庆军之菜鸟记录-定期检查并删除数据

不得不说，跟大佬们的差距是亿点点啊。

private async Task ExpiryScanLoop()
{
    var cancelToken = _scanExpiryCancellationToken!.Token;
    while (cancelToken.IsCancellationRequested == false)
    {
        try
        {
            await Task.Delay(_options.ExpiryKeyScanInterval, cancelToken);
            using var sessionWrap = GetSessionWrap();
            using var iter = sessionWrap.Session.Iterate();
            while (iter.GetNext(out _) && cancelToken.IsCancellationRequested == false)
            {
                var key = iter.GetKey();
                var context = new StoreContext<ValueWrapper<TValue>>();
                var result = sessionWrap.Session.Read(key, context);
                if (result.status.IsPending)
                {
                    sessionWrap.Session.CompletePending(true);
                    context.FinalizeRead(out result.status, out result.output);
                }

                if (result.status.Found && result.output.HasExpired(_systemClock.NowUnixTimestamp()))
                {
                    sessionWrap.Session.Delete(key);
                }
            }
        }
        catch (Exception ex)
        {
            _logger?.LogWarning("Exception thrown in expiry scan loop:{Ex}", ex);
        }
    }
}

这段代码摘抄于时总的FasterKv.Cache.Core.

如果是我，我只会timer然后1s一次的去执行。

补充初始化与结束

...init

private readonly CancellationTokenSource? _scanExpiryCancellationToken;

    public TimeSpan ExpiryKeyScanInterval { get; set; } = TimeSpan.FromMinutes(5);

 private void Dispose(bool _)
 {
     _scanExpiryCancellationToken?.Cancel();...