public async ValueTask <ThumbnailCache?> FindOneAsync(NestedPath filePath, int width, int height, ThumbnailResizeType resizeType, ThumbnailFormatType formatType)
{
await Task.Delay(1).ConfigureAwait(false);
using (await _asyncLock.LockAsync())
{
var id = new ThumbnailCacheIdEntity()
{
FilePath = NestedPathEntity.Import(filePath),
ThumbnailWidth = width,
ThumbnailHeight = height,
ThumbnailResizeType = resizeType,
ThumbnailFormatType = formatType,
};
var storage = this.GetStorage();
var liteFileInfo = storage.FindById(id);
if (liteFileInfo is null)
{
return(null);
}
using (var inStream = liteFileInfo.OpenRead())
{
return(RocketMessage.FromStream <ThumbnailCache>(inStream));
}
}
}
public async ValueTask InsertAsync(ThumbnailCache entity)
{
await Task.Delay(1).ConfigureAwait(false);
using (await _asyncLock.LockAsync())
{
var id = new ThumbnailCacheIdEntity()
{
FilePath = NestedPathEntity.Import(entity.FileMeta.Path),
ThumbnailWidth = (int)entity.ThumbnailMeta.Width,
ThumbnailHeight = (int)entity.ThumbnailMeta.Height,
ThumbnailResizeType = entity.ThumbnailMeta.ResizeType,
ThumbnailFormatType = entity.ThumbnailMeta.FormatType,
};
var storage = this.GetStorage();
if (!_database.BeginTrans())
{
_logger.Error("current thread already in a transaction");
throw new Exception();
}
try
{
using (var outStream = storage.OpenWrite(id, "-"))
{
RocketMessage.ToStream(entity, outStream);
}
if (!_database.Commit())
{
_logger.Error("failed to commit");
throw new Exception();
}
}
catch (Exception e)
{
_logger.Debug(e);
_database.Rollback();
}
}
}