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{************************************************************************}
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{ }
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{ Borland Delphi Visual Component Library }
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{ InterBase Express core components }
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{ }
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{ Copyright (c) 1998-2000 Inprise Corporation }
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{ }
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{ InterBase Express is based in part on the product }
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{ Free IB Components, written by Gregory H. Deatz for }
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{ Hoagland, Longo, Moran, Dunst & Doukas Company. }
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{ Free IB Components is used under license. }
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{ }
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{ The contents of this file are subject to the InterBase }
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{ Public License Version 1.0 (the "License"); you may not }
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{ use this file except in compliance with the License. You }
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{ may obtain a copy of the License at http://www.Inprise.com/IPL.html }
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{ Software distributed under the License is distributed on }
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{ an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either }
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{ express or implied. See the License for the specific language }
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{ governing rights and limitations under the License. }
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{ The Original Code was created by InterBase Software Corporation }
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{ and its successors. }
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{ Portions created by Inprise Corporation are Copyright (C) Inprise }
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{ Corporation. All Rights Reserved. }
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{ Contributor(s): Jeff Overcash }
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{ }
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{ IBX For Lazarus (Firebird Express) }
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{ Contributor: Tony Whyman, MWA Software http://www.mwasoftware.co.uk }
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{ Portions created by MWA Software are copyright McCallum Whyman }
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{ Associates Ltd 2011 }
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{ }
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{************************************************************************}
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{
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This unit has been significantly revised for the Lazarus port. Specially,
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there was a need to re-organise the code to isolate the Windows specific
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IPC and to introduce SV5 IPC as an alternative for Linux and other platforms.
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}
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unit IBSQLMonitor;
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{$Mode Delphi}
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{$IF FPC_FULLVERSION >= 20700 }
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{$codepage UTF8}
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{$ENDIF}
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interface
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uses
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IB, IBUtils, IBSQL, IBCustomDataSet, IBDatabase, IBServices, IBXConst,SysUtils,
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Classes,
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{$IFDEF WINDOWS }
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Windows
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{$ELSE}
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unix
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{$ENDIF}
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;
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{Note that the original inter-thread communication between the Reader Thread and
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the ISQL Monitor used the Windows PostMessage interface. This is currently not
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useable under the FPC RTL as AllocateHWnd is not functional. It has been replaced
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by the use of the Synchronize method.}
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{$IFDEF WINDOWS}
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{$DEFINE USE_WINDOWS_IPC}
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{$ENDIF}
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{$IFDEF UNIX}
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{$DEFINE USE_SV5_IPC}
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{$ENDIF}
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{$IFDEF LINUX}
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{$DEFINE HAS_SEMTIMEDOP}
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{$ENDIF}
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type
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TIBCustomSQLMonitor = class;
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TSQLEvent = procedure(EventText: String; EventTime : TDateTime) of object;
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{ TIBCustomSQLMonitor }
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TIBCustomSQLMonitor = class(TComponent)
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private
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FOnSQLEvent: TSQLEvent;
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FTraceFlags: TTraceFlags;
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FEnabled: Boolean;
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procedure SetEnabled(const Value: Boolean);
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protected
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procedure ReleaseObject; {Called from Writer Thread}
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procedure ReceiveMessage(Msg: TObject); {Called from Reader Thread}
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property OnSQL: TSQLEvent read FOnSQLEvent write FOnSQLEvent;
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property TraceFlags: TTraceFlags read FTraceFlags write FTraceFlags;
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property Enabled : Boolean read FEnabled write SetEnabled default true;
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public
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constructor Create(AOwner: TComponent); override;
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destructor Destroy; override;
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procedure Release;
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end;
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{ TIBSQLMonitor }
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TIBSQLMonitor = class(TIBCustomSQLMonitor)
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published
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property OnSQL;
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property TraceFlags;
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property Enabled;
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end;
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IIBSQLMonitorHook = interface
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['{CF65434C-9B75-4298-BA7E-E6B85B3C769D}']
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procedure RegisterMonitor(SQLMonitor : TIBCustomSQLMonitor);
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procedure UnregisterMonitor(SQLMonitor : TIBCustomSQLMonitor);
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procedure ReleaseMonitor(Arg : TIBCustomSQLMonitor);
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procedure SQLPrepare(qry: TIBSQL);
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procedure SQLExecute(qry: TIBSQL);
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procedure SQLFetch(qry: TIBSQL);
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procedure DBConnect(db: TIBDatabase);
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procedure DBDisconnect(db: TIBDatabase);
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procedure TRStart(tr: TIBTransaction);
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procedure TRCommit(tr: TIBTransaction);
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procedure TRCommitRetaining(tr: TIBTransaction);
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procedure TRRollback(tr: TIBTransaction);
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procedure TRRollbackRetaining(tr: TIBTransaction);
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procedure ServiceAttach(service: TIBCustomService);
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procedure ServiceDetach(service: TIBCustomService);
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procedure ServiceQuery(service: TIBCustomService);
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procedure ServiceStart(service: TIBCustomService);
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procedure SendMisc(Msg : String);
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function GetTraceFlags : TTraceFlags;
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function GetMonitorCount : Integer;
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procedure SetTraceFlags(const Value : TTraceFlags);
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function GetEnabled : boolean;
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procedure SetEnabled(const Value : Boolean);
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property TraceFlags: TTraceFlags read GetTraceFlags write SetTraceFlags;
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property Enabled : Boolean read GetEnabled write SetEnabled;
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end;
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function MonitorHook: IIBSQLMonitorHook;
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procedure EnableMonitoring;
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procedure DisableMonitoring;
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function MonitoringEnabled: Boolean;
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implementation
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uses
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contnrs, syncobjs, CustApp
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{$IFDEF USE_SV5_IPC}
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,ipc, Errors, baseunix
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{$IF FPC_FULLVERSION <= 20402 } , initc {$ENDIF}
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{$ENDIF};
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{$IF FPC_FULLVERSION < 20600 }{$STATIC ON} {$ENDIF}
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const
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cMonitorHookSize = 1024;
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cMsgWaitTime = 1000;
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cWriteMessageAvailable = 'WriterMsgQueue';
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type
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{ There are two possible objects. One is a trace message object.
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This object holds the flag of the trace type plus the message.
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The second object is a Release object. It holds the handle that
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the CM_RELEASE message is to be queued to. }
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{ TTraceObject }
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TTraceObject = Class(TObject)
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FDataType : TTraceFlag;
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FMsg : String;
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FTimeStamp : TDateTime;
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public
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constructor Create(Msg : String; DataType : TTraceFlag); overload;
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constructor Create(obj : TTraceObject); overload;
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constructor Create(obj : TTraceObject; MsgOffset, MsgLen: integer); overload;
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end;
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{ TReleaseObject }
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TReleaseObject = Class(TObject)
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FMonitor : TIBCustomSQLMonitor;
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public
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constructor Create(Monitor : TIBCustomSQLMonitor);
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end;
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{$IFDEF USE_SV5_IPC}
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{$I sv5ipc.inc}
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{$ENDIF}
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{$IFDEF USE_WINDOWS_IPC}
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{$I winipc.inc}
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{$ENDIF}
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type
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{ TIBSQLMonitorHook }
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TIBSQLMonitorHook = class(TInterfacedObject, IIBSQLMonitorHook)
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private
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FGlobalInterface: TGlobalInterface;
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FTraceFlags: TTraceFlags;
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FEnabled: Boolean;
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protected
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procedure WriteSQLData(Text: String; DataType: TTraceFlag);
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public
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constructor Create;
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destructor Destroy; override;
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procedure RegisterMonitor(SQLMonitor : TIBCustomSQLMonitor);
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procedure UnregisterMonitor(SQLMonitor : TIBCustomSQLMonitor);
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procedure ReleaseMonitor(Arg : TIBCustomSQLMonitor);
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procedure SQLPrepare(qry: TIBSQL); virtual;
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procedure SQLExecute(qry: TIBSQL); virtual;
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procedure SQLFetch(qry: TIBSQL); virtual;
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procedure DBConnect(db: TIBDatabase); virtual;
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procedure DBDisconnect(db: TIBDatabase); virtual;
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procedure TRStart(tr: TIBTransaction); virtual;
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procedure TRCommit(tr: TIBTransaction); virtual;
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procedure TRCommitRetaining(tr: TIBTransaction); virtual;
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procedure TRRollback(tr: TIBTransaction); virtual;
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procedure TRRollbackRetaining(tr: TIBTransaction); virtual;
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procedure ServiceAttach(service: TIBCustomService); virtual;
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procedure ServiceDetach(service: TIBCustomService); virtual;
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procedure ServiceQuery(service: TIBCustomService); virtual;
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procedure ServiceStart(service: TIBCustomService); virtual;
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procedure SendMisc(Msg : String);
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function GetEnabled: Boolean;
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function GetTraceFlags: TTraceFlags;
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function GetMonitorCount : Integer;
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procedure SetEnabled(const Value: Boolean);
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procedure SetTraceFlags(const Value: TTraceFlags);
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procedure ForceRelease;
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property TraceFlags: TTraceFlags read GetTraceFlags write SetTraceFlags;
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property Enabled : Boolean read GetEnabled write SetEnabled default true;
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end;
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{ TWriterThread }
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TWriterThread = class(TThread)
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private
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{ Private declarations }
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FGlobalInterface: TGlobalInterface;
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FMsgs : TObjectList;
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FCriticalSection: TCriticalSection;
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FMsgAvailable: TEventObject;
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procedure RemoveFromList;
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procedure PostRelease;
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public
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procedure ReleaseMonitor(Arg : TIBCustomSQLMonitor);
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protected
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procedure BeginWrite;
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procedure EndWrite;
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procedure Execute; override;
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procedure WriteToBuffer;
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public
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constructor Create(GlobalInterface: TGlobalInterface);
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destructor Destroy; override;
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procedure WriteSQLData(Msg : String; DataType : TTraceFlag);
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end;
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{ TReaderThread }
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TReaderThread = class(TThread)
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private
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{ Private declarations }
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st : TTraceObject;
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FMonitors : TObjectList;
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FGlobalInterface: TGlobalInterface;
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FCriticalSection: TCriticalSection;
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procedure AlertMonitors;
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protected
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procedure BeginRead;
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procedure EndRead;
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procedure ReadSQLData;
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procedure Execute; override;
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public
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constructor Create(GlobalInterface: TGlobalInterface);
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destructor Destroy; override;
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procedure AddMonitor(Arg : TIBCustomSQLMonitor);
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procedure RemoveMonitor(Arg : TIBCustomSQLMonitor);
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end;
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var
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FWriterThread : TWriterThread;
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FReaderThread : TReaderThread;
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_MonitorHook: TIBSQLMonitorHook;
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bDone: Boolean;
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CS : TCriticalSection;
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const
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ApplicationTitle: string = 'Unknown';
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{ TIBCustomSQLMonitor }
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constructor TIBCustomSQLMonitor.Create(AOwner: TComponent);
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var aParent: TComponent;
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begin
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inherited Create(AOwner);
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FTraceFlags := [tfqPrepare .. tfMisc];
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if not (csDesigning in ComponentState) then
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begin
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aParent := AOwner;
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while aParent <> nil do
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begin
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if aParent is TCustomApplication then
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begin
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ApplicationTitle := TCustomApplication(aParent).Title;
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break;
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end;
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aParent := aParent.Owner;
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end;
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MonitorHook.RegisterMonitor(self);
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end;
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FEnabled := true;
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end;
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destructor TIBCustomSQLMonitor.Destroy;
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begin
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if not (csDesigning in ComponentState) then
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begin
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if FEnabled and assigned(_MonitorHook) then
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MonitorHook.UnregisterMonitor(self);
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end;
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inherited Destroy;
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end;
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procedure TIBCustomSQLMonitor.Release;
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begin
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MonitorHook.ReleaseMonitor(self);
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end;
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procedure TIBCustomSQLMonitor.ReleaseObject;
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begin
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Free
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end;
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procedure TIBCustomSQLMonitor.ReceiveMessage(Msg: TObject);
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var
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st: TTraceObject;
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begin
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st := (Msg as TTraceObject);
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if (Assigned(FOnSQLEvent)) and
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(st.FDataType in FTraceFlags) then
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FOnSQLEvent(st.FMsg, st.FTimeStamp);
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st.Free;
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end;
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procedure TIBCustomSQLMonitor.SetEnabled(const Value: Boolean);
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begin
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if Value <> FEnabled then
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begin
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FEnabled := Value;
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if not (csDesigning in ComponentState) then
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if FEnabled then
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Monitorhook.RegisterMonitor(self)
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else
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MonitorHook.UnregisterMonitor(self);
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end;
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end;
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{ TIBSQLMonitorHook }
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constructor TIBSQLMonitorHook.Create;
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begin
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inherited Create;
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FTraceFlags := [tfQPrepare..tfMisc];
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FEnabled := false;
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end;
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destructor TIBSQLMonitorHook.Destroy;
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begin
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if assigned(FGlobalInterface) then FGlobalInterface.Free;
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inherited Destroy;
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end;
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procedure TIBSQLMonitorHook.DBConnect(db: TIBDatabase);
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var
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st : String;
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begin
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if FEnabled then
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begin
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if not (tfConnect in FTraceFlags * db.TraceFlags) then
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Exit;
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st := db.Name + ': [Connect]'; {do not localize}
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WriteSQLData(st, tfConnect);
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end;
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end;
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procedure TIBSQLMonitorHook.DBDisconnect(db: TIBDatabase);
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var
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st: String;
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begin
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if (Self = nil) then exit;
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if FEnabled then
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begin
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397 |
if not (tfConnect in FTraceFlags * db.TraceFlags) then
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Exit;
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st := db.Name + ': [Disconnect]'; {do not localize}
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WriteSQLData(st, tfConnect);
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end;
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end;
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403 |
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function TIBSQLMonitorHook.GetEnabled: Boolean;
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begin
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Result := FEnabled;
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end;
|
408 |
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function TIBSQLMonitorHook.GetMonitorCount: Integer;
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begin
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Result := FGlobalInterface.MonitorCount
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end;
|
413 |
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function TIBSQLMonitorHook.GetTraceFlags: TTraceFlags;
|
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begin
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Result := FTraceFlags;
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end;
|
418 |
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procedure TIBSQLMonitorHook.RegisterMonitor(SQLMonitor: TIBCustomSQLMonitor);
|
420 |
begin
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421 |
{$IFDEF DEBUG}writeln('Register Monitor');{$ENDIF}
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422 |
if not assigned(FGlobalInterface) then
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423 |
FGlobalInterface := TGlobalInterface.Create;
|
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if not Assigned(FReaderThread) then
|
425 |
FReaderThread := TReaderThread.Create(FGlobalInterface);
|
426 |
FReaderThread.AddMonitor(SQLMonitor);
|
427 |
end;
|
428 |
|
429 |
procedure TIBSQLMonitorHook.ReleaseMonitor(Arg: TIBCustomSQLMonitor);
|
430 |
begin
|
431 |
FWriterThread.ReleaseMonitor(Arg);
|
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end;
|
433 |
|
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procedure TIBSQLMonitorHook.SendMisc(Msg: String);
|
435 |
begin
|
436 |
if FEnabled then
|
437 |
begin
|
438 |
WriteSQLData(Msg, tfMisc);
|
439 |
end;
|
440 |
end;
|
441 |
|
442 |
procedure TIBSQLMonitorHook.ServiceAttach(service: TIBCustomService);
|
443 |
var
|
444 |
st: String;
|
445 |
begin
|
446 |
if FEnabled then
|
447 |
begin
|
448 |
if not (tfService in (FTraceFlags * service.TraceFlags)) then
|
449 |
Exit;
|
450 |
st := service.Name + ': [Attach]'; {do not localize}
|
451 |
WriteSQLData(st, tfService);
|
452 |
end;
|
453 |
end;
|
454 |
|
455 |
procedure TIBSQLMonitorHook.ServiceDetach(service: TIBCustomService);
|
456 |
var
|
457 |
st: String;
|
458 |
begin
|
459 |
if FEnabled then
|
460 |
begin
|
461 |
if not (tfService in (FTraceFlags * service.TraceFlags)) then
|
462 |
Exit;
|
463 |
st := service.Name + ': [Detach]'; {do not localize}
|
464 |
WriteSQLData(st, tfService);
|
465 |
end;
|
466 |
end;
|
467 |
|
468 |
procedure TIBSQLMonitorHook.ServiceQuery(service: TIBCustomService);
|
469 |
var
|
470 |
st: String;
|
471 |
begin
|
472 |
if FEnabled then
|
473 |
begin
|
474 |
if not (tfService in (FTraceFlags * service.TraceFlags)) then
|
475 |
Exit;
|
476 |
st := service.Name + ': [Query]'; {do not localize}
|
477 |
WriteSQLData(st, tfService);
|
478 |
end;
|
479 |
end;
|
480 |
|
481 |
procedure TIBSQLMonitorHook.ServiceStart(service: TIBCustomService);
|
482 |
var
|
483 |
st: String;
|
484 |
begin
|
485 |
if FEnabled then
|
486 |
begin
|
487 |
if not (tfService in (FTraceFlags * service.TraceFlags)) then
|
488 |
Exit;
|
489 |
st := service.Name + ': [Start]'; {do not localize}
|
490 |
WriteSQLData(st, tfService);
|
491 |
end;
|
492 |
end;
|
493 |
|
494 |
procedure TIBSQLMonitorHook.SetEnabled(const Value: Boolean);
|
495 |
begin
|
496 |
if FEnabled <> Value then
|
497 |
FEnabled := Value;
|
498 |
if (not FEnabled) and (Assigned(FWriterThread)) then
|
499 |
begin
|
500 |
FWriterThread.Terminate;
|
501 |
FWriterThread.WaitFor;
|
502 |
FreeAndNil(FWriterThread);
|
503 |
end;
|
504 |
end;
|
505 |
|
506 |
procedure TIBSQLMonitorHook.SetTraceFlags(const Value: TTraceFlags);
|
507 |
begin
|
508 |
FTraceFlags := Value
|
509 |
end;
|
510 |
|
511 |
procedure TIBSQLMonitorHook.ForceRelease;
|
512 |
begin
|
513 |
if Assigned(FReaderThread) then
|
514 |
begin
|
515 |
FReaderThread.Terminate;
|
516 |
if not Assigned(FWriterThread) then
|
517 |
FWriterThread := TWriterThread.Create(FGlobalInterface);
|
518 |
FWriterThread.WriteSQLData(' ', tfMisc);
|
519 |
end;
|
520 |
end;
|
521 |
|
522 |
procedure TIBSQLMonitorHook.SQLExecute(qry: TIBSQL);
|
523 |
var
|
524 |
st: String;
|
525 |
i: Integer;
|
526 |
begin
|
527 |
if FEnabled then
|
528 |
begin
|
529 |
if not ((tfQExecute in (FTraceFlags * qry.Database.TraceFlags)) or
|
530 |
(tfStmt in (FTraceFlags * qry.Database.TraceFlags)) ) then
|
531 |
Exit;
|
532 |
if qry.Owner is TIBCustomDataSet then
|
533 |
st := TIBCustomDataSet(qry.Owner).Name
|
534 |
else
|
535 |
st := qry.Name;
|
536 |
st := st + ': [Execute] ' + qry.SQL.Text; {do not localize}
|
537 |
if qry.Params.Count > 0 then begin
|
538 |
for i := 0 to qry.Params.Count - 1 do begin
|
539 |
st := st + CRLF + ' ' + qry.Params[i].Name + ' = ';
|
540 |
try
|
541 |
if qry.Params[i].IsNull then
|
542 |
st := st + '<NULL>'; {do not localize}
|
543 |
st := st + qry.Params[i].AsString;
|
544 |
except
|
545 |
st := st + '<' + SCantPrintValue + '>';
|
546 |
end;
|
547 |
end;
|
548 |
end;
|
549 |
WriteSQLData(st, tfQExecute);
|
550 |
end;
|
551 |
end;
|
552 |
|
553 |
procedure TIBSQLMonitorHook.SQLFetch(qry: TIBSQL);
|
554 |
var
|
555 |
st: String;
|
556 |
begin
|
557 |
if FEnabled then
|
558 |
begin
|
559 |
if not ((tfQFetch in (FTraceFlags * qry.Database.TraceFlags)) or
|
560 |
(tfStmt in (FTraceFlags * qry.Database.TraceFlags))) then
|
561 |
Exit;
|
562 |
if qry.Owner is TIBCustomDataSet then
|
563 |
st := TIBCustomDataSet(qry.Owner).Name
|
564 |
else
|
565 |
st := qry.Name;
|
566 |
st := st + ': [Fetch] ' + qry.SQL.Text; {do not localize}
|
567 |
if (qry.EOF) then
|
568 |
st := st + CRLF + ' ' + SEOFReached;
|
569 |
WriteSQLData(st, tfQFetch);
|
570 |
end;
|
571 |
end;
|
572 |
|
573 |
procedure TIBSQLMonitorHook.SQLPrepare(qry: TIBSQL);
|
574 |
var
|
575 |
st: String;
|
576 |
begin
|
577 |
if FEnabled then
|
578 |
begin
|
579 |
if not ((tfQPrepare in (FTraceFlags * qry.Database.TraceFlags)) or
|
580 |
(tfStmt in (FTraceFlags * qry.Database.TraceFlags))) then
|
581 |
Exit;
|
582 |
if qry.Owner is TIBCustomDataSet then
|
583 |
st := TIBCustomDataSet(qry.Owner).Name
|
584 |
else
|
585 |
st := qry.Name;
|
586 |
st := st + ': [Prepare] ' + qry.SQL.Text + CRLF; {do not localize}
|
587 |
st := st + ' Plan: ' + qry.Plan; {do not localize}
|
588 |
WriteSQLData(st, tfQPrepare);
|
589 |
end;
|
590 |
end;
|
591 |
|
592 |
procedure TIBSQLMonitorHook.TRCommit(tr: TIBTransaction);
|
593 |
var
|
594 |
st: String;
|
595 |
begin
|
596 |
if FEnabled then
|
597 |
begin
|
598 |
if Assigned(tr.DefaultDatabase) and
|
599 |
(not (tfTransact in (FTraceFlags * tr.DefaultDatabase.TraceFlags))) then
|
600 |
Exit;
|
601 |
st := tr.Name + ': [Commit (Hard commit)]'; {do not localize}
|
602 |
WriteSQLData(st, tfTransact);
|
603 |
end;
|
604 |
end;
|
605 |
|
606 |
procedure TIBSQLMonitorHook.TRCommitRetaining(tr: TIBTransaction);
|
607 |
var
|
608 |
st: String;
|
609 |
begin
|
610 |
if FEnabled then
|
611 |
begin
|
612 |
if Assigned(tr.DefaultDatabase) and
|
613 |
(not (tfTransact in (FTraceFlags * tr.DefaultDatabase.TraceFlags))) then
|
614 |
Exit;
|
615 |
st := tr.Name + ': [Commit retaining (Soft commit)]'; {do not localize}
|
616 |
WriteSQLData(st, tfTransact);
|
617 |
end;
|
618 |
end;
|
619 |
|
620 |
procedure TIBSQLMonitorHook.TRRollback(tr: TIBTransaction);
|
621 |
var
|
622 |
st: String;
|
623 |
begin
|
624 |
if FEnabled then
|
625 |
begin
|
626 |
if Assigned(tr.DefaultDatabase) and
|
627 |
(not (tfTransact in (FTraceFlags * tr.DefaultDatabase.TraceFlags))) then
|
628 |
Exit;
|
629 |
st := tr.Name + ': [Rollback]'; {do not localize}
|
630 |
WriteSQLData(st, tfTransact);
|
631 |
end;
|
632 |
end;
|
633 |
|
634 |
procedure TIBSQLMonitorHook.TRRollbackRetaining(tr: TIBTransaction);
|
635 |
var
|
636 |
st: String;
|
637 |
begin
|
638 |
if FEnabled then
|
639 |
begin
|
640 |
if Assigned(tr.DefaultDatabase) and
|
641 |
(not (tfTransact in (FTraceFlags * tr.DefaultDatabase.TraceFlags))) then
|
642 |
Exit;
|
643 |
st := tr.Name + ': [Rollback retaining (Soft rollback)]'; {do not localize}
|
644 |
WriteSQLData(st, tfTransact);
|
645 |
end;
|
646 |
end;
|
647 |
|
648 |
procedure TIBSQLMonitorHook.TRStart(tr: TIBTransaction);
|
649 |
var
|
650 |
st: String;
|
651 |
begin
|
652 |
if FEnabled then
|
653 |
begin
|
654 |
if Assigned(tr.DefaultDatabase) and
|
655 |
(not (tfTransact in (FTraceFlags * tr.DefaultDatabase.TraceFlags))) then
|
656 |
Exit;
|
657 |
st := tr.Name + ': [Start transaction]'; {do not localize}
|
658 |
WriteSQLData(st, tfTransact);
|
659 |
end;
|
660 |
end;
|
661 |
|
662 |
procedure TIBSQLMonitorHook.UnregisterMonitor(SQLMonitor: TIBCustomSQLMonitor);
|
663 |
var
|
664 |
Created : Boolean;
|
665 |
begin
|
666 |
{$IFDEF DEBUG}writeln('Unregister Monitor');{$ENDIF}
|
667 |
if assigned(FReaderThread) then
|
668 |
begin
|
669 |
FReaderThread.RemoveMonitor(SQLMonitor);
|
670 |
if FReaderThread.FMonitors.Count = 0 then
|
671 |
begin
|
672 |
FReaderThread.Terminate;
|
673 |
|
674 |
{ There is a possibility of a reader thread, but no writer one.
|
675 |
When in that situation, the reader needs to be released after
|
676 |
the terminate is set. To do that, create a Writer thread, send
|
677 |
the release code (a string of ' ' and type tfMisc) and then free
|
678 |
it up. }
|
679 |
|
680 |
Created := false;
|
681 |
if not Assigned(FWriterThread) then
|
682 |
begin
|
683 |
FWriterThread := TWriterThread.Create(FGlobalInterface);
|
684 |
Created := true;
|
685 |
end;
|
686 |
FWriterThread.WriteSQLData(' ', tfMisc);
|
687 |
{$IFDEF DEBUG}writeln('Wait for read Terminate');{$ENDIF}
|
688 |
FReaderThread.WaitFor;
|
689 |
if assigned(FReaderThread.FatalException) then
|
690 |
IBError(ibxeThreadFailed,['Reader',Exception(FReaderThread.FatalException).Message]);
|
691 |
{$IFDEF DEBUG}writeln('Freeing Reader Thread');{$ENDIF}
|
692 |
FreeAndNil(FReaderThread);
|
693 |
{$IFDEF DEBUG}writeln('Reader Thread Freed');{$ENDIF}
|
694 |
if Created then
|
695 |
begin
|
696 |
FWriterThread.Terminate;
|
697 |
{$IFDEF DEBUG}writeln('Wait for write Terminate');{$ENDIF}
|
698 |
FWriterThread.WaitFor;
|
699 |
if assigned(FWriterThread.FatalException) then
|
700 |
IBError(ibxeThreadFailed,['Writer',Exception(FWriterThread.FatalException).Message]);
|
701 |
FreeAndNil(FWriterThread);
|
702 |
end;
|
703 |
end;
|
704 |
end;
|
705 |
{$IFDEF DEBUG}writeln('Unregister done'){$ENDIF}
|
706 |
end;
|
707 |
|
708 |
procedure TIBSQLMonitorHook.WriteSQLData(Text: String;
|
709 |
DataType: TTraceFlag);
|
710 |
begin
|
711 |
{$IFDEF DEBUG}writeln('Write SQL Data: '+Text);{$ENDIF}
|
712 |
if not assigned(FGlobalInterface) then
|
713 |
FGlobalInterface := TGlobalInterface.Create;
|
714 |
Text := CRLF + '[Application: ' + ApplicationTitle + ']' + CRLF + Text; {do not localize}
|
715 |
if not Assigned(FWriterThread) then
|
716 |
FWriterThread := TWriterThread.Create(FGLobalInterface);
|
717 |
FWriterThread.WriteSQLData(Text, DataType);
|
718 |
end;
|
719 |
|
720 |
{ TWriterThread }
|
721 |
|
722 |
constructor TWriterThread.Create(GlobalInterface: TGlobalInterface);
|
723 |
|
724 |
begin
|
725 |
inherited Create(true);
|
726 |
{$IFDEF DEBUG}writeln('Write Object Created');{$ENDIF}
|
727 |
FGlobalInterface := GlobalInterface;
|
728 |
FMsgs := TObjectList.Create(true);
|
729 |
FCriticalSection := TCriticalSection.Create;
|
730 |
FMsgAvailable := TEventObject.Create(FGlobalInterface.Sa,true,false,cWriteMessageAvailable);
|
731 |
Resume;
|
732 |
end;
|
733 |
|
734 |
destructor TWriterThread.Destroy;
|
735 |
begin
|
736 |
if assigned(FMsgs) then FMsgs.Free;
|
737 |
if assigned(FCriticalSection) then FCriticalSection.Free;
|
738 |
if assigned(FMsgAvailable) then FMsgAvailable.Free;
|
739 |
inherited Destroy;
|
740 |
end;
|
741 |
|
742 |
procedure TWriterThread.Execute;
|
743 |
begin
|
744 |
{$IFDEF DEBUG}writeln('Write Thread starts');{$ENDIF}
|
745 |
try
|
746 |
{ Place thread code here }
|
747 |
while ((not Terminated) and (not bDone)) or
|
748 |
(FMsgs.Count <> 0) do
|
749 |
begin
|
750 |
FMsgAvailable.WaitFor(cMsgWaitTime);
|
751 |
{ Any one listening? }
|
752 |
if FGlobalInterface.MonitorCount = 0 then
|
753 |
begin
|
754 |
if FMsgs.Count <> 0 then
|
755 |
begin
|
756 |
{$IFDEF DEBUG}writeln('Write Thread Drop Message');{$ENDIF}
|
757 |
RemoveFromList;
|
758 |
end;
|
759 |
end
|
760 |
else
|
761 |
{ Anything to process? }
|
762 |
if FMsgs.Count <> 0 then
|
763 |
begin
|
764 |
{ If the current queued message is a release release the object }
|
765 |
if FMsgs.Items[0] is TReleaseObject then
|
766 |
begin
|
767 |
{$IFDEF DEBUG}writeln('Post Release');{$ENDIF}
|
768 |
Synchronize(PostRelease);
|
769 |
end
|
770 |
else
|
771 |
{ Otherwise write the TraceObject to the buffer }
|
772 |
begin
|
773 |
WriteToBuffer;
|
774 |
end;
|
775 |
end
|
776 |
else
|
777 |
begin
|
778 |
FCriticalSection.Enter;
|
779 |
try
|
780 |
if FMsgs.Count = 0 then
|
781 |
FMsgAvailable.ResetEvent
|
782 |
finally
|
783 |
FCriticalSection.Leave
|
784 |
end;
|
785 |
end;
|
786 |
end;
|
787 |
except on E: Exception do
|
788 |
begin
|
789 |
{$IFDEF DEBUG}writeln('Write Thread raised Exception: ' + E.Message);{$ENDIF}
|
790 |
raise
|
791 |
end
|
792 |
end;
|
793 |
{$IFDEF DEBUG}writeln('Write Thread Ends');{$ENDIF}
|
794 |
end;
|
795 |
|
796 |
procedure TWriterThread.WriteSQLData(Msg : String; DataType: TTraceFlag);
|
797 |
begin
|
798 |
FCriticalSection.Enter;
|
799 |
try
|
800 |
FMsgs.Add(TTraceObject.Create(Msg, DataType));
|
801 |
finally
|
802 |
FCriticalSection.Leave;
|
803 |
end;
|
804 |
FMsgAvailable.SetEvent
|
805 |
end;
|
806 |
|
807 |
procedure TWriterThread.BeginWrite;
|
808 |
begin
|
809 |
{$IFDEF DEBUG}writeln('Begin Write');{$ENDIF}
|
810 |
with FGlobalInterface do
|
811 |
begin
|
812 |
ReadReadyEvent.PassThroughGate; {Wait for readers to become ready }
|
813 |
WriterBusyEvent.Lock; {Set Busy State}
|
814 |
end;
|
815 |
{$IFDEF DEBUG}writeln('Begin Write Complete');{$ENDIF}
|
816 |
end;
|
817 |
|
818 |
procedure TWriterThread.EndWrite;
|
819 |
begin
|
820 |
{$IFDEF DEBUG}writeln('End Write');{$ENDIF}
|
821 |
with FGlobalInterface do
|
822 |
begin
|
823 |
DataAvailableEvent.Unlock; { Signal Data Available. }
|
824 |
ReadFinishedEvent.PassThroughGate; {Wait for readers to finish }
|
825 |
DataAvailableEvent.Lock; {reset Data Available }
|
826 |
WriterBusyEvent.Unlock; {Signal not Busy }
|
827 |
end;
|
828 |
{$IFDEF DEBUG}writeln('End Write Complete');{$ENDIF}
|
829 |
end;
|
830 |
|
831 |
procedure TWriterThread.WriteToBuffer;
|
832 |
var I, len: integer;
|
833 |
Temp: TTraceObject;
|
834 |
begin
|
835 |
{$IFDEF DEBUG}writeln('Write to Buffer');{$ENDIF}
|
836 |
FGlobalInterface.WriteLock.Lock;
|
837 |
try
|
838 |
{ If there are no monitors throw out the message
|
839 |
The alternative is to have messages queue up until a
|
840 |
monitor is ready.}
|
841 |
|
842 |
if FGlobalInterface.MonitorCount = 0 then
|
843 |
RemoveFromList
|
844 |
else
|
845 |
begin
|
846 |
i := 1;
|
847 |
len := Length(TTraceObject(FMsgs[0]).FMsg);
|
848 |
if len <= FGlobalInterface.MaxBufferSize then
|
849 |
begin
|
850 |
BeginWrite;
|
851 |
try
|
852 |
FGlobalInterface.SendTrace(TTraceObject(FMsgs[0]))
|
853 |
finally
|
854 |
RemoveFromList;
|
855 |
EndWrite
|
856 |
end;
|
857 |
end
|
858 |
else
|
859 |
try
|
860 |
while len > 0 do
|
861 |
begin
|
862 |
{$IFDEF DEBUG}writeln('Sending Partial Message, len = ',len);{$ENDIF}
|
863 |
Temp := TTraceObject.Create(TTraceObject(FMsgs[0]),i,Min(len,FGlobalInterface.MaxBufferSize));
|
864 |
try
|
865 |
BeginWrite;
|
866 |
FGlobalInterface.SendTrace(Temp);
|
867 |
Inc(i,FGlobalInterface.MaxBufferSize);
|
868 |
Dec(len,FGlobalInterface.MaxBufferSize);
|
869 |
finally
|
870 |
Temp.Free;
|
871 |
EndWrite
|
872 |
end
|
873 |
end;
|
874 |
finally
|
875 |
RemoveFromList;
|
876 |
end
|
877 |
end;
|
878 |
finally
|
879 |
FGlobalInterface.WriteLock.Unlock;
|
880 |
end;
|
881 |
{$IFDEF DEBUG}writeln('Done Write');{$ENDIF}
|
882 |
end;
|
883 |
|
884 |
procedure TWriterThread.RemoveFromList;
|
885 |
begin
|
886 |
{$IFDEF DEBUG}writeln('Write Thread: Remove object From List');{$ENDIF}
|
887 |
FCriticalSection.Enter;
|
888 |
try
|
889 |
FMsgs.Remove(FMsgs[0]); { Pop the written item }
|
890 |
finally
|
891 |
FCriticalSection.Leave;
|
892 |
end;
|
893 |
end;
|
894 |
|
895 |
procedure TWriterThread.PostRelease;
|
896 |
var Monitor: TIBCustomSQLMonitor;
|
897 |
begin
|
898 |
Monitor := TReleaseObject(FMsgs.Items[0]).FMonitor;
|
899 |
Monitor.ReleaseObject
|
900 |
end;
|
901 |
|
902 |
procedure TWriterThread.ReleaseMonitor(Arg : TIBCustomSQLMonitor);
|
903 |
begin
|
904 |
FMsgs.Add(TReleaseObject.Create(Arg));
|
905 |
end;
|
906 |
|
907 |
{ TTraceObject }
|
908 |
|
909 |
constructor TTraceObject.Create(Msg : String; DataType: TTraceFlag);
|
910 |
begin
|
911 |
FMsg := Msg;
|
912 |
FDataType := DataType;
|
913 |
FTimeStamp := Now;
|
914 |
end;
|
915 |
|
916 |
constructor TTraceObject.Create(obj: TTraceObject);
|
917 |
begin
|
918 |
FMsg := obj.FMsg;
|
919 |
FDataType := obj.FDataType;
|
920 |
FTimeStamp := obj.FTimeStamp;
|
921 |
end;
|
922 |
|
923 |
constructor TTraceObject.Create(obj: TTraceObject; MsgOffset, MsgLen: integer);
|
924 |
begin
|
925 |
FDataType := obj.FDataType;
|
926 |
FTimeStamp := obj.FTimeStamp;
|
927 |
FMsg := copy(obj.FMsg,MsgOffset,MsgLen)
|
928 |
end;
|
929 |
|
930 |
{ TReleaseObject }
|
931 |
|
932 |
constructor TReleaseObject.Create(Monitor : TIBCustomSQLMonitor);
|
933 |
begin
|
934 |
FMonitor := Monitor;
|
935 |
end;
|
936 |
|
937 |
{ ReaderThread }
|
938 |
|
939 |
procedure TReaderThread.AddMonitor(Arg: TIBCustomSQLMonitor);
|
940 |
begin
|
941 |
FCriticalSection.Enter;
|
942 |
try
|
943 |
if FMonitors.IndexOf(Arg) < 0 then
|
944 |
FMonitors.Add(Arg);
|
945 |
finally
|
946 |
FCriticalSection.Leave
|
947 |
end;
|
948 |
end;
|
949 |
|
950 |
procedure TReaderThread.AlertMonitors;
|
951 |
var i : Integer;
|
952 |
FTemp : TTraceObject;
|
953 |
Monitor: TIBCustomSQLMonitor;
|
954 |
begin
|
955 |
for i := 0 to FMonitors.Count - 1 do
|
956 |
begin
|
957 |
{$IFDEF DEBUG}writeln('Sending Message to Monitor ' +IntToStr(i));{$ENDIF}
|
958 |
FTemp := TTraceObject.Create(st);
|
959 |
Monitor := TIBCustomSQLMonitor(FMonitors[i]);
|
960 |
Monitor.ReceiveMessage(FTemp);
|
961 |
end;
|
962 |
end;
|
963 |
|
964 |
procedure TReaderThread.BeginRead;
|
965 |
begin
|
966 |
{$IFDEF DEBUG}writeln('Begin Read');{$ENDIF}
|
967 |
with FGlobalInterface do
|
968 |
begin
|
969 |
WriterBusyEvent.PassthroughGate; { Wait for Writer not busy}
|
970 |
ReadFinishedEvent.Lock; { Prepare Read Finished Gate}
|
971 |
ReadReadyEvent.Unlock; { Signal read ready }
|
972 |
{$IFDEF DEBUG}writeln('Read Ready Unlocked');{$ENDIF}
|
973 |
DataAvailableEvent.PassthroughGate; { Wait for a Data Available }
|
974 |
end;
|
975 |
{$IFDEF DEBUG}writeln('Begin Read Complete');{$ENDIF}
|
976 |
end;
|
977 |
|
978 |
constructor TReaderThread.Create(GlobalInterface: TGlobalInterface);
|
979 |
begin
|
980 |
inherited Create(true);
|
981 |
FGlobalInterface := GlobalInterface;
|
982 |
st := TTraceObject.Create('', tfMisc);
|
983 |
FGlobalInterface.IncMonitorCount;
|
984 |
FMonitors := TObjectList.Create(false);
|
985 |
FCriticalSection := TCriticalSection.Create;
|
986 |
{$IFDEF DEBUG}writeln('Reader Thread Created');{$ENDIF}
|
987 |
FGlobalInterface.ReadReadyEvent.Lock; { Initialise Read Ready}
|
988 |
Resume;
|
989 |
end;
|
990 |
|
991 |
destructor TReaderThread.Destroy;
|
992 |
begin
|
993 |
{$IFDEF DEBUG}writeln('Reader Thread Destory');{$ENDIF}
|
994 |
FGlobalInterface.ReadReadyEvent.UnLock;
|
995 |
if assigned(FGlobalInterface) and (FGlobalInterface.MonitorCount > 0) then
|
996 |
FGlobalInterface.DecMonitorCount;
|
997 |
FMonitors.Free;
|
998 |
if assigned(FCriticalSection) then FCriticalSection.Free;
|
999 |
st.Free;
|
1000 |
inherited Destroy;
|
1001 |
end;
|
1002 |
|
1003 |
procedure TReaderThread.EndRead;
|
1004 |
begin
|
1005 |
{$IFDEF DEBUG}writeln('End Read');{$ENDIF}
|
1006 |
FGlobalInterface.ReadReadyEvent.Lock; { reset Read Ready}
|
1007 |
FGlobalInterface.ReadFinishedEvent.Unlock; {Signal Read completed }
|
1008 |
{$IFDEF DEBUG}writeln('End Read Complete');{$ENDIF}
|
1009 |
end;
|
1010 |
|
1011 |
procedure TReaderThread.Execute;
|
1012 |
begin
|
1013 |
{$IFDEF DEBUG}writeln('Read Thread Starts');{$ENDIF}
|
1014 |
{ Place thread code here }
|
1015 |
while (not Terminated) and (not bDone) do
|
1016 |
begin
|
1017 |
ReadSQLData;
|
1018 |
if (st.FMsg <> '') and
|
1019 |
not ((st.FMsg = ' ') and (st.FDataType = tfMisc)) then
|
1020 |
begin
|
1021 |
{$IFDEF DEBUG}writeln('Sending Message to Monitors');{$ENDIF}
|
1022 |
Synchronize(AlertMonitors);
|
1023 |
end;
|
1024 |
end;
|
1025 |
{$IFDEF DEBUG}writeln('Read Thread Ends');{$ENDIF}
|
1026 |
end;
|
1027 |
|
1028 |
procedure TReaderThread.ReadSQLData;
|
1029 |
begin
|
1030 |
st.FMsg := '';
|
1031 |
BeginRead;
|
1032 |
if not bDone then
|
1033 |
try
|
1034 |
FGlobalInterface.ReceiveTrace(st)
|
1035 |
finally
|
1036 |
EndRead;
|
1037 |
end;
|
1038 |
end;
|
1039 |
|
1040 |
procedure TReaderThread.RemoveMonitor(Arg: TIBCustomSQLMonitor);
|
1041 |
begin
|
1042 |
FCriticalSection.Enter;
|
1043 |
try
|
1044 |
FMonitors.Remove(Arg);
|
1045 |
finally
|
1046 |
FCriticalSection.Leave
|
1047 |
end;
|
1048 |
end;
|
1049 |
|
1050 |
{ Misc methods }
|
1051 |
|
1052 |
function MonitorHook: IIBSQLMonitorHook;
|
1053 |
begin
|
1054 |
if (_MonitorHook = nil) and (not bDone) then
|
1055 |
begin
|
1056 |
CS.Enter;
|
1057 |
if (_MonitorHook = nil) and (not bDone) then
|
1058 |
begin
|
1059 |
_MonitorHook := TIBSQLMonitorHook.Create;
|
1060 |
_MonitorHook._AddRef;
|
1061 |
end;
|
1062 |
CS.Leave;
|
1063 |
end;
|
1064 |
result := _MonitorHook;
|
1065 |
end;
|
1066 |
|
1067 |
procedure EnableMonitoring;
|
1068 |
begin
|
1069 |
MonitorHook.Enabled := True;
|
1070 |
end;
|
1071 |
|
1072 |
procedure DisableMonitoring;
|
1073 |
begin
|
1074 |
MonitorHook.Enabled := False;
|
1075 |
end;
|
1076 |
|
1077 |
function MonitoringEnabled: Boolean;
|
1078 |
begin
|
1079 |
result := MonitorHook.Enabled;
|
1080 |
end;
|
1081 |
|
1082 |
procedure CloseThreads;
|
1083 |
begin
|
1084 |
{$IFDEF DEBUG}writeln('Closed Threads Called');{$ENDIF}
|
1085 |
if Assigned(FReaderThread) then
|
1086 |
begin
|
1087 |
FReaderThread.Terminate;
|
1088 |
FReaderThread.WaitFor;
|
1089 |
FreeAndNil(FReaderThread);
|
1090 |
end;
|
1091 |
if Assigned(FWriterThread) then
|
1092 |
begin
|
1093 |
FWriterThread.Terminate;
|
1094 |
FWriterThread.WaitFor;
|
1095 |
FreeAndNil(FWriterThread);
|
1096 |
end;
|
1097 |
end;
|
1098 |
|
1099 |
initialization
|
1100 |
CS := TCriticalSection.Create;
|
1101 |
_MonitorHook := nil;
|
1102 |
FWriterThread := nil;
|
1103 |
FReaderThread := nil;
|
1104 |
bDone := False;
|
1105 |
{$IFDEF USE_SV5_IPC}
|
1106 |
if FpGetEnv('FBSQL_IPCFILENAME') <> nil then
|
1107 |
IPCFileName := strpas(FpGetEnv('FBSQL_IPCFILENAME'))
|
1108 |
else
|
1109 |
IPCFileName := GetTempDir(true) + IPCFileName + '.' + strpas(FpGetEnv('USER'));
|
1110 |
{$ENDIF}
|
1111 |
|
1112 |
finalization
|
1113 |
{$IFDEF DEBUG}writeln('Entered Finalisation');{$ENDIF}
|
1114 |
try
|
1115 |
{ Write an empty string to force the reader to unlock during termination }
|
1116 |
bDone := True;
|
1117 |
if Assigned(_MonitorHook) then
|
1118 |
_MonitorHook.ForceRelease;
|
1119 |
CloseThreads;
|
1120 |
if Assigned(_MonitorHook) then
|
1121 |
_MonitorHook._Release;
|
1122 |
|
1123 |
finally
|
1124 |
_MonitorHook := nil;
|
1125 |
if assigned(CS) then CS.Free;
|
1126 |
end;
|
1127 |
end.
|