protected override void OnStart()
{
var fileNamesWithoutExtension = Directory.GetFiles(directory, "*.upgrade").Select(Path.GetFileNameWithoutExtension);
var latestUpgrade = new List <long>();
foreach (var fileNameWithoutExtension in fileNamesWithoutExtension)
{
long upgradeTime;
if (long.TryParse(fileNameWithoutExtension, out upgradeTime))
{
latestUpgrade.Add(upgradeTime);
}
}
if (latestUpgrade.Count == 0)
{
return;
}
latestUpgrade.Sort(); // ascending
latestUpgrade.Reverse(); // descending
tokenSource = new CancellationTokenSource();
var fileTime = latestUpgrade[0];
var latest = DateTime.FromFileTimeUtc(fileTime);
// File exists, so assume in progress
staleIndexInfoStore.Store(new StaleIndexInfo {
InProgress = true, StartedAt = latest
});
checkTask = Task.Run(async() =>
{
while (!tokenSource.IsCancellationRequested)
{
if (!await staleIndexChecker.IsReindexingInComplete(latest, tokenSource.Token).ConfigureAwait(false))
{
continue;
}
try
{
File.Delete(Path.Combine(directory, $"{fileTime}.upgrade"));
}
catch (IOException)
{
// if we can't delete for now that is OK
}
staleIndexInfoStore.Store(StaleIndexInfoStore.NotInProgress);
break;
}
});
}
