2013-02-20 80 views
2

我正在開發一個應用程序,我不時有一個錯誤,我不得不同步幾個工人角色與blob租約。CloubBlockBlob AcquireLease提供兩個租賃給兩個工作者角色

下面是輔助角色我的初始化代碼

CloudStorageAccount storageAccount = CloudStorageAccount.Parse(RoleEnvironment.GetConfigurationSettingValue("StorageAccount")); 
string blobContainerName = RoleEnvironment.GetConfigurationSettingValue("BlobContainer"); 
CloudBlobContainer blobContainer = storageAccount.CreateCloudBlobClient().GetContainerReference(blobContainerName); 
blobContainer.CreateIfNotExists(); 
string blobName = RoleEnvironment.GetConfigurationSettingValue("BlobToBeLeased"); 
_blob = blobContainer.GetBlockBlobReference(blobName); 

if (!_blob.Exists()) 
{ 
    using (var ms = new MemoryStream(Encoding.UTF8.GetBytes("This is dummy data"))) 
    { 
     try 
     { 
      _blob.UploadFromStream(ms); 
     } 
     catch (StorageException storageException) 
     { 
      if (storageException.RequestInformation.HttpStatusCode != 412) 
       throw; 
     } 
    } 
} 

這裏是我的AcquireLease方法:

private void AcquireLease() 
{ 
    try 
    { 
     var leaseId = _blob.AcquireLease(null, null); 
     Trace.WriteLine("==========> Lease acquired! <========== ID => " + leaseId); 
     _accessCondition = new AccessCondition {LeaseId = leaseId}; 
    } 
    catch (Exception) 
    { 
     Trace.WriteLine("==========> Lease rejected! <=========="); 
    } 
} 

問題的截圖: enter image description here

的問題是什麼時候調用AcquireLease方法,它有時會給我兩個租約...任何人都有一個想法如何解決這個...

CloudBlockBlob操作是否爲原子?

回答

2

在與微軟的一個人談話後,似乎模擬器確實與存儲服務本身有一些差異。

在Azure上運行相同的代碼正常工作!

此答案適用於仿真器v1.8.0.0。

+1

這是不對的... – 2016-03-06 04:25:19