[英]DocumentDB TransientFaultHandling Best Practice
I've been writing very verbose retry logic for throttled DocumentDB client calls. 我一直在为受限制的DocumentDB客户端调用编写非常详细的重试逻辑。
The example below is a common example of this with 10 retry attempts. 下面的示例是10次重试尝试的常见示例。
My question is two fold: Is this best practice, and is there a less verbose way to handle this? 我的问题有两个方面:这是最好的做法,是否有一种不那么冗长的方式来处理这个问题? I see that there is a Microsoft.Azure.Documents.Client.TransientFaultHandling nuget package that is supposed to achieve the same results with less code, but I cannot find any examples on StackOverflow or Google and there does not seem to be any clear documentation available from Microsoft. 我看到有一个Microsoft.Azure.Documents.Client.TransientFaultHandling nuget包应该用更少的代码实现相同的结果,但我在StackOverflow或Google上找不到任何示例,似乎没有任何明确的文档可用来自微软。
int maxRetryAttempts = 10;
while (maxRetryAttempts > 0)
{
try
{
// Attempt to call DocumentDB Method
// ---[DocumentDB Method Here]---
}
catch (DocumentClientException de)
{
if (de.StatusCode.HasValue)
{
var statusCode = (int)de.StatusCode;
if (statusCode == 429 || statusCode == 503)
{
//Sleep for retry amount
Thread.Sleep(de.RetryAfter);
//Decrement max retry attempts
maxRetryAttempts--;
}
}
}
catch (AggregateException ae)
{
foreach (Exception ex in ae.InnerExceptions)
{
if (ex is DocumentClientException)
{
var documentClientException = ex as DocumentClientException;
var statusCode = (int)documentClientException.StatusCode;
if (statusCode == 429 || statusCode == 503)
{
//Sleep for retry amount
Thread.Sleep(documentClientException.RetryAfter);
//Decrement max retry attempts
maxRetryAttempts--;
}
else
{
throw;
}
}
}
}
}
if (maxRetryAttempts < 0)
{
//Max retry attempts reached
}
You can find sample code using the TransientFaultHandling Nuget package in the Github repo for the DocumentDB Data Migration Tool: 您可以使用DocumentU数据迁移工具的Github存储库中的TransientFaultHandling Nuget包找到示例代码:
https://github.com/Azure/azure-documentdb-datamigrationtool/blob/master/DocumentDb/Microsoft.DataTransfer.DocumentDb.FunctionalTests/DocumentDbHelper.cs https://github.com/Azure/azure-documentdb-datamigrationtool/blob/master/DocumentDb/Microsoft.DataTransfer.DocumentDb.FunctionalTests/DocumentDbHelper.cs
Which looks something like this: 看起来像这样:
private static IReliableReadWriteDocumentClient CreateClient(IDocumentDbConnectionSettings connectionSettings)
{
return new DocumentClient(new Uri(connectionSettings.AccountEndpoint), connectionSettings.AccountKey)
.AsReliable(new FixedInterval(10, TimeSpan.FromSeconds(1)));
}
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