void EnsurePeriodicBackgroundSave(CancellationToken stoppingToken)
{
if (!queue.NeedsSaving)
{
return;
}
if (backgroundSave == null || backgroundSave.IsCompleted)
{
logger.LogInformation("Starting periodic queue saving");
backgroundSave = Task.Run(async() =>
{
while (!stoppingToken.IsCancellationRequested)
{
try
{
var delay = TimeSpan.FromMilliseconds(options.Value
.PeriodicBackgroundSaveIntervalMilliseconds);
await Task.Delay(
delay,
stoppingToken);
await PersistQueue();
var length = await queue.GetLength();
if (length == 0 && !inprogress)
{
logger.LogInformation("Stopping periodic queue saving as queue is empty");
break;
}
logger.LogInformation("Periodic save of queue to storage complete. Next save in {time:#}s",
delay.TotalSeconds);
}
catch (OperationCanceledException)
{
}
}
}, stoppingToken);
}
}
public async Task <QueueInfo> Get()
{
var queueLength = await queue.GetLength();
var deadLetterItems = await queue.GetDeadLetterItems();
return(new QueueInfo
{
Date = DateTime.UtcNow,
QueueLength = queueLength,
DeadLetterLength = deadLetterItems.Count
});
}