 @@
         </Bindings>
       </Site>
     </Sites>
+    <Imports>
+      <Import moduleName="Diagnostics" />
+    </Imports>
     <ConfigurationSettings>
       <Setting name="DataConnectionString" />
     </ConfigurationSettings>

src/Orchard.Azure/Orchard.Azure.Web/Config/log4net.config

@@ -3,26 +3,25 @@
   <root>
     <!-- Value of priority may be ALL, DEBUG, INFO, WARN, ERROR, FATAL, OFF -->
     <priority value="WARN" />
-    <appender-ref ref="RollingLogFileAppender" />
+    <appender-ref ref="AzureAppender" />
   </root>
 
+  <!--
   <logger name="Orchard.Localization">
     <priority value="WARN" />
     <appender-ref ref="RollingLogFileAppender" />
   </logger>
+  -->
 
-  <logger name="Orchard.Data.SessionLocator">
+  <appender name="AzureAppender" type="Orchard.Logging.AzureAppender">
-    <priority value="INFO" />
-    <appender-ref ref="RollingLogFileAppender" />
-  </logger>
-
-  <appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
-    <file value="App_Data/Logs/orchard-debug.txt" />
-    <appendToFile value="true" />
-    <immediateFlush value="true" />
 
+    <filter type="log4net.Filter.LevelRangeFilter">
+      <!-- only error and fatal messages end up in this target, even if child loggers accept lower priority -->
+      <levelMin value="ERROR" />
+    </filter>
+    
     <layout type="log4net.Layout.PatternLayout">
-      <conversionPattern value="%logger - %message%newline" />
+      <conversionPattern value="%date [%thread] %logger - %message%newline" />
     </layout>
   </appender>
 </log4net>

src/Orchard.Azure/Orchard.Azure.Web/Web.config

@@ -36,6 +36,20 @@
       </namespaces>
     </pages>
   </system.web.webPages.razor>
+
+  <system.diagnostics>
+    <trace>
+      <listeners>
+        <add type="Microsoft.WindowsAzure.Diagnostics.DiagnosticMonitorTraceListener, 
+            Microsoft.WindowsAzure.Diagnostics, 
+            Version=1.0.0.0, 
+            Culture=neutral, 
+            PublicKeyToken=31bf3856ad364e35"
+           name="AzureDiagnostics">
+        </add>
+      </listeners>
+    </trace>
+  </system.diagnostics>
   
   <!-- 
         Set default transaction timeout to 30 minutes so that interactive debugging 

src/Orchard.Azure/Orchard.Azure.csproj

@@ -53,6 +53,11 @@
     <CodeAnalysisRuleSet>AllRules.ruleset</CodeAnalysisRuleSet>
   </PropertyGroup>
   <ItemGroup>
+    <Reference Include="log4net">
+      <HintPath>..\..\lib\fluentnhibernate\log4net.dll</HintPath>
+      <Private>True</Private>
+    </Reference>
+    <Reference Include="Microsoft.WindowsAzure.Diagnostics, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL" />
     <Reference Include="Microsoft.WindowsAzure.ServiceRuntime, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL" />
     <Reference Include="Microsoft.WindowsAzure.StorageClient, Version=1.1.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
       <Private>True</Private>
@@ -76,6 +81,7 @@
     <Compile Include="HttpContextWeaver.cs" />
     <Compile Include="Environment\Configuration\AzureShellSettingsManager.cs" />
     <Compile Include="FileSystems\Media\AzureBlobStorageProvider.cs" />
+    <Compile Include="Logging\AzureAppender.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="AzureFileSystem.cs" />
   </ItemGroup>
@@ -103,6 +109,7 @@
       <Install>true</Install>
     </BootstrapperPackage>
   </ItemGroup>
+  <ItemGroup />
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.