static async Task<Tuple<EventData, string>[]> CollectEventHubMessagesAsync(EventHubReceiver[] receivers, int messagesPending)
{
List<Task<EventData>> receiveTasks = receivers.Select(r => r.ReceiveAsync(TimeSpan.FromMinutes(20))).ToList();
var ehMessages = new Tuple<EventData, string>[messagesPending];
while (true)
{
Task<EventData> receivedTask = await Task.WhenAny(receiveTasks);
EventData eventData = receivedTask.Result;
if (eventData != null)
{
ehMessages[messagesPending - 1] = Tuple.Create(eventData, Encoding.UTF8.GetString(eventData.GetBytes()));
if (--messagesPending == 0)
{
break;
}
}
int receivedIndex = receiveTasks.IndexOf(receivedTask);
receiveTasks[receivedIndex] = receivers[receivedIndex].ReceiveAsync(TimeSpan.FromMinutes(20));
}
return ehMessages;
}