1 |
{************************************************************************}
|
2 |
{ }
|
3 |
{ Borland Delphi Visual Component Library }
|
4 |
{ InterBase Express core components }
|
5 |
{ }
|
6 |
{ Copyright (c) 1998-2000 Inprise Corporation }
|
7 |
{ }
|
8 |
{ InterBase Express is based in part on the product }
|
9 |
{ Free IB Components, written by Gregory H. Deatz for }
|
10 |
{ Hoagland, Longo, Moran, Dunst & Doukas Company. }
|
11 |
{ Free IB Components is used under license. }
|
12 |
{ }
|
13 |
{ The contents of this file are subject to the InterBase }
|
14 |
{ Public License Version 1.0 (the "License"); you may not }
|
15 |
{ use this file except in compliance with the License. You }
|
16 |
{ may obtain a copy of the License at http://www.Inprise.com/IPL.html }
|
17 |
{ Software distributed under the License is distributed on }
|
18 |
{ an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either }
|
19 |
{ express or implied. See the License for the specific language }
|
20 |
{ governing rights and limitations under the License. }
|
21 |
{ The Original Code was created by InterBase Software Corporation }
|
22 |
{ and its successors. }
|
23 |
{ Portions created by Inprise Corporation are Copyright (C) Inprise }
|
24 |
{ Corporation. All Rights Reserved. }
|
25 |
{ Contributor(s): Jeff Overcash }
|
26 |
{ }
|
27 |
{ IBX For Lazarus (Firebird Express) }
|
28 |
{ Contributor: Tony Whyman, MWA Software http://www.mwasoftware.co.uk }
|
29 |
{ Portions created by MWA Software are copyright McCallum Whyman }
|
30 |
{ Associates Ltd 2011 - 2018 }
|
31 |
{ }
|
32 |
{************************************************************************}
|
33 |
|
34 |
{
|
35 |
This unit has been significantly revised for the Lazarus port. Specially,
|
36 |
there was a need to re-organise the code to isolate the Windows specific
|
37 |
IPC and to introduce SV5 IPC as an alternative for Linux and other platforms.
|
38 |
}
|
39 |
|
40 |
unit IBSQLMonitor;
|
41 |
|
42 |
{$Mode Delphi}
|
43 |
|
44 |
{$codepage UTF8}
|
45 |
|
46 |
interface
|
47 |
|
48 |
uses
|
49 |
IB, IBUtils, IBSQL, IBCustomDataSet, IBDatabase, DB,
|
50 |
IBTypes ,SysUtils, Classes,
|
51 |
{$IFDEF WINDOWS }
|
52 |
Windows
|
53 |
{$ENDIF}
|
54 |
{$IFDEF UNIX}
|
55 |
unix
|
56 |
{$ENDIF}
|
57 |
;
|
58 |
|
59 |
{Note that the original inter-thread communication between the Reader Thread and
|
60 |
the ISQL Monitor used the Windows PostMessage interface. This is currently not
|
61 |
useable under the FPC RTL as AllocateHWnd is not functional. It has been replaced
|
62 |
by the use of the Synchronize method.}
|
63 |
|
64 |
{$IFDEF WINDOWS}
|
65 |
{$DEFINE USE_WINDOWS_IPC}
|
66 |
{$ENDIF}
|
67 |
|
68 |
{$IFDEF UNIX}
|
69 |
{$DEFINE USE_SV5_IPC}
|
70 |
{$ENDIF}
|
71 |
|
72 |
{$IFDEF LINUX}
|
73 |
{$DEFINE HAS_SEMTIMEDOP}
|
74 |
{$ENDIF}
|
75 |
|
76 |
type
|
77 |
TIBCustomSQLMonitor = class;
|
78 |
|
79 |
TSQLEvent = procedure(EventText: String; EventTime : TDateTime) of object;
|
80 |
|
81 |
{ TIBCustomSQLMonitor }
|
82 |
|
83 |
TIBCustomSQLMonitor = class(TComponent)
|
84 |
private
|
85 |
FOnSQLEvent: TSQLEvent;
|
86 |
FTraceFlags: TTraceFlags;
|
87 |
FEnabled: Boolean;
|
88 |
procedure SetEnabled(const Value: Boolean);
|
89 |
protected
|
90 |
procedure ReleaseObject; {Called from Writer Thread}
|
91 |
procedure ReceiveMessage(Msg: TObject); {Called from Reader Thread}
|
92 |
property OnSQL: TSQLEvent read FOnSQLEvent write FOnSQLEvent;
|
93 |
property TraceFlags: TTraceFlags read FTraceFlags write FTraceFlags;
|
94 |
property Enabled : Boolean read FEnabled write SetEnabled default true;
|
95 |
public
|
96 |
constructor Create(AOwner: TComponent); override;
|
97 |
destructor Destroy; override;
|
98 |
procedure Release;
|
99 |
end;
|
100 |
|
101 |
{ TIBSQLMonitor }
|
102 |
|
103 |
TIBSQLMonitor = class(TIBCustomSQLMonitor)
|
104 |
published
|
105 |
property OnSQL;
|
106 |
property TraceFlags;
|
107 |
property Enabled;
|
108 |
end;
|
109 |
|
110 |
TIBMonitoredService = class(TComponent)
|
111 |
private
|
112 |
FTraceFlags: TTraceFlags;
|
113 |
protected
|
114 |
property TraceFlags: TTraceFlags read FTraceFlags write FTraceFlags;
|
115 |
end;
|
116 |
|
117 |
{ TIBXMonitoredService }
|
118 |
|
119 |
TIBXMonitoredService = class(TComponent)
|
120 |
private
|
121 |
FTraceFlags: TTraceFlags;
|
122 |
protected
|
123 |
property TraceFlags: TTraceFlags read FTraceFlags write FTraceFlags;
|
124 |
end;
|
125 |
|
126 |
TIBXMonitoredConnection = class(TCustomConnection)
|
127 |
private
|
128 |
FTraceFlags: TTraceFlags;
|
129 |
protected
|
130 |
property TraceFlags: TTraceFlags read FTraceFlags write FTraceFlags;
|
131 |
end;
|
132 |
|
133 |
IIBSQLMonitorHook = interface
|
134 |
['{CF65434C-9B75-4298-BA7E-E6B85B3C769D}']
|
135 |
procedure RegisterMonitor(SQLMonitor : TIBCustomSQLMonitor);
|
136 |
procedure UnregisterMonitor(SQLMonitor : TIBCustomSQLMonitor);
|
137 |
procedure ReleaseMonitor(Arg : TIBCustomSQLMonitor);
|
138 |
procedure SQLPrepare(qry: TIBSQL);
|
139 |
procedure SQLExecute(qry: TIBSQL);
|
140 |
procedure SQLFetch(qry: TIBSQL);
|
141 |
procedure DBConnect(db: TIBDatabase);
|
142 |
procedure DBDisconnect(db: TIBDatabase);
|
143 |
procedure TRStart(tr: TIBTransaction);
|
144 |
procedure TRCommit(tr: TIBTransaction);
|
145 |
procedure TRCommitRetaining(tr: TIBTransaction);
|
146 |
procedure TRRollback(tr: TIBTransaction);
|
147 |
procedure TRRollbackRetaining(tr: TIBTransaction);
|
148 |
procedure ServiceAttach(service: TIBMonitoredService); overload;
|
149 |
procedure ServiceDetach(service: TIBMonitoredService); overload;
|
150 |
procedure ServiceQuery(service: TIBMonitoredService); overload;
|
151 |
procedure ServiceStart(service: TIBMonitoredService); overload;
|
152 |
procedure ServiceAttach(service: TIBXMonitoredConnection); overload;
|
153 |
procedure ServiceDetach(service: TIBXMonitoredConnection); overload;
|
154 |
procedure ServiceQuery(service: TIBXMonitoredService); overload;
|
155 |
procedure ServiceStart(service: TIBXMonitoredService); overload;
|
156 |
procedure SendMisc(Msg : String);
|
157 |
function GetTraceFlags : TTraceFlags;
|
158 |
function GetMonitorCount : Integer;
|
159 |
procedure SetTraceFlags(const Value : TTraceFlags);
|
160 |
function GetEnabled : boolean;
|
161 |
procedure SetEnabled(const Value : Boolean);
|
162 |
property TraceFlags: TTraceFlags read GetTraceFlags write SetTraceFlags;
|
163 |
property Enabled : Boolean read GetEnabled write SetEnabled;
|
164 |
end;
|
165 |
|
166 |
|
167 |
function MonitorHook: IIBSQLMonitorHook;
|
168 |
procedure EnableMonitoring;
|
169 |
procedure DisableMonitoring;
|
170 |
function MonitoringEnabled: Boolean;
|
171 |
|
172 |
implementation
|
173 |
|
174 |
uses
|
175 |
contnrs, syncobjs, CustApp, FBMessages
|
176 |
{$IFDEF USE_SV5_IPC}
|
177 |
,ipc, Errors, baseunix
|
178 |
{$ENDIF};
|
179 |
|
180 |
|
181 |
const
|
182 |
cMonitorHookSize = 1024;
|
183 |
cMsgWaitTime = 1000;
|
184 |
cWriteMessageAvailable = 'WriterMsgQueue';
|
185 |
|
186 |
type
|
187 |
{ There are two possible objects. One is a trace message object.
|
188 |
This object holds the flag of the trace type plus the message.
|
189 |
The second object is a Release object. It holds the handle that
|
190 |
the CM_RELEASE message is to be queued to. }
|
191 |
|
192 |
{ TTraceObject }
|
193 |
|
194 |
TTraceObject = Class(TObject)
|
195 |
FDataType : TTraceFlag;
|
196 |
FMsg : String;
|
197 |
FTimeStamp : TDateTime;
|
198 |
public
|
199 |
constructor Create(Msg : String; DataType : TTraceFlag); overload;
|
200 |
constructor Create(obj : TTraceObject); overload;
|
201 |
constructor Create(obj : TTraceObject; MsgOffset, MsgLen: integer); overload;
|
202 |
end;
|
203 |
|
204 |
{ TReleaseObject }
|
205 |
|
206 |
TReleaseObject = Class(TObject)
|
207 |
FMonitor : TIBCustomSQLMonitor;
|
208 |
public
|
209 |
constructor Create(Monitor : TIBCustomSQLMonitor);
|
210 |
end;
|
211 |
|
212 |
{$IFDEF USE_SV5_IPC}
|
213 |
{$I sv5ipc.inc}
|
214 |
{$ENDIF}
|
215 |
{$IFDEF USE_WINDOWS_IPC}
|
216 |
{$I winipc.inc}
|
217 |
{$ENDIF}
|
218 |
|
219 |
type
|
220 |
|
221 |
{ TIBSQLMonitorHook }
|
222 |
|
223 |
TIBSQLMonitorHook = class(TInterfacedObject, IIBSQLMonitorHook)
|
224 |
private
|
225 |
FGlobalInterface: TGlobalInterface;
|
226 |
FTraceFlags: TTraceFlags;
|
227 |
FEnabled: Boolean;
|
228 |
protected
|
229 |
procedure WriteSQLData(Text: String; DataType: TTraceFlag);
|
230 |
public
|
231 |
constructor Create;
|
232 |
destructor Destroy; override;
|
233 |
procedure RegisterMonitor(SQLMonitor : TIBCustomSQLMonitor);
|
234 |
procedure UnregisterMonitor(SQLMonitor : TIBCustomSQLMonitor);
|
235 |
procedure ReleaseMonitor(Arg : TIBCustomSQLMonitor);
|
236 |
procedure SQLPrepare(qry: TIBSQL); virtual;
|
237 |
procedure SQLExecute(qry: TIBSQL); virtual;
|
238 |
procedure SQLFetch(qry: TIBSQL); virtual;
|
239 |
procedure DBConnect(db: TIBDatabase); virtual;
|
240 |
procedure DBDisconnect(db: TIBDatabase); virtual;
|
241 |
procedure TRStart(tr: TIBTransaction); virtual;
|
242 |
procedure TRCommit(tr: TIBTransaction); virtual;
|
243 |
procedure TRCommitRetaining(tr: TIBTransaction); virtual;
|
244 |
procedure TRRollback(tr: TIBTransaction); virtual;
|
245 |
procedure TRRollbackRetaining(tr: TIBTransaction); virtual;
|
246 |
procedure ServiceAttach(service: TIBMonitoredService); virtual; overload;
|
247 |
procedure ServiceDetach(service: TIBMonitoredService); virtual; overload;
|
248 |
procedure ServiceQuery(service: TIBMonitoredService); virtual; overload;
|
249 |
procedure ServiceStart(service: TIBMonitoredService); virtual; overload;
|
250 |
procedure ServiceAttach(service: TIBXMonitoredConnection); virtual; overload;
|
251 |
procedure ServiceDetach(service: TIBXMonitoredConnection); virtual; overload;
|
252 |
procedure ServiceQuery(service: TIBXMonitoredService); virtual; overload;
|
253 |
procedure ServiceStart(service: TIBXMonitoredService); virtual; overload;
|
254 |
procedure SendMisc(Msg : String);
|
255 |
function GetEnabled: Boolean;
|
256 |
function GetTraceFlags: TTraceFlags;
|
257 |
function GetMonitorCount : Integer;
|
258 |
procedure SetEnabled(const Value: Boolean);
|
259 |
procedure SetTraceFlags(const Value: TTraceFlags);
|
260 |
procedure ForceRelease;
|
261 |
property TraceFlags: TTraceFlags read GetTraceFlags write SetTraceFlags;
|
262 |
property Enabled : Boolean read GetEnabled write SetEnabled default true;
|
263 |
end;
|
264 |
|
265 |
{ TWriterThread }
|
266 |
|
267 |
TWriterThread = class(TThread)
|
268 |
private
|
269 |
{ Private declarations }
|
270 |
FGlobalInterface: TGlobalInterface;
|
271 |
FMsgs : TObjectList;
|
272 |
FCriticalSection: TCriticalSection;
|
273 |
FMsgAvailable: TEventObject;
|
274 |
procedure RemoveFromList;
|
275 |
procedure PostRelease;
|
276 |
public
|
277 |
procedure ReleaseMonitor(Arg : TIBCustomSQLMonitor);
|
278 |
protected
|
279 |
procedure BeginWrite;
|
280 |
procedure EndWrite;
|
281 |
procedure Execute; override;
|
282 |
procedure WriteToBuffer;
|
283 |
public
|
284 |
constructor Create(GlobalInterface: TGlobalInterface);
|
285 |
destructor Destroy; override;
|
286 |
procedure WriteSQLData(Msg : String; DataType : TTraceFlag);
|
287 |
end;
|
288 |
|
289 |
{ TReaderThread }
|
290 |
|
291 |
TReaderThread = class(TThread)
|
292 |
private
|
293 |
{ Private declarations }
|
294 |
st : TTraceObject;
|
295 |
FMonitors : TObjectList;
|
296 |
FGlobalInterface: TGlobalInterface;
|
297 |
FCriticalSection: TCriticalSection;
|
298 |
procedure AlertMonitors;
|
299 |
protected
|
300 |
procedure BeginRead;
|
301 |
procedure EndRead;
|
302 |
procedure ReadSQLData;
|
303 |
procedure Execute; override;
|
304 |
public
|
305 |
constructor Create(GlobalInterface: TGlobalInterface);
|
306 |
destructor Destroy; override;
|
307 |
procedure AddMonitor(Arg : TIBCustomSQLMonitor);
|
308 |
procedure RemoveMonitor(Arg : TIBCustomSQLMonitor);
|
309 |
end;
|
310 |
|
311 |
|
312 |
var
|
313 |
FWriterThread : TWriterThread;
|
314 |
FReaderThread : TReaderThread;
|
315 |
_MonitorHook: TIBSQLMonitorHook;
|
316 |
bDone: Boolean;
|
317 |
CS : TCriticalSection;
|
318 |
|
319 |
const
|
320 |
ApplicationTitle: string = 'Unknown';
|
321 |
|
322 |
{ TIBCustomSQLMonitor }
|
323 |
|
324 |
constructor TIBCustomSQLMonitor.Create(AOwner: TComponent);
|
325 |
var aParent: TComponent;
|
326 |
begin
|
327 |
inherited Create(AOwner);
|
328 |
FTraceFlags := [tfqPrepare .. tfMisc];
|
329 |
if not (csDesigning in ComponentState) then
|
330 |
begin
|
331 |
aParent := AOwner;
|
332 |
while aParent <> nil do
|
333 |
begin
|
334 |
if aParent is TCustomApplication then
|
335 |
begin
|
336 |
ApplicationTitle := TCustomApplication(aParent).Title;
|
337 |
break;
|
338 |
end;
|
339 |
aParent := aParent.Owner;
|
340 |
end;
|
341 |
MonitorHook.RegisterMonitor(self);
|
342 |
end;
|
343 |
FEnabled := true;
|
344 |
end;
|
345 |
|
346 |
destructor TIBCustomSQLMonitor.Destroy;
|
347 |
begin
|
348 |
if not (csDesigning in ComponentState) then
|
349 |
begin
|
350 |
if FEnabled and assigned(_MonitorHook) then
|
351 |
MonitorHook.UnregisterMonitor(self);
|
352 |
end;
|
353 |
inherited Destroy;
|
354 |
end;
|
355 |
|
356 |
procedure TIBCustomSQLMonitor.Release;
|
357 |
begin
|
358 |
MonitorHook.ReleaseMonitor(self);
|
359 |
end;
|
360 |
|
361 |
procedure TIBCustomSQLMonitor.ReleaseObject;
|
362 |
begin
|
363 |
Free
|
364 |
end;
|
365 |
|
366 |
procedure TIBCustomSQLMonitor.ReceiveMessage(Msg: TObject);
|
367 |
var
|
368 |
st: TTraceObject;
|
369 |
begin
|
370 |
st := (Msg as TTraceObject);
|
371 |
if (Assigned(FOnSQLEvent)) and
|
372 |
(st.FDataType in FTraceFlags) then
|
373 |
FOnSQLEvent(st.FMsg, st.FTimeStamp);
|
374 |
st.Free;
|
375 |
end;
|
376 |
|
377 |
procedure TIBCustomSQLMonitor.SetEnabled(const Value: Boolean);
|
378 |
begin
|
379 |
if Value <> FEnabled then
|
380 |
begin
|
381 |
FEnabled := Value;
|
382 |
if not (csDesigning in ComponentState) then
|
383 |
if FEnabled then
|
384 |
Monitorhook.RegisterMonitor(self)
|
385 |
else
|
386 |
MonitorHook.UnregisterMonitor(self);
|
387 |
end;
|
388 |
end;
|
389 |
|
390 |
{ TIBSQLMonitorHook }
|
391 |
|
392 |
constructor TIBSQLMonitorHook.Create;
|
393 |
begin
|
394 |
inherited Create;
|
395 |
FTraceFlags := [tfQPrepare..tfMisc];
|
396 |
FEnabled := false;
|
397 |
end;
|
398 |
|
399 |
destructor TIBSQLMonitorHook.Destroy;
|
400 |
begin
|
401 |
if assigned(FGlobalInterface) then FGlobalInterface.Free;
|
402 |
inherited Destroy;
|
403 |
end;
|
404 |
|
405 |
procedure TIBSQLMonitorHook.DBConnect(db: TIBDatabase);
|
406 |
var
|
407 |
st : String;
|
408 |
begin
|
409 |
if FEnabled then
|
410 |
begin
|
411 |
if not (tfConnect in FTraceFlags * db.TraceFlags) then
|
412 |
Exit;
|
413 |
st := db.Name + ': [Connect]'; {do not localize}
|
414 |
WriteSQLData(st, tfConnect);
|
415 |
end;
|
416 |
end;
|
417 |
|
418 |
procedure TIBSQLMonitorHook.DBDisconnect(db: TIBDatabase);
|
419 |
var
|
420 |
st: String;
|
421 |
begin
|
422 |
if (Self = nil) then exit;
|
423 |
if FEnabled then
|
424 |
begin
|
425 |
if not (tfConnect in FTraceFlags * db.TraceFlags) then
|
426 |
Exit;
|
427 |
st := db.Name + ': [Disconnect]'; {do not localize}
|
428 |
WriteSQLData(st, tfConnect);
|
429 |
end;
|
430 |
end;
|
431 |
|
432 |
function TIBSQLMonitorHook.GetEnabled: Boolean;
|
433 |
begin
|
434 |
Result := FEnabled;
|
435 |
end;
|
436 |
|
437 |
function TIBSQLMonitorHook.GetMonitorCount: Integer;
|
438 |
begin
|
439 |
Result := FGlobalInterface.MonitorCount
|
440 |
end;
|
441 |
|
442 |
function TIBSQLMonitorHook.GetTraceFlags: TTraceFlags;
|
443 |
begin
|
444 |
Result := FTraceFlags;
|
445 |
end;
|
446 |
|
447 |
procedure TIBSQLMonitorHook.RegisterMonitor(SQLMonitor: TIBCustomSQLMonitor);
|
448 |
begin
|
449 |
{$IFDEF DEBUG}writeln('Register Monitor');{$ENDIF}
|
450 |
if not assigned(FGlobalInterface) then
|
451 |
FGlobalInterface := TGlobalInterface.Create;
|
452 |
if not Assigned(FReaderThread) then
|
453 |
FReaderThread := TReaderThread.Create(FGlobalInterface);
|
454 |
FReaderThread.AddMonitor(SQLMonitor);
|
455 |
end;
|
456 |
|
457 |
procedure TIBSQLMonitorHook.ReleaseMonitor(Arg: TIBCustomSQLMonitor);
|
458 |
begin
|
459 |
FWriterThread.ReleaseMonitor(Arg);
|
460 |
end;
|
461 |
|
462 |
procedure TIBSQLMonitorHook.SendMisc(Msg: String);
|
463 |
begin
|
464 |
if FEnabled then
|
465 |
begin
|
466 |
WriteSQLData(Msg, tfMisc);
|
467 |
end;
|
468 |
end;
|
469 |
|
470 |
procedure TIBSQLMonitorHook.ServiceAttach(service: TIBMonitoredService);
|
471 |
var
|
472 |
st: String;
|
473 |
begin
|
474 |
if FEnabled then
|
475 |
begin
|
476 |
if not (tfService in (FTraceFlags * service.TraceFlags)) then
|
477 |
Exit;
|
478 |
st := service.Name + ': [Attach]'; {do not localize}
|
479 |
WriteSQLData(st, tfService);
|
480 |
end;
|
481 |
end;
|
482 |
|
483 |
procedure TIBSQLMonitorHook.ServiceDetach(service: TIBMonitoredService);
|
484 |
var
|
485 |
st: String;
|
486 |
begin
|
487 |
if FEnabled then
|
488 |
begin
|
489 |
if not (tfService in (FTraceFlags * service.TraceFlags)) then
|
490 |
Exit;
|
491 |
st := service.Name + ': [Detach]'; {do not localize}
|
492 |
WriteSQLData(st, tfService);
|
493 |
end;
|
494 |
end;
|
495 |
|
496 |
procedure TIBSQLMonitorHook.ServiceQuery(service: TIBMonitoredService);
|
497 |
var
|
498 |
st: String;
|
499 |
begin
|
500 |
if FEnabled then
|
501 |
begin
|
502 |
if not (tfService in (FTraceFlags * service.TraceFlags)) then
|
503 |
Exit;
|
504 |
st := service.Name + ': [Query]'; {do not localize}
|
505 |
WriteSQLData(st, tfService);
|
506 |
end;
|
507 |
end;
|
508 |
|
509 |
procedure TIBSQLMonitorHook.ServiceStart(service: TIBMonitoredService);
|
510 |
var
|
511 |
st: String;
|
512 |
begin
|
513 |
if FEnabled then
|
514 |
begin
|
515 |
if not (tfService in (FTraceFlags * service.TraceFlags)) then
|
516 |
Exit;
|
517 |
st := service.Name + ': [Start]'; {do not localize}
|
518 |
WriteSQLData(st, tfService);
|
519 |
end;
|
520 |
end;
|
521 |
|
522 |
procedure TIBSQLMonitorHook.ServiceAttach(service: TIBXMonitoredConnection);
|
523 |
var
|
524 |
st: String;
|
525 |
begin
|
526 |
if FEnabled then
|
527 |
begin
|
528 |
if not (tfService in (FTraceFlags * service.TraceFlags)) then
|
529 |
Exit;
|
530 |
st := service.Name + ': [Attach]'; {do not localize}
|
531 |
WriteSQLData(st, tfService);
|
532 |
end;
|
533 |
end;
|
534 |
|
535 |
procedure TIBSQLMonitorHook.ServiceDetach(service: TIBXMonitoredConnection);
|
536 |
var
|
537 |
st: String;
|
538 |
begin
|
539 |
if FEnabled then
|
540 |
begin
|
541 |
if not (tfService in (FTraceFlags * service.TraceFlags)) then
|
542 |
Exit;
|
543 |
st := service.Name + ': [Detach]'; {do not localize}
|
544 |
WriteSQLData(st, tfService);
|
545 |
end;
|
546 |
end;
|
547 |
|
548 |
procedure TIBSQLMonitorHook.ServiceQuery(service: TIBXMonitoredService);
|
549 |
var
|
550 |
st: String;
|
551 |
begin
|
552 |
if FEnabled then
|
553 |
begin
|
554 |
if not (tfService in (FTraceFlags * service.TraceFlags)) then
|
555 |
Exit;
|
556 |
st := service.Name + ': [Query]'; {do not localize}
|
557 |
WriteSQLData(st, tfService);
|
558 |
end;
|
559 |
end;
|
560 |
|
561 |
procedure TIBSQLMonitorHook.ServiceStart(service: TIBXMonitoredService);
|
562 |
var
|
563 |
st: String;
|
564 |
begin
|
565 |
if FEnabled then
|
566 |
begin
|
567 |
if not (tfService in (FTraceFlags * service.TraceFlags)) then
|
568 |
Exit;
|
569 |
st := service.Name + ': [Start]'; {do not localize}
|
570 |
WriteSQLData(st, tfService);
|
571 |
end;
|
572 |
end;
|
573 |
|
574 |
procedure TIBSQLMonitorHook.SetEnabled(const Value: Boolean);
|
575 |
begin
|
576 |
if Value and not IsMultiThread then
|
577 |
IBError(ibxeMultiThreadRequired,['IBSQLMonitor']);
|
578 |
if FEnabled <> Value then
|
579 |
FEnabled := Value;
|
580 |
if (not FEnabled) and (Assigned(FWriterThread)) then
|
581 |
begin
|
582 |
FWriterThread.Terminate;
|
583 |
FWriterThread.WaitFor;
|
584 |
FreeAndNil(FWriterThread);
|
585 |
end;
|
586 |
end;
|
587 |
|
588 |
procedure TIBSQLMonitorHook.SetTraceFlags(const Value: TTraceFlags);
|
589 |
begin
|
590 |
FTraceFlags := Value
|
591 |
end;
|
592 |
|
593 |
procedure TIBSQLMonitorHook.ForceRelease;
|
594 |
begin
|
595 |
if Assigned(FReaderThread) then
|
596 |
begin
|
597 |
FReaderThread.Terminate;
|
598 |
if not Assigned(FWriterThread) then
|
599 |
FWriterThread := TWriterThread.Create(FGlobalInterface);
|
600 |
FWriterThread.WriteSQLData(' ', tfMisc);
|
601 |
end;
|
602 |
end;
|
603 |
|
604 |
procedure TIBSQLMonitorHook.SQLExecute(qry: TIBSQL);
|
605 |
var
|
606 |
st: String;
|
607 |
i: Integer;
|
608 |
begin
|
609 |
if FEnabled then
|
610 |
begin
|
611 |
if not ((tfQExecute in (FTraceFlags * qry.Database.TraceFlags)) or
|
612 |
(tfStmt in (FTraceFlags * qry.Database.TraceFlags)) ) then
|
613 |
Exit;
|
614 |
if qry.Owner is TIBCustomDataSet then
|
615 |
st := TIBCustomDataSet(qry.Owner).Name
|
616 |
else
|
617 |
st := qry.Name;
|
618 |
st := st + ': [Execute] ' + qry.SQL.Text; {do not localize}
|
619 |
if qry.Params.GetCount > 0 then begin
|
620 |
for i := 0 to qry.Params.GetCount - 1 do begin
|
621 |
st := st + CRLF + ' ' + qry.Params[i].Name + ' = ';
|
622 |
try
|
623 |
if qry.Params[i].IsNull then
|
624 |
st := st + '<NULL>'; {do not localize}
|
625 |
st := st + qry.Params[i].AsString;
|
626 |
except
|
627 |
st := st + '<' + SCantPrintValue + '>';
|
628 |
end;
|
629 |
end;
|
630 |
end;
|
631 |
WriteSQLData(st, tfQExecute);
|
632 |
end;
|
633 |
end;
|
634 |
|
635 |
procedure TIBSQLMonitorHook.SQLFetch(qry: TIBSQL);
|
636 |
var
|
637 |
st: String;
|
638 |
begin
|
639 |
if FEnabled then
|
640 |
begin
|
641 |
if not ((tfQFetch in (FTraceFlags * qry.Database.TraceFlags)) or
|
642 |
(tfStmt in (FTraceFlags * qry.Database.TraceFlags))) then
|
643 |
Exit;
|
644 |
if qry.Owner is TIBCustomDataSet then
|
645 |
st := TIBCustomDataSet(qry.Owner).Name
|
646 |
else
|
647 |
st := qry.Name;
|
648 |
st := st + ': [Fetch] ' + qry.SQL.Text; {do not localize}
|
649 |
if (qry.EOF) then
|
650 |
st := st + CRLF + ' ' + SEOFReached;
|
651 |
WriteSQLData(st, tfQFetch);
|
652 |
end;
|
653 |
end;
|
654 |
|
655 |
procedure TIBSQLMonitorHook.SQLPrepare(qry: TIBSQL);
|
656 |
var
|
657 |
st: String;
|
658 |
begin
|
659 |
if FEnabled then
|
660 |
begin
|
661 |
if not ((tfQPrepare in (FTraceFlags * qry.Database.TraceFlags)) or
|
662 |
(tfStmt in (FTraceFlags * qry.Database.TraceFlags))) then
|
663 |
Exit;
|
664 |
if qry.Owner is TIBCustomDataSet then
|
665 |
st := TIBCustomDataSet(qry.Owner).Name
|
666 |
else
|
667 |
st := qry.Name;
|
668 |
st := st + ': [Prepare] ' + qry.SQL.Text + CRLF; {do not localize}
|
669 |
st := st + ' Plan: ' + qry.Plan; {do not localize}
|
670 |
WriteSQLData(st, tfQPrepare);
|
671 |
end;
|
672 |
end;
|
673 |
|
674 |
procedure TIBSQLMonitorHook.TRCommit(tr: TIBTransaction);
|
675 |
var
|
676 |
st: String;
|
677 |
begin
|
678 |
if FEnabled then
|
679 |
begin
|
680 |
if Assigned(tr.DefaultDatabase) and
|
681 |
(not (tfTransact in (FTraceFlags * tr.DefaultDatabase.TraceFlags))) then
|
682 |
Exit;
|
683 |
st := tr.Name + ': [Commit (Hard commit)]'; {do not localize}
|
684 |
WriteSQLData(st, tfTransact);
|
685 |
end;
|
686 |
end;
|
687 |
|
688 |
procedure TIBSQLMonitorHook.TRCommitRetaining(tr: TIBTransaction);
|
689 |
var
|
690 |
st: String;
|
691 |
begin
|
692 |
if FEnabled then
|
693 |
begin
|
694 |
if Assigned(tr.DefaultDatabase) and
|
695 |
(not (tfTransact in (FTraceFlags * tr.DefaultDatabase.TraceFlags))) then
|
696 |
Exit;
|
697 |
st := tr.Name + ': [Commit retaining (Soft commit)]'; {do not localize}
|
698 |
WriteSQLData(st, tfTransact);
|
699 |
end;
|
700 |
end;
|
701 |
|
702 |
procedure TIBSQLMonitorHook.TRRollback(tr: TIBTransaction);
|
703 |
var
|
704 |
st: String;
|
705 |
begin
|
706 |
if FEnabled then
|
707 |
begin
|
708 |
if Assigned(tr.DefaultDatabase) and
|
709 |
(not (tfTransact in (FTraceFlags * tr.DefaultDatabase.TraceFlags))) then
|
710 |
Exit;
|
711 |
st := tr.Name + ': [Rollback]'; {do not localize}
|
712 |
WriteSQLData(st, tfTransact);
|
713 |
end;
|
714 |
end;
|
715 |
|
716 |
procedure TIBSQLMonitorHook.TRRollbackRetaining(tr: TIBTransaction);
|
717 |
var
|
718 |
st: String;
|
719 |
begin
|
720 |
if FEnabled then
|
721 |
begin
|
722 |
if Assigned(tr.DefaultDatabase) and
|
723 |
(not (tfTransact in (FTraceFlags * tr.DefaultDatabase.TraceFlags))) then
|
724 |
Exit;
|
725 |
st := tr.Name + ': [Rollback retaining (Soft rollback)]'; {do not localize}
|
726 |
WriteSQLData(st, tfTransact);
|
727 |
end;
|
728 |
end;
|
729 |
|
730 |
procedure TIBSQLMonitorHook.TRStart(tr: TIBTransaction);
|
731 |
var
|
732 |
st: String;
|
733 |
begin
|
734 |
if FEnabled then
|
735 |
begin
|
736 |
if Assigned(tr.DefaultDatabase) and
|
737 |
(not (tfTransact in (FTraceFlags * tr.DefaultDatabase.TraceFlags))) then
|
738 |
Exit;
|
739 |
st := tr.Name + ': [Start transaction]'; {do not localize}
|
740 |
WriteSQLData(st, tfTransact);
|
741 |
end;
|
742 |
end;
|
743 |
|
744 |
procedure TIBSQLMonitorHook.UnregisterMonitor(SQLMonitor: TIBCustomSQLMonitor);
|
745 |
var
|
746 |
Created : Boolean;
|
747 |
begin
|
748 |
{$IFDEF DEBUG}writeln('Unregister Monitor');{$ENDIF}
|
749 |
if assigned(FReaderThread) then
|
750 |
begin
|
751 |
FReaderThread.RemoveMonitor(SQLMonitor);
|
752 |
if FReaderThread.FMonitors.Count = 0 then
|
753 |
begin
|
754 |
FReaderThread.Terminate;
|
755 |
|
756 |
{ There is a possibility of a reader thread, but no writer one.
|
757 |
When in that situation, the reader needs to be released after
|
758 |
the terminate is set. To do that, create a Writer thread, send
|
759 |
the release code (a string of ' ' and type tfMisc) and then free
|
760 |
it up. }
|
761 |
|
762 |
Created := false;
|
763 |
if not Assigned(FWriterThread) then
|
764 |
begin
|
765 |
FWriterThread := TWriterThread.Create(FGlobalInterface);
|
766 |
Created := true;
|
767 |
end;
|
768 |
FWriterThread.WriteSQLData(' ', tfMisc);
|
769 |
{$IFDEF DEBUG}writeln('Wait for read Terminate');{$ENDIF}
|
770 |
FReaderThread.WaitFor;
|
771 |
if assigned(FReaderThread.FatalException) then
|
772 |
IBError(ibxeThreadFailed,['Reader',Exception(FReaderThread.FatalException).Message]);
|
773 |
{$IFDEF DEBUG}writeln('Freeing Reader Thread');{$ENDIF}
|
774 |
FreeAndNil(FReaderThread);
|
775 |
{$IFDEF DEBUG}writeln('Reader Thread Freed');{$ENDIF}
|
776 |
if Created then
|
777 |
begin
|
778 |
FWriterThread.Terminate;
|
779 |
{$IFDEF DEBUG}writeln('Wait for write Terminate');{$ENDIF}
|
780 |
FWriterThread.WaitFor;
|
781 |
if assigned(FWriterThread.FatalException) then
|
782 |
IBError(ibxeThreadFailed,['Writer',Exception(FWriterThread.FatalException).Message]);
|
783 |
FreeAndNil(FWriterThread);
|
784 |
end;
|
785 |
end;
|
786 |
end;
|
787 |
{$IFDEF DEBUG}writeln('Unregister done'){$ENDIF}
|
788 |
end;
|
789 |
|
790 |
procedure TIBSQLMonitorHook.WriteSQLData(Text: String;
|
791 |
DataType: TTraceFlag);
|
792 |
begin
|
793 |
{$IFDEF DEBUG}writeln('Write SQL Data: '+Text);{$ENDIF}
|
794 |
if not assigned(FGlobalInterface) then
|
795 |
FGlobalInterface := TGlobalInterface.Create;
|
796 |
Text := CRLF + '[Application: ' + ApplicationTitle + ']' + CRLF + Text; {do not localize}
|
797 |
if not Assigned(FWriterThread) then
|
798 |
FWriterThread := TWriterThread.Create(FGLobalInterface);
|
799 |
FWriterThread.WriteSQLData(Text, DataType);
|
800 |
end;
|
801 |
|
802 |
{ TWriterThread }
|
803 |
|
804 |
constructor TWriterThread.Create(GlobalInterface: TGlobalInterface);
|
805 |
|
806 |
begin
|
807 |
inherited Create(true);
|
808 |
{$IFDEF DEBUG}writeln('Write Object Created');{$ENDIF}
|
809 |
FGlobalInterface := GlobalInterface;
|
810 |
FMsgs := TObjectList.Create(true);
|
811 |
FCriticalSection := TCriticalSection.Create;
|
812 |
FMsgAvailable := TEventObject.Create(FGlobalInterface.Sa,true,false,cWriteMessageAvailable);
|
813 |
Start;
|
814 |
end;
|
815 |
|
816 |
destructor TWriterThread.Destroy;
|
817 |
begin
|
818 |
if assigned(FMsgs) then FMsgs.Free;
|
819 |
if assigned(FCriticalSection) then FCriticalSection.Free;
|
820 |
if assigned(FMsgAvailable) then FMsgAvailable.Free;
|
821 |
inherited Destroy;
|
822 |
end;
|
823 |
|
824 |
procedure TWriterThread.Execute;
|
825 |
begin
|
826 |
{$IFDEF DEBUG}writeln('Write Thread starts');{$ENDIF}
|
827 |
try
|
828 |
{ Place thread code here }
|
829 |
while ((not Terminated) and (not bDone)) or
|
830 |
(FMsgs.Count <> 0) do
|
831 |
begin
|
832 |
FMsgAvailable.WaitFor(cMsgWaitTime);
|
833 |
{ Any one listening? }
|
834 |
if FGlobalInterface.MonitorCount = 0 then
|
835 |
begin
|
836 |
if FMsgs.Count <> 0 then
|
837 |
begin
|
838 |
{$IFDEF DEBUG}writeln('Write Thread Drop Message');{$ENDIF}
|
839 |
RemoveFromList;
|
840 |
end;
|
841 |
end
|
842 |
else
|
843 |
{ Anything to process? }
|
844 |
if FMsgs.Count <> 0 then
|
845 |
begin
|
846 |
{ If the current queued message is a release release the object }
|
847 |
if FMsgs.Items[0] is TReleaseObject then
|
848 |
begin
|
849 |
{$IFDEF DEBUG}writeln('Post Release');{$ENDIF}
|
850 |
if not Terminated then
|
851 |
Synchronize(PostRelease);
|
852 |
end
|
853 |
else
|
854 |
{ Otherwise write the TraceObject to the buffer }
|
855 |
begin
|
856 |
WriteToBuffer;
|
857 |
end;
|
858 |
end
|
859 |
else
|
860 |
begin
|
861 |
FCriticalSection.Enter;
|
862 |
try
|
863 |
if FMsgs.Count = 0 then
|
864 |
FMsgAvailable.ResetEvent
|
865 |
finally
|
866 |
FCriticalSection.Leave
|
867 |
end;
|
868 |
end;
|
869 |
end;
|
870 |
except on E: Exception do
|
871 |
begin
|
872 |
{$IFDEF DEBUG}writeln('Write Thread raised Exception: ' + E.Message);{$ENDIF}
|
873 |
raise
|
874 |
end
|
875 |
end;
|
876 |
{$IFDEF DEBUG}writeln('Write Thread Ends');{$ENDIF}
|
877 |
end;
|
878 |
|
879 |
procedure TWriterThread.WriteSQLData(Msg : String; DataType: TTraceFlag);
|
880 |
begin
|
881 |
FCriticalSection.Enter;
|
882 |
try
|
883 |
FMsgs.Add(TTraceObject.Create(Msg, DataType));
|
884 |
finally
|
885 |
FCriticalSection.Leave;
|
886 |
end;
|
887 |
FMsgAvailable.SetEvent
|
888 |
end;
|
889 |
|
890 |
procedure TWriterThread.BeginWrite;
|
891 |
begin
|
892 |
{$IFDEF DEBUG}writeln('Begin Write');{$ENDIF}
|
893 |
with FGlobalInterface do
|
894 |
begin
|
895 |
ReadReadyEvent.PassThroughGate; {Wait for readers to become ready }
|
896 |
WriterBusyEvent.Lock; {Set Busy State}
|
897 |
end;
|
898 |
{$IFDEF DEBUG}writeln('Begin Write Complete');{$ENDIF}
|
899 |
end;
|
900 |
|
901 |
procedure TWriterThread.EndWrite;
|
902 |
begin
|
903 |
{$IFDEF DEBUG}writeln('End Write');{$ENDIF}
|
904 |
with FGlobalInterface do
|
905 |
begin
|
906 |
DataAvailableEvent.Unlock; { Signal Data Available. }
|
907 |
ReadFinishedEvent.PassThroughGate; {Wait for readers to finish }
|
908 |
DataAvailableEvent.Lock; {reset Data Available }
|
909 |
WriterBusyEvent.Unlock; {Signal not Busy }
|
910 |
end;
|
911 |
{$IFDEF DEBUG}writeln('End Write Complete');{$ENDIF}
|
912 |
end;
|
913 |
|
914 |
procedure TWriterThread.WriteToBuffer;
|
915 |
var I, len: integer;
|
916 |
Temp: TTraceObject;
|
917 |
begin
|
918 |
{$IFDEF DEBUG}writeln('Write to Buffer');{$ENDIF}
|
919 |
FGlobalInterface.WriteLock.Lock;
|
920 |
try
|
921 |
{ If there are no monitors throw out the message
|
922 |
The alternative is to have messages queue up until a
|
923 |
monitor is ready.}
|
924 |
|
925 |
if FGlobalInterface.MonitorCount = 0 then
|
926 |
RemoveFromList
|
927 |
else
|
928 |
begin
|
929 |
i := 1;
|
930 |
len := Length(TTraceObject(FMsgs[0]).FMsg);
|
931 |
if len <= FGlobalInterface.MaxBufferSize then
|
932 |
begin
|
933 |
BeginWrite;
|
934 |
try
|
935 |
FGlobalInterface.SendTrace(TTraceObject(FMsgs[0]))
|
936 |
finally
|
937 |
RemoveFromList;
|
938 |
EndWrite
|
939 |
end;
|
940 |
end
|
941 |
else
|
942 |
try
|
943 |
while len > 0 do
|
944 |
begin
|
945 |
{$IFDEF DEBUG}writeln('Sending Partial Message, len = ',len);{$ENDIF}
|
946 |
Temp := TTraceObject.Create(TTraceObject(FMsgs[0]),i,Min(len,FGlobalInterface.MaxBufferSize));
|
947 |
try
|
948 |
BeginWrite;
|
949 |
FGlobalInterface.SendTrace(Temp);
|
950 |
Inc(i,FGlobalInterface.MaxBufferSize);
|
951 |
Dec(len,FGlobalInterface.MaxBufferSize);
|
952 |
finally
|
953 |
Temp.Free;
|
954 |
EndWrite
|
955 |
end
|
956 |
end;
|
957 |
finally
|
958 |
RemoveFromList;
|
959 |
end
|
960 |
end;
|
961 |
finally
|
962 |
FGlobalInterface.WriteLock.Unlock;
|
963 |
end;
|
964 |
{$IFDEF DEBUG}writeln('Done Write');{$ENDIF}
|
965 |
end;
|
966 |
|
967 |
procedure TWriterThread.RemoveFromList;
|
968 |
begin
|
969 |
{$IFDEF DEBUG}writeln('Write Thread: Remove object From List');{$ENDIF}
|
970 |
FCriticalSection.Enter;
|
971 |
try
|
972 |
FMsgs.Remove(FMsgs[0]); { Pop the written item }
|
973 |
finally
|
974 |
FCriticalSection.Leave;
|
975 |
end;
|
976 |
end;
|
977 |
|
978 |
procedure TWriterThread.PostRelease;
|
979 |
var Monitor: TIBCustomSQLMonitor;
|
980 |
begin
|
981 |
Monitor := TReleaseObject(FMsgs.Items[0]).FMonitor;
|
982 |
Monitor.ReleaseObject
|
983 |
end;
|
984 |
|
985 |
procedure TWriterThread.ReleaseMonitor(Arg : TIBCustomSQLMonitor);
|
986 |
begin
|
987 |
FMsgs.Add(TReleaseObject.Create(Arg));
|
988 |
end;
|
989 |
|
990 |
{ TTraceObject }
|
991 |
|
992 |
constructor TTraceObject.Create(Msg : String; DataType: TTraceFlag);
|
993 |
begin
|
994 |
FMsg := Msg;
|
995 |
FDataType := DataType;
|
996 |
FTimeStamp := Now;
|
997 |
end;
|
998 |
|
999 |
constructor TTraceObject.Create(obj: TTraceObject);
|
1000 |
begin
|
1001 |
FMsg := obj.FMsg;
|
1002 |
FDataType := obj.FDataType;
|
1003 |
FTimeStamp := obj.FTimeStamp;
|
1004 |
end;
|
1005 |
|
1006 |
constructor TTraceObject.Create(obj: TTraceObject; MsgOffset, MsgLen: integer);
|
1007 |
begin
|
1008 |
FDataType := obj.FDataType;
|
1009 |
FTimeStamp := obj.FTimeStamp;
|
1010 |
FMsg := copy(obj.FMsg,MsgOffset,MsgLen)
|
1011 |
end;
|
1012 |
|
1013 |
{ TReleaseObject }
|
1014 |
|
1015 |
constructor TReleaseObject.Create(Monitor : TIBCustomSQLMonitor);
|
1016 |
begin
|
1017 |
FMonitor := Monitor;
|
1018 |
end;
|
1019 |
|
1020 |
{ ReaderThread }
|
1021 |
|
1022 |
procedure TReaderThread.AddMonitor(Arg: TIBCustomSQLMonitor);
|
1023 |
begin
|
1024 |
FCriticalSection.Enter;
|
1025 |
try
|
1026 |
if FMonitors.IndexOf(Arg) < 0 then
|
1027 |
FMonitors.Add(Arg);
|
1028 |
finally
|
1029 |
FCriticalSection.Leave
|
1030 |
end;
|
1031 |
end;
|
1032 |
|
1033 |
procedure TReaderThread.AlertMonitors;
|
1034 |
var i : Integer;
|
1035 |
FTemp : TTraceObject;
|
1036 |
Monitor: TIBCustomSQLMonitor;
|
1037 |
begin
|
1038 |
for i := 0 to FMonitors.Count - 1 do
|
1039 |
begin
|
1040 |
{$IFDEF DEBUG}writeln('Sending Message to Monitor ' +IntToStr(i));{$ENDIF}
|
1041 |
FTemp := TTraceObject.Create(st);
|
1042 |
Monitor := TIBCustomSQLMonitor(FMonitors[i]);
|
1043 |
Monitor.ReceiveMessage(FTemp);
|
1044 |
end;
|
1045 |
end;
|
1046 |
|
1047 |
procedure TReaderThread.BeginRead;
|
1048 |
begin
|
1049 |
{$IFDEF DEBUG}writeln('Begin Read');{$ENDIF}
|
1050 |
with FGlobalInterface do
|
1051 |
begin
|
1052 |
WriterBusyEvent.PassthroughGate; { Wait for Writer not busy}
|
1053 |
ReadFinishedEvent.Lock; { Prepare Read Finished Gate}
|
1054 |
ReadReadyEvent.Unlock; { Signal read ready }
|
1055 |
{$IFDEF DEBUG}writeln('Read Ready Unlocked');{$ENDIF}
|
1056 |
DataAvailableEvent.PassthroughGate; { Wait for a Data Available }
|
1057 |
end;
|
1058 |
{$IFDEF DEBUG}writeln('Begin Read Complete');{$ENDIF}
|
1059 |
end;
|
1060 |
|
1061 |
constructor TReaderThread.Create(GlobalInterface: TGlobalInterface);
|
1062 |
begin
|
1063 |
inherited Create(true);
|
1064 |
FGlobalInterface := GlobalInterface;
|
1065 |
st := TTraceObject.Create('', tfMisc);
|
1066 |
FGlobalInterface.IncMonitorCount;
|
1067 |
FMonitors := TObjectList.Create(false);
|
1068 |
FCriticalSection := TCriticalSection.Create;
|
1069 |
{$IFDEF DEBUG}writeln('Reader Thread Created');{$ENDIF}
|
1070 |
FGlobalInterface.ReadReadyEvent.Lock; { Initialise Read Ready}
|
1071 |
Start;
|
1072 |
end;
|
1073 |
|
1074 |
destructor TReaderThread.Destroy;
|
1075 |
begin
|
1076 |
{$IFDEF DEBUG}writeln('Reader Thread Destory');{$ENDIF}
|
1077 |
FGlobalInterface.ReadReadyEvent.UnLock;
|
1078 |
if assigned(FGlobalInterface) and (FGlobalInterface.MonitorCount > 0) then
|
1079 |
FGlobalInterface.DecMonitorCount;
|
1080 |
FMonitors.Free;
|
1081 |
if assigned(FCriticalSection) then FCriticalSection.Free;
|
1082 |
st.Free;
|
1083 |
inherited Destroy;
|
1084 |
end;
|
1085 |
|
1086 |
procedure TReaderThread.EndRead;
|
1087 |
begin
|
1088 |
{$IFDEF DEBUG}writeln('End Read');{$ENDIF}
|
1089 |
FGlobalInterface.ReadReadyEvent.Lock; { reset Read Ready}
|
1090 |
FGlobalInterface.ReadFinishedEvent.Unlock; {Signal Read completed }
|
1091 |
{$IFDEF DEBUG}writeln('End Read Complete');{$ENDIF}
|
1092 |
end;
|
1093 |
|
1094 |
procedure TReaderThread.Execute;
|
1095 |
begin
|
1096 |
{$IFDEF DEBUG}writeln('Read Thread Starts');{$ENDIF}
|
1097 |
{ Place thread code here }
|
1098 |
while (not Terminated) and (not bDone) do
|
1099 |
begin
|
1100 |
ReadSQLData;
|
1101 |
if (st.FMsg <> '') and
|
1102 |
not ((st.FMsg = ' ') and (st.FDataType = tfMisc)) then
|
1103 |
begin
|
1104 |
{$IFDEF DEBUG}writeln('Sending Message to Monitors');{$ENDIF}
|
1105 |
if not Terminated then
|
1106 |
Synchronize(AlertMonitors);
|
1107 |
end;
|
1108 |
end;
|
1109 |
{$IFDEF DEBUG}writeln('Read Thread Ends');{$ENDIF}
|
1110 |
end;
|
1111 |
|
1112 |
procedure TReaderThread.ReadSQLData;
|
1113 |
begin
|
1114 |
st.FMsg := '';
|
1115 |
BeginRead;
|
1116 |
if not bDone then
|
1117 |
try
|
1118 |
FGlobalInterface.ReceiveTrace(st)
|
1119 |
finally
|
1120 |
EndRead;
|
1121 |
end;
|
1122 |
end;
|
1123 |
|
1124 |
procedure TReaderThread.RemoveMonitor(Arg: TIBCustomSQLMonitor);
|
1125 |
begin
|
1126 |
FCriticalSection.Enter;
|
1127 |
try
|
1128 |
FMonitors.Remove(Arg);
|
1129 |
finally
|
1130 |
FCriticalSection.Leave
|
1131 |
end;
|
1132 |
end;
|
1133 |
|
1134 |
{ Misc methods }
|
1135 |
|
1136 |
function MonitorHook: IIBSQLMonitorHook;
|
1137 |
begin
|
1138 |
if (_MonitorHook = nil) and (not bDone) then
|
1139 |
begin
|
1140 |
CS.Enter;
|
1141 |
if (_MonitorHook = nil) and (not bDone) then
|
1142 |
begin
|
1143 |
_MonitorHook := TIBSQLMonitorHook.Create;
|
1144 |
_MonitorHook._AddRef;
|
1145 |
end;
|
1146 |
CS.Leave;
|
1147 |
end;
|
1148 |
result := _MonitorHook;
|
1149 |
end;
|
1150 |
|
1151 |
procedure EnableMonitoring;
|
1152 |
begin
|
1153 |
MonitorHook.Enabled := True;
|
1154 |
end;
|
1155 |
|
1156 |
procedure DisableMonitoring;
|
1157 |
begin
|
1158 |
MonitorHook.Enabled := False;
|
1159 |
end;
|
1160 |
|
1161 |
function MonitoringEnabled: Boolean;
|
1162 |
begin
|
1163 |
result := MonitorHook.Enabled;
|
1164 |
end;
|
1165 |
|
1166 |
procedure CloseThreads;
|
1167 |
begin
|
1168 |
{$IFDEF DEBUG}writeln('Closed Threads Called');{$ENDIF}
|
1169 |
if Assigned(FReaderThread) then
|
1170 |
begin
|
1171 |
FReaderThread.Terminate;
|
1172 |
FReaderThread.WaitFor;
|
1173 |
FreeAndNil(FReaderThread);
|
1174 |
end;
|
1175 |
if Assigned(FWriterThread) then
|
1176 |
begin
|
1177 |
FWriterThread.Terminate;
|
1178 |
FWriterThread.WaitFor;
|
1179 |
FreeAndNil(FWriterThread);
|
1180 |
end;
|
1181 |
end;
|
1182 |
|
1183 |
initialization
|
1184 |
CS := TCriticalSection.Create;
|
1185 |
_MonitorHook := nil;
|
1186 |
FWriterThread := nil;
|
1187 |
FReaderThread := nil;
|
1188 |
bDone := False;
|
1189 |
{$IFDEF USE_SV5_IPC}
|
1190 |
if GetEnvironmentVariable('FBSQL_IPCFILENAME') <> '' then
|
1191 |
IPCFileName := GetEnvironmentVariable('FBSQL_IPCFILENAME')
|
1192 |
else
|
1193 |
IPCFileName := GetTempDir(true) + IPCFileName + '.' + GetEnvironmentVariable('USER');
|
1194 |
{$ENDIF}
|
1195 |
|
1196 |
finalization
|
1197 |
{$IFDEF DEBUG}writeln('Entered Finalisation');{$ENDIF}
|
1198 |
try
|
1199 |
{ Write an empty string to force the reader to unlock during termination }
|
1200 |
bDone := True;
|
1201 |
if Assigned(_MonitorHook) then
|
1202 |
_MonitorHook.ForceRelease;
|
1203 |
CloseThreads;
|
1204 |
if Assigned(_MonitorHook) then
|
1205 |
_MonitorHook._Release;
|
1206 |
|
1207 |
finally
|
1208 |
_MonitorHook := nil;
|
1209 |
if assigned(CS) then CS.Free;
|
1210 |
end;
|
1211 |
end.
|