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 LimboTransactionsUnit;
|
28 |
|
29 |
{$mode objfpc}{$H+}
|
30 |
|
31 |
interface
|
32 |
|
33 |
uses
|
34 |
Classes, SysUtils, FileUtil, Forms, Controls, Graphics, Dialogs, StdCtrls,
|
35 |
Grids, ActnList, db, memds, IBServices, IBDynamicGrid;
|
36 |
|
37 |
type
|
38 |
{ TLimboTransactionsForm }
|
39 |
|
40 |
TLimboTransactionsForm = class(TForm)
|
41 |
ApplySelectedAction: TAction;
|
42 |
Commit2PhaseAll: TAction;
|
43 |
RollbackAll: TAction;
|
44 |
CommitAll: TAction;
|
45 |
ActionList1: TActionList;
|
46 |
Button1: TButton;
|
47 |
Button2: TButton;
|
48 |
Button3: TButton;
|
49 |
Button4: TButton;
|
50 |
Button5: TButton;
|
51 |
IBDynamicGrid3: TIBDynamicGrid;
|
52 |
InLimboList: TMemDataset;
|
53 |
Label38: TLabel;
|
54 |
Label39: TLabel;
|
55 |
LimboListSource: TDataSource;
|
56 |
LimboReport: TMemo;
|
57 |
LimboTransactionValidation: TIBValidationService;
|
58 |
procedure ApplySelectedActionExecute(Sender: TObject);
|
59 |
procedure Commit2PhaseAllExecute(Sender: TObject);
|
60 |
procedure CommitAllExecute(Sender: TObject);
|
61 |
procedure CommitAllUpdate(Sender: TObject);
|
62 |
procedure FormClose(Sender: TObject; var CloseAction: TCloseAction);
|
63 |
procedure FormShow(Sender: TObject);
|
64 |
procedure InLimboListAfterOpen(DataSet: TDataSet);
|
65 |
procedure InLimboListBeforeClose(DataSet: TDataSet);
|
66 |
procedure InLimboListBeforePost(DataSet: TDataSet);
|
67 |
procedure RollbackAllExecute(Sender: TObject);
|
68 |
private
|
69 |
{ private declarations }
|
70 |
FLoadingLimboTr: boolean;
|
71 |
procedure DoRefresh(Data: PtrInt);
|
72 |
procedure RunGFix;
|
73 |
public
|
74 |
{ public declarations }
|
75 |
end;
|
76 |
|
77 |
var
|
78 |
LimboTransactionsForm: TLimboTransactionsForm;
|
79 |
|
80 |
implementation
|
81 |
|
82 |
{$R *.lfm}
|
83 |
|
84 |
uses MainFormUnit;
|
85 |
|
86 |
{ TLimboTransactionsForm }
|
87 |
|
88 |
procedure TLimboTransactionsForm.FormShow(Sender: TObject);
|
89 |
begin
|
90 |
Application.QueueAsyncCall(@DoRefresh,0);
|
91 |
LimboReport.Lines.Clear;
|
92 |
end;
|
93 |
|
94 |
procedure TLimboTransactionsForm.InLimboListAfterOpen(DataSet: TDataSet);
|
95 |
|
96 |
function TypeToStr(MultiDatabase: boolean): string;
|
97 |
begin
|
98 |
if MultiDatabase then
|
99 |
Result := 'Multi DB'
|
100 |
else
|
101 |
Result := 'Single DB';
|
102 |
end;
|
103 |
|
104 |
function StateToStr(State: TTransactionState): string;
|
105 |
begin
|
106 |
case State of
|
107 |
LimboState:
|
108 |
Result := 'Limbo';
|
109 |
CommitState:
|
110 |
Result := 'Commit';
|
111 |
RollbackState:
|
112 |
Result := 'Rollback';
|
113 |
else
|
114 |
Result := 'Unknown';
|
115 |
end;
|
116 |
end;
|
117 |
|
118 |
function AdviseToStr(Advise: TTransactionAdvise): string;
|
119 |
begin
|
120 |
case Advise of
|
121 |
CommitAdvise:
|
122 |
Result := 'Commit';
|
123 |
RollbackAdvise:
|
124 |
Result := 'Rollback';
|
125 |
else
|
126 |
Result := 'Unknown';
|
127 |
end;
|
128 |
end;
|
129 |
|
130 |
function ActionToStr(anAction: IBServices.TTransactionAction): string;
|
131 |
begin
|
132 |
case anAction of
|
133 |
CommitAction:
|
134 |
Result := 'Commit';
|
135 |
RollbackAction:
|
136 |
Result := 'Rollback';
|
137 |
end;
|
138 |
end;
|
139 |
|
140 |
var i: integer;
|
141 |
begin
|
142 |
if FLoadingLimboTr then Exit;
|
143 |
FLoadingLimboTr := true;
|
144 |
with LimboTransactionValidation do
|
145 |
try
|
146 |
Active := true;
|
147 |
ServiceStart;
|
148 |
FetchLimboTransactionInfo;
|
149 |
for i := 0 to LimboTransactionInfoCount - 1 do
|
150 |
with LimboTransactionInfo[i] do
|
151 |
begin
|
152 |
InLimboList.Append;
|
153 |
InLimboList.FieldByName('TransactionID').AsInteger := ID;
|
154 |
InLimboList.FieldByName('TransactionType').AsString := TypeToStr(MultiDatabase);
|
155 |
InLimboList.FieldByName('HostSite').AsString := HostSite;
|
156 |
InLimboList.FieldByName('RemoteSite').AsString := RemoteSite;
|
157 |
InLimboList.FieldByName('DatabasePath').AsString := RemoteDatabasePath;
|
158 |
InLimboList.FieldByName('State').AsString := StateToStr(State);
|
159 |
InLimboList.FieldByName('RecommendedAction').AsString := AdviseToStr(Advise);
|
160 |
InLimboList.FieldByName('RequestedAction').AsString := ActionToStr(Action);
|
161 |
InLimboList.Post;
|
162 |
end;
|
163 |
finally
|
164 |
FLoadingLimboTr := false;
|
165 |
end;
|
166 |
end;
|
167 |
|
168 |
procedure TLimboTransactionsForm.InLimboListBeforeClose(DataSet: TDataSet);
|
169 |
begin
|
170 |
InLimboList.Clear(false);
|
171 |
end;
|
172 |
|
173 |
procedure TLimboTransactionsForm.InLimboListBeforePost(DataSet: TDataSet);
|
174 |
var i: integer;
|
175 |
begin
|
176 |
if FLoadingLimboTr then Exit;
|
177 |
with LimboTransactionValidation do
|
178 |
for i := 0 to LimboTransactionInfoCount - 1 do
|
179 |
with LimboTransactionInfo[i] do
|
180 |
begin
|
181 |
if ID = InLimboList.FieldByName('TransactionID').AsInteger then
|
182 |
begin
|
183 |
if InLimboList.FieldByName('RequestedAction').AsString = 'Commit' then
|
184 |
Action := CommitAction
|
185 |
else
|
186 |
if InLimboList.FieldByName('RequestedAction').AsString = 'Rollback' then
|
187 |
Action := RollbackAction;
|
188 |
break;
|
189 |
end;
|
190 |
end;
|
191 |
end;
|
192 |
|
193 |
procedure TLimboTransactionsForm.RollbackAllExecute(Sender: TObject);
|
194 |
begin
|
195 |
LimboTransactionValidation.GlobalAction := RollbackGlobal;
|
196 |
RunGFix;
|
197 |
end;
|
198 |
|
199 |
procedure TLimboTransactionsForm.ApplySelectedActionExecute(Sender: TObject);
|
200 |
begin
|
201 |
LimboTransactionValidation.GlobalAction := NoGlobalAction;
|
202 |
RunGFix;
|
203 |
end;
|
204 |
|
205 |
procedure TLimboTransactionsForm.Commit2PhaseAllExecute(Sender: TObject);
|
206 |
begin
|
207 |
LimboTransactionValidation.GlobalAction := RecoverTwoPhaseGlobal;
|
208 |
RunGFix;
|
209 |
end;
|
210 |
|
211 |
procedure TLimboTransactionsForm.CommitAllExecute(Sender: TObject);
|
212 |
begin
|
213 |
LimboTransactionValidation.GlobalAction := CommitGlobal;
|
214 |
RunGFix;
|
215 |
end;
|
216 |
|
217 |
procedure TLimboTransactionsForm.CommitAllUpdate(Sender: TObject);
|
218 |
begin
|
219 |
(Sender as TAction).Enabled := InLimboList.Active and (InLimboList.RecordCount > 0);
|
220 |
end;
|
221 |
|
222 |
procedure TLimboTransactionsForm.FormClose(Sender: TObject;
|
223 |
var CloseAction: TCloseAction);
|
224 |
begin
|
225 |
InLimboList.Active := false;
|
226 |
end;
|
227 |
|
228 |
procedure TLimboTransactionsForm.DoRefresh(Data: PtrInt);
|
229 |
begin
|
230 |
InLimboList.Active := false;
|
231 |
InLimboList.Active := true;
|
232 |
end;
|
233 |
|
234 |
procedure TLimboTransactionsForm.RunGFix;
|
235 |
begin
|
236 |
if not InLimboList.Active then
|
237 |
raise Exception.Create('Limbo Transactions List not available');
|
238 |
|
239 |
with InLimboList do
|
240 |
if State = dsEdit then Post;
|
241 |
LimboReport.Lines.Clear;
|
242 |
|
243 |
with LimboTransactionValidation do
|
244 |
begin
|
245 |
LimboReport.Lines.Add('Starting Limbo transaction resolution');
|
246 |
FixLimboTransactionErrors;
|
247 |
while not Eof do
|
248 |
begin
|
249 |
LimboReport.Lines.Add(GetNextLine);
|
250 |
Application.ProcessMessages;
|
251 |
end;
|
252 |
LimboReport.Lines.Add('Limbo Transaction resolution complete');
|
253 |
Application.QueueAsyncCall(@DoRefresh,0);
|
254 |
end;
|
255 |
end;
|
256 |
|
257 |
end.
|
258 |
|