examples/services/ShutdownDatabaseDlgUnit.pas

(*
 *  IBX For Lazarus (Firebird Express)
 *
 *  The contents of this file are subject to the Initial Developer's
 *  Public License Version 1.0 (the "License"); you may not use this
 *  file except in compliance with the License. You may obtain a copy
 *  of the License here:
 *
 *    http://www.firebirdsql.org/index.php?op=doc&id=idpl
 *
 *  Software distributed under the License is distributed on an "AS
 *  IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 *  implied. See the License for the specific language governing rights
 *  and limitations under the License.
 *
 *  The Initial Developer of the Original Code is Tony Whyman.
 *
 *  The Original Code is (C) 2015 Tony Whyman, MWA Software
 *  (http://www.mwasoftware.co.uk).
 *
 *  All Rights Reserved.
 *
 *  Contributor(s): ______________________________________.
 *
*) 
            
unit ShutdownDatabaseDlgUnit;

{$mode objfpc}{$H+}

interface

uses
  Classes, SysUtils, FileUtil, Forms, Controls, Graphics, Dialogs, StdCtrls,
  ComCtrls, ExtCtrls, IBXServices, IB;

type

  { TShutdownDatabaseDlg }

  TShutdownDatabaseDlg = class(TForm)
    Bevel1: TBevel;
    CloseBtn: TButton;
    IBConfigService: TIBXConfigService;
    ProgressBar1: TProgressBar;
    StatusMsg: TLabel;
    procedure CloseBtnClick(Sender: TObject);
    procedure FormShow(Sender: TObject);
  private
    FShutDownmode: TDBShutdownMode;
    FDelay: integer;
    FAborting: boolean;
    FSecContextError: boolean;
    FShutdownWaitThread: TThread;
    procedure OnWaitCompleted(Sender: TObject);
  public
     procedure Shutdown(aDBName: string; aShutDownmode: TDBShutdownMode; aDelay: integer);
     property Aborting: boolean read FAborting;
  end;

var
  ShutdownDatabaseDlg: TShutdownDatabaseDlg;

implementation

{$R *.lfm}

resourcestring
  sWaitStatusMsg = 'Waiting for %s to shutdown';
  sDatabaseShutdown  = 'Database has been successfully shutdown';
  sOnCompleted = 'Shutdown of %s completed with response: %s';

type
    { TShutdownWaitThread }

  TShutdownWaitThread = class(TThread)
  private
    FErrorMessage: string;
    FIBConfigService: TIBXConfigService;
    FOptions: TDBShutdownMode;
    FSecContextError: boolean;
    FSuccess: boolean;
    FWait: integer;
    FOnCompleted: TNotifyEvent;
    procedure DoCallback;
  protected
    procedure Execute; override;
  public
    constructor Create(aService: TIBXConfigService; Options: TDBShutdownMode;
      Wait: Integer; OnCompleted: TNotifyEvent);
    destructor Destroy; override;
    procedure Abort;
    property Success: boolean read FSuccess;
    property SecContextError: boolean read FSecContextError;
    property ErrorMessage: string read FErrorMessage;
  end;


{ TShutdownWaitThread }

procedure TShutdownWaitThread.DoCallback;
begin
  if assigned(FOnCompleted) then
    FOnCompleted(self);
end;

procedure TShutdownWaitThread.Execute;
begin
  FSuccess := false;
  try
    try
      FIBConfigService.ShutDownDatabase(FOptions,FWait);
      FErrorMessage := 'Completed without error';
      FSuccess := true;
    except
      on E: Exception do
        FErrorMessage := E.Message;
    end;
  finally
    if Terminated and FSuccess then
      FIBConfigService.BringDatabaseOnline;
  end;
  Synchronize(@DoCallback);
end;

constructor TShutdownWaitThread.Create(aService: TIBXConfigService;
  Options: TDBShutdownMode; Wait: Integer; OnCompleted: TNotifyEvent);
begin
  inherited Create(false);
  FOptions := Options;
  FWait := Wait;
  FOnCompleted := OnCompleted;
  FreeOnTerminate := true;
  FIBConfigService := TIBXConfigService.Create(nil);
  FIBConfigService.ServicesConnection := aService.ServicesConnection;
  FIBConfigService.DatabaseName := aService.DatabaseNAme;
end;

destructor TShutdownWaitThread.Destroy;
begin
  if FIBConfigService <> nil then FIBConfigService.Free;
  inherited Destroy;
end;

procedure TShutdownWaitThread.Abort;
begin
  Terminate;
end;

{ TShutdownDatabaseDlg }

procedure TShutdownDatabaseDlg.FormShow(Sender: TObject);
begin
  FAborting := false;
  StatusMsg.Caption := Format(sWaitStatusMsg,[IBConfigService.DatabaseName]);
  FShutdownWaitThread := TShutdownWaitThread.Create(IBConfigService,FShutDownMode,FDelay,@OnWaitCompleted);
end;

procedure TShutdownDatabaseDlg.CloseBtnClick(Sender: TObject);
begin
  FAborting := true;
  FShutdownWaitThread.Terminate;
  Close;
end;

procedure TShutdownDatabaseDlg.OnWaitCompleted(Sender: TObject);
begin
  with TShutdownWaitThread(Sender) do
    if not FAborting then
      MessageDlg(Format(sOnCompleted,[IBConfigService.DatabaseName,ErrorMessage]),
               mtInformation,[mbOK],0);
  FAborting := false;
  Close;
end;

procedure TShutdownDatabaseDlg.Shutdown(aDBName: string;
  aShutDownmode: TDBShutdownMode; aDelay: integer);
begin
  IBConfigService.DatabaseName := aDBName;
  FShutDownmode := aShutDownmode;
  FDelay := aDelay;
  FSecContextError := false;
  if aDelay <= 0 then
  begin
      IBConfigService.ShutDownDatabase(aShutDownmode,0);
      MessageDlg(sDatabaseShutdown,mtInformation,[mbOK],0);
  end
  else
    ShowModal;
end;

end.

Revision:	209
Committed:	Wed Mar 14 12:48:51 2018 UTC (6 years, 1 month ago) by tony
Content type:	text/x-pascal
File size:	5067 byte(s)
Log Message:	Fixes Merged
#	User	Rev	Content
1	tony	143	(*
2			* IBX For Lazarus (Firebird Express)
3			*
4			* The contents of this file are subject to the Initial Developer's
5			* Public License Version 1.0 (the "License"); you may not use this
6			* file except in compliance with the License. You may obtain a copy
7			* of the License here:
8			*
9			* http://www.firebirdsql.org/index.php?op=doc&id=idpl
10			*
11			* Software distributed under the License is distributed on an "AS
12			* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
13			* implied. See the License for the specific language governing rights
14			* and limitations under the License.
15			*
16			* The Initial Developer of the Original Code is Tony Whyman.
17			*
18			* The Original Code is (C) 2015 Tony Whyman, MWA Software
19			* (http://www.mwasoftware.co.uk).
20			*
21			* All Rights Reserved.
22			*
23			* Contributor(s): ______________________________________.
24			*
25			*)
26
27			unit ShutdownDatabaseDlgUnit;
28
29			{$mode objfpc}{$H+}
30
31			interface
32
33			uses
34			Classes, SysUtils, FileUtil, Forms, Controls, Graphics, Dialogs, StdCtrls,
35	tony	209	ComCtrls, ExtCtrls, IBXServices, IB;
36	tony	143
37			type
38
39			{ TShutdownDatabaseDlg }
40
41			TShutdownDatabaseDlg = class(TForm)
42			Bevel1: TBevel;
43			CloseBtn: TButton;
44	tony	209	IBConfigService: TIBXConfigService;
45	tony	143	ProgressBar1: TProgressBar;
46			StatusMsg: TLabel;
47			procedure CloseBtnClick(Sender: TObject);
48			procedure FormShow(Sender: TObject);
49			private
50	tony	209	FShutDownmode: TDBShutdownMode;
51	tony	143	FDelay: integer;
52			FAborting: boolean;
53			FSecContextError: boolean;
54			FShutdownWaitThread: TThread;
55			procedure OnWaitCompleted(Sender: TObject);
56			public
57	tony	209	procedure Shutdown(aDBName: string; aShutDownmode: TDBShutdownMode; aDelay: integer);
58	tony	143	property Aborting: boolean read FAborting;
59			end;
60
61			var
62			ShutdownDatabaseDlg: TShutdownDatabaseDlg;
63
64			implementation
65
66			{$R *.lfm}
67
68			resourcestring
69			sWaitStatusMsg = 'Waiting for %s to shutdown';
70			sDatabaseShutdown = 'Database has been successfully shutdown';
71			sOnCompleted = 'Shutdown of %s completed with response: %s';
72
73			type
74			{ TShutdownWaitThread }
75
76			TShutdownWaitThread = class(TThread)
77			private
78			FErrorMessage: string;
79	tony	209	FIBConfigService: TIBXConfigService;
80			FOptions: TDBShutdownMode;
81	tony	143	FSecContextError: boolean;
82			FSuccess: boolean;
83			FWait: integer;
84			FOnCompleted: TNotifyEvent;
85			procedure DoCallback;
86			protected
87			procedure Execute; override;
88			public
89	tony	209	constructor Create(aService: TIBXConfigService; Options: TDBShutdownMode;
90	tony	143	Wait: Integer; OnCompleted: TNotifyEvent);
91			destructor Destroy; override;
92			procedure Abort;
93			property Success: boolean read FSuccess;
94			property SecContextError: boolean read FSecContextError;
95			property ErrorMessage: string read FErrorMessage;
96			end;
97
98
99
100			{ TShutdownWaitThread }
101
102			procedure TShutdownWaitThread.DoCallback;
103			begin
104			if assigned(FOnCompleted) then
105			FOnCompleted(self);
106			end;
107
108			procedure TShutdownWaitThread.Execute;
109			begin
110			FSuccess := false;
111			try
112			try
113			FIBConfigService.ShutDownDatabase(FOptions,FWait);
114			FErrorMessage := 'Completed without error';
115			FSuccess := true;
116			except
117			on E: Exception do
118			FErrorMessage := E.Message;
119			end;
120			finally
121			if Terminated and FSuccess then
122			FIBConfigService.BringDatabaseOnline;
123			end;
124			Synchronize(@DoCallback);
125			end;
126
127	tony	209	constructor TShutdownWaitThread.Create(aService: TIBXConfigService;
128			Options: TDBShutdownMode; Wait: Integer; OnCompleted: TNotifyEvent);
129	tony	143	begin
130			inherited Create(false);
131			FOptions := Options;
132			FWait := Wait;
133			FOnCompleted := OnCompleted;
134			FreeOnTerminate := true;
135	tony	209	FIBConfigService := TIBXConfigService.Create(nil);
136			FIBConfigService.ServicesConnection := aService.ServicesConnection;
137	tony	143	FIBConfigService.DatabaseName := aService.DatabaseNAme;
138			end;
139
140			destructor TShutdownWaitThread.Destroy;
141			begin
142			if FIBConfigService <> nil then FIBConfigService.Free;
143			inherited Destroy;
144			end;
145
146			procedure TShutdownWaitThread.Abort;
147			begin
148			Terminate;
149			end;
150
151			{ TShutdownDatabaseDlg }
152
153			procedure TShutdownDatabaseDlg.FormShow(Sender: TObject);
154			begin
155			FAborting := false;
156			StatusMsg.Caption := Format(sWaitStatusMsg,[IBConfigService.DatabaseName]);
157			FShutdownWaitThread := TShutdownWaitThread.Create(IBConfigService,FShutDownMode,FDelay,@OnWaitCompleted);
158			end;
159
160			procedure TShutdownDatabaseDlg.CloseBtnClick(Sender: TObject);
161			begin
162			FAborting := true;
163			FShutdownWaitThread.Terminate;
164			Close;
165			end;
166
167			procedure TShutdownDatabaseDlg.OnWaitCompleted(Sender: TObject);
168			begin
169			with TShutdownWaitThread(Sender) do
170			if not FAborting then
171			MessageDlg(Format(sOnCompleted,[IBConfigService.DatabaseName,ErrorMessage]),
172			mtInformation,[mbOK],0);
173			FAborting := false;
174			Close;
175			end;
176
177	tony	209	procedure TShutdownDatabaseDlg.Shutdown(aDBName: string;
178			aShutDownmode: TDBShutdownMode; aDelay: integer);
179	tony	143	begin
180	tony	209	IBConfigService.DatabaseName := aDBName;
181	tony	143	FShutDownmode := aShutDownmode;
182			FDelay := aDelay;
183			FSecContextError := false;
184			if aDelay <= 0 then
185			begin
186			IBConfigService.ShutDownDatabase(aShutDownmode,0);
187	tony	209	MessageDlg(sDatabaseShutdown,mtInformation,[mbOK],0);
188	tony	143	end
189			else
190			ShowModal;
191			end;
192
193			end.
194