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tony |
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(*
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* Firebird Interface (fbintf). The fbintf components provide a set of
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* Pascal language bindings for the Firebird API. Although predominantly
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* a new development they include source code taken from IBX and may be
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* considered a derived product. This software thus also includes the copyright
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* notice and license conditions from IBX.
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*
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* Except for those parts dervied from IBX, contents of this file are subject
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* to the Initial Developer's Public License Version 1.0 (the "License"); you
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* may not use this file except in compliance with the License. You may obtain a
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* copy of the License here:
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*
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* http://www.firebirdsql.org/index.php?op=doc&id=idpl
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing rights
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* and limitations under the License.
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*
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* The Initial Developer of the Original Code is Tony Whyman.
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*
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* The Original Code is (C) 2016 Tony Whyman, MWA Software
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* (http://www.mwasoftware.co.uk).
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*
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* All Rights Reserved.
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*
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* Contributor(s): ______________________________________.
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*
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*)
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unit FBServices;
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tony |
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{$IFDEF MSWINDOWS}
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{$DEFINE WINDOWS}
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{$ENDIF}
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{$IFDEF FPC}
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{$mode delphi}
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{$interfaces COM}
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{$ENDIF}
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interface
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uses
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Classes, SysUtils, IB, FBParamBlock, FBActivityMonitor, FBClientAPI;
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tony |
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type
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{ TFBServiceManager }
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TFBServiceManager = class(TFBInterfacedObject)
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private
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FFirebirdAPI: IFirebirdAPI;
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FProtocol: TProtocol;
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FServerName: AnsiString;
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FPort: AnsiString;
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procedure CheckServerName;
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protected
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FSPB: ISPB;
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procedure InternalAttach(ConnectString: AnsiString); virtual; abstract;
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public
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constructor Create(api: TFBClientAPI; ServerName: AnsiString; Protocol: TProtocol; SPB: ISPB; Port: AnsiString = '');
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destructor Destroy; override;
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public
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{IServiceManager}
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function getFirebirdAPI: IFirebirdAPI;
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function getSPB: ISPB;
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function getServerName: AnsiString;
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function getProtocol: TProtocol;
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function getPortNo: AnsiString;
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procedure Attach;
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procedure Detach(Force: boolean=false); virtual; abstract;
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function AllocateSRB: ISRB;
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function AllocateSQPB: ISQPB;
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function Query(SQPB: ISQPB; Request: ISRB; RaiseExceptionOnError: boolean=true): IServiceQueryResults; overload; virtual; abstract;
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function Query(Request: ISRB; RaiseExceptionOnError: boolean=true): IServiceQueryResults; overload;
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end;
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{ TSPBItem }
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TSPBItem = class(TParamBlockItem,ISPBItem)
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public
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function getParamTypeName: AnsiString; override;
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class function LookupParamTypeName(ParamType: byte): AnsiString;
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end;
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{ TSPB }
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TSPB = class (TCustomParamBlock<TSPBItem,ISPBItem>, ISPB)
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protected
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function LookupItemType(ParamTypeName: AnsiString): byte; override;
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public
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constructor Create(api: TFBClientAPI);
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function GetDPBParamTypeName(ParamType: byte): Ansistring;
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end;
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implementation
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uses FBMessages, IBUtils;
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const
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SPBPrefix = 'isc_spb_';
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isc_spb_last_spb_constant = 13;
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SPBConstantNames: array[1..isc_spb_last_spb_constant] of String = (
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'user_name',
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'sys_user_name',
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'sys_user_name_enc',
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'password',
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'password_enc',
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'command_line',
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'db_name',
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'verbose',
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'options',
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'connect_timeout',
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'dummy_packet_interval',
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'sql_role_name',
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'expected_db'
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);
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SPBConstantValues: array[1..isc_spb_last_spb_constant] of Integer = (
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isc_spb_user_name,
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isc_spb_sys_user_name,
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isc_spb_sys_user_name_enc,
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isc_spb_password,
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isc_spb_password_enc,
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isc_spb_command_line,
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isc_spb_dbname,
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isc_spb_verbose,
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isc_spb_options,
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isc_spb_connect_timeout,
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isc_spb_dummy_packet_interval,
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isc_spb_sql_role_name,
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isc_spb_expected_db
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);
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{ TSPBItem }
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function TSPBItem.getParamTypeName: AnsiString;
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begin
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Result := LookupParamTypeName(getParamType);
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end;
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class function TSPBItem.LookupParamTypeName(ParamType: byte): AnsiString;
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var i: integer;
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begin
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Result := '';
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for i := 1 to isc_spb_last_spb_constant do
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if SPBConstantValues [i] = ParamType then
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begin
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Result := SPBConstantNames[i];
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break;
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end;
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end;
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{ TFBServiceManager }
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procedure TFBServiceManager.CheckServerName;
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begin
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if (FServerName = '') and (FProtocol <> Local) then
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IBError(ibxeServerNameMissing, [nil]);
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end;
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constructor TFBServiceManager.Create(api: TFBClientAPI; ServerName: AnsiString;
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Protocol: TProtocol; SPB: ISPB; Port: AnsiString);
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begin
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inherited Create;
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FFirebirdAPI := api.getAPI; {Keep reference to interface}
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FProtocol := Protocol;
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FSPB := SPB;
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FServerName := ServerName;
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FPort := Port;
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Attach;
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end;
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destructor TFBServiceManager.Destroy;
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begin
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Detach(true);
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inherited Destroy;
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end;
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function TFBServiceManager.getFirebirdAPI: IFirebirdAPI;
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begin
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Result := FFirebirdAPI;
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end;
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function TFBServiceManager.getSPB: ISPB;
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begin
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Result := FSPB;
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end;
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function TFBServiceManager.getServerName: AnsiString;
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begin
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Result := FServerName;
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end;
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function TFBServiceManager.getProtocol: TProtocol;
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begin
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Result := FProtocol;
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end;
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function TFBServiceManager.getPortNo: AnsiString;
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begin
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Result := FPort;
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end;
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procedure TFBServiceManager.Attach;
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var ConnectString: AnsiString;
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begin
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ConnectString := MakeConnectString(FServerName,'service_mgr',FProtocol,FPort);
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InternalAttach(ConnectString);
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end;
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function TFBServiceManager.AllocateSRB: ISRB;
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begin
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Result := TSRB.Create(FFirebirdAPI as TFBClientAPI);
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end;
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function TFBServiceManager.AllocateSQPB: ISQPB;
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begin
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Result := TSQPB.Create(FFirebirdAPI as TFBClientAPI);
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end;
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function TFBServiceManager.Query(Request: ISRB; RaiseExceptionOnError: boolean
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): IServiceQueryResults;
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begin
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Result := Query(nil,Request,RaiseExceptionOnError);
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end;
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{ TSPB }
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function TSPB.LookupItemType(ParamTypeName: AnsiString): byte;
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var i: integer;
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begin
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Result := 0;
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ParamTypeName := LowerCase(ParamTypeName);
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if Pos(SPBPrefix,ParamTypeName) = 1 then
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system.Delete(ParamTypeName,1,Length(SPBPrefix));
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for i := 1 to isc_spb_last_spb_constant do
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if SPBConstantNames [i] = ParamTypeName then
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begin
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Result := SPBConstantValues[i];
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break;
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end;
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end;
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constructor TSPB.Create(api: TFBClientAPI);
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begin
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inherited Create(api);
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FDataLength := 2;
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FBuffer^ := isc_spb_version;
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(FBuffer+1)^ := isc_spb_current_version;
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end;
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function TSPB.GetDPBParamTypeName(ParamType: byte): Ansistring;
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begin
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Result := TSPBItem.LookupParamTypeName(ParamType);
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end;
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end.
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