private async void ExecuteMoveDatabaseCommand()
{
var result = await ViewServices.Execute <IMoveDatabaseService, MoveDatabaseResult>();
if (string.IsNullOrWhiteSpace(result.Path))
{
return;
}
if (result.OverwriteExisting || !File.Exists(result.Path))
{
await ViewServices.Execute <IProgressService>(new ProgressServiceArgs( report =>
{
SQLiteBackupCallback callback =
(source, sourceName, destination, destinationName, pages, remainingPages, totalPages, retry) =>
{
report.SetProgress(totalPages - remainingPages, totalPages);
return(true);
};
SQLiteConnectionStringBuilder sb = new SQLiteConnectionStringBuilder
{
DataSource = result.Path
};
using (SQLiteConnection destConnection = new SQLiteConnection(sb.ToString()))
{
destConnection.Open();
var connection = App.Session.Connection as SQLiteConnection;
Debug.Assert(connection != null, "connection != null");
connection.BackupDatabase(destConnection, "main", "main", -1, callback, 100);
}
} ));
}
Settings.Set(SettingKeys.DatabasePath, result.Path);
Application.Current.Shutdown();
Process.Start(Assembly.GetExecutingAssembly().Location);
}
///////////////////////////////////////////////////////////////////////////////////////////////
#region Backup API Members
/// <summary>
/// Backs up the database, using the specified database connection as the
/// destination.
/// </summary>
/// <param name="destination">The destination database connection.</param>
/// <param name="destinationName">The destination database name.</param>
/// <param name="sourceName">The source database name.</param>
/// <param name="pages">
/// The number of pages to copy or negative to copy all remaining pages.
/// </param>
/// <param name="callback">
/// The method to invoke between each step of the backup process. This
/// parameter may be null (i.e. no callbacks will be performed).
/// </param>
/// <param name="retryMilliseconds">
/// The number of milliseconds to sleep after encountering a locking error
/// during the backup process. A value less than zero means that no sleep
/// should be performed.
/// </param>
public void BackupDatabase(
SQLiteConnection destination,
string destinationName,
string sourceName,
int pages,
SQLiteBackupCallback callback,
int retryMilliseconds
)
{
CheckDisposed();
if (_connectionState != ConnectionState.Open)
throw new InvalidOperationException(
"Source database is not open.");
if (destination == null)
throw new ArgumentNullException("destination");
if (destination._connectionState != ConnectionState.Open)
throw new ArgumentException(
"Destination database is not open.", "destination");
if (destinationName == null)
throw new ArgumentNullException("destinationName");
if (sourceName == null)
throw new ArgumentNullException("sourceName");
SQLiteBase sqliteBase = _sql;
if (sqliteBase == null)
throw new InvalidOperationException(
"Connection object has an invalid handle.");
SQLiteBackup backup = null;
try
{
backup = sqliteBase.InitializeBackup(
destination, destinationName, sourceName); /* throw */
bool retry;
while (sqliteBase.StepBackup(backup, pages, out retry)) /* throw */
{
//
// NOTE: If a callback was supplied by our caller, call it.
// If it returns false, halt the backup process.
//
if ((callback != null) && !callback(this, sourceName,
destination, destinationName, pages,
sqliteBase.RemainingBackup(backup),
sqliteBase.PageCountBackup(backup), retry))
{
break;
}
//
// NOTE: If we need to retry the previous operation, wait for
// the number of milliseconds specified by our caller
// unless the caller used a negative number, in that case
// skip sleeping at all because we do not want to block
// this thread forever.
//
if (retry && (retryMilliseconds >= 0))
System.Threading.Thread.Sleep(retryMilliseconds);
//
// NOTE: There is no point in calling the native API to copy
// zero pages as it does nothing; therefore, stop now.
//
if (pages == 0)
break;
}
}
#if !PLATFORM_COMPACTFRAMEWORK
catch (Exception e)
{
if ((_flags & SQLiteConnectionFlags.LogBackup) == SQLiteConnectionFlags.LogBackup)
{
SQLiteLog.LogMessage(0, String.Format(
"Caught exception while backing up database: {0}", e));
}
throw;
}
#endif
finally
{
if (backup != null)
sqliteBase.FinishBackup(backup); /* throw */
}
}
/// <summary>Backs up the database, using the specified database connection as the destination.</summary>
/// <param name="destination">The destination database connection.</param>
/// <param name="destinationName">The destination database name (usually <c>"main"</c>).</param>
/// <param name="sourceName">The source database name (usually <c>"main"</c>).</param>
/// <param name="pages">The number of pages to copy, or negative to copy all remaining pages.</param>
/// <param name="callback">The method to invoke between each step of the backup process. This
/// parameter may be <c>null</c> (i.e., no callbacks will be performed).</param>
/// <param name="retryMilliseconds">The number of milliseconds to sleep after encountering a locking error
/// during the backup process. A value less than zero means that no sleep should be performed.</param>
public void BackupDatabase(SQLiteConnection destination, string destinationName, string sourceName, int pages, SQLiteBackupCallback callback, int retryMilliseconds)
{
VerifyNotDisposed();
if (m_connectionState != ConnectionState.Open)
{
throw new InvalidOperationException("Source database is not open.");
}
if (destination == null)
{
throw new ArgumentNullException("destination");
}
if (destination.m_connectionState != ConnectionState.Open)
{
throw new ArgumentException("Destination database is not open.", "destination");
}
if (destinationName == null)
{
throw new ArgumentNullException("destinationName");
}
if (sourceName == null)
{
throw new ArgumentNullException("sourceName");
}
if (pages == 0)
{
throw new ArgumentException("pages must not be 0.", "pages");
}
using (SqliteBackupHandle backup = NativeMethods.sqlite3_backup_init(destination.m_db, ToNullTerminatedUtf8(destinationName), m_db, ToNullTerminatedUtf8(sourceName)))
{
if (backup == null)
{
throw new SQLiteException(NativeMethods.sqlite3_errcode(m_db), m_db);
}
while (true)
{
SQLiteErrorCode error = NativeMethods.sqlite3_backup_step(backup, pages);
if (error == SQLiteErrorCode.Done)
{
break;
}
else if (error == SQLiteErrorCode.Ok || error == SQLiteErrorCode.Busy || error == SQLiteErrorCode.Locked)
{
bool retry = error != SQLiteErrorCode.Ok;
if (callback != null && !callback(this, sourceName, destination, destinationName, pages, NativeMethods.sqlite3_backup_remaining(backup), NativeMethods.sqlite3_backup_pagecount(backup), retry))
{
break;
}
if (retry && retryMilliseconds > 0)
{
Thread.Sleep(retryMilliseconds);
}
}
else
{
throw new SQLiteException(error, m_db);
}
}
}
}
public void BackupDatabase(SQLiteConnection destination, string destinationName, string sourceName, int pages = -1, SQLiteBackupCallback callback = null, int retryMilliseconds = -1)
{
MakeConnection(connection =>
{
connection.BackupDatabase(destination, destinationName, sourceName, pages, callback, retryMilliseconds);
return(true);
});
}
/// <summary>Backs up the database, using the specified database connection as the destination.</summary>
/// <param name="destination">The destination database connection.</param>
/// <param name="destinationName">The destination database name (usually <c>"main"</c>).</param>
/// <param name="sourceName">The source database name (usually <c>"main"</c>).</param>
/// <param name="pages">The number of pages to copy, or negative to copy all remaining pages.</param>
/// <param name="callback">The method to invoke between each step of the backup process. This
/// parameter may be <c>null</c> (i.e., no callbacks will be performed).</param>
/// <param name="retryMilliseconds">The number of milliseconds to sleep after encountering a locking error
/// during the backup process. A value less than zero means that no sleep should be performed.</param>
public void BackupDatabase(SQLiteConnection destination, string destinationName, string sourceName, int pages, SQLiteBackupCallback callback, int retryMilliseconds)
{
VerifyNotDisposed();
if (m_connectionState != ConnectionState.Open)
throw new InvalidOperationException("Source database is not open.");
if (destination == null)
throw new ArgumentNullException("destination");
if (destination.m_connectionState != ConnectionState.Open)
throw new ArgumentException("Destination database is not open.", "destination");
if (destinationName == null)
throw new ArgumentNullException("destinationName");
if (sourceName == null)
throw new ArgumentNullException("sourceName");
if (pages == 0)
throw new ArgumentException("pages must not be 0.", "pages");
using (SqliteBackupHandle backup = NativeMethods.sqlite3_backup_init(destination.m_db, ToNullTerminatedUtf8(destinationName), m_db, ToNullTerminatedUtf8(sourceName)))
{
if (backup == null)
throw new SQLiteException(NativeMethods.sqlite3_errcode(m_db), m_db);
while (true)
{
SQLiteErrorCode error = NativeMethods.sqlite3_backup_step(backup, pages);
if (error == SQLiteErrorCode.Done)
{
break;
}
else if (error == SQLiteErrorCode.Ok || error == SQLiteErrorCode.Busy || error == SQLiteErrorCode.Locked)
{
bool retry = error != SQLiteErrorCode.Ok;
if (callback != null && !callback(this, sourceName, destination, destinationName, pages, NativeMethods.sqlite3_backup_remaining(backup), NativeMethods.sqlite3_backup_pagecount(backup), retry))
break;
if (retry && retryMilliseconds > 0)
Thread.Sleep(retryMilliseconds);
}
else
{
throw new SQLiteException(error, m_db);
}
}
}
}
