delphidicontainer

A (simple) Delphi Dependency Injection Framework for Delphi 2010 or better on Windows and MacOSX.

program Test01;
{$APPTYPE CONSOLE}

uses
  SysUtils,
  DIContainer in 'DIContainer.pas',
  ServiceTestObjectsU in '..\UnitTest\ServiceTestObjectsU.pas';

var
  DIContainer: TDIContainer;
  s1: TService1;
  s2: TService2;
  s3: TService3;
  s6: TService6;
  s7: TService7;
begin
  ReportMemoryLeaksOnShutdown := True;
  try
    DIContainer := TDIContainer.Create;
    try
      // AddComponent with TClass with and   InitType = Singleton
      DIContainer.AddComponent(TService1, TDIContainerInitType.Singleton);
      
      // AddComponent with QualifiedName and InitType = Singleton
      DIContainer.AddComponent('ServiceTestObjectsU.TService2', TDIContainerInitType.Singleton);
      // AddComponent with QualifiedName and InitType = CreateNewInstance
      DIContainer.AddComponent('ServiceTestObjectsU.TService3', TDIContainerInitType.CreateNewInstance);
      // GetComponent with QualifiedName
      s1 := DIContainer.GetComponent('ServiceTestObjectsU.TService1') as TService1;
      s1.Message := 'I''m the first message';
      WriteLn(s1.Message);

      // GetComponent with TClass
      s2 := DIContainer.GetComponent(TService2) as TService2;
      s2.Message := 'I''m the second message';
      WriteLn(s2.Message);

      // GetComponent with a dependent service (TService3 depends upon TService1 and TService2)
      s3 := DIContainer.GetComponent('ServiceTestObjectsU.TService3') as TService3;
      WriteLn(s3.GetCompoundMessage);
      // s3 is not created as Singleton, so after use it I must free it
      s3.Free;

      // AddComponent with QualifiedClassName, a custom initializer, an alias.
      // Component will be created as singleton (single instance managed by Container)

      DIContainer.AddComponent(DIContainerUtils.GetQualifiedClassName(TService6),
          function: TObject
          begin
            Result := TService6.Create(DIContainer.Get(TService1) as TService1,DIContainer.Get(TService1) as TService1);
          end,
          'srv6',
        TDIContainerInitType.Singleton);

      s6 := DIContainer.Get('srv6') as TService6;
      WriteLn(s6.ToString);
      s6 := DIContainer.Get('srv6') as TService6;
      WriteLn(s6.ToString);

      // AddComponent with QualifiedClassName, a custom initializer, an alias.
      // Component will be created as singleton (single instance managed by Container)
      DIContainer.AddComponent(DIContainerUtils.GetQualifiedClassName(TService7),
            function: TObject
            begin
              Result := TService7.Create(DIContainer.Get(TService1) as TService1,DIContainer.Get(TService1) as TService1);
            end,
            'srv7intf',
          TDIContainerInitType.Singleton);

      s7 := DIContainer.Get('srv7intf') as TService7;
      WriteLn(s7.ToString);
    finally
      DIContainer.Free;
    end;
  except
    on E: Exception do
      WriteLn(E.ClassName, E.Message);
  end;
  // readln;
end.