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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 - 2018 }
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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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{$Mode Delphi}
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{$codepage UTF8}
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{ $DEFINE DEBUG}
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interface
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uses
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IB, IBUtils, IBSQL, IBCustomDataSet, IBDatabase, DB, IBInternals,
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SysUtils, Classes;
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{Note that the original inter-thread communication between the Reader Thread and
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the ISQL Monitor used the Windows PostMessage interface. This is currently not
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useable under the FPC RTL as AllocateHWnd is not functional. It has been replaced
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by the use of the Synchronize method.}
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{$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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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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FOnMonitoringDisabled: TNotifyEvent;
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FOnSQLEvent: TSQLEvent;
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FTraceFlags: TTraceFlags;
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FEnabled: Boolean;
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function GetReadCount: integer;
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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 OnMonitoringDisabled: TNotifyEvent read FOnMonitoringDisabled write FOnMonitoringDisabled;
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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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property ReadCount: integer read GetReadCount;
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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 OnMonitoringDisabled;
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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: TIBMonitoredService); overload;
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procedure ServiceDetach(service: TIBMonitoredService); overload;
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procedure ServiceQuery(service: TIBMonitoredService); overload;
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procedure ServiceStart(service: TIBMonitoredService); overload;
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procedure ServiceAttach(service: TIBXMonitoredConnection); overload;
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procedure ServiceDetach(service: TIBXMonitoredConnection); overload;
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procedure ServiceQuery(service: TIBXMonitoredService); overload;
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procedure ServiceStart(service: TIBXMonitoredService); overload;
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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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function GetWriteCount: 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 IBIPC, contnrs, syncobjs, CustApp, IBMessages;
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const
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cWriteMessageAvailable = 'WriterMsgQueue';
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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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FIPCInterface: IIPCInterface;
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FTraceFlags: TTraceFlags;
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FEnabled: Boolean;
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FWriteCount: integer;
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procedure NeedIPCInterface;
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protected
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procedure WriteSQLData(Text: String; DataType: TTraceControlFlag);
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public
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constructor Create;
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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: TIBMonitoredService); virtual; overload;
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procedure ServiceDetach(service: TIBMonitoredService); virtual; overload;
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procedure ServiceQuery(service: TIBMonitoredService); virtual; overload;
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procedure ServiceStart(service: TIBMonitoredService); virtual; overload;
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procedure ServiceAttach(service: TIBXMonitoredConnection); virtual; overload;
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procedure ServiceDetach(service: TIBXMonitoredConnection); virtual; overload;
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procedure ServiceQuery(service: TIBXMonitoredService); virtual; overload;
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procedure ServiceStart(service: TIBXMonitoredService); virtual; overload;
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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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function GetWriteCount: 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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FIPCInterface: IIPCInterface;
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FMsgs : TObjectList;
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FCriticalSection: TCriticalSection;
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FMsgAvailable: TEventObject;
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FWriteCount: integer;
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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(IPCInterface: IIPCInterface);
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destructor Destroy; override;
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procedure WriteSQLData(Msg : String; DataType : TTraceControlFlag);
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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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FIPCInterface: IIPCInterface;
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FCriticalSection: TCriticalSection;
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FReadCount: integer;
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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(IPCInterface: IIPCInterface);
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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 ((st.FDataType = tfDisabled) or
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(st.FDataType in FTraceFlags)) then
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FOnSQLEvent(st.FMsg, st.FTimeStamp);
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if assigned(OnMonitoringDisabled) and (st.FDataType = tfDisabled) then
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OnMonitoringDisabled(self);
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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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function TIBCustomSQLMonitor.GetReadCount: integer;
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begin
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Result := FReaderThread.FReadCount;
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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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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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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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function TIBSQLMonitorHook.GetEnabled: Boolean;
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begin
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Result := FEnabled;
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end;
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function TIBSQLMonitorHook.GetMonitorCount: Integer;
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begin
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Result := FIPCInterface.MonitorCount
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end;
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function TIBSQLMonitorHook.GetWriteCount: integer;
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begin
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if assigned(FWriterThread) then
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Result := FWriterThread.FWriteCount
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else
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Result := FWriteCount;
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end;
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function TIBSQLMonitorHook.GetTraceFlags: TTraceFlags;
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begin
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Result := FTraceFlags;
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end;
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procedure TIBSQLMonitorHook.RegisterMonitor(SQLMonitor: TIBCustomSQLMonitor);
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begin
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{$IFDEF DEBUG}writeln('Register Monitor');{$ENDIF}
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NeedIPCInterface;
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if not Assigned(FReaderThread) then
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FReaderThread := TReaderThread.Create(FIPCInterface);
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FReaderThread.AddMonitor(SQLMonitor);
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end;
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401 |
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procedure TIBSQLMonitorHook.ReleaseMonitor(Arg: TIBCustomSQLMonitor);
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begin
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if FWriterThread <> nil then
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FWriterThread.ReleaseMonitor(Arg);
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end;
|
407 |
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procedure TIBSQLMonitorHook.SendMisc(Msg: String);
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begin
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410 |
if FEnabled then
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begin
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WriteSQLData(Msg, tfMisc);
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end;
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end;
|
415 |
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procedure TIBSQLMonitorHook.ServiceAttach(service: TIBMonitoredService);
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417 |
var
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st: String;
|
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begin
|
420 |
if FEnabled then
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421 |
begin
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422 |
if not (tfService in (FTraceFlags * service.TraceFlags)) then
|
423 |
Exit;
|
424 |
st := service.Name + ': [Attach]'; {do not localize}
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WriteSQLData(st, tfService);
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426 |
end;
|
427 |
end;
|
428 |
|
429 |
procedure TIBSQLMonitorHook.ServiceDetach(service: TIBMonitoredService);
|
430 |
var
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431 |
st: String;
|
432 |
begin
|
433 |
if FEnabled then
|
434 |
begin
|
435 |
if not (tfService in (FTraceFlags * service.TraceFlags)) then
|
436 |
Exit;
|
437 |
st := service.Name + ': [Detach]'; {do not localize}
|
438 |
WriteSQLData(st, tfService);
|
439 |
end;
|
440 |
end;
|
441 |
|
442 |
procedure TIBSQLMonitorHook.ServiceQuery(service: TIBMonitoredService);
|
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 + ': [Query]'; {do not localize}
|
451 |
WriteSQLData(st, tfService);
|
452 |
end;
|
453 |
end;
|
454 |
|
455 |
procedure TIBSQLMonitorHook.ServiceStart(service: TIBMonitoredService);
|
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 + ': [Start]'; {do not localize}
|
464 |
WriteSQLData(st, tfService);
|
465 |
end;
|
466 |
end;
|
467 |
|
468 |
procedure TIBSQLMonitorHook.ServiceAttach(service: TIBXMonitoredConnection);
|
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 + ': [Attach]'; {do not localize}
|
477 |
WriteSQLData(st, tfService);
|
478 |
end;
|
479 |
end;
|
480 |
|
481 |
procedure TIBSQLMonitorHook.ServiceDetach(service: TIBXMonitoredConnection);
|
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 + ': [Detach]'; {do not localize}
|
490 |
WriteSQLData(st, tfService);
|
491 |
end;
|
492 |
end;
|
493 |
|
494 |
procedure TIBSQLMonitorHook.ServiceQuery(service: TIBXMonitoredService);
|
495 |
var
|
496 |
st: String;
|
497 |
begin
|
498 |
if FEnabled then
|
499 |
begin
|
500 |
if not (tfService in (FTraceFlags * service.TraceFlags)) then
|
501 |
Exit;
|
502 |
st := service.Name + ': [Query]'; {do not localize}
|
503 |
WriteSQLData(st, tfService);
|
504 |
end;
|
505 |
end;
|
506 |
|
507 |
procedure TIBSQLMonitorHook.ServiceStart(service: TIBXMonitoredService);
|
508 |
var
|
509 |
st: String;
|
510 |
begin
|
511 |
if FEnabled then
|
512 |
begin
|
513 |
if not (tfService in (FTraceFlags * service.TraceFlags)) then
|
514 |
Exit;
|
515 |
st := service.Name + ': [Start]'; {do not localize}
|
516 |
WriteSQLData(st, tfService);
|
517 |
end;
|
518 |
end;
|
519 |
|
520 |
procedure TIBSQLMonitorHook.SetEnabled(const Value: Boolean);
|
521 |
begin
|
522 |
if FEnabled = Value then Exit;
|
523 |
|
524 |
FEnabled := Value;
|
525 |
if FEnabled then
|
526 |
begin
|
527 |
NeedIPCInterface;
|
528 |
if not Assigned(FWriterThread) then
|
529 |
FWriterThread := TWriterThread.Create(FIPCInterface);
|
530 |
(* {$ifdef UNIX}
|
531 |
if not IsMultiThread then
|
532 |
IBError(ibxeMultiThreadRequired,['IBSQLMonitor']);
|
533 |
{$endif}*)
|
534 |
end;
|
535 |
if (not FEnabled) and (Assigned(FWriterThread)) then
|
536 |
begin
|
537 |
WriteSQLData('Monitoring Disabled',tfDisabled);
|
538 |
FWriterThread.Terminate;
|
539 |
FWriterThread.WaitFor;
|
540 |
FWriteCount := FWriterThread.FWriteCount;
|
541 |
FreeAndNil(FWriterThread);
|
542 |
end;
|
543 |
end;
|
544 |
|
545 |
procedure TIBSQLMonitorHook.SetTraceFlags(const Value: TTraceFlags);
|
546 |
begin
|
547 |
FTraceFlags := Value
|
548 |
end;
|
549 |
|
550 |
procedure TIBSQLMonitorHook.ForceRelease;
|
551 |
begin
|
552 |
if Assigned(FReaderThread) then
|
553 |
begin
|
554 |
FReaderThread.Terminate;
|
555 |
if not Assigned(FWriterThread) then
|
556 |
FWriterThread := TWriterThread.Create(FIPCInterface);
|
557 |
FWriterThread.WriteSQLData(' ', tfMisc);
|
558 |
end;
|
559 |
end;
|
560 |
|
561 |
procedure TIBSQLMonitorHook.SQLExecute(qry: TIBSQL);
|
562 |
var
|
563 |
st: String;
|
564 |
i: Integer;
|
565 |
begin
|
566 |
if FEnabled then
|
567 |
begin
|
568 |
if not ((tfQExecute in (FTraceFlags * qry.Database.TraceFlags)) or
|
569 |
(tfStmt in (FTraceFlags * qry.Database.TraceFlags)) ) then
|
570 |
Exit;
|
571 |
if qry.Owner is TIBCustomDataSet then
|
572 |
st := TIBCustomDataSet(qry.Owner).Name
|
573 |
else
|
574 |
st := qry.Name;
|
575 |
st := st + ': [Execute] ' + qry.SQL.Text; {do not localize}
|
576 |
if qry.Params.GetCount > 0 then begin
|
577 |
for i := 0 to qry.Params.GetCount - 1 do begin
|
578 |
st := st + LineEnding + ' ' + qry.Params[i].Name + ' = ';
|
579 |
try
|
580 |
if qry.Params[i].IsNull then
|
581 |
st := st + '<NULL>'; {do not localize}
|
582 |
st := st + qry.Params[i].AsString;
|
583 |
except
|
584 |
st := st + '<' + SCantPrintValue + '>';
|
585 |
end;
|
586 |
end;
|
587 |
end;
|
588 |
WriteSQLData(st, tfQExecute);
|
589 |
end;
|
590 |
end;
|
591 |
|
592 |
procedure TIBSQLMonitorHook.SQLFetch(qry: TIBSQL);
|
593 |
var
|
594 |
st: String;
|
595 |
begin
|
596 |
if FEnabled then
|
597 |
begin
|
598 |
if not ((tfQFetch in (FTraceFlags * qry.Database.TraceFlags)) or
|
599 |
(tfStmt in (FTraceFlags * qry.Database.TraceFlags))) then
|
600 |
Exit;
|
601 |
if qry.Owner is TIBCustomDataSet then
|
602 |
st := TIBCustomDataSet(qry.Owner).Name
|
603 |
else
|
604 |
st := qry.Name;
|
605 |
st := st + ': [Fetch] ' + qry.SQL.Text; {do not localize}
|
606 |
if (qry.EOF) then
|
607 |
st := st + LineEnding + ' ' + SEOFReached;
|
608 |
WriteSQLData(st, tfQFetch);
|
609 |
end;
|
610 |
end;
|
611 |
|
612 |
procedure TIBSQLMonitorHook.SQLPrepare(qry: TIBSQL);
|
613 |
var
|
614 |
st: String;
|
615 |
begin
|
616 |
if FEnabled then
|
617 |
begin
|
618 |
if not ((tfQPrepare in (FTraceFlags * qry.Database.TraceFlags)) or
|
619 |
(tfStmt in (FTraceFlags * qry.Database.TraceFlags))) then
|
620 |
Exit;
|
621 |
if qry.Owner is TIBCustomDataSet then
|
622 |
st := TIBCustomDataSet(qry.Owner).Name
|
623 |
else
|
624 |
st := qry.Name;
|
625 |
st := st + ': [Prepare] ' + qry.SQL.Text + LineEnding; {do not localize}
|
626 |
st := st + ' Plan: ' + qry.Plan; {do not localize}
|
627 |
WriteSQLData(st, tfQPrepare);
|
628 |
end;
|
629 |
end;
|
630 |
|
631 |
procedure TIBSQLMonitorHook.TRCommit(tr: TIBTransaction);
|
632 |
var
|
633 |
st: String;
|
634 |
begin
|
635 |
if FEnabled then
|
636 |
begin
|
637 |
if Assigned(tr.DefaultDatabase) and
|
638 |
(not (tfTransact in (FTraceFlags * tr.DefaultDatabase.TraceFlags))) then
|
639 |
Exit;
|
640 |
st := tr.Name + ': [Commit (Hard commit)]'; {do not localize}
|
641 |
WriteSQLData(st, tfTransact);
|
642 |
end;
|
643 |
end;
|
644 |
|
645 |
procedure TIBSQLMonitorHook.TRCommitRetaining(tr: TIBTransaction);
|
646 |
var
|
647 |
st: String;
|
648 |
begin
|
649 |
if FEnabled then
|
650 |
begin
|
651 |
if Assigned(tr.DefaultDatabase) and
|
652 |
(not (tfTransact in (FTraceFlags * tr.DefaultDatabase.TraceFlags))) then
|
653 |
Exit;
|
654 |
st := tr.Name + ': [Commit retaining (Soft commit)]'; {do not localize}
|
655 |
WriteSQLData(st, tfTransact);
|
656 |
end;
|
657 |
end;
|
658 |
|
659 |
procedure TIBSQLMonitorHook.TRRollback(tr: TIBTransaction);
|
660 |
var
|
661 |
st: String;
|
662 |
begin
|
663 |
if FEnabled then
|
664 |
begin
|
665 |
if Assigned(tr.DefaultDatabase) and
|
666 |
(not (tfTransact in (FTraceFlags * tr.DefaultDatabase.TraceFlags))) then
|
667 |
Exit;
|
668 |
st := tr.Name + ': [Rollback]'; {do not localize}
|
669 |
WriteSQLData(st, tfTransact);
|
670 |
end;
|
671 |
end;
|
672 |
|
673 |
procedure TIBSQLMonitorHook.TRRollbackRetaining(tr: TIBTransaction);
|
674 |
var
|
675 |
st: String;
|
676 |
begin
|
677 |
if FEnabled then
|
678 |
begin
|
679 |
if Assigned(tr.DefaultDatabase) and
|
680 |
(not (tfTransact in (FTraceFlags * tr.DefaultDatabase.TraceFlags))) then
|
681 |
Exit;
|
682 |
st := tr.Name + ': [Rollback retaining (Soft rollback)]'; {do not localize}
|
683 |
WriteSQLData(st, tfTransact);
|
684 |
end;
|
685 |
end;
|
686 |
|
687 |
procedure TIBSQLMonitorHook.TRStart(tr: TIBTransaction);
|
688 |
var
|
689 |
st: String;
|
690 |
begin
|
691 |
if FEnabled then
|
692 |
begin
|
693 |
if Assigned(tr.DefaultDatabase) and
|
694 |
(not (tfTransact in (FTraceFlags * tr.DefaultDatabase.TraceFlags))) then
|
695 |
Exit;
|
696 |
st := tr.Name + ': [Start transaction]'; {do not localize}
|
697 |
WriteSQLData(st, tfTransact);
|
698 |
end;
|
699 |
end;
|
700 |
|
701 |
procedure TIBSQLMonitorHook.UnregisterMonitor(SQLMonitor: TIBCustomSQLMonitor);
|
702 |
var
|
703 |
Created : Boolean;
|
704 |
begin
|
705 |
{$IFDEF DEBUG}writeln('Unregister Monitor');{$ENDIF}
|
706 |
if assigned(FReaderThread) then
|
707 |
begin
|
708 |
FReaderThread.RemoveMonitor(SQLMonitor);
|
709 |
if FReaderThread.FMonitors.Count = 0 then
|
710 |
begin
|
711 |
FReaderThread.Terminate;
|
712 |
|
713 |
{ There is a possibility of a reader thread, but no writer one.
|
714 |
When in that situation, the reader needs to be released after
|
715 |
the terminate is set. To do that, create a Writer thread, send
|
716 |
the release code (a string of ' ' and type tfMisc) and then free
|
717 |
it up. }
|
718 |
|
719 |
Created := false;
|
720 |
if not Assigned(FWriterThread) then
|
721 |
begin
|
722 |
FWriterThread := TWriterThread.Create(FIPCInterface);
|
723 |
Created := true;
|
724 |
end;
|
725 |
FWriterThread.WriteSQLData(' ', tfMisc);
|
726 |
{$IFDEF DEBUG}writeln('Wait for read Terminate');{$ENDIF}
|
727 |
FReaderThread.WaitFor;
|
728 |
if assigned(FReaderThread.FatalException) then
|
729 |
IBError(ibxeThreadFailed,['Reader',Exception(FReaderThread.FatalException).Message]);
|
730 |
{$IFDEF DEBUG}writeln('Freeing Reader Thread');{$ENDIF}
|
731 |
FreeAndNil(FReaderThread);
|
732 |
{$IFDEF DEBUG}writeln('Reader Thread Freed');{$ENDIF}
|
733 |
if Created then
|
734 |
begin
|
735 |
FWriterThread.Terminate;
|
736 |
{$IFDEF DEBUG}writeln('Wait for write Terminate');{$ENDIF}
|
737 |
FWriterThread.WaitFor;
|
738 |
if assigned(FWriterThread.FatalException) then
|
739 |
IBError(ibxeThreadFailed,['Writer',Exception(FWriterThread.FatalException).Message]);
|
740 |
FreeAndNil(FWriterThread);
|
741 |
end;
|
742 |
end;
|
743 |
end;
|
744 |
{$IFDEF DEBUG}writeln('Unregister done'){$ENDIF}
|
745 |
end;
|
746 |
|
747 |
procedure TIBSQLMonitorHook.NeedIPCInterface;
|
748 |
begin
|
749 |
if FIPCInterface = nil then
|
750 |
FIPCInterface := CreateIPCInterface;
|
751 |
end;
|
752 |
|
753 |
procedure TIBSQLMonitorHook.WriteSQLData(Text: String;
|
754 |
DataType: TTraceControlFlag);
|
755 |
begin
|
756 |
// {$IFDEF DEBUG}writeln('Write SQL Data: '+Text);{$ENDIF}
|
757 |
Text := LineEnding + '[Application: ' + ApplicationTitle + ']' + LineEnding + Text; {do not localize}
|
758 |
FWriterThread.WriteSQLData(Text, DataType);
|
759 |
end;
|
760 |
|
761 |
{ TWriterThread }
|
762 |
|
763 |
constructor TWriterThread.Create(IPCInterface: IIPCInterface);
|
764 |
|
765 |
begin
|
766 |
inherited Create(true);
|
767 |
{$IFDEF DEBUG}writeln('Write Object Created');{$ENDIF}
|
768 |
FIPCInterface := IPCInterface;
|
769 |
FMsgs := TObjectList.Create(true);
|
770 |
FCriticalSection := TCriticalSection.Create;
|
771 |
FMsgAvailable := TEventObject.Create(FIPCInterface.Sa,true,false,cWriteMessageAvailable);
|
772 |
Start;
|
773 |
end;
|
774 |
|
775 |
destructor TWriterThread.Destroy;
|
776 |
begin
|
777 |
if assigned(FMsgs) then FMsgs.Free;
|
778 |
if assigned(FCriticalSection) then FCriticalSection.Free;
|
779 |
if assigned(FMsgAvailable) then FMsgAvailable.Free;
|
780 |
inherited Destroy;
|
781 |
end;
|
782 |
|
783 |
procedure TWriterThread.Execute;
|
784 |
begin
|
785 |
{$IFDEF DEBUG}writeln('Write Thread starts');{$ENDIF}
|
786 |
try
|
787 |
{ Place thread code here }
|
788 |
while ((not Terminated) and (not bDone)) or
|
789 |
(FMsgs.Count <> 0) do
|
790 |
begin
|
791 |
FMsgAvailable.WaitFor(cMsgWaitTime);
|
792 |
{ Any one listening? }
|
793 |
if FIPCInterface.MonitorCount = 0 then
|
794 |
begin
|
795 |
if FMsgs.Count <> 0 then
|
796 |
begin
|
797 |
{$IFDEF DEBUG}writeln('Write Thread Drop Message');{$ENDIF}
|
798 |
RemoveFromList;
|
799 |
end;
|
800 |
end
|
801 |
else
|
802 |
{ Anything to process? }
|
803 |
if FMsgs.Count <> 0 then
|
804 |
begin
|
805 |
{ If the current queued message is a release release the object }
|
806 |
if FMsgs.Items[0] is TReleaseObject then
|
807 |
begin
|
808 |
{$IFDEF DEBUG}writeln('Post Release');{$ENDIF}
|
809 |
if not Terminated then
|
810 |
Synchronize(PostRelease);
|
811 |
end
|
812 |
else
|
813 |
{ Otherwise write the TraceObject to the buffer }
|
814 |
begin
|
815 |
WriteToBuffer;
|
816 |
end;
|
817 |
end
|
818 |
else
|
819 |
begin
|
820 |
FCriticalSection.Enter;
|
821 |
try
|
822 |
if FMsgs.Count = 0 then
|
823 |
FMsgAvailable.ResetEvent
|
824 |
finally
|
825 |
FCriticalSection.Leave
|
826 |
end;
|
827 |
end;
|
828 |
end;
|
829 |
except on E: Exception do
|
830 |
begin
|
831 |
{$IFDEF DEBUG}writeln('Write Thread raised Exception: ' + E.Message);{$ENDIF}
|
832 |
raise
|
833 |
end
|
834 |
end;
|
835 |
{$IFDEF DEBUG}writeln('Write Thread Ends');{$ENDIF}
|
836 |
end;
|
837 |
|
838 |
procedure TWriterThread.WriteSQLData(Msg: String; DataType: TTraceControlFlag);
|
839 |
begin
|
840 |
FCriticalSection.Enter;
|
841 |
try
|
842 |
FMsgs.Add(TTraceObject.Create(Msg, DataType,FWriteCount));
|
843 |
Inc(FWriteCount);
|
844 |
finally
|
845 |
FCriticalSection.Leave;
|
846 |
end;
|
847 |
FMsgAvailable.SetEvent
|
848 |
end;
|
849 |
|
850 |
procedure TWriterThread.BeginWrite;
|
851 |
begin
|
852 |
{$IFDEF DEBUG}writeln('Begin Write');{$ENDIF}
|
853 |
with FIPCInterface do
|
854 |
begin
|
855 |
ReadReadyEvent.PassThroughGate; {Wait for readers to become ready }
|
856 |
WriterBusyEvent.Lock; {Set Busy State}
|
857 |
end;
|
858 |
{$IFDEF DEBUG}writeln('Begin Write Complete');{$ENDIF}
|
859 |
end;
|
860 |
|
861 |
procedure TWriterThread.EndWrite;
|
862 |
begin
|
863 |
{$IFDEF DEBUG}writeln('End Write');{$ENDIF}
|
864 |
with FIPCInterface do
|
865 |
begin
|
866 |
DataAvailableEvent.Unlock; { Signal Data Available. }
|
867 |
ReadFinishedEvent.PassThroughGate; {Wait for readers to finish }
|
868 |
DataAvailableEvent.Lock; {reset Data Available }
|
869 |
WriterBusyEvent.Unlock; {Signal not Busy }
|
870 |
end;
|
871 |
{$IFDEF DEBUG}writeln('End Write Complete');{$ENDIF}
|
872 |
end;
|
873 |
|
874 |
procedure TWriterThread.WriteToBuffer;
|
875 |
begin
|
876 |
FIPCInterface.WriteLock.Lock;
|
877 |
try
|
878 |
{ If there are no monitors throw out the message
|
879 |
The alternative is to have messages queue up until a
|
880 |
monitor is ready.}
|
881 |
|
882 |
if FIPCInterface.MonitorCount = 0 then
|
883 |
RemoveFromList
|
884 |
else
|
885 |
begin
|
886 |
BeginWrite;
|
887 |
try
|
888 |
{$IFDEF DEBUG}writeln('Write to Buffer. Msg No. ',TTraceObject(FMsgs[0]).FMsgNumber);{$ENDIF}
|
889 |
FIPCInterface.SendTrace(TTraceObject(FMsgs[0]))
|
890 |
finally
|
891 |
RemoveFromList;
|
892 |
EndWrite
|
893 |
end
|
894 |
end;
|
895 |
finally
|
896 |
FIPCInterface.WriteLock.Unlock;
|
897 |
end;
|
898 |
{$IFDEF DEBUG}writeln('Done Write');{$ENDIF}
|
899 |
end;
|
900 |
|
901 |
procedure TWriterThread.RemoveFromList;
|
902 |
begin
|
903 |
{$IFDEF DEBUG}writeln('Write Thread: Remove object From List');{$ENDIF}
|
904 |
FCriticalSection.Enter;
|
905 |
try
|
906 |
FMsgs.Remove(FMsgs[0]); { Pop the written item }
|
907 |
finally
|
908 |
FCriticalSection.Leave;
|
909 |
end;
|
910 |
end;
|
911 |
|
912 |
procedure TWriterThread.PostRelease;
|
913 |
var Monitor: TIBCustomSQLMonitor;
|
914 |
begin
|
915 |
Monitor := TReleaseObject(FMsgs.Items[0]).FMonitor as TIBCustomSQLMonitor;
|
916 |
Monitor.ReleaseObject
|
917 |
end;
|
918 |
|
919 |
procedure TWriterThread.ReleaseMonitor(Arg : TIBCustomSQLMonitor);
|
920 |
begin
|
921 |
FMsgs.Add(TReleaseObject.Create(Arg));
|
922 |
end;
|
923 |
|
924 |
{ ReaderThread }
|
925 |
|
926 |
procedure TReaderThread.AddMonitor(Arg: TIBCustomSQLMonitor);
|
927 |
begin
|
928 |
FCriticalSection.Enter;
|
929 |
try
|
930 |
if FMonitors.IndexOf(Arg) < 0 then
|
931 |
FMonitors.Add(Arg);
|
932 |
finally
|
933 |
FCriticalSection.Leave
|
934 |
end;
|
935 |
end;
|
936 |
|
937 |
procedure TReaderThread.AlertMonitors;
|
938 |
var i : Integer;
|
939 |
FTemp : TTraceObject;
|
940 |
Monitor: TIBCustomSQLMonitor;
|
941 |
begin
|
942 |
for i := 0 to FMonitors.Count - 1 do
|
943 |
begin
|
944 |
{$IFDEF DEBUG}writeln('Sending Message to Monitor ' +IntToStr(i));{$ENDIF}
|
945 |
FTemp := TTraceObject.Create(st);
|
946 |
Monitor := TIBCustomSQLMonitor(FMonitors[i]);
|
947 |
Monitor.ReceiveMessage(FTemp);
|
948 |
end;
|
949 |
end;
|
950 |
|
951 |
procedure TReaderThread.BeginRead;
|
952 |
begin
|
953 |
{$IFDEF DEBUG}writeln('Begin Read');{$ENDIF}
|
954 |
with FIPCInterface do
|
955 |
begin
|
956 |
WriterBusyEvent.PassthroughGate; { Wait for Writer not busy}
|
957 |
ReadFinishedEvent.Lock; { Prepare Read Finished Gate}
|
958 |
ReadReadyEvent.Unlock; { Signal read ready }
|
959 |
{$IFDEF DEBUG}writeln('Read Ready Unlocked');{$ENDIF}
|
960 |
DataAvailableEvent.PassthroughGate; { Wait for a Data Available }
|
961 |
end;
|
962 |
{$IFDEF DEBUG}writeln('Begin Read Complete');{$ENDIF}
|
963 |
end;
|
964 |
|
965 |
constructor TReaderThread.Create(IPCInterface: IIPCInterface);
|
966 |
begin
|
967 |
inherited Create(true);
|
968 |
FIPCInterface := IPCInterface;
|
969 |
st := TTraceObject.Create('', tfMisc);
|
970 |
FIPCInterface.IncMonitorCount;
|
971 |
FMonitors := TObjectList.Create(false);
|
972 |
FCriticalSection := TCriticalSection.Create;
|
973 |
{$IFDEF DEBUG}writeln('Reader Thread Created');{$ENDIF}
|
974 |
FIPCInterface.ReadReadyEvent.Lock; { Initialise Read Ready}
|
975 |
Start;
|
976 |
end;
|
977 |
|
978 |
destructor TReaderThread.Destroy;
|
979 |
begin
|
980 |
{$IFDEF DEBUG}writeln('Reader Thread Destory');{$ENDIF}
|
981 |
FIPCInterface.ReadReadyEvent.UnLock;
|
982 |
if assigned(FIPCInterface) and (FIPCInterface.MonitorCount > 0) then
|
983 |
FIPCInterface.DecMonitorCount;
|
984 |
FMonitors.Free;
|
985 |
if assigned(FCriticalSection) then FCriticalSection.Free;
|
986 |
st.Free;
|
987 |
inherited Destroy;
|
988 |
end;
|
989 |
|
990 |
procedure TReaderThread.EndRead;
|
991 |
begin
|
992 |
{$IFDEF DEBUG}writeln('End Read');{$ENDIF}
|
993 |
FIPCInterface.ReadReadyEvent.Lock; { reset Read Ready}
|
994 |
FIPCInterface.ReadFinishedEvent.Unlock; {Signal Read completed }
|
995 |
{$IFDEF DEBUG}writeln('End Read Complete');{$ENDIF}
|
996 |
end;
|
997 |
|
998 |
procedure TReaderThread.Execute;
|
999 |
begin
|
1000 |
{$IFDEF DEBUG}writeln('Read Thread Starts');{$ENDIF}
|
1001 |
{ Place thread code here }
|
1002 |
while (not Terminated) and (not bDone) do
|
1003 |
begin
|
1004 |
ReadSQLData;
|
1005 |
if (st.FMsg <> '') and
|
1006 |
not ((st.FMsg = ' ') and (st.FDataType = tfMisc)) then
|
1007 |
begin
|
1008 |
{$IFDEF DEBUG}writeln('Sending Message to Monitors');{$ENDIF}
|
1009 |
if not Terminated then
|
1010 |
Synchronize(AlertMonitors);
|
1011 |
end;
|
1012 |
end;
|
1013 |
{$IFDEF DEBUG}writeln('Read Thread Ends');{$ENDIF}
|
1014 |
end;
|
1015 |
|
1016 |
procedure TReaderThread.ReadSQLData;
|
1017 |
begin
|
1018 |
st.FMsg := '';
|
1019 |
BeginRead;
|
1020 |
if not bDone then
|
1021 |
try
|
1022 |
FIPCInterface.ReceiveTrace(st);
|
1023 |
{$IFDEF DEBUG}writeln('Msg No. ',st.FMsgNumber,' received');{$ENDIF}
|
1024 |
{ if st.FMsgNumber < FReadCount then
|
1025 |
FReadCount := 0
|
1026 |
else
|
1027 |
if st.FMsgNumber <> FReadCount then
|
1028 |
IBError(ibxeMissedRead,[st.FMsgNumber,FReadCount]);}
|
1029 |
Inc(FReadCount);
|
1030 |
finally
|
1031 |
EndRead;
|
1032 |
end;
|
1033 |
end;
|
1034 |
|
1035 |
procedure TReaderThread.RemoveMonitor(Arg: TIBCustomSQLMonitor);
|
1036 |
begin
|
1037 |
FCriticalSection.Enter;
|
1038 |
try
|
1039 |
FMonitors.Remove(Arg);
|
1040 |
finally
|
1041 |
FCriticalSection.Leave
|
1042 |
end;
|
1043 |
end;
|
1044 |
|
1045 |
{ Misc methods }
|
1046 |
|
1047 |
function MonitorHook: IIBSQLMonitorHook;
|
1048 |
begin
|
1049 |
if (_MonitorHook = nil) and (not bDone) then
|
1050 |
begin
|
1051 |
CS.Enter;
|
1052 |
if (_MonitorHook = nil) and (not bDone) then
|
1053 |
begin
|
1054 |
_MonitorHook := TIBSQLMonitorHook.Create;
|
1055 |
_MonitorHook._AddRef;
|
1056 |
end;
|
1057 |
CS.Leave;
|
1058 |
end;
|
1059 |
result := _MonitorHook;
|
1060 |
end;
|
1061 |
|
1062 |
procedure EnableMonitoring;
|
1063 |
begin
|
1064 |
if assigned(FWriterThread) then
|
1065 |
FWriterThread.FWriteCount := 0;
|
1066 |
MonitorHook.Enabled := True;
|
1067 |
end;
|
1068 |
|
1069 |
procedure DisableMonitoring;
|
1070 |
begin
|
1071 |
MonitorHook.Enabled := False;
|
1072 |
end;
|
1073 |
|
1074 |
function MonitoringEnabled: Boolean;
|
1075 |
begin
|
1076 |
result := MonitorHook.Enabled;
|
1077 |
end;
|
1078 |
|
1079 |
procedure CloseThreads;
|
1080 |
begin
|
1081 |
{$IFDEF DEBUG}writeln('Closed Threads Called');{$ENDIF}
|
1082 |
if Assigned(FReaderThread) then
|
1083 |
begin
|
1084 |
FReaderThread.Terminate;
|
1085 |
FReaderThread.WaitFor;
|
1086 |
FreeAndNil(FReaderThread);
|
1087 |
end;
|
1088 |
if Assigned(FWriterThread) then
|
1089 |
begin
|
1090 |
FWriterThread.Terminate;
|
1091 |
FWriterThread.WaitFor;
|
1092 |
FreeAndNil(FWriterThread);
|
1093 |
end;
|
1094 |
end;
|
1095 |
|
1096 |
initialization
|
1097 |
CS := TCriticalSection.Create;
|
1098 |
_MonitorHook := nil;
|
1099 |
FWriterThread := nil;
|
1100 |
FReaderThread := nil;
|
1101 |
bDone := False;
|
1102 |
|
1103 |
finalization
|
1104 |
{$IFDEF DEBUG}writeln('Entered Finalisation');{$ENDIF}
|
1105 |
try
|
1106 |
{ Write an empty string to force the reader to unlock during termination }
|
1107 |
bDone := True;
|
1108 |
if Assigned(_MonitorHook) then
|
1109 |
_MonitorHook.ForceRelease;
|
1110 |
CloseThreads;
|
1111 |
if Assigned(_MonitorHook) then
|
1112 |
_MonitorHook._Release;
|
1113 |
|
1114 |
finally
|
1115 |
_MonitorHook := nil;
|
1116 |
if assigned(CS) then CS.Free;
|
1117 |
end;
|
1118 |
end.
|