public BackgroundTaskScheduler(string name, DateTime referenceTime)
{
Name = name;
ReferenceTime = referenceTime;
Settings = new BackgroundTaskSettings {
Name = name
};
State = new BackgroundTaskState {
Name = name
};
}
private async Task UpdateAsync(CancellationToken stoppingToken)
{
var referenceTime = DateTime.UtcNow;
if (stoppingToken.IsCancellationRequested)
{
return;
}
var tasks = _serviceProvider.GetServices <IBackgroundTask>();
CleanSchedulers();
var backgroundTaskSettingsProvider = _serviceProvider.GetRequiredService <IBackgroundTaskSettingsProvider>();
foreach (var task in tasks)
{
var taskName = task.GetTaskName();
if (!_schedulers.TryGetValue(taskName, out var scheduler))
{
_schedulers[taskName] = scheduler = new BackgroundTaskScheduler(taskName, referenceTime);
}
BackgroundTaskSettings settings = null;
settings = await backgroundTaskSettingsProvider.GetSettingsAsync(task);
scheduler.Settings = settings ?? task.GetDefaultSettings();
}
void CleanSchedulers()
{
var validKeys = tasks.Select(task => task.GetTaskName()).ToArray();
var keys = _schedulers.Select(kv => kv.Key).ToArray();
foreach (var key in keys)
{
if (!validKeys.Contains(key))
{
_schedulers.TryRemove(key, out var scheduler);
}
}
}
}