public void DetermineOperation()
{
if (migratorName == "")
{
return;
}
executed = false;
Version currentVersion = genericData.GetUniverseVersion(migratorName);
//if there is no Universe version, this is likely an entirely new installation
if (currentVersion == null)
{
MainConsole.Instance.InfoFormat("[Migrator]: Clean installation for {0} found", migratorName);
Migrator defaultMigrator = GetHighestVersionMigratorThatCanProvideDefaultSetup();
currentVersion = defaultMigrator.Version;
Migrator startMigrator = GetMigratorAfterVersion(defaultMigrator.Version);
var latestMigrator = GetLatestVersionMigrator();
Migrator targetMigrator = defaultMigrator == latestMigrator ? null : latestMigrator;
operationDescription =
new MigrationOperationDescription(MigrationOperationTypes.CreateDefaultAndUpgradeToTarget,
currentVersion,
startMigrator != null ? startMigrator.Version : null,
targetMigrator != null ? targetMigrator.Version : null);
}
else
{
Migrator startMigrator = GetMigratorAfterVersion(currentVersion);
if (startMigrator != null)
{
Migrator targetMigrator = GetLatestVersionMigrator();
MainConsole.Instance.InfoFormat("[Migrator]: New migration script for {0} found", migratorName);
MainConsole.Instance.CleanInfoFormat(" Depending upon the amount of {0} data, this process may take quite a while", migratorName);
MainConsole.Instance.CleanInfo(" You may also see warnings and possible timeout errors until this proccess is completed");
MainConsole.Instance.CleanInfo("");
operationDescription = new MigrationOperationDescription(MigrationOperationTypes.UpgradeToTarget,
currentVersion, startMigrator.Version,
targetMigrator.Version);
}
else
{
operationDescription = new MigrationOperationDescription(MigrationOperationTypes.DoNothing,
currentVersion);
}
}
}
public void DetermineOperation()
{
if (migratorName == "")
{
return;
}
executed = false;
Version currentVersion = genericData.GetUniverseVersion(migratorName);
//if there is no Universe version, this is likely an entirely new installation
if (currentVersion == null)
{
Migrator defaultMigrator = GetHighestVersionMigratorThatCanProvideDefaultSetup();
currentVersion = defaultMigrator.Version;
Migrator startMigrator = GetMigratorAfterVersion(defaultMigrator.Version);
var latestMigrator = GetLatestVersionMigrator();
Migrator targetMigrator = defaultMigrator == latestMigrator ? null : latestMigrator;
operationDescription =
new MigrationOperationDescription(MigrationOperationTypes.CreateDefaultAndUpgradeToTarget,
currentVersion,
startMigrator != null ? startMigrator.Version : null,
targetMigrator != null ? targetMigrator.Version : null);
}
else
{
Migrator startMigrator = GetMigratorAfterVersion(currentVersion);
if (startMigrator != null)
{
Migrator targetMigrator = GetLatestVersionMigrator();
operationDescription = new MigrationOperationDescription(MigrationOperationTypes.UpgradeToTarget,
currentVersion, startMigrator.Version,
targetMigrator.Version);
}
else
{
operationDescription = new MigrationOperationDescription(MigrationOperationTypes.DoNothing,
currentVersion);
}
}
}
public void ExecuteOperation()
{
if (migratorName == "")
{
return;
}
if (operationDescription != null && !executed &&
operationDescription.OperationType != MigrationOperationTypes.DoNothing)
{
Migrator currentMigrator = GetMigratorByVersion(operationDescription.CurrentVersion);
//if we are creating default, do it now
if (operationDescription.OperationType == MigrationOperationTypes.CreateDefaultAndUpgradeToTarget)
{
try
{
currentMigrator.CreateDefaults(genericData);
}
catch
{
}
executed = true;
}
//lets first validate where we think we are
bool validated = currentMigrator != null && currentMigrator.Validate(genericData);
if (!validated && validateTables && currentMigrator != null)
{
//Try rerunning the migrator and then the validation
//prepare restore point if something goes wrong
MainConsole.Instance.Fatal(string.Format("[Migrator]: Failed to validate migration {0}-{1}, retrying...",
currentMigrator.MigrationName, currentMigrator.Version));
currentMigrator.Migrate(genericData);
validated = currentMigrator.Validate(genericData);
if (!validated)
{
SchemaDefinition rec;
currentMigrator.DebugTestThatAllTablesValidate(genericData, out rec);
MainConsole.Instance.Fatal(string.Format(
"[Migrator]: FAILED TO REVALIDATE MIGRATION {0}-{1}, FIXING TABLE FORCIBLY... NEW TABLE NAME {2}",
currentMigrator.MigrationName,
currentMigrator.Version,
rec.Name + "_broken"
));
genericData.RenameTable(rec.Name, rec.Name + "_broken");
currentMigrator.Migrate(genericData);
validated = currentMigrator.Validate(genericData);
if (!validated)
{
throw new MigrationOperationException(string.Format(
"[Migrator]: Current version {0}-{1} did not validate. Stopping here so we don't cause any trouble. No changes were made.",
currentMigrator.MigrationName,
currentMigrator.Version
));
}
}
}
//else
// MainConsole.Instance.Fatal (string.Format ("Failed to validate migration {0}-{1}, continueing...", currentMigrator.MigrationName, currentMigrator.Version));
bool restoreTaken = false;
//Loop through versions from start to end, migrating then validating
Migrator executingMigrator = GetMigratorByVersion(operationDescription.StartVersion);
//only restore if we are going to do something
if (executingMigrator != null)
{
if (validateTables && currentMigrator != null)
{
//prepare restore point if something goes wrong
restorePoint = currentMigrator.PrepareRestorePoint(genericData);
restoreTaken = true;
}
}
while (executingMigrator != null)
{
try
{
executingMigrator.Migrate(genericData);
}
catch (Exception ex)
{
if (currentMigrator != null)
{
throw new MigrationOperationException(string.Format("[Migrator]: Migrating to version {0} failed, {1}.",
currentMigrator.Version, ex));
}
}
executed = true;
validated = executingMigrator.Validate(genericData);
//if it doesn't validate, rollback
if (!validated && validateTables)
{
RollBackOperation();
if (currentMigrator != null)
{
throw new MigrationOperationException(
string.Format("[Migrator]: Migrating to version {0} did not validate. Restoring to restore point.",
currentMigrator.Version));
}
}
else
{
executingMigrator.FinishedMigration(genericData);
}
if (executingMigrator.Version == operationDescription.EndVersion)
{
break;
}
executingMigrator = GetMigratorAfterVersion(executingMigrator.Version);
}
if (restoreTaken)
{
currentMigrator.ClearRestorePoint(genericData);
}
}
}