public IFetchedJob Dequeue(string[] queues, CancellationToken cancellationToken)
{
BrokeredMessage message = null;
var queueIndex = 0;
var clients = queues
.Select(queue => _manager.GetClient(queue))
.ToArray();
do
{
cancellationToken.ThrowIfCancellationRequested();
try
{
var client = clients[queueIndex];
message = queueIndex == queues.Length - 1
? client.Receive(SyncReceiveTimeout)
: client.Receive(MinSyncReceiveTimeout);
}
catch (TimeoutException)
{
}
queueIndex = (queueIndex + 1) % queues.Length;
} while (message == null);
return(new ServiceBusQueueFetchedJob(message));
}
public IEnumerable <int> GetEnqueuedJobIds(string queue, int @from, int perPage)
{
var client = _manager.GetClient(queue);
var jobIds = new List <int>();
// We have to overfetch to retrieve enough messages for paging.
// e.g. @from = 10 and page size = 20 we need 30 messages from the start
var messages = client.PeekBatch(0, @from + perPage).ToArray();
// We could use LINQ here but to avoid creating lots of garbage lists
// through .Skip / .ToList etc. use a simple loop.
for (var i = 0; i < messages.Length; i++)
{
var msg = messages[i];
// Only include the job id once we have skipped past the @from
// number
if (i >= @from)
{
jobIds.Add(int.Parse(msg.GetBody <string>()));
}
msg.Dispose();
}
return(jobIds);
}
public IFetchedJob Dequeue(string[] queues, CancellationToken cancellationToken)
{
BrokeredMessage message = null;
var queueIndex = 0;
var clients = queues
.Select(queue => _manager.GetClient(queue))
.ToArray();
do
{
cancellationToken.ThrowIfCancellationRequested();
try
{
var client = clients[queueIndex];
var isLastQueue = queueIndex == queues.Length - 1;
message = isLastQueue
? client.Receive(_manager.Options.LoopReceiveTimeout) // Last queue
: client.Receive(MinSyncReceiveTimeout);
}
catch (TimeoutException)
{
}
catch (MessagingEntityNotFoundException ex)
{
var errorMessage = string.Format(
"Queue {0} could not be found. Either create the queue manually, " +
"or grant the Manage permission and set ServiceBusQueueOptions.CheckAndCreateQueues to true",
clients[queueIndex].Path);
throw new UnauthorizedAccessException(errorMessage, ex);
}
queueIndex = (queueIndex + 1) % queues.Length;
} while (message == null);
return(new ServiceBusQueueFetchedJob(message));
}