public async Task <List <Tour> > Search(SearchTourDto dto,
CancellationToken cancellationToken = default(CancellationToken))
{
var tasks = _searchServices
.Select(x => SearchTaskWithTimeout(x, dto))
.ToList();
var results = await Task.WhenAll(tasks);
return(_toursMerger.Merge(results));
}
public async Task <List <Tour> > Search(SearchTourDto dto,
CancellationToken cancellationToken = default(CancellationToken))
{
var random = new Random();
var seconds = random.Next(3, 18);
await Task.Delay(TimeSpan.FromSeconds(seconds), cancellationToken);
var spec = BuildSpec(dto);
var query = _tuiContext.Tours
.AsNoTracking()
.Where(spec.ToExpression())
.Take(1000);
switch (dto.OrderBy)
{
case OrderBy.Price:
query = query.OrderBy(x => x.PricePerPerson);
break;
case OrderBy.PriceDesc:
query = query.OrderByDescending(x => x.PricePerPerson);
break;
//Если не указано, то по дате регистрации
case null:
case OrderBy.Date:
query = query.OrderBy(x => x.DateRegistration);
break;
case OrderBy.DateDesc:
query = query.OrderByDescending(x => x.DateRegistration);
break;
default:
throw new ArgumentOutOfRangeException();
}
return(await query.ToListAsync(cancellationToken));
}
private Specification <Tour> BuildSpec(SearchTourDto dto)
{
var spec = Specification <Tour> .Empty;
if (dto.CityDepartureId.HasValue)
{
spec = spec.And(new TourWithCityDepartureSpec(dto.CityDepartureId.Value));
}
if (dto.CityArrivalId.HasValue)
{
spec = spec.And(new TourWithCityArrivalSpec(dto.CityArrivalId.Value));
}
if (!string.IsNullOrWhiteSpace(dto.DateRegistration))
{
spec = spec.And(new TourWithDateRegistrationSpec(DateTime.Parse(dto.DateRegistration)));
}
if (dto.MinNights.HasValue)
{
spec = spec.And(new TourWithNightCountGreaterSpec(dto.MinNights.Value));
}
if (dto.MaxNights.HasValue)
{
spec = spec.And(new TourWithNightCountLessSpec(dto.MaxNights.Value));
}
if (dto.RoomCapacity.HasValue)
{
spec = spec.And(new TourWithRoomCapacity(dto.RoomCapacity.Value));
}
return(spec);
}
private async Task <List <Tour> > SearchTaskWithTimeout(ISearchService service, SearchTourDto dto)
{
using (var tokenSource = new CancellationTokenSource())
{
var searchTask = service.Search(dto, tokenSource.Token);
//Ждём, что закончится быстрее: таймаут или поиск
var completedTask = await Task.WhenAny(searchTask,
Task.Delay(TimeSpan.FromSeconds(_aggregatorTimeout.Seconds), tokenSource.Token));
tokenSource.Cancel();
if (completedTask == searchTask)
{
return(await searchTask);
}
return(new List <Tour>());
}
}
public async Task <IActionResult> Get([FromQuery] SearchTourDto dto)
{
var result = await _searchService.Search(dto);
return(Ok(result));
}
