I am making a small App that should list the number of items in my Azure queues. When I use FetchAttributesAsync and ApproximateMessageCount in a Console App, I get the expected result in ApproximateMessageCount after a call to FetchAttributesAsync (or FetchAttributes).
When I use the same in a Universal Windows app, ApproximateMessageCount remains stuck at null
after a call to FetchAttributesAsync (FetchAttributes is not available there).
Console code:
CloudStorageAccount _account;
if (CloudStorageAccount.TryParse(_connectionstring, out _account))
{
var queueClient = _account.CreateCloudQueueClient();
Console.WriteLine(" {0}", _account.QueueEndpoint);
Console.WriteLine(" ----------------------------------------------");
var queues = (await queueClient.ListQueuesSegmentedAsync(null)).Results;
foreach (CloudQueue q in queues)
{
await q.FetchAttributesAsync();
Console.WriteLine($" {q.Name,-40} {q.ApproximateMessageCount,5}");
}
}
Universal App code:
IEnumerable<CloudQueue> queues;
CloudStorageAccount _account;
CloudQueueClient queueClient;
CloudStorageAccount.TryParse(connectionstring, out _account);
queueClient = _account.CreateCloudQueueClient();
queues = (await queueClient.ListQueuesSegmentedAsync(null)).Results;
foreach (CloudQueue q in queues)
{
await q.FetchAttributesAsync();
var count = q.ApproximateMessageCount;
// count is always null here!!!
}
I have tried all kinds of alternatives, like Wait()'s and such on the awaitables. Whatever I try, the ApproximateMessageCount
stays a null
with dertermination :-(.
Am I missing something?
I think you have discovered a bug in the storage client library. I looked up the code on Github and essentially instead of reading the value for
Approximate Message Count
header, the code is reading the value forLease Status
header.In
QueueHttpResponseParsers.cs
class:This method should have been:
I have submitted a bug for this: https://github.com/Azure/azure-storage-net/issues/155.