mirror of
https://github.com/danieleteti/delphimvcframework.git
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ccc8ee90ab
More unit tests Refactoring for XE6 Updated copyright to 2017
189 lines
5.1 KiB
ObjectPascal
189 lines
5.1 KiB
ObjectPascal
// ***************************************************************************
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//
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// Delphi MVC Framework
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//
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// Copyright (c) 2010-2017 Daniele Teti and the DMVCFramework Team
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//
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// https://github.com/danieleteti/delphimvcframework
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//
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// ***************************************************************************
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// *************************************************************************** }
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unit MVCFramework.ApplicationSession;
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interface
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uses System.SysUtils, System.Generics.Collections;
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type
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TWebApplicationSession = class abstract
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strict protected
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function GetItems(const Key: string): string; virtual; abstract;
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procedure SetItems(const Key, Value: string); virtual; abstract;
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public
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constructor Create; virtual;
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destructor Destroy; override;
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function ToString: string; override;
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property Items[const Key: string]: string read GetItems
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write SetItems; default;
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end;
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TWebApplicationSessionClass = class of TWebApplicationSession;
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TWebApplicationSessionMemory = class(TWebApplicationSession)
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strict protected
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FData: TDictionary<string, string>;
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function GetItems(const Key: String): String; override;
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procedure SetItems(const Key, Value: String); override;
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public
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function ToString: String; override;
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constructor Create; override;
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destructor Destroy; override;
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end;
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TMVCApplicationSessionFactory = class sealed
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protected
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FRegisteredApplicationSessionTypes: TDictionary<String, TWebApplicationSessionClass>;
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class var FInstance: TMVCApplicationSessionFactory;
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constructor Create;
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public
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procedure RegisterSessionType(const AName: String;
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AWebApplicationSessionClass: TWebApplicationSessionClass);
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class function GetInstance: TMVCApplicationSessionFactory;
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function CreateNewByType(const AName: String): TWebApplicationSession;
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destructor Destroy; override;
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end;
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implementation
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uses
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System.dateutils;
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constructor TWebApplicationSession.Create;
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begin
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inherited Create;
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end;
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destructor TWebApplicationSession.Destroy;
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begin
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inherited;
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end;
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function TWebApplicationSession.ToString: string;
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begin
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Result := '';
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end;
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constructor TWebApplicationSessionMemory.Create;
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begin
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inherited;
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FData := TDictionary<string, string>.Create;
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end;
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destructor TWebApplicationSessionMemory.Destroy;
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begin
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FData.Free;
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inherited;
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end;
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function TWebApplicationSessionMemory.GetItems(const Key: String): String;
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begin
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TMonitor.Enter(self);
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try
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if not FData.TryGetValue(Key, Result) then
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Result := '';
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finally
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TMonitor.Exit(self);
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end;
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end;
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procedure TWebApplicationSessionMemory.SetItems(const Key, Value: String);
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begin
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TMonitor.Enter(self);
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try
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FData.AddOrSetValue(Key, Value);
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finally
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TMonitor.Exit(self);
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end;
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end;
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function TWebApplicationSessionMemory.ToString: String;
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var
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Key: String;
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begin
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TMonitor.Enter(self);
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try
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Result := '';
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for Key in FData.Keys do
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begin
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Result := Key + ' = ' + QuotedStr(FData.Items[Key]) + sLineBreak;
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end;
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finally
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TMonitor.Exit(self);
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end;
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end;
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{ TMVCSessionManager }
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constructor TMVCApplicationSessionFactory.Create;
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begin
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inherited;
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FRegisteredApplicationSessionTypes := TDictionary<string, TWebApplicationSessionClass>.Create;
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end;
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function TMVCApplicationSessionFactory.CreateNewByType(const AName: String): TWebApplicationSession;
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var
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clazz: TWebApplicationSessionClass;
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begin
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if not FRegisteredApplicationSessionTypes.TryGetValue(AName, clazz) then
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raise Exception.Create('Unknown application session type');
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Result := clazz.Create;
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end;
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destructor TMVCApplicationSessionFactory.Destroy;
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begin
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FRegisteredApplicationSessionTypes.Free;
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inherited;
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end;
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class
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function TMVCApplicationSessionFactory.GetInstance: TMVCApplicationSessionFactory;
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begin
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if not Assigned(FInstance) then
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// doesnt require double-check because used for the first time at the unit initialization
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FInstance := TMVCApplicationSessionFactory.Create;
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Result := FInstance;
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end;
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procedure TMVCApplicationSessionFactory.RegisterSessionType(const AName: String;
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AWebApplicationSessionClass: TWebApplicationSessionClass);
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begin
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FRegisteredApplicationSessionTypes.AddOrSetValue(AName, AWebApplicationSessionClass);
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end;
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initialization
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TMVCApplicationSessionFactory.GetInstance.RegisterSessionType('memory',
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TWebApplicationSessionMemory);
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finalization
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TMVCApplicationSessionFactory.FInstance.Free;
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end.
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