public void Execute(Db db, MetaItem db_version)
{
code();
Console.WriteLine("Updated database from version {0} to {1}",
db_version.Value,
Version.ToString());
db_version.Value = Version.ToString();
db.Meta.Commit(db_version);
}
public static void Run(Db database)
{
db = database;
db_version = db.Meta.DatabaseVersion;
if (updates.Count == 0)
{
return;
}
Version current_version = new Version(db_version.Value);
if (current_version == LatestVersion)
{
return;
}
else if (current_version > LatestVersion)
{
Console.WriteLine("The existing database version is more recent than this version of F-Spot expects.");
return;
}
Console.WriteLine("Updating F-Spot Database");
// Only create and show the dialog if one or more of the updates to be done is
// marked as being slow
bool slow = false;
foreach (Version version in updates.Keys)
{
if (version > current_version && (updates[version] as Update).IsSlow)
{
slow = true;
}
break;
}
if (slow)
{
dialog = new ProgressDialog(Catalog.GetString("Updating F-Spot Database"), ProgressDialog.CancelButtonType.None, 0, null);
dialog.Message.Text = Catalog.GetString("Please wait while your F-Spot gallery's database is updated. This may take some time.");
dialog.Bar.Fraction = 0.0;
dialog.Modal = false;
dialog.SkipTaskbarHint = true;
dialog.WindowPosition = WindowPosition.Center;
dialog.ShowAll();
dialog.Present();
dialog.QueueDraw();
}
db.BeginTransaction();
try {
ArrayList keys = new ArrayList(updates.Keys);
keys.Sort();
foreach (Version version in keys)
{
if (version <= current_version)
{
continue;
}
Pulse();
(updates[version] as Update).Execute(db, db_version);
}
db.CommitTransaction();
} catch (Exception e) {
Console.WriteLine("Rolling back database changes because of Exception");
// There was an error, roll back the database
db.RollbackTransaction();
// Pass the exception on, this is fatal
throw e;
}
if (dialog != null)
{
dialog.Destroy();
}
if (new Version(db_version.Value) == LatestVersion)
{
Console.WriteLine("Database updates completed successfully.");
}
}