public async Task <Event> Post(Event @event)
{
_eventShareDbContext.Events.Add(@event);
await _eventShareDbContext.SaveChangesAsync().ConfigureAwait(false);
return(@event);
}
protected override async Task ExecuteAsync(CancellationToken stoppingToken)
{
while (!stoppingToken.IsCancellationRequested)
{
_logger.LogInformation("Worker running at: {time}", DateTimeOffset.Now);
try
{
var events = await _eventPoller.DoPollAsync(stoppingToken).ConfigureAwait(false);
var existingEventTitles = await _eventShareDbContext.Events
.Where(e => e.DateAndTime >= DateTime.Now)
.Select(e => e.Title)
.ToListAsync(stoppingToken)
.ConfigureAwait(false);
var newEvents = events
.Where(e => !existingEventTitles.Any(t => t.Equals(e.Title, StringComparison.InvariantCultureIgnoreCase)))
.ToList();
if (newEvents.Any())
{
await _eventShareDbContext.Events.AddRangeAsync(newEvents, stoppingToken).ConfigureAwait(false);
await _eventShareDbContext.SaveChangesAsync(stoppingToken).ConfigureAwait(false);
}
}
catch (Exception ex)
{
_logger.LogError($"Polling round failed with {ex}");
}
await Task.Delay(_workerPeriod, stoppingToken);
}
}
public async Task <IEnumerable <Event> > DoPollAsync(CancellationToken cancellationToken)
{
if (_currentPoll != PollResults.Count)
{
return(PollResults[_currentPoll++]);
}
_currentPoll = 0;
var eventsToRemove = _eventShareDbContext.Events
.Where(e => e.Title == "Fake Event #1" ||
e.Title == "Fake Event #2" ||
e.Title == "Fake Event #3" ||
e.Title == "Fake Event #4");
await eventsToRemove
.ForEachAsync(e =>
{
var entity = _eventShareDbContext.Find <Event>(e.Id);
_eventShareDbContext.Entry(entity).State = EntityState.Deleted;
}, cancellationToken)
.ConfigureAwait(false);
await _eventShareDbContext.SaveChangesAsync(cancellationToken).ConfigureAwait(false);
return(Enumerable.Empty <Event>());
}