public RangeRequestInfo(RangedQueryIndivisualResultCallback handler)
{
this.handler = handler;
this.IsCancelled = false;
}
public static async void StartRequestImagePathForCalendar(IEnumerable<DateTime> list, RangedQueryIndivisualResultCallback handler)
{
if (list == null) throw new ArgumentNullException("list");
if (handler == null) throw new ArgumentNullException("handler");
var currentRangeInfo = _currentRangeRequestInfo;
if (currentRangeInfo != null) currentRangeInfo.StopTasks();
_currentRangeRequestInfo = currentRangeInfo = new RangeRequestInfo(handler);
DateTime maxTime = DateTime.MinValue, minTime = DateTime.MaxValue;
foreach (var item in list)
{
if (maxTime < item.Date) maxTime = item.Date;
if (minTime > item.Date) minTime = item.Date;
}
var infos = await _readonlyStore.ReadImageInfosAsync(minTime, maxTime);
if (infos != null)
{
var llist = new LinkedList<Task>();
for (int i = 0; i < infos.Length; i++)
{
var info = infos[i];
llist.AddLast(Task.Run(async () => await RequestImagePathForCalendarStartRequestAsync(info, currentRangeInfo)));
if (llist.Count == 9)
{
// limit to 9 running at the same time
await Task.WhenAny(llist);
var walker = llist.First;
while (walker != null)
{
if (walker.Value.IsCompleted)
{
var marked = walker;
walker = walker.Next;
llist.Remove(marked);
}
else walker = walker.Next;
}
}
}
llist.Clear(); // don't care about thread endstats;
}
}