我的主要ASP.NET MVC组合应用程序使用全局Unity容器来注册类型.该应用程序将控制器工厂设置为使用此全局容器.我想重构这一点,以便我的每个可移植区域都利用它自己的子Unity容器,以便不同的区域可以以不同的方式实现接口.看起来每个区域需要一个不同的ControllerFactory.我将如何实现这一目标,因为以下内容为所有人设置工厂？
ControllerBuilder.Current
.SetControllerFactory(/* controller factory with global unity container */);
解决方法
您可以使用包含每个区域的所有IControllerFactory实现的MasterControllerFactory,并知道哪个工厂可以构建哪个RequestContext.这实际上允许您为任何变体选择不同的ControllerFactory,而不仅仅是按区域.以下是它的工作原理：
所有区域控制器工厂实现必须实现IFilteredControllerFactory而不是IControllerFactory.这里是：
public interface IFilteredControllerFactory:IControllerFactory
{
bool CanHandle(RequestContext requestContext);
}
基于区域名称进行过滤的实现示例如下所示：
public class Area51ControllerFactory:IFilteredControllerFactory
{
public bool CanHandle(RequestContext requestContext)
{
return requestContext.RouteData.DataTokens["area"].ToString().ToLowerInvariant() == "area51";
}
public IController CreateController(RequestContext requestContext,string controllerName)
{
// create a controller...
}
public void ReleaseController(IController controller)
{
// release the controller...
}
}
然后你需要MasterControllerFactory,它看起来像这样：
public class MasterControllerFactory : DefaultControllerFactory
{
private readonly List<IFilteredControllerFactory> _slaveFactories;
public MasterControllerFactory()
{
_slaveFactories = new List<IFilteredControllerFactory>();
}
public void RegisterFactory(IFilteredControllerFactory slaveFactory)
{
if(slaveFactory!=null && !_slaveFactories.Contains(slaveFactory))
{
_slaveFactories.Add(slaveFactory);
}
}
public override IController CreateController(RequestContext requestContext,string controllerName)
{
var factory = _slaveFactories.FirstOrDefault(x => x.CanHandle(requestContext));
if(factory!=null)
{
return factory.CreateController(requestContext,controllerName);
}
return base.CreateController(requestContext,controllerName);
}
public override void ReleaseController(IController controller)
{
bool released = false;
if (controller is Controller)
{
var requestContext = ((Controller) controller).ControllerContext.RequestContext;
var factory = _slaveFactories.FirstOrDefault(x => x.CanHandle(requestContext));
if (factory != null)
{
factory.ReleaseController(controller);
released = true;
}
}
if(!released)base.ReleaseController(controller);
}
}
在global.asax的Application_Start中,您仍然需要设置所有内容,但这很容易.
var masterControllerFactory = new MasterControllerFactory(); masterControllerFactory.Register(new Area51ControllerFactory()); ControllerBuilder.Current.SetControllerFactory(masterControllerFactory);
显然,您可以通过多种方式调整这种方式,以便最好地利用您的编码风格和应用程序架构.
