public void OutputToXml(XmlTextWriter xmlWriter) { xmlWriter.WriteStartElement(VolumeSnapshotXml.XmlSnapshotElement); xmlWriter.WriteAttributeString(VolumeSnapshotXml.XmlRevisionElement, mRevision.ToString()); mRoot.OutputToXml(xmlWriter); xmlWriter.WriteEndElement(); }
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 VolumeSnapshot LoadSnapshotRevision(VolumeSource source, VolumeSnapshotRevision revision) { if (mSnapshotDictionary.ContainsKey(revision)) { return(mSnapshotDictionary[revision]); } else { if (!mSnapshotXmlCache.ContainsKey(revision)) { throw new Exception("Could not locate snapshot revision '" + revision.ToString() + "' in database"); } string xmlFragment = mSnapshotXmlCache[revision]; XmlDocument doc = new XmlDocument(); doc.LoadXml(xmlFragment); XmlNode snapshotXmlNode = PWLib.XmlHelp.GetFirstChildWithName(doc, VolumeSnapshotXml.XmlSnapshotElement); VolumeSnapshot snapshot = VolumeSnapshot.BuildFromXml(source, snapshotXmlNode); mSnapshotDictionary.Add(revision, snapshot); return(snapshot); } }
public bool DoBackup(ref bool outputToXmlRequired) { VolumeSnapshot currentSnapshot = null; bool backupSuccess = false; bool noChangesRequired = false; outputToXmlRequired = false; mCancelledByUser = false; try { mBusy = true; FileSync.__Log(this, "Building standing on disk snapshot..."); // Take a snapshot of the volume as it stands on disk currentSnapshot = VolumeSnapshot.BuildFromSource(mSource); if (!currentSnapshot.Empty) { FileSync.__Log(this, "Snapshot built, " + currentSnapshot.FileCount + " files found"); VolumeSnapshotRevision mostRecentRevision = mDatabase.GetMostRecentRevision(); // Compare to previous snapshot if (mostRecentRevision != null) { FileSync.__Log(this, "Starting incremental backup, " + mDatabase.GetRevisionHistory().Count + " revisions existing [Most recent: " + mostRecentRevision.ToString() + "]"); // Only do an incremental backup to backup whats changed since last full snapshot VolumeSnapshot mostRecentSnapshot = mDatabase.LoadSnapshotRevision(mSource, mostRecentRevision); backupSuccess = mBackupOperation.DoIncrementalBackup(currentSnapshot, mostRecentSnapshot, mSource, mArchive, out noChangesRequired); FileSync.__Log(this, "Incremental backup " + (backupSuccess ? "completed successfully" : "failed") + " " + (noChangesRequired ? "no changes required" : "changes detected")); } else { FileSync.__Log(this, "Starting full initial backup"); // Brand new volume backup, do a full backup of the volume backupSuccess = mBackupOperation.DoFullBackup(currentSnapshot, mSource, mArchive); FileSync.__Log(this, "Full backup " + (backupSuccess ? "completed successfully" : "failed")); } if (backupSuccess) { if (!noChangesRequired) { FileSync.__Log(this, "Saving snapshot revision file [" + currentSnapshot.Revision.ToString() + "]"); mDatabase.SaveSnapshotRevision(currentSnapshot); outputToXmlRequired = true; FileSync.__Log(this, "Snapshot file saved"); } else { FileSync.__Log(this, "No changes required, not saving revision [" + currentSnapshot.Revision.ToString() + "]"); } } else { FileSync.__Log(this, "Backup failed, deleting temporary files for revision [" + currentSnapshot.Revision.ToString() + "]"); mDatabase.DeleteSnapshotRevision(currentSnapshot.Revision); // remove half-copied data mArchive.DeleteRevision(currentSnapshot.Revision); outputToXmlRequired = true; } } else { FileSync.__Log(this, "Built snapshot is empty, aborting backup"); } } catch (Exception e) { backupSuccess = false; FileSync.__LogError(this, "BackupRestoreVolume.DoBackup", e); if (currentSnapshot != null) { FileSync.__Log(this, "Backup failed due to exception caught, deleting temporary files for revision [" + currentSnapshot.Revision.ToString() + "]"); mDatabase.DeleteSnapshotRevision(currentSnapshot.Revision); // remove half-copied data mArchive.DeleteRevision(currentSnapshot.Revision); } outputToXmlRequired = true; } finally { mBusy = false; } return(backupSuccess); }
public override string ToString() { return(mRevision.ToString() + ":" + mFileName); }
private string RelativePathToOnDiskPath(VolumeSnapshotRevision revision, string relativePath) { string path = mStoragePath + PWLib.Platform.Windows.Path.DirectorySeparatorChar + revision.ToString() + relativePath; return(path); }