/// <summary>
/// The process for backing up a directory index is simple:
/// a) create hard links to all the files in the lucene directory in a temp director
/// that gives us the current snapshot, and protect us from Lucene's
/// deleting files.
/// b) copy the hard links to the destination directory
/// c) delete the temp directory
/// </summary>
public void Execute(ProgressNotifier progressNotifier)
{
if (allowOverwrite) // clean destination folder; we want to do this as close as possible to the actual backup operation
{
IOExtensions.DeleteDirectory(destination);
Directory.CreateDirectory(destination);
}
foreach (var file in Directory.EnumerateFiles(tempPath))
{
Notify("Copying " + Path.GetFileName(file), BackupStatus.BackupMessageSeverity.Informational);
var fullName = new FileInfo(file).FullName;
FileCopy(file, Path.Combine(destination, Path.GetFileName(file)), fileToSize[fullName], progressNotifier);
Notify("Copied " + Path.GetFileName(file), BackupStatus.BackupMessageSeverity.Informational);
}
try
{
IOExtensions.DeleteDirectory(tempPath);
}
catch (Exception e) //cannot delete, probably because there is a file being written there
{
logger.WarnException(string.Format("Could not delete {0}, will delete those on startup", tempPath), e);
foreach (var file in Directory.EnumerateFiles(tempPath))
{
MoveFileEx(file, null, MoveFileDelayUntilReboot);
}
MoveFileEx(tempPath, null, MoveFileDelayUntilReboot);
}
}
private void FileCopy(string src, string dest, long size, ProgressNotifier notifier, CancellationToken token)
{
var buffer = new byte[16 * 1024];
using (var srcStream = File.Open(src, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
if (File.Exists(dest))
{
File.SetAttributes(dest, FileAttributes.Normal);
}
using (var destStream = File.Create(dest, buffer.Length))
{
while (true)
{
token.ThrowIfCancellationRequested();
var read = srcStream.Read(buffer, 0, (int)Math.Min(buffer.Length, size));
notifier.UpdateProgress(read, Notify);
if (read == 0)
{
break;
}
size -= read;
destStream.Write(buffer, 0, read);
}
destStream.Flush();
}
}
}
/// <summary>
/// The process for backing up a directory index is simple:
/// a) create hard links to all the files in the lucene directory in a temp director
/// that gives us the current snapshot, and protect us from Lucene's
/// deleting files.
/// b) copy the hard links to the destination directory
/// c) delete the temp directory
/// </summary>
public void Execute(ProgressNotifier progressNotifier, CancellationToken token)
{
if (allowOverwrite) // clean destination folder; we want to do this as close as possible to the actual backup operation
{
IOExtensions.DeleteDirectory(destination);
}
EnsureDirectoryExists(destination);
foreach (var file in Directory.EnumerateFiles(tempPath))
{
token.ThrowIfCancellationRequested();
Notify("Copying " + Path.GetFileName(file), null, BackupStatus.BackupMessageSeverity.Informational);
var fullName = new FileInfo(file).FullName;
FileCopy(file, Path.Combine(destination, Path.GetFileName(file)), fileToSize[fullName], progressNotifier, token);
Notify("Copied " + Path.GetFileName(file), null, BackupStatus.BackupMessageSeverity.Informational);
}
try
{
IOExtensions.DeleteDirectory(tempPath);
}
catch (Exception e) //cannot delete, probably because there is a file being written there
{
logger.WarnException(string.Format("Could not delete {0}, will delete those on startup", tempPath), e);
foreach (var file in Directory.EnumerateFiles(tempPath))
{
MoveFileEx(file, null, MoveFileDelayUntilReboot);
}
MoveFileEx(tempPath, null, MoveFileDelayUntilReboot);
}
}
public void Execute()
{
try
{
string incrementalTag = null;
log.Info("Starting backup of '{0}' to '{1}'", backupSourceDirectory, backupDestinationDirectory);
UpdateBackupStatus(
string.Format("Started backup process. Backing up data to directory = '{0}'",
backupDestinationDirectory), BackupStatus.BackupMessageSeverity.Informational);
if (BackupAlreadyExists) // trying to backup to an existing backup folder
{
if (!incrementalBackup)
throw new InvalidOperationException("Denying request to perform a full backup to an existing backup folder. Try doing an incremental backup instead.");
while (true)
{
incrementalTag = SystemTime.UtcNow.ToString("Inc yyyy-MM-dd HH-mm-ss");
backupDestinationDirectory = Path.Combine(backupDestinationDirectory, incrementalTag);
if (Directory.Exists(backupDestinationDirectory) == false)
break;
Thread.Sleep(100); // wait until the second changes, should only even happen in tests
}
}
else
{
incrementalBackup = false; // destination wasn't detected as a backup folder, automatically revert to a full backup if incremental was specified
}
UpdateBackupStatus(string.Format("Backing up indexes.."), BackupStatus.BackupMessageSeverity.Informational);
// Make sure we have an Indexes folder in the backup location
if (!Directory.Exists(Path.Combine(backupDestinationDirectory, "Indexes")))
Directory.CreateDirectory(Path.Combine(backupDestinationDirectory, "Indexes"));
var directoryBackups = new List<DirectoryBackup>
{
new DirectoryBackup(Path.Combine(backupSourceDirectory, "IndexDefinitions"),
Path.Combine(backupDestinationDirectory, "IndexDefinitions"),
Path.Combine(backupSourceDirectory, "Temp" + Guid.NewGuid().ToString("N")), incrementalBackup)
};
database.IndexStorage.Backup(backupDestinationDirectory);
var progressNotifier = new ProgressNotifier();
foreach (var directoryBackup in directoryBackups)
{
directoryBackup.Notify += UpdateBackupStatus;
var backupSize = directoryBackup.Prepare();
progressNotifier.TotalBytes += backupSize;
}
foreach (var directoryBackup in directoryBackups)
{
directoryBackup.Execute(progressNotifier);
}
UpdateBackupStatus(string.Format("Finished indexes backup. Executing data backup.."), BackupStatus.BackupMessageSeverity.Informational);
ExecuteBackup(backupDestinationDirectory, incrementalBackup);
if (databaseDocument != null)
File.WriteAllText(Path.Combine(backupDestinationDirectory, "Database.Document"), RavenJObject.FromObject(databaseDocument).ToString());
OperationFinished();
}
catch (AggregateException e)
{
var ne = e.ExtractSingleInnerException();
log.ErrorException("Failed to complete backup", ne);
UpdateBackupStatus("Failed to complete backup because: " + ne.Message, BackupStatus.BackupMessageSeverity.Error);
}
catch (Exception e)
{
log.ErrorException("Failed to complete backup", e);
UpdateBackupStatus("Failed to complete backup because: " + e.Message, BackupStatus.BackupMessageSeverity.Error);
}
finally
{
CompleteBackup();
}
}
private void FileCopy(string src, string dest, long size, ProgressNotifier notifier)
{
var buffer = new byte[16 * 1024];
var initialSize = size;
using (var srcStream = File.Open(src,FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
if (File.Exists(dest))
File.SetAttributes(dest,FileAttributes.Normal);
using (var destStream = File.Create(dest, buffer.Length))
{
while (true)
{
var read = srcStream.Read(buffer, 0, (int)Math.Min(buffer.Length, size));
notifier.UpdateProgress(read, Notify);
if (read == 0)
break;
size -= read;
destStream.Write(buffer, 0, read);
}
destStream.Flush();
}
}
}
public void Execute()
{
try
{
log.Info("Starting backup of '{0}' to '{1}'", backupSourceDirectory, backupDestinationDirectory);
UpdateBackupStatus(
string.Format("Started backup process. Backing up data to directory = '{0}'",
backupDestinationDirectory), null, BackupStatus.BackupMessageSeverity.Informational);
EnsureBackupDestinationExists();
if (incrementalBackup)
{
var incrementalBackupState = Path.Combine(backupDestinationDirectory, Constants.IncrementalBackupState);
if (File.Exists(incrementalBackupState))
{
var state = RavenJObject.Parse(File.ReadAllText(incrementalBackupState)).JsonDeserialization<IncrementalBackupState>();
if(state.ResourceId != database.TransactionalStorage.Id)
throw new InvalidOperationException(string.Format("Can't perform an incremental backup to a given folder because it already contains incremental backup data of different database. Existing incremental data origins from '{0}' database.", state.ResourceName));
}
else
{
var state = new IncrementalBackupState()
{
ResourceId = database.TransactionalStorage.Id,
ResourceName = database.Name ?? Constants.SystemDatabase
};
File.WriteAllText(incrementalBackupState, RavenJObject.FromObject(state).ToString());
}
if (CanPerformIncrementalBackup())
{
backupDestinationDirectory = DirectoryForIncrementalBackup();
}
else
{
incrementalBackup = false; // destination wasn't detected as a backup folder, automatically revert to a full backup if incremental was specified
}
}
else if (BackupAlreadyExists)
{
throw new InvalidOperationException("Denying request to perform a full backup to an existing backup folder. Try doing an incremental backup instead.");
}
UpdateBackupStatus(string.Format("Backing up indexes.."), null, BackupStatus.BackupMessageSeverity.Informational);
// Make sure we have an Indexes folder in the backup location
if (!Directory.Exists(Path.Combine(backupDestinationDirectory, "Indexes")))
Directory.CreateDirectory(Path.Combine(backupDestinationDirectory, "Indexes"));
var directoryBackups = new List<DirectoryBackup>
{
new DirectoryBackup(Path.Combine(backupSourceDirectory, "IndexDefinitions"),
Path.Combine(backupDestinationDirectory, "IndexDefinitions"),
Path.Combine(backupSourceDirectory, "Temp" + Guid.NewGuid().ToString("N")), incrementalBackup)
};
database.IndexStorage.Backup(backupDestinationDirectory,null, UpdateBackupStatus);
var progressNotifier = new ProgressNotifier();
foreach (var directoryBackup in directoryBackups)
{
directoryBackup.Notify += UpdateBackupStatus;
var backupSize = directoryBackup.Prepare();
progressNotifier.TotalBytes += backupSize;
}
foreach (var directoryBackup in directoryBackups)
{
directoryBackup.Execute(progressNotifier);
}
UpdateBackupStatus(string.Format("Finished indexes backup. Executing data backup.."), null, BackupStatus.BackupMessageSeverity.Informational);
ExecuteBackup(backupDestinationDirectory, incrementalBackup);
if (databaseDocument != null)
File.WriteAllText(Path.Combine(backupDestinationDirectory, Constants.DatabaseDocumentFilename), RavenJObject.FromObject(databaseDocument).ToString());
OperationFinished();
}
catch (AggregateException e)
{
var ne = e.ExtractSingleInnerException();
log.ErrorException("Failed to complete backup", ne);
UpdateBackupStatus("Failed to complete backup because: " + ne.Message, ne.ExceptionToString(null), BackupStatus.BackupMessageSeverity.Error);
}
catch (Exception e)
{
log.ErrorException("Failed to complete backup", e);
UpdateBackupStatus("Failed to complete backup because: " + e.Message, e.ExceptionToString(null), BackupStatus.BackupMessageSeverity.Error);
}
finally
{
CompleteBackup();
}
}
