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FIBSQLMonitor.pas
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FIBSQLMonitor.pas
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{***************************************************************}
{ FIBPlus - component library for direct access to Firebird and }
{ InterBase databases }
{ }
{ FIBPlus is based in part on the product }
{ Free IB Components, written by Gregory H. Deatz for }
{ Hoagland, Longo, Moran, Dunst & Doukas Company. }
{ mailto:[email protected] }
{ }
{ Copyright (c) 1998-2007 Devrace Ltd. }
{ Written by Serge Buzadzhy ([email protected]) }
{ }
{ ------------------------------------------------------------- }
{ FIBPlus home page: http://www.fibplus.com/ }
{ FIBPlus support : http://www.devrace.com/support/ }
{ ------------------------------------------------------------- }
{ }
{ Please see the file License.txt for full license information }
{***************************************************************}
unit FIBSQLMonitor;
interface
{$I FIBPlus.inc}
{$IFNDEF NO_MONITOR}
uses
SysUtils, Windows, Messages, Classes, FIBQuery,ibase,
FIBDataSet, FIBDatabase
{$IFDEF INC_SERVICE_SUPPORT}
,IB_Services
{$ENDIF}
;
const
WM_MIN_FIBSQL_MONITOR = WM_USER;
WM_MAX_FIBSQL_MONITOR = WM_USER + 512;
WM_FIBSQL_SQL_EVENT = WM_MIN_FIBSQL_MONITOR + 1;
CM_RELEASE = $B000 + 33; // cut from Controls
type
TFIBCustomSQLMonitor = class;
TFIBTraceFlag = (tfQPrepare, tfQExecute, tfQFetch,
tfConnect, tfTransact,tfService,tfMisc
);
TFIBTraceFlags = set of TFIBTraceFlag;
{ TFIBSQLMonitor }
TSQLEvent = procedure(EventText: String; EventTime : TDateTime) of object;
TFIBCustomSQLMonitor = class(TComponent)
private
FHWnd: HWND;
FOnSQLEvent: TSQLEvent;
FTraceFlags: TFIBTraceFlags;
FActive: Boolean;
procedure MonitorWndProc(var Message : TMessage);
procedure SetActive(const Value: Boolean);
procedure SetTraceFlags(aTraceFlags:TFIBTraceFlags);
protected
property OnSQL: TSQLEvent read FOnSQLEvent write FOnSQLEvent;
property TraceFlags: TFIBTraceFlags read FTraceFlags write SetTraceFlags;
property Active : Boolean read FActive write SetActive default true;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
procedure Release;
property Handle : HWND read FHwnd;
end;
TFIBSQLMonitor = class(TFIBCustomSQLMonitor)
published
property OnSQL;
property TraceFlags;
property Active;
end;
TSavePointOperation=(soSet,soRollBack,soRelease);
{ TFIBSQLMonitorHook }
TFIBSQLMonitorHook = class(TObject)
private
FActive: Boolean;
vEventsCreated : Boolean;
procedure CreateEvents;
protected
procedure WriteSQLData(const Text: String; DataType: TFIBTraceFlag);
public
constructor Create;
destructor Destroy; override;
procedure TerminateWriteThread;
function SQLString(k:integer):Byte;
procedure RegisterMonitor(SQLMonitor : TFIBCustomSQLMonitor);
procedure UnregisterMonitor(SQLMonitor : TFIBCustomSQLMonitor);
procedure ReleaseMonitor(Arg : TFIBCustomSQLMonitor);
procedure SQLPrepare(qry: TFIBQuery); virtual;
procedure SQLExecute(qry: TFIBQuery; const AdditionalMessage:string ); virtual;
procedure SQLFetch(qry: TFIBQuery); virtual;
procedure DBConnect(db: TFIBDatabase); virtual;
procedure DBDisconnect(db: TFIBDatabase); virtual;
procedure TRStart(tr: TFIBTransaction); virtual;
procedure TRCommit(tr: TFIBTransaction); virtual;
procedure TRSavepoint(tr: TFIBTransaction; const SavePointName:string;
Operation:TSavePointOperation); virtual;
procedure TRCommitRetaining(tr: TFIBTransaction); virtual;
procedure TRRollback(tr: TFIBTransaction); virtual;
procedure TRRollbackRetaining(tr: TFIBTransaction); virtual;
{$IFDEF INC_SERVICE_SUPPORT}
procedure ServiceAttach(service: TpFIBCustomService); virtual;
procedure ServiceDetach(service: TpFIBCustomService); virtual;
procedure ServiceQuery(service: TpFIBCustomService); virtual;
procedure ServiceStart(service: TpFIBCustomService); virtual;
{$ENDIF}
procedure SendMisc(Msg : String);
function GetEnabled: Boolean;
function GetMonitorCount : Integer;
procedure SetEnabled(const Value: Boolean);
property Enabled : Boolean read GetEnabled write SetEnabled default true;
end;
function MonitorHook: TFIBSQLMonitorHook;
procedure EnableMonitoring;
procedure DisableMonitoring;
function MonitoringEnabled: Boolean;
{$ENDIF}
implementation
{$IFNDEF NO_MONITOR}
uses
{$IFNDEF D6+}
Forms,
{$ENDIF}
{$IFDEF D_XE3}
System.Types, // for inline funcs
{$ENDIF}
fib, StdFuncs,StrUtil;
type
TFIBTraceObject = Class(TObject)
private
FDataType : TFIBTraceFlag;
FMsg : String;
FTimeStamp : TDateTime;
FIsUnicodeVersion:boolean;
public
constructor Create(const Msg : String; DataType : TFIBTraceFlag);
end;
TReleaseObject = Class(TObject)
private
FHandle : THandle;
public
constructor Create(Handle : THandle);
end;
TMonitorWriterThread = class(TThread)
private
StopExec:boolean;
FMonitorMsgs : TList;
protected
procedure Lock;
Procedure Unlock;
procedure BeginWrite;
procedure EndWrite;
procedure Execute; override;
procedure WriteToBuffer;
public
constructor Create;
destructor Destroy; override;
procedure WriteSQLData(const Msg : String; DataType : TFIBTraceFlag);
procedure ReleaseMonitor(HWnd : THandle);
end;
TMonitorReaderThread = class(TThread)
private
st : TFIBTraceObject;
FMonitors : TList;
protected
procedure BeginRead;
procedure EndRead;
procedure ReadSQLData;
procedure Execute; override;
public
constructor Create;
destructor Destroy; override;
procedure AddMonitor(Arg : TFIBCustomSQLMonitor);
procedure RemoveMonitor(Arg : TFIBCustomSQLMonitor);
end;
const
MonitorHookNames: array[0..5] of String = (
'FIB.SQL.MONITOR.Mutex',
'FIB.SQL.MONITOR.SharedMem',
'FIB.SQL.MONITOR.WriteEvent',
'FIB.SQL.MONITOR.WriteFinishedEvent',
'FIB.SQL.MONITOR.ReadEvent',
'FIB.SQL.MONITOR.ReadFinishedEvent'
);
cMonitorHookSize = 2048;
cMaxBufferSize = cMonitorHookSize - (9 * SizeOf(Integer)) - SizeOf(TDateTime)
- 2*SizeOf(Byte)
;
cDefaultTimeout = 1000; // 1 seconds
var
FSharedBuffer,
FWriteLock,
FWriteEvent,
FWriteFinishedEvent,
FReadEvent,
FReadFinishedEvent : THandle;
FBuffer : PAnsiChar;
FMonitorCount,
FReaderCount,
FTraceDataType,
FQPrepareReaderCount,
FQExecuteReaderCount,
FQFetchReaderCount,
FConnectReaderCount,
FTransactReaderCount,
FBufferSize : PInteger;
FTimeStamp : PDateTime;
FIsUnicodeVersion : PBoolean;
FReserved : PByte;
FFIBWriterThread : TMonitorWriterThread;
FFIBReaderThread : TMonitorReaderThread;
_MonitorHook: TFIBSQLMonitorHook;
bDone: Boolean;
CS : TRTLCriticalSection;
bEnabledMonitoring:boolean;
{ TFIBCustomSQLMonitor }
{$IFDEF D6+}
{$WARN SYMBOL_DEPRECATED OFF}
{$ENDIF}
constructor TFIBCustomSQLMonitor.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
FActive := true;
if not (csDesigning in ComponentState) then
begin
FHWnd := AllocateHWnd(MonitorWndProc);
MonitorHook.RegisterMonitor(self);
end;
TraceFlags := [tfqPrepare .. tfTransact];
end;
destructor TFIBCustomSQLMonitor.Destroy;
begin
if not (csDesigning in ComponentState) then
begin
if (tfQPrepare in TraceFlags) then
InterlockedDecrement(FQPrepareReaderCount^);
if (tfQExecute in TraceFlags) then
InterlockedDecrement(FQExecuteReaderCount^);
if (tfQFetch in TraceFlags) then
InterlockedDecrement(FQFetchReaderCount^);
if (tfConnect in TraceFlags) then
InterlockedDecrement(FConnectReaderCount^);
if (tfTransact in TraceFlags) then
InterlockedDecrement(FTransactReaderCount^);
if FActive then
MonitorHook.UnregisterMonitor(self);
DeallocateHwnd(FHWnd);
end;
inherited Destroy;
end;
{$IFDEF D6+}
{$WARN SYMBOL_DEPRECATED ON}
{$ENDIF}
{$IFDEF D2009+}
{$WARN SYMBOL_DEPRECATED OFF}
{$ENDIF}
procedure TFIBCustomSQLMonitor.MonitorWndProc(var Message: TMessage);
var
st : TFIBTraceObject;
begin
case Message.Msg of
WM_FIBSQL_SQL_EVENT:
begin
st := TFIBTraceObject(Message.LParam);
if (Assigned(FOnSQLEvent)) and
(st.FDataType in FTraceFlags) then
begin
if st.FIsUnicodeVersion then
begin
FOnSQLEvent(UTF8Decode(st.FMsg) , st.FTimeStamp);
end
else
FOnSQLEvent(st.FMsg, st.FTimeStamp);
end;
st.Free;
end;
CM_RELEASE :
Free;
else
Message.Result := DefWindowProc(FHWnd, Message.Msg, Message.WParam, Message.LParam);
end;
end;
procedure TFIBCustomSQLMonitor.Release;
begin
MonitorHook.ReleaseMonitor(self);
end;
procedure TFIBCustomSQLMonitor.SetActive(const Value: Boolean);
begin
if Value <> FActive then
begin
FActive := Value;
if not (csDesigning in ComponentState) then
if FActive then
Monitorhook.RegisterMonitor(self)
else
MonitorHook.UnregisterMonitor(self);
end;
end;
procedure TFIBCustomSQLMonitor.SetTraceFlags(aTraceFlags:TFIBTraceFlags);
begin
if not (csDesigning in ComponentState) then
begin
if (tfQPrepare in TraceFlags) and not (tfQPrepare in aTraceFlags)
then
InterlockedDecrement(FQPrepareReaderCount^)
else
if (not (tfQPrepare in TraceFlags)) and (tfQPrepare in aTraceFlags)
then
InterlockedIncrement(FQPrepareReaderCount^);
if (tfQExecute in TraceFlags) and not (tfQExecute in aTraceFlags)
then
InterlockedDecrement(FQExecuteReaderCount^)
else
if (not (tfQExecute in TraceFlags)) and (tfQExecute in aTraceFlags)
then
InterlockedIncrement(FQExecuteReaderCount^);
if (tfQFetch in TraceFlags) and not (tfQFetch in aTraceFlags)
then
InterlockedDecrement(FQFetchReaderCount^)
else
if (not (tfQFetch in TraceFlags)) and (tfQFetch in aTraceFlags)
then
InterlockedIncrement(FQFetchReaderCount^);
if (tfConnect in TraceFlags) and not (tfConnect in aTraceFlags)
then
InterlockedDecrement(FConnectReaderCount^)
else
if (not (tfConnect in TraceFlags)) and (tfConnect in aTraceFlags)
then
InterlockedIncrement(FConnectReaderCount^);
if (tfTransact in TraceFlags) and not (tfTransact in aTraceFlags)
then
InterlockedDecrement(FTransactReaderCount^)
else
if (not (tfTransact in TraceFlags)) and (tfTransact in aTraceFlags)
then
InterlockedIncrement(FTransactReaderCount^);
end;
fTraceFlags:=aTraceFlags
end;
{ TFIBSQLMonitorHook }
constructor TFIBSQLMonitorHook.Create;
begin
inherited Create;
vEventsCreated := false;
FActive := true;
if not vEventsCreated then
try
CreateEvents;
except
Enabled := false;
Exit;
end;
end;
procedure TFIBSQLMonitorHook.CreateEvents;
var
Sa : TSecurityAttributes;
Sd : TSecurityDescriptor;
MapError: Integer;
{$IFDEF VER100}
const
SECURITY_DESCRIPTOR_REVISION = 1;
{$ENDIF}
function OpenLocalEvent(Idx: Integer): THandle;
begin
Result := OpenEvent(EVENT_ALL_ACCESS, true, PChar(MonitorHookNames[Idx]));
if Result = 0 then
FIBError(feCannotCreateSharedResource, [GetLastError]);
end;
function CreateLocalEvent(Idx: Integer; InitialState: Boolean): THandle;
begin
Result := CreateEvent(@sa, true, InitialState, PChar(MonitorHookNames[Idx]));
if Result = 0 then
FIBError(feCannotCreateSharedResource, [GetLastError]);
end;
begin
InitializeSecurityDescriptor(@Sd,SECURITY_DESCRIPTOR_REVISION);
SetSecurityDescriptorDacl(@Sd,true,nil,false);
Sa.nLength := SizeOf(Sa);
Sa.lpSecurityDescriptor := @Sd;
Sa.bInheritHandle := true;
FSharedBuffer := CreateFileMapping(INVALID_HANDLE_VALUE, @sa, PAGE_READWRITE,
0, cMonitorHookSize, PChar(MonitorHookNames[1]));
MapError:=GetLastError;
if MapError= ERROR_ALREADY_EXISTS then
begin
FSharedBuffer := OpenFileMapping(FILE_MAP_ALL_ACCESS, false, PChar(MonitorHookNames[1]));
if (FSharedBuffer = 0) then
FIBError(feCannotCreateSharedResource, [GetLastError]);
end
else
begin
FWriteLock := CreateMutex(@sa, False, PChar(MonitorHookNames[0]));
FWriteEvent := CreateLocalEvent(2, False);
FWriteFinishedEvent := CreateLocalEvent(3, True);
FReadEvent := CreateLocalEvent(4, False);
FReadFinishedEvent := CreateLocalEvent(5, False);
end;
FBuffer := MapViewOfFile(FSharedBuffer, FILE_MAP_ALL_ACCESS, 0, 0, 0);
if FBuffer = nil then
FIBError(feCannotCreateSharedResource, [GetLastError]);
FMonitorCount := PInteger(FBuffer + cMonitorHookSize - SizeOf(Integer));
FReaderCount := PInteger(PAnsiChar(FMonitorCount) - SizeOf(Integer));
FTraceDataType:= PInteger(PAnsiChar(FMonitorCount) - 2*SizeOf(Integer));
FBufferSize := PInteger(PAnsiChar(FMonitorCount) - 3*SizeOf(Integer));
FQPrepareReaderCount:=PInteger(PAnsiChar(FMonitorCount) - 4*SizeOf(Integer));
FQExecuteReaderCount:=PInteger(PAnsiChar(FMonitorCount) - 5*SizeOf(Integer));
FQFetchReaderCount :=PInteger(PAnsiChar(FMonitorCount) - 6*SizeOf(Integer));
FConnectReaderCount :=PInteger(PAnsiChar(FMonitorCount) - 7*SizeOf(Integer));
FTransactReaderCount:=PInteger(PAnsiChar(FMonitorCount) - 8*SizeOf(Integer));
FTimeStamp := PDateTime(PAnsiChar(FTransactReaderCount)- SizeOf(TDateTime));
FIsUnicodeVersion := PBoolean(PAnsiChar(FTimeStamp)- SizeOf(Byte));
FReserved := PByte(PAnsiChar(FIsUnicodeVersion)- SizeOf(Byte));
if MapError= ERROR_ALREADY_EXISTS then
begin
FWriteLock := OpenMutex(MUTEX_ALL_ACCESS, False, PChar(MonitorHookNames[0]));
FWriteEvent := OpenLocalEvent(2);
FWriteFinishedEvent := OpenLocalEvent(3);
FReadEvent := OpenLocalEvent(4);
FReadFinishedEvent := OpenLocalEvent(5);
end
else
begin
FMonitorCount^ :=0;
FReaderCount^ :=0;
FBufferSize^ :=0;
FQPrepareReaderCount^:=0;
FQExecuteReaderCount^:=0;
FQFetchReaderCount^ :=0;
FConnectReaderCount^ :=0;
FTransactReaderCount^:=0;
end;
if FMonitorCount^ < 0 then
FMonitorCount^ := 0;
if FReaderCount^ < 0 then
FReaderCount^ := 0;
vEventsCreated := true;
end;
function TFIBSQLMonitorHook.SQLString(k:integer):Byte;
begin
Result:=127
end;
procedure TFIBSQLMonitorHook.DBConnect(db: TFIBDatabase);
var
st : String;
begin
if FActive and bEnabledMonitoring and (GetMonitorCount>0)
and (FConnectReaderCount^>0)
then
begin
st := db.Name + ': [Connect]'; {do not localize}
WriteSQLData(st, tfConnect);
end;
end;
procedure TFIBSQLMonitorHook.DBDisconnect(db: TFIBDatabase);
var
st: String;
begin
if FActive and bEnabledMonitoring and (GetMonitorCount>0)
and (FConnectReaderCount^>0)
then
begin
st := db.Name + ': [Disconnect]'; {do not localize}
WriteSQLData(st, tfConnect);
end;
end;
destructor TFIBSQLMonitorHook.Destroy;
begin
if vEventsCreated then
begin
UnmapViewOfFile(FBuffer);
CloseHandle(FSharedBuffer);
CloseHandle(FWriteEvent);
CloseHandle(FWriteFinishedEvent);
CloseHandle(FReadEvent);
CloseHandle(FReadFinishedEvent);
CloseHandle(FWriteLock);
end;
inherited Destroy;
end;
function TFIBSQLMonitorHook.GetEnabled: Boolean;
begin
Result := FActive;
end;
function TFIBSQLMonitorHook.GetMonitorCount: Integer;
begin
if FMonitorCount=nil
then
Result:=0
else
Result := FMonitorCount^;
end;
procedure TFIBSQLMonitorHook.RegisterMonitor(SQLMonitor: TFIBCustomSQLMonitor);
begin
if not vEventsCreated then
try
CreateEvents;
except
SQLMonitor.Active := false;
end;
if not Assigned(FFIBReaderThread) then
FFIBReaderThread := TMonitorReaderThread.Create;
FFIBReaderThread.AddMonitor(SQLMonitor);
end;
procedure TFIBSQLMonitorHook.ReleaseMonitor(Arg: TFIBCustomSQLMonitor);
begin
FFIBWriterThread.ReleaseMonitor(Arg.FHWnd);
end;
procedure TFIBSQLMonitorHook.SendMisc(Msg: String);
begin
if FActive then
WriteSQLData(Msg, tfMisc);
end;
{$IFDEF INC_SERVICE_SUPPORT}
procedure TFIBSQLMonitorHook.ServiceAttach(service: TpFIBCustomService);
var
st: String;
begin
if FActive and bEnabledMonitoring and (GetMonitorCount>0)
then
begin
st := service.Name + ': [Attach]'; {do not localize}
WriteSQLData(st, tfService);
end;
end;
procedure TFIBSQLMonitorHook.ServiceDetach(service: TpFIBCustomService);
var
st: String;
begin
if FActive and bEnabledMonitoring and (GetMonitorCount>0)
then
begin
st := service.Name + ': [Detach]'; {do not localize}
WriteSQLData(st, tfService);
end;
end;
procedure TFIBSQLMonitorHook.ServiceQuery(service: TpFIBCustomService);
var
st: String;
begin
if FActive and bEnabledMonitoring and (GetMonitorCount>0)
then
begin
st := service.Name + ': [Query]'; {do not localize}
WriteSQLData(st, tfService);
end;
end;
procedure TFIBSQLMonitorHook.ServiceStart(service: TpFIBCustomService);
var
st: String;
begin
if FActive and bEnabledMonitoring and (GetMonitorCount>0)
then
begin
st := service.Name + ': [Start]'; {do not localize}
WriteSQLData(st, tfService);
end;
end;
{$ENDIF}
procedure TFIBSQLMonitorHook.SetEnabled(const Value: Boolean);
begin
if FActive <> Value then
FActive := Value;
if (not FActive) and (Assigned(FFIBWriterThread)) then
begin
FFIBWriterThread.Terminate;
FFIBWriterThread.WaitFor;
FFIBWriterThread.Free;
FFIBWriterThread:=nil;
end;
end;
procedure TFIBSQLMonitorHook.SQLExecute(qry: TFIBQuery;const AdditionalMessage:string );
var
st: Ansistring;
i: Integer;
Q: TISC_QUAD;
begin
if FActive and bEnabledMonitoring and (GetMonitorCount>0)
and (FQExecuteReaderCount^>0)
then
begin
if qry.Owner is TFIBCustomDataSet then
st := TFIBCustomDataSet(qry.Owner).Name +'.'+qry.Name
else
st := qry.Name;
st := st + ': [Execute] ' + UTF8Encode(qry.ReadySQLText(False)); {do not localize}
if qry.Params.Count > 0 then
begin
for i := 0 to qry.Params.Count - 1 do
with qry.Params[i] do
begin
st := st + CRLF + ' ' + Name + ' = ';
try
if IsNull then
st := st + '<NULL>' {do not localize}
else
if (SQLType = (SQL_TEXT)) or (SQLType =(SQL_VARYING)) then
st := st +''''+ UTF8Encode(AsString)+''''
else
if ((SQLType and (not 1))= SQL_BLOB) then
begin
Q:=AsQuad;
st := st + '<BLOB> (BLOB_ID='+IntToStr(Q.gds_quad_high)+','+IntToStr(Q.gds_quad_low)+')'
end
else
if ((SQLType and (not 1)) =(SQL_ARRAY)) then
st := st + '<ARRAY>'
else
st := st + AsString;
except
st := st + '<Can''t print value>';
end;
end;
end;
if qry.SQLType in [SQLInsert, SQLUpdate, SQLDelete] then
st:=st + CRLF + 'Rows Affected: ' +IntToStr(qry.RowsAffected);
if Length(AdditionalMessage )>0 then
st:=st +CRLF +AdditionalMessage;
st:=st +CRLF +'Execute tick count '+ IntToStr(qry.CallTime);
// ast:=Utf8Encode( st);
WriteSQLData( st, tfQExecute);
// WriteSQLData(st, tfQExecute);
end;
end;
procedure TFIBSQLMonitorHook.SQLFetch(qry: TFIBQuery);
var
st: AnsiString;
i:integer;
begin
if FActive and bEnabledMonitoring and (GetMonitorCount>0)
and (FQFetchReaderCount^>0)
then
begin
if qry.Owner is TFIBCustomDataSet then
st := TFIBCustomDataSet(qry.Owner).Name
else
st := qry.Name;
st := st + ': [Fetch] ' + UTF8Encode(qry.ReadySQLText(False)); {do not localize}
for i:=0 to Pred(qry.Current.Count) do
begin
st:=st+qry.Fields[i].Name+' = ';
if qry.Fields[i].IsNull then
st := st + 'NULL'
else
st := st + UTF8Encode(qry.Fields[i].asWideString);
st:=st+CRLF;
end;
st:=CRLF+st;
if (qry.Eof) then
st := st + CRLF + ' End of file reached';
WriteSQLData(st, tfQFetch);
end;
end;
procedure TFIBSQLMonitorHook.SQLPrepare(qry: TFIBQuery);
var
st: AnsiString;
begin
if FActive and bEnabledMonitoring and (GetMonitorCount>0)
and (FQPrepareReaderCount^>0)
then
begin
if qry.Owner is TFIBCustomDataSet then
st := TFIBCustomDataSet(qry.Owner).Name
else
st := qry.Name;
st := st + ': [Prepare] ' + UTF8Encode(qry.ReadySQLText(False)) + CRLF; {do not localize}
try
st := st + ' Plan: ' + qry.Plan; {do not localize}
except
st := st + ' Plan: Can''t retrieve plan ';
end;
WriteSQLData(st, tfQPrepare);
end;
end;
procedure TFIBSQLMonitorHook.TRCommit(tr: TFIBTransaction);
var
st: String;
begin
if FActive and bEnabledMonitoring and (GetMonitorCount>0)
and (FTransactReaderCount^>0)
then
begin
if Assigned(tr.DefaultDatabase)
then
begin
st := tr.Name + ': [Commit (Hard commit)]('+
IntToStr(tr.TransactionID)+')';
WriteSQLData(st, tfTransact);
end;
end;
end;
procedure TFIBSQLMonitorHook.TRSavepoint(tr: TFIBTransaction;
const SavePointName:string; Operation:TSavePointOperation);
var
st: String;
begin
if FActive and bEnabledMonitoring and (GetMonitorCount>0)
and (FTransactReaderCount^>0)
then
begin
if Assigned(tr.DefaultDatabase)
then
begin
st:=tr.Name +': Transaction('+IntToStr(tr.TransactionID)+') -';
case Operation of
soSet:
st := st+' [SetSavePoint("'+SavePointName+'")]';
soRollBack:
st := st+' [RollBackToSavePoint("'+SavePointName+'")]';
soRelease:
st := st+' [ReleaseSavePoint("'+SavePointName+'")]';
end;
WriteSQLData(st, tfTransact);
end;
end;
end;
procedure TFIBSQLMonitorHook.TRCommitRetaining(tr: TFIBTransaction);
var
st: String;
begin
if FActive and bEnabledMonitoring and (GetMonitorCount>0)
and (FTransactReaderCount^>0)
then
begin
if Assigned(tr.DefaultDatabase)
then
begin
st := tr.Name + ': [Commit retaining (Soft commit)]('+
IntToStr(tr.TransactionID)+')';
WriteSQLData(st, tfTransact);
end;
end;
end;
procedure TFIBSQLMonitorHook.TRRollback(tr: TFIBTransaction);
var
st: String;
begin
if FActive and bEnabledMonitoring and (GetMonitorCount>0)
and (FTransactReaderCount^>0)
then
begin
if Assigned(tr.DefaultDatabase)
then
begin
st := tr.Name + ': [Rollback]('+
IntToStr(tr.TransactionID)+')';
WriteSQLData(st, tfTransact);
end;
end;
end;
procedure TFIBSQLMonitorHook.TRRollbackRetaining(tr: TFIBTransaction);
var
st: String;
begin
if FActive and bEnabledMonitoring and (GetMonitorCount>0)
and (FTransactReaderCount^>0)
then
begin
if Assigned(tr.DefaultDatabase)
then
begin
st := tr.Name + ': [Rollback retaining (Soft rollback)]('+
IntToStr(tr.TransactionID)+')';
WriteSQLData(st, tfTransact);
end;
end;
end;
procedure TFIBSQLMonitorHook.TRStart(tr: TFIBTransaction);
var
st: String;
begin
if FActive and bEnabledMonitoring and bEnabledMonitoring and (GetMonitorCount>0)
and (FTransactReaderCount^>0)
then
begin
if Assigned(tr.DefaultDatabase)
then
begin
st := tr.Name + ': [Start transaction]('+
IntToStr(tr.TransactionID)+')';
WriteSQLData(st, tfTransact);
end;
end;
end;
procedure TFIBSQLMonitorHook.UnregisterMonitor(SQLMonitor: TFIBCustomSQLMonitor);
begin
FFIBReaderThread.RemoveMonitor(SQLMonitor);
if FFIBReaderThread.FMonitors.Count = 0 then
begin
FFIBReaderThread.Terminate;
if not Assigned(FFIBWriterThread) then
begin
FFIBWriterThread := TMonitorWriterThread.Create;
end;
FFIBWriterThread.WriteSQLData(' ', tfMisc);
FFIBReaderThread.WaitFor;
FFIBReaderThread.Free;
FFIBReaderThread:=nil;
end;
end;
procedure TFIBSQLMonitorHook.WriteSQLData(const Text: String;
DataType: TFIBTraceFlag);
var
vText:string;
begin
if not vEventsCreated then
try
CreateEvents;
except
Enabled := false;
Exit;
end;
vText := CRLF + '[Application: ' + ExtractFileName(ParamStr(0))+ ']' + CRLF + Text; {do not localize}
if not Assigned(FFIBWriterThread) then
FFIBWriterThread := TMonitorWriterThread.Create;
FFIBWriterThread.WriteSQLData(vText, DataType);
end;
procedure TFIBSQLMonitorHook.TerminateWriteThread;
begin
if Assigned(FFIBWriterThread) then
begin
FFIBWriterThread.Free;
FFIBWriterThread:=nil
end;
end;
{ TMonitorWriterThread }
constructor TMonitorWriterThread.Create;
begin
StopExec:=False;
FMonitorMsgs := TList.Create;
inherited Create(False);
{ if FMonitorCount^ <> 0 then
Resume;}
{$IFNDEF D6+}
if FMonitorCount^ = 0 then
Suspend;
{$ENDIF}
end;
destructor TMonitorWriterThread.Destroy;
var Msg:TObject;
begin
{$IFNDEF D6+}
Resume;
{$ENDIF}
inherited Destroy;
if FMonitorMsgs.Count>0 then
begin
Msg:=FMonitorMsgs[0];
FMonitorMsgs.Delete(0);
Msg.Free;
end;
FMonitorMsgs.Free;
end;
procedure TMonitorWriterThread.Execute;
begin
while (((not Terminated) and (not bDone)) or
(FMonitorMsgs.Count <> 0)) and not StopExec do
begin
if (FMonitorCount^ = 0) then
begin
while FMonitorMsgs.Count <> 0 do
begin
TObject(FMonitorMsgs[0]).Free;
FMonitorMsgs.Delete(0);
// FMonitorMsgs.Remove(FMonitorMsgs[0]);
end;
{$IFNDEF D6+}
Suspend;
{$ELSE}
Sleep(50)
{$ENDIF}
end
else
if FMonitorMsgs.Count <> 0 then
begin
if (TObject(FMonitorMsgs.Items[0]) is TReleaseObject)
//or (not bEnabledMonitoring )
then
PostMessage(TReleaseObject(FMonitorMsgs.Items[0]).FHandle, CM_RELEASE, 0, 0)
else
begin
if bEnabledMonitoring then
WriteToBuffer
else
begin
// WriteToBuffer;
BeginWrite;
TFIBTraceObject(FMonitorMsgs[0]).Free;
FMonitorMsgs.Delete(0);
EndWrite;
end;
end;
end
else
{$IFNDEF D6+}
Suspend
{$ELSE}
Sleep(50)
{$ENDIF}
end;
end;
procedure TMonitorWriterThread.Lock;
begin