public void AddTaskToQueue(LongRunningTask task)
{
if (task == null)
{
throw new ArgumentNullException(nameof(task));
}
logger.LogDebug($"Added task \"{task.Title}\" to queue.");
lock (syncLock)
{
if (tasks.Contains(task))
{
return;
}
tasks = tasks.Add(task);
task.CompletionTask.ContinueWith(t => OnCompletedTask(t.Result));
}
}
private void OnCompletedTask(LongRunningTask task)
{
lock (syncLock)
{
// remove completed task
tasks = tasks.Remove(task);
if (!task.IsCompleted)
{
throw new InvalidOperationException("Task is unfinished.");
}
// check result and add to completed
if (task.IsCompletedSuccessfully)
{
logger.LogInformation($"Task \"{task.Title}\" completed successfully. Has been running for {task.Elapsed}.");
}
else
{
logger.LogError(task.FaultException, $"Task \"{task.Title}\" (has been running for {task.Elapsed}): {task.ProgressText ?? "Unknown reason"}");
}
completedTasks = completedTasks.Insert(index: 0, item: task);
}
}