IList <Task> MakeTasks(bool useSecondaryQueue = false, int numberOfTasks = 0)
{
return(Enumerable.Range(0, numberOfTasks).Select((i) => {
Log.Debug($"Registering Dequeuer #{i}");
return Task.Factory.StartNew(() => {
var queue = QueueAdapter.Make(useSecondaryQueue, QueueSettings, MailSettings);
queue.Id = i;
queueAdapters.Add(queue);
queue.Consume(CancellationTokenSource.Token);
}, TaskCreationOptions.LongRunning);
}).ToList());
}
public async Task StartAsync()
{
var allTasks = new List <Task>();
Log.Debug("Start dequeue tasks for primary queue...");
allTasks.AddRange(MakeTasks(true, QueueSettings.PrimaryQueueConsumers));
Log.Debug("Start dequeue tasks for secondary queue...");
allTasks.AddRange(MakeTasks(false, QueueSettings.SecondaryQueueConsumers));
await Task.WhenAll(allTasks);
// Recover from restart, if necessary.
QueueAdapter.Make(false, QueueSettings, MailSettings).Recover();
QueueAdapter.Make(true, QueueSettings, MailSettings).Recover();
}