/// <summary>
/// Create instance of USN journal service
/// </summary>
/// <param name="sources"></param>
/// <param name="snapshot"></param>
/// <param name="filter"></param>
/// <param name="lastfilesetid"></param>
/// <returns></returns>
private UsnJournalService GetJournalService(IEnumerable <string> sources, ISnapshotService snapshot, IFilter filter, long lastfilesetid)
{
if (m_options.UsnStrategy == Options.OptimizationStrategy.Off)
{
return(null);
}
var journalData = m_database.GetChangeJournalData(lastfilesetid);
var service = new UsnJournalService(sources, snapshot, filter, m_options.FileAttributeFilter, m_options.SkipFilesLargerThan,
journalData, cancellationTokenSource.Token);
foreach (var volumeData in service.VolumeDataList)
{
if (volumeData.IsFullScan)
{
if (volumeData.Exception == null || volumeData.Exception is UsnJournalSoftFailureException)
{
// soft fail
Logging.Log.WriteInformationMessage(LOGTAG, "SkipUsnForVolume",
"Performing full scan for volume \"{0}\": {1}", volumeData.Volume, volumeData.Exception?.Message);
}
else
{
if (m_options.UsnStrategy == Options.OptimizationStrategy.Auto)
{
Logging.Log.WriteInformationMessage(LOGTAG, "FailedToUseChangeJournal",
"Failed to use change journal for volume \"{0}\": {1}", volumeData.Volume, volumeData.Exception.Message);
}
else if (m_options.UsnStrategy == Options.OptimizationStrategy.On)
{
Logging.Log.WriteWarningMessage(LOGTAG, "FailedToUseChangeJournal", volumeData.Exception,
"Failed to use change journal for volume \"{0}\": {1}", volumeData.Volume, volumeData.Exception.Message);
}
else
{
throw volumeData.Exception;
}
}
}
}
return(service);
}