Fixed an empty blog 'log.{date}' creating.

Author: ob1dev

src/Sitecore.Azure.Diagnostics/Appenders/AzureBlobStorageAppender.cs

@@ -1,5 +1,6 @@
 using log4net.Appender;
 using log4net.spi;
+using Microsoft.WindowsAzure.Storage;
 using Microsoft.WindowsAzure.Storage.Blob;
 using Sitecore.Azure.Diagnostics.Storage;
 using System;
@@ -100,8 +101,14 @@ protected override void Append(LoggingEvent loggingEvent)
       Sitecore.Diagnostics.Assert.ArgumentNotNull(loggingEvent, "loggingEvent");
 
       var blob = this.Blob as CloudAppendBlob;
-      string message = this.RenderLoggingEvent(loggingEvent);
 
+      if (!blob.Exists())
+      {
+        // Create an empty append blob or throw an exception if the blob exists.
+        blob.CreateOrReplace(AccessCondition.GenerateIfNotExistsCondition());
+      }
+
+      string message = this.RenderLoggingEvent(loggingEvent);
       blob.AppendText(message);
     }    
 

src/Sitecore.Azure.Diagnostics/Storage/AzureBlobStorageProvider.cs

@@ -258,11 +258,11 @@ public virtual ICloudBlob CreateBlob(string blobName)
         this.CloudBlobContainer.GetAppendBlobReference(blobName) :
         this.GetContainer(this.ContainerName).GetAppendBlobReference(blobName);
 
-      if (!blob.Exists())
-      {
-        // Create an empty append blob or throw an exception if the blob exists.
-        blob.CreateOrReplace(AccessCondition.GenerateIfNotExistsCondition());
-      }
+      //if (!blob.Exists())
+      //{
+      //  // Create an empty append blob or throw an exception if the blob exists.
+      //  blob.CreateOrReplace(AccessCondition.GenerateIfNotExistsCondition());
+      //}
 
       return blob;
     }