73 lines
2.0 KiB
ObjectPascal
73 lines
2.0 KiB
ObjectPascal
unit uRODataSnapProviderManager;
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interface
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uses Contnrs, Provider,
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uRODataSnapProviderPublisher, uRODataSnap_Intf;
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type TProviderManager = class(TObjectList)
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public
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constructor Create();
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procedure RegisterPublisher(iPublisher:TROCustomDataSnapProviderPublisher);
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procedure UnregisterPublisher(iPublisher:TROCustomDataSnapProviderPublisher);
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function GetProviderNames:TProviderNames;
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function GetProviderByName(const iProviderName:string):TCustomProvider;
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end;
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var ProviderManager:TProviderManager;
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implementation
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uses SysUtils, Classes,
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uRODataSnapRes;
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{ TProviderManager }
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constructor TProviderManager.Create;
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begin
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inherited Create(false);
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end;
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function TProviderManager.GetProviderByName(const iProviderName:string): TCustomProvider;
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var i:integer;
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begin
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//ToDo: protect by CriticalSection;
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result := nil;
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for i := 0 to Count-1 do begin
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result := (Items[i] as TRODataSnapProviderPublisher).GetProviderByName(iProviderName);
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if Assigned(result) then break;
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end; { for }
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if not Assigned(result) then raise Exception.CreateFmt(sProviderNotExported,[iProviderName]);
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end;
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function TProviderManager.GetProviderNames: TProviderNames;
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var i:integer;
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begin
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//ToDo: protect by CriticalSection;
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result := TProviderNames.Create();
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for i := 0 to Count-1 do begin
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(Items[i] as TRODataSnapProviderPublisher).AddNamesToTProviderNames(result);
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end; { for }
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end;
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procedure TProviderManager.RegisterPublisher(iPublisher: TROCustomDataSnapProviderPublisher);
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begin
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//ToDo: protect by CriticalSection;
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if IndexOf(iPublisher) = -1 then Add(iPublisher);
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end;
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procedure TProviderManager.UnregisterPublisher(iPublisher: TROCustomDataSnapProviderPublisher);
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var lIndex:integer;
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begin
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lIndex := IndexOf(iPublisher);
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if IndexOf(iPublisher) <> -1 then Delete(lIndex);
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end;
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initialization
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ProviderManager := TProviderManager.Create();
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finalization
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FreeAndNil(ProviderManager);
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end.
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