Question

我有一个删除每张桌子的功能。属于受影响用户的blob。

        CloudTable uploadTable = CloudStorageServices.GetCloudUploadsTable();
        TableQuery<UploadEntity> uploadQuery = uploadTable.CreateQuery<UploadEntity>();
        List<UploadEntity> uploadEntity = (from e in uploadTable.ExecuteQuery(uploadQuery)
                                          where e.PartitionKey == "uploads" && e.UserName == User.Idendity.Name
                                          select e).ToList();

        foreach (UploadEntity uploadTableItem in uploadEntity)
        {
            //Delete table
            TableOperation retrieveOperationUploads = TableOperation.Retrieve<UploadEntity>("uploads", uploadTableItem.RowKey);
            TableResult retrievedResultUploads = uploadTable.Execute(retrieveOperationUploads);
            UploadEntity deleteEntityUploads = (UploadEntity)retrievedResultUploads.Result;
            TableOperation deleteOperationUploads = TableOperation.Delete(deleteEntityUploads);
            uploadTable.Execute(deleteOperationUploads);

            //Delete blob
            CloudBlobContainer blobContainer = CloudStorageServices.GetCloudBlobsContainer();
            CloudBlockBlob blob = blobContainer.GetBlockBlobReference(uploadTableItem.BlobName);
            blob.Delete();
        }

每个表都有自己的blob，因此如果列表中包含3个uploadentities，则会删除3个表和3个blob。

我听说您可以使用表批处理操作来降低成本和负载。我尝试过，但失败了。有兴趣帮助我的人:)？

我猜测tablebatch操作仅适用于表，所以它不适用于blob，对吧？

您如何为此代码添加tablebatchoperations？您是否看到可以做的任何其他改进？

谢谢！

Answer 1

我想使用批处理操作，但我不知道如何操作。无论如何，经过一些测试我发现了它。

改进了删除多个实体的代码：

        CloudTable uploadTable = CloudStorageServices.GetCloudUploadTable();
        TableQuery<UserUploadEntity> uploadQuery = uploadTable.CreateQuery<UserUploadEntity>();
        List<UserUploadEntity> uploadEntity = (from e in uploadTable.ExecuteQuery(uploadQuery)
                                               where e.PartitionKey == "useruploads" && e.MapName == currentUser
                                               select e).ToList();

        var batchOperation = new TableBatchOperation();

        foreach (UserUploadEntity uploadTableItem in uploadEntity)
        {
            //Delete upload entities
            batchOperation.Delete(uploadTableItem);

            //Delete blobs
            CloudBlobContainer blobContainer = CloudStorageServices.GetCloudBlobContainer();
            CloudBlockBlob blob = blobContainer.GetBlockBlobReference(uploadTableItem.BlobName);
            blob.Delete();
        }

        uploadTable.ExecuteBatch(batchOperation);

我知道批量操作仅限于100，但在我的情况下，没有什么可担心的。

Azure批处理操作会删除多个blob和表

1 个答案: