Durable Activity 函数可以使用绑定属性吗？

Question

看来我无法使用使用 Blob 绑定的 activity 函数。以下给出了运行时错误：

[StorageAccount("AzureWebJobsStorage")]
[FunctionName("LoadBlobFromBlobStorage")]
public static async Task<string> Run([ActivityTrigger] string blobName,
[Blob("containerName/directoryName/{blobName}", FileAccess.ReadWrite, Connection = AzureWebJobsStorage")] CloudBlockBlob blob,
ILogger log)
{
    ...
}

我收到多条绑定失败的错误消息。 Durable Functions 不解析绑定吗？

编辑：添加错误消息（减少冗长...）：

Azure Functions Core Tools (2.4.379 Commit hash: ab2c4db3b43f9662b82494800dd770698788bf2d)
Function Runtime Version: 2.0.12285.0
2019-02-21T18:25:32.165 [Error] Error indexing method 'LoadBlobFromBlobStorage'
Microsoft.Azure.WebJobs.Host.Indexers.FunctionIndexingException : Error indexing method 'LoadBlobFromBlobStorage' ---> System.InvalidOperationException : Can't bind Blob to type 'Microsoft.WindowsAzure.Storage.Blob.CloudBlockBlob'.
Possible causes:
1) Tried binding to 'Microsoft.WindowsAzure.Storage.Blob.CloudBlobDirectory...' but user type assembly was 'Microsoft.WindowsAzure.Storage.Blob.CloudBlobDirectory... .
2) Tried binding to 'Microsoft.WindowsAzure.Storage.Blob.CloudBlobContainer...' but user type assembly was 'Microsoft.WindowsAzure.Storage.Blob.CloudBlobDirectory... .
3) Tried binding to 'Microsoft.Azure.WebJobs.Host.Blobs.Bindings.BlobsExtensionConfigProvider+MultiBlobContext, Microsoft.Azure.WebJobs.Extensions.Storage, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' but user type assembly was 'Microsoft.WindowsAzure.Storage.Blob.CloudBlobDirectory... .
4) Tried binding to 'System.IO.Stream, System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e' but user type assembly was 'Microsoft.WindowsAzure.Storage.Blob.CloudBlobDirectory... .
5) Tried binding to 'Microsoft.WindowsAzure.Storage.Blob.CloudBlockBlob...' but user type assembly was 'Microsoft.WindowsAzure.Storage.Blob.CloudBlobDirectory... .
6) Tried binding to 'Microsoft.WindowsAzure.Storage.Blob.CloudPageBlob...' but user type assembly was 'Microsoft.WindowsAzure.Storage.Blob.CloudBlobDirectory... .
7) Tried binding to 'Microsoft.WindowsAzure.Storage.Blob.CloudAppendBlob...' but user type assembly was 'Microsoft.WindowsAzure.Storage.Blob.CloudBlobDirectory... .
8) Tried binding to 'Microsoft.WindowsAzure.Storage.Blob.ICloudBlob...' but user type assembly was 'Microsoft.WindowsAzure.Storage.Blob.CloudBlobDirectory... .

   at async Microsoft.Azure.WebJobs.Host.Bindings.GenericCompositeBindingProvider`1.TryCreateAsync[TAttribute](BindingProviderContext context) at C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Bindings\BindingProviders\GenericCompositeBindingProvider.cs : 89
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

Answer 1

确保安装了所需的软件包，例如

<PackageReference Include="Microsoft.Azure.WebJobs.Extensions.Storage" Version="3.0.3" />
<PackageReference Include="Microsoft.NET.Sdk.Functions" Version="1.0.24" />

并且在blob输入绑定中，对于绑定类型CloudBlobDirectory，路径应该是containerName/directoryName的格式。请参阅样本中的 container，这是可疑的。

我们也可以将传入参数blobName放在blob路径中，直接获取CloudBlockBlob。

[Blob("containerName/directoryName/{blobName}", FileAccess.ReadWrite, Connection = "AzureWebJobsStorage")] CloudBlockBlob blob

更新

确保我们没有安装 WindowsAzure.Storage >= v9.3.2，绑定到存储相关数据类型（如 CloudBlockBlob 时似乎存在错误。查看 issue 跟踪。

当我们创建 v2 功能项目时，Microsoft.NET.SDK.Functions 默认引用 WindowsAzure.Storage 9.3.1。这个版本很好用，不用单独安装包

或者我们可以在新版本的 Storage SDK 中使用 Stream 或 string 等数据类型。

Durable Activity 函数可以使用绑定属性吗？

Can Durable Activity Functions use binding attributes?

azure

azure-functions

azure-durable-functions