public async Task <PendingActivity> GetPendingActivity(string activityName, string workerId, TimeSpan?timeout = null)
{
var endTime = _dateTimeProvider.UtcNow.Add(timeout ?? TimeSpan.Zero);
var firstPass = true;
EventSubscription subscription = null;
while ((subscription == null && _dateTimeProvider.UtcNow < endTime) || firstPass)
{
if (!firstPass)
{
await Task.Delay(100);
}
subscription = await _subscriptionRepository.GetFirstOpenSubscription(Event.EventTypeActivity, activityName, _dateTimeProvider.Now);
if (subscription != null)
{
if (!await _lockProvider.AcquireLock($"sub:{subscription.Id}", CancellationToken.None))
{
subscription = null;
}
}
firstPass = false;
}
if (subscription == null)
{
return(null);
}
try
{
var token = Token.Create(subscription.Id, subscription.EventKey);
var result = new PendingActivity
{
Token = token.Encode(),
ActivityName = subscription.EventKey,
Parameters = subscription.SubscriptionData,
TokenExpiry = DateTime.MaxValue
};
if (!await _subscriptionRepository.SetSubscriptionToken(subscription.Id, result.Token, workerId, result.TokenExpiry))
{
return(null);
}
return(result);
}
finally
{
await _lockProvider.ReleaseLock($"sub:{subscription.Id}");
}
}
private void GetActivityViewModelList(List <Activity> activityList, string courseId)
{
foreach (var activity in activityList)
{
ActivityViewModel activityViewModel = new ActivityViewModel(activity);
activityViewModel.CourseId = courseId;
if (activity.Status == 1)
{
PendingActivity.Add(activityViewModel);
}
else if (activity.Status == 2)
{
OverDueActivity.Add(activityViewModel);
}
else if (activity.Status == 3)
{
CompletedActivity.Add(activityViewModel);
}
}
}
public ParticipantCourseDetailViewModel(CourseViewModel selectedCourse)
{
this._SelectedCourse = selectedCourse;
GetActivityViewModelList(this._SelectedCourse.ActivityList, selectedCourse.CourseId);
MessagingCenter.Subscribe <AssessmentSubmitViewModel> (this, "ActivityCompleted", (sender) => {
foreach (var activity in PendingActivity)
{
if (activity.ActivityId.Equals(sender.ActivityId) && activity.CourseId.Equals(sender.CourseId))
{
activity.Status = 3;
PendingActivity.Remove(activity);
CompletedActivity.Add(activity);
break;
}
}
RaisePropertyChanged("CanShowPending");
RaisePropertyChanged("CanShowCompleted");
RaisePropertyChanged(() => CompletedActivity);
RaisePropertyChanged(() => PendingActivity);
});
}
