private static BaseMetadata readMetadataFromDatabase(string location, ReadOptions options, CancellationToken token, int timeoutSeconds)
{
BaseMetadata metadata = null;
using (MetadataDbCommands metadataCommands = new MetadataDbCommands())
{
metadata = metadataCommands.findMetadataByLocation(location);
if (metadata != null)
{
metadata.IsImported = true;
if (options.HasFlag(ReadOptions.LEAVE_STREAM_OPENED_AFTER_READ))
{
Stream data = FileUtils.waitForFileAccess(location, FileAccess.Read,
FILE_OPEN_ASYNC_TIMEOUT_MS, token);
metadata.Data = data;
}
// check if metadata stored in the database is outdated
FileInfo info = new FileInfo(location);
info.Refresh();
if (info.Exists == false)
{
metadata.MetadataReadError = new FileNotFoundException("File not found", location);
return(metadata);
}
if ((info.LastWriteTime - metadata.LastModifiedDate) > TimeSpan.FromSeconds(10))
{
// metadata is outdated so update in database
Logger.Log.Info("Updated: " + location + " - Database timestamp: " + metadata.LastModifiedDate.ToString() + " Disk timestamp: " + info.LastWriteTime.ToString());
int id = metadata.Id;
metadata = MetadataFileFactory.read(location, options, token, timeoutSeconds);
if (metadata != null)
{
metadata.IsImported = true;
metadata.Id = id;
write(metadata, WriteOptions.WRITE_TO_DATABASE, null);
}
}
if (info.Attributes.HasFlag(FileAttributes.ReadOnly))
{
metadata.IsReadOnly = true;
}
}
}
return(metadata);
}
private static BaseMetadata readMetadataFromDatabase(string location, ReadOptions options, CancellationToken token, int timeoutSeconds)
{
BaseMetadata metadata = null;
using (MetadataDbCommands metadataCommands = new MetadataDbCommands())
{
metadata = metadataCommands.findMetadataByLocation(location);
if (metadata != null)
{
metadata.IsImported = true;
if (options.HasFlag(ReadOptions.LEAVE_STREAM_OPENED_AFTER_READ))
{
Stream data = FileUtils.waitForFileAccess(location, FileAccess.Read,
FILE_OPEN_ASYNC_TIMEOUT_MS, token);
metadata.Data = data;
}
// check if metadata stored in the database is outdated
FileInfo info = new FileInfo(location);
info.Refresh();
if (info.Exists == false)
{
metadata.MetadataReadError = new FileNotFoundException("File not found", location);
return (metadata);
}
if ((info.LastWriteTime - metadata.LastModifiedDate) > TimeSpan.FromSeconds(10))
{
// metadata is outdated so update in database
Logger.Log.Info("Updated: " + location + " - Database timestamp: " + metadata.LastModifiedDate.ToString() + " Disk timestamp: " + info.LastWriteTime.ToString());
int id = metadata.Id;
metadata = MetadataFileFactory.read(location, options, token, timeoutSeconds);
if (metadata != null)
{
metadata.IsImported = true;
metadata.Id = id;
write(metadata, WriteOptions.WRITE_TO_DATABASE, null);
}
}
if (info.Attributes.HasFlag(FileAttributes.ReadOnly))
{
metadata.IsReadOnly = true;
}
}
}
return (metadata);
}
