protected override async Task ExecuteAsync(CancellationToken stoppingToken)
{
while (!stoppingToken.IsCancellationRequested)
{
var time = DateTime.UtcNow;
UploadTask[] expiredTasks;
lock (_tasks)
{
expiredTasks = _tasks.Values.Where(t => t.UpdateTime.AddMilliseconds(_options.UploadTaskExpiryMs) <= time).ToArray();
foreach (var task in expiredTasks)
{
_tasks.Remove(task.Id);
}
}
foreach (var task in expiredTasks)
{
try
{
task.Dispose(); // disposal is expensive so run outside lock
_logger.LogInformation($"Upload worker {task.Id} expired after inactivity.");
}
catch (Exception e)
{
_logger.LogWarning(e, $"Failed to dispose upload worker {task.Id}'.");
}
}
await Task.Delay(TimeSpan.FromSeconds(5), stoppingToken);
}
}
/// <summary>
/// Note: This does not dispose the task. The task should be disposed by the creator.
/// </summary>
public UploadTask <T> RemoveTask <T>(string id)
{
lock (_tasks)
{
var task = GetTask <T>(id);
if (task != null)
{
_tasks.Remove(task.Id);
}
return(task);
}
}