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, 8 months ago) by tony
Content type:	text/x-pascal
File size:	5067 byte(s)
Log Message:	Fixes Merged
#	Content
1	(*
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	ComCtrls, ExtCtrls, IBXServices, IB;
36
37	type
38
39	{ TShutdownDatabaseDlg }
40
41	TShutdownDatabaseDlg = class(TForm)
42	Bevel1: TBevel;
43	CloseBtn: TButton;
44	IBConfigService: TIBXConfigService;
45	ProgressBar1: TProgressBar;
46	StatusMsg: TLabel;
47	procedure CloseBtnClick(Sender: TObject);
48	procedure FormShow(Sender: TObject);
49	private
50	FShutDownmode: TDBShutdownMode;
51	FDelay: integer;
52	FAborting: boolean;
53	FSecContextError: boolean;
54	FShutdownWaitThread: TThread;
55	procedure OnWaitCompleted(Sender: TObject);
56	public
57	procedure Shutdown(aDBName: string; aShutDownmode: TDBShutdownMode; aDelay: integer);
58	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	FIBConfigService: TIBXConfigService;
80	FOptions: TDBShutdownMode;
81	FSecContextError: boolean;
82	FSuccess: boolean;
83	FWait: integer;
84	FOnCompleted: TNotifyEvent;
85	procedure DoCallback;
86	protected
87	procedure Execute; override;
88	public
89	constructor Create(aService: TIBXConfigService; Options: TDBShutdownMode;
90	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	constructor TShutdownWaitThread.Create(aService: TIBXConfigService;
128	Options: TDBShutdownMode; Wait: Integer; OnCompleted: TNotifyEvent);
129	begin
130	inherited Create(false);
131	FOptions := Options;
132	FWait := Wait;
133	FOnCompleted := OnCompleted;
134	FreeOnTerminate := true;
135	FIBConfigService := TIBXConfigService.Create(nil);
136	FIBConfigService.ServicesConnection := aService.ServicesConnection;
137	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	procedure TShutdownDatabaseDlg.Shutdown(aDBName: string;
178	aShutDownmode: TDBShutdownMode; aDelay: integer);
179	begin
180	IBConfigService.DatabaseName := aDBName;
181	FShutDownmode := aShutDownmode;
182	FDelay := aDelay;
183	FSecContextError := false;
184	if aDelay <= 0 then
185	begin
186	IBConfigService.ShutDownDatabase(aShutDownmode,0);
187	MessageDlg(sDatabaseShutdown,mtInformation,[mbOK],0);
188	end
189	else
190	ShowModal;
191	end;
192
193	end.
194