private async Task <IdGeneratorState> GetLockedStateAsync(string dataType, CancellationToken cancellationToken)
{
var tryTimeStart = DateTime.UtcNow;
do
{
var idGeneratorState = await idGeneratorStateRepository.GetForDataTypeAsync(dataType) ?? new IdGeneratorState(dataType, 0);
if (idGeneratorState.IsLocked && DateTime.UtcNow - idGeneratorState.LockTime > IdGeneratorState.MaxLockTime)
{
await ReleaseLockAsync(idGeneratorState);
}
if (!idGeneratorState.IsLocked)
{
idGeneratorState.Lock();
if (await idGeneratorStateRepository.TryGetLockAsync(idGeneratorState))
{
return(idGeneratorState);
}
}
await Task.Delay(TryPeriod, cancellationToken);
cancellationToken.ThrowIfCancellationRequested();
} while (DateTime.UtcNow - tryTimeStart < MaxTryTime);
return(null);
}
