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(* |
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* IBX For Lazarus (Firebird Express) |
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* |
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* The contents of this file are subject to the Initial Developer's |
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* Public License Version 1.0 (the "License"); you may not use this |
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* file except in compliance with the License. You may obtain a copy |
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* of the License here: |
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* |
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* http://www.firebirdsql.org/index.php?op=doc&id=idpl |
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* |
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* Software distributed under the License is distributed on an "AS |
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or |
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* implied. See the License for the specific language governing rights |
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* and limitations under the License. |
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* |
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* The Initial Developer of the Original Code is Tony Whyman. |
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* |
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* The Original Code is (C) 2014 Tony Whyman, MWA Software |
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* (http://www.mwasoftware.co.uk). |
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* |
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* All Rights Reserved. |
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* |
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* Contributor(s): ______________________________________. |
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* |
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*) |
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unit IBCMLocalDBSupport; |
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|
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{$mode objfpc}{$H+} |
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|
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interface |
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|
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uses |
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Classes, SysUtils, IBXCustomIBLocalDBSupport, ibxscript, IBXServices; |
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|
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type |
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TOnLogMessage = procedure(Sender: TObject; Msg: string) of object; |
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|
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{ TIBCMLocalDBSupport } |
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|
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TIBCMLocalDBSupport = class(TCustomIBLocalDBSupport) |
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private |
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FOnLogMessage: TOnLogMessage; |
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FOnProgressEvent: TOnProgressEvent; |
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function DoUpgrade(IBXScript: TIBXScript; TargetVersionNo: integer): boolean; |
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procedure WriteLog(Msg: string); |
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procedure HandleOnGetNextLine(Sender: TObject; var Line: string); |
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procedure IBXScriptCreateDatabase(Sender: TObject; |
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var DatabaseFileName: string); |
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protected |
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procedure Add2Log(Sender: TObject; Msg: string); override; |
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procedure Downgrade(DBArchive: string); override; |
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function InternalCreateNewDatabase(DBArchive: string): boolean; override; |
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function RestoreDatabaseFromArchive(aFilename: string): boolean; override; |
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function RunUpgradeDatabase(TargetVersionNo: integer): boolean; override; |
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function SaveDatabaseToArchive( aFilename: string): boolean; override; |
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public |
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constructor Create(aOwner: TComponent); override; |
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property OnLogMessage: TOnLogMessage read FOnLogMessage write FOnLogMessage; |
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property OnProgressEvent: TOnProgressEvent read FOnProgressEvent write FOnProgressEvent; {Progress Bar Support} |
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end; |
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|
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implementation |
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|
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uses IBXUpgradeConfFile, IBDatabase; |
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|
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resourcestring |
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sUpdateMsg = 'Applying Update from %s'; |
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sCreatingDatabase = 'Creating new Database'; |
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sBackupDone = 'Database Archived to %s'; |
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|
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{ TIBCMLocalDBSupport } |
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|
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procedure TIBCMLocalDBSupport.Add2Log(Sender: TObject; Msg: string); |
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begin |
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WriteLog(Msg); |
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end; |
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|
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function TIBCMLocalDBSupport.DoUpgrade(IBXScript: TIBXScript; |
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TargetVersionNo: integer): boolean; |
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var UpdateAvailable: boolean; |
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UpgradeInfo: TUpgradeInfo; |
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DBArchive: string; |
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LastVersionNo: integer; |
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begin |
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repeat |
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if CurrentDBVersionNo >= TargetVersionNo then break; |
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LastVersionNo := CurrentDBVersionNo; |
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UpdateAvailable := UpgradeConf.GetUpgradeInfo(SectionHeaderTemplate,CurrentDBVersionNo+1,UpgradeInfo); |
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if UpdateAvailable then |
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begin |
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if UpgradeInfo.BackupDB then |
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begin |
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DBArchive := ChangeFileExt(ActiveDatabasePathName,''); |
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DBArchive := DBArchive + '.' + IntToStr(CurrentDBVersionNo) + '.gbk'; |
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SaveDatabaseToArchive(DBArchive); |
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end; |
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Add2Log(self,UpgradeInfo.UserMessage); |
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Add2Log(self,Format(sUpdateMsg,[UpgradeInfo.UpdateSQLFile])); |
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Result := IBXScript.RunScript(UpgradeInfo.UpdateSQLFile); |
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if not Result then |
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break; |
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UpdateVersionNo; |
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end; |
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until not UpdateAvailable or (LastVersionNo = CurrentDBVersionNo); |
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end; |
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|
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procedure TIBCMLocalDBSupport.WriteLog(Msg: string); |
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begin |
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if assigned(OnLogMessage) then |
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OnLogMessage(self,Msg); |
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end; |
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|
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procedure TIBCMLocalDBSupport.HandleOnGetNextLine(Sender: TObject; |
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var Line: string); |
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begin |
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if assigned(OnLogMessage) then |
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OnLogMessage(self,Line); |
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end; |
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|
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procedure TIBCMLocalDBSupport.IBXScriptCreateDatabase(Sender: TObject; |
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var DatabaseFileName: string); |
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begin |
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DatabaseFileName := (Sender as TIBXScript).Database.Attachment.GetConnectString; |
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(Sender as TIBXScript).Database.DropDatabase; |
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end; |
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|
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procedure TIBCMLocalDBSupport.Downgrade(DBArchive: string); |
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begin |
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inherited; |
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RestoreDatabase(DBArchive); |
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DowngradeDone; |
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end; |
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|
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function TIBCMLocalDBSupport.InternalCreateNewDatabase(DBArchive: string |
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): boolean; |
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begin |
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Result := true; |
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if IsGbakFile(DBArchive) then |
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begin |
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with RestoreService do |
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begin |
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BackupFiles.Clear; |
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BackupFiles.Add(DBArchive); |
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Options := [Replace]; |
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WriteLog(sCreatingDatabase); |
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Database.Attachment.Disconnect; |
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try |
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Execute(nil); |
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finally |
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Database.Attachment.Connect; |
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end; |
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end; |
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end |
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else |
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with TIBXScript.Create(self) do |
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try |
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Database := self.Database; |
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OnCreateDatabase := @IBXScriptCreateDatabase; |
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OnProgressEvent := FOnProgressEvent; |
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WriteLog(sCreatingDatabase); |
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Result := RunScript(DBArchive); |
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Add2Log(self,''); {ensure EOL sent} |
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finally |
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Free |
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end |
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end; |
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|
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function TIBCMLocalDBSupport.RestoreDatabaseFromArchive( |
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aFilename: string): boolean; |
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begin |
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Result := true; |
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with RestoreService do |
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begin |
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BackupFiles.Clear; |
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BackupFiles.Add(aFilename); |
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DatabaseFiles.Clear; |
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DatabaseFiles.Add(Database.DatabaseName); |
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Options := [Replace]; |
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Execute(nil); |
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end; |
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end; |
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|
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function TIBCMLocalDBSupport.RunUpgradeDatabase(TargetVersionNo: integer |
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): boolean; |
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var IBXScript: TIBXScript; |
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begin |
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IBXScript := TIBXScript.Create(self); |
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try |
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IBXScript.Database := Database; |
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IBXScript.OnErrorLog := @Add2Log; |
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IBXScript.OnOutputLog := @Add2Log; |
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if assigned(UpgradeConf) then |
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IBXScript.GetParamValue := @UpgradeConf.GetParamValue; |
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Result := DoUpgrade(IBXScript, TargetVersionNo); |
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finally |
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IBXScript.Free; |
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end; |
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|
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end; |
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|
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function TIBCMLocalDBSupport.SaveDatabaseToArchive(aFilename: string): boolean; |
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begin |
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Result := true; |
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with BackupService do |
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begin |
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DatabaseName := Database.DatabaseName; |
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BackupFiles.Clear; |
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BackupFiles.Add(aFileName); |
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Execute(nil); |
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WriteLog(Format(sBackupDone,[aFileName])); |
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end; |
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end; |
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|
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constructor TIBCMLocalDBSupport.Create(aOwner: TComponent); |
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begin |
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inherited Create(aOwner); |
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RestoreService.OnGetNextLine := @HandleOnGetNextLine; |
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BackupService.OnGetNextLine := @HandleOnGetNextLine; |
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end; |
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|
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end. |
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|
