/// <inheritdoc />
public void OnNext(ChangedFileIdInfo value)
{
Entry entry;
if (m_entries.TryGetValue(value.FileIdAndVolumeId, out entry))
{
if (value.UsnRecord.Usn > entry.Usn)
{
switch (value.UsnRecord.Reason.LinkImpact())
{
case LinkImpact.None:
case LinkImpact.SingleLink:
// Update with new USN.
m_entries.TryUpdate(value.FileIdAndVolumeId, entry.WithNewUsn(value.UsnRecord.Usn), entry);
++m_observerData.UpdatedUsnEntryByJournalScanningCount;
break;
case LinkImpact.AllLinks:
// Remove from mapping.
m_entries.TryRemove(value.FileIdAndVolumeId, out entry);
++m_observerData.RemovedEntryByJournalScanningCount;
break;
}
}
}
}
/// <inheritdoc />
public void OnNext(ChangedFileIdInfo value)
{
Entry entry;
if (m_entries.TryGetValue(value.FileIdAndVolumeId, out entry))
{
if (value.UsnRecord.Usn > entry.Usn)
{
switch (value.UsnRecord.Reason.LinkImpact())
{
case LinkImpact.None:
case LinkImpact.SingleLink:
// Update with new USN only if entry's USN matches previously tracked USN or the file id's entry was updated before.
// We track whether file id's entry was updated or not because some operations can have more than one USN records.
// For example, file renaming has at least two records, "RenameOldName" followed by "RenameNewName".
// Another example is timestamp modification can come with "BasicInfoChange" followed by "BasicInfoChange|Close".
// If the entry is updated by the first record, and we don't keep track that fact, then the new record will
// invalidate the updated entry because it will have more up-to-date USN.
if (m_updatedFileId.Contains(value.FileIdAndVolumeId) || value.LastTrackedUsn == entry.Usn)
{
m_entries.TryUpdate(value.FileIdAndVolumeId, entry.WithNewUsn(value.UsnRecord.Usn), entry);
m_updatedFileId.Add(value.FileIdAndVolumeId);
++m_observerData.UpdatedUsnEntryByJournalScanningCount;
}
break;
case LinkImpact.AllLinks:
// Remove from mapping.
m_entries.TryRemove(value.FileIdAndVolumeId, out _);
++m_observerData.RemovedEntryByJournalScanningCount;
break;
}
}
}
}
/// <inheritdoc />
public void OnNext(ChangedFileIdInfo value)
{
}
