108 lines
2.7 KiB
ObjectPascal
108 lines
2.7 KiB
ObjectPascal
{******************************************************************
|
|
|
|
JEDI-VCL Demo
|
|
|
|
Copyright (C) 2002 Project JEDI
|
|
|
|
Original author:
|
|
|
|
Contributor(s):
|
|
|
|
You may retrieve the latest version of this file at the JEDI-JVCL
|
|
home page, located at http://jvcl.sourceforge.net
|
|
|
|
The contents of this file are used with permission, subject to
|
|
the Mozilla Public License Version 1.1 (the "License"); you may
|
|
not use this file except in compliance with the License. You may
|
|
obtain a copy of the License at
|
|
http://www.mozilla.org/MPL/MPL-1_1Final.html
|
|
|
|
Software distributed under the License is distributed on an
|
|
"AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
|
|
implied. See the License for the specific language governing
|
|
rights and limitations under the License.
|
|
|
|
******************************************************************}
|
|
|
|
unit RemoteObject;
|
|
|
|
interface
|
|
uses JvUIBSrv, JvUIBObj, RemoteObject_UIB, Classes, JvUIB, JvUIBConst, IdTCPServer;
|
|
|
|
type
|
|
TRemoteObject = class(TStubRemoteObject)
|
|
private
|
|
FTransaction: TJvUIBTransaction;
|
|
public
|
|
constructor Create(Connection: TIdTCPServerConnection); override;
|
|
destructor Destroy; override;
|
|
{ IRemoteInterface }
|
|
function OpenQuery(SQL: String; Stream: TStream): HRESULT; override;
|
|
function GetEmployeeCount(out count: Integer): HRESULT; override;
|
|
end;
|
|
|
|
implementation
|
|
|
|
uses main, SysUtils;
|
|
|
|
{ TRemoteObject }
|
|
|
|
constructor TRemoteObject.Create(Connection: TIdTCPServerConnection);
|
|
begin
|
|
inherited;
|
|
FTransaction := TJvUIBTransaction.Create(nil);
|
|
FTransaction.DataBase := MainForm.DataBase;
|
|
end;
|
|
|
|
destructor TRemoteObject.Destroy;
|
|
begin
|
|
FTransaction.Free;
|
|
inherited;
|
|
end;
|
|
|
|
function TRemoteObject.GetEmployeeCount(out count: Integer): HRESULT;
|
|
var Query: TJvUIBQuery;
|
|
begin
|
|
try
|
|
Query := TJvUIBQuery.Create(FTransaction);
|
|
try
|
|
Query.SQL.Text := 'Select Count(EMP_NO) from employee';
|
|
Query.Open;
|
|
count := Query.Fields.AsInteger[0];
|
|
Result := S_OK;
|
|
finally
|
|
Query.Free;
|
|
end;
|
|
except
|
|
Result := S_FALSE;
|
|
end;
|
|
end;
|
|
|
|
function TRemoteObject.OpenQuery(SQL: String; Stream: TStream): HRESULT;
|
|
var Query: TJvUIBQuery;
|
|
begin
|
|
try
|
|
Query := TJvUIBQuery.Create(FTransaction);
|
|
try
|
|
Query.FetchBlobs := True;
|
|
Query.SQL.Text := SQL;
|
|
Query.Open;
|
|
Query.FetchAll;
|
|
Query.Fields.SaveToStream(Stream);
|
|
Result := S_OK;
|
|
finally
|
|
Query.Free;
|
|
end;
|
|
except
|
|
Result := S_FALSE;
|
|
end;
|
|
end;
|
|
|
|
initialization
|
|
TJvUIBObjectFactory.Create(JvUIBServer, TRemoteObject, CLSID_RemoteObject);
|
|
|
|
finalization
|
|
|
|
|
|
end.
|