void MergeSnapshotRevisions(VolumeSnapshotDatabase database, VolumeSource source, BaseArchive archive, int numRevisionsToRemove)
{
try
{
mDatabase = database;
mArchive = archive;
mBusy = true;
List <VolumeSnapshotRevision> revisionHistory = database.GetRevisionHistory();
if (numRevisionsToRemove == revisionHistory.Count)
{
// Need to remove all old revisions, delete everything
FileSync.__Log(this, "Merge deleting all revisions");
database.DeleteAllRevisions();
}
else
{
// now we know how many revisions to remove, need to rebuild the new first revision.
VolumeSnapshotRevision currentRevision = revisionHistory[numRevisionsToRemove];
VolumeSnapshot currentSnapshot = database.LoadSnapshotRevision(source, currentRevision);
FileSync.__Log(this, "Merge is turning revision [" + currentRevision.ToString() + "] into baseline");
TurnSnapshotIntoBaseline(currentSnapshot);
// Now go through all existing snapshot .xml files and change any files referencing
// a snapshot that has been removed and change it to the current snapshot revision.
for (int revisionNum = numRevisionsToRemove + 1; revisionNum < revisionHistory.Count; ++revisionNum)
{
VolumeSnapshotRevision incrementalRevision = revisionHistory[revisionNum];
VolumeSnapshot incrementalSnapshot = database.LoadSnapshotRevision(source, incrementalRevision);
FileSync.__Log(this, "Merge is reflecting revision [" + incrementalRevision.ToString() + "] into new baseline [" + currentRevision.ToString() + "]");
UpdateSnapshotToReflectBaselineRevision(incrementalSnapshot, currentRevision);
}
// delete old revision data
for (int revisionNum = 0; revisionNum < numRevisionsToRemove; ++revisionNum)
{
VolumeSnapshotRevision revisionToDelete = revisionHistory[revisionNum];
FileSync.__Log(this, "Merge is deleting revision [" + revisionToDelete.ToString() + "]");
database.DeleteSnapshotRevision(revisionToDelete);
}
}
}
catch (System.Exception ex)
{
FileSync.__LogError(this, "Volume.CheckForExpiredSnapshotRevisions", ex);
}
finally
{
mBusy = false;
}
}
public void DeleteAllRevisions()
{
mDatabase.DeleteAllRevisions();
mArchive.DeleteAllRevisions();
}
void MergeSnapshotRevisions( VolumeSnapshotDatabase database, VolumeSource source, BaseArchive archive, int numRevisionsToRemove )
{
try
{
mDatabase = database;
mArchive = archive;
mBusy = true;
List<VolumeSnapshotRevision> revisionHistory = database.GetRevisionHistory();
if ( numRevisionsToRemove == revisionHistory.Count )
{
// Need to remove all old revisions, delete everything
FileSync.__Log( this, "Merge deleting all revisions" );
database.DeleteAllRevisions();
}
else
{
// now we know how many revisions to remove, need to rebuild the new first revision.
VolumeSnapshotRevision currentRevision = revisionHistory[ numRevisionsToRemove ];
VolumeSnapshot currentSnapshot = database.LoadSnapshotRevision( source, currentRevision );
FileSync.__Log( this, "Merge is turning revision [" + currentRevision.ToString() + "] into baseline" );
TurnSnapshotIntoBaseline( currentSnapshot );
// Now go through all existing snapshot .xml files and change any files referencing
// a snapshot that has been removed and change it to the current snapshot revision.
for ( int revisionNum = numRevisionsToRemove + 1; revisionNum < revisionHistory.Count; ++revisionNum )
{
VolumeSnapshotRevision incrementalRevision = revisionHistory[ revisionNum ];
VolumeSnapshot incrementalSnapshot = database.LoadSnapshotRevision( source, incrementalRevision );
FileSync.__Log( this, "Merge is reflecting revision [" + incrementalRevision.ToString() + "] into new baseline [" + currentRevision.ToString() + "]" );
UpdateSnapshotToReflectBaselineRevision( incrementalSnapshot, currentRevision );
}
// delete old revision data
for ( int revisionNum = 0; revisionNum < numRevisionsToRemove; ++revisionNum )
{
VolumeSnapshotRevision revisionToDelete = revisionHistory[ revisionNum ];
FileSync.__Log( this, "Merge is deleting revision [" + revisionToDelete.ToString() + "]" );
database.DeleteSnapshotRevision( revisionToDelete );
}
}
}
catch ( System.Exception ex )
{
FileSync.__LogError( this, "Volume.CheckForExpiredSnapshotRevisions", ex );
}
finally
{
mBusy = false;
}
}
