[英]Registering a singleton via SimpleInjector and return the same instance, for different interfaces it implements
Imagine I have the below: 想象一下,我有以下内容:
public interface IocInterface1 { }
public interface IocInterface2 { }
public class IocImpl : IocInterface1, IocInterface2 { }
I would like that if I try to get any instance of the above classes/interfaces via IoC, I get the exact same instance, not one singleton per type. 我想如果我尝试通过IoC获取上述类/接口的任何实例,我得到完全相同的实例,而不是每个类型一个单例。 Example,
b1
and b2
below should be true: 例如,下面的
b1
和b2
应该是真的:
_container.RegisterSingle<IocInterface1, IocImpl>();
_container.RegisterSingle<IocInterface2, IocImpl>();
_container.RegisterSingle<IocImpl, IocImpl>();
var test1 = _container.GetInstance<IocInterface1>();
var test2 = _container.GetInstance<IocInterface2>();
var test3 = _container.GetInstance<IocImpl>();
bool b1 = test1 == test2;
bool b2 = test2 == test3;
Is this possible? 这可能吗?
If you want to register a multiple types with the same registration then you will need a singleton registration object for your implementation type IocImpl
. 如果要注册具有相同注册的多个类型,那么您将需要一个用于实现类型
IocImpl
的单例注册对象。
Then you need to use AddRegistration
to add this registration for the different services: IocInterface1
, IocInterface2
etc.: 然后,您需要使用
AddRegistration
为不同的服务添加此注册: IocInterface1
, IocInterface2
等:
var _container = new Container();
var registration =
Lifestyle.Singleton.CreateRegistration<IocImpl, IocImpl>(_container);
_container.AddRegistration(typeof(IocImpl), registration);
_container.AddRegistration(typeof(IocInterface1), registration);
_container.AddRegistration(typeof(IocInterface2), registration);
as described in the documenation: Register multiple interfaces with the same implementation 如文档中所述: 使用相同的实现注册多个接口
Alternatively, you can also make a mapping using delegates: 或者,您也可以使用委托进行映射:
_container.RegisterSingle<IocImpl>();
_container.RegisterSingle<IocInterface1>(() => container.GetInstance<IocImpl>());
_container.RegisterSingle<IocInterface2>(() => container.GetInstance<IocImpl>());
In most cases both examples are functionally equivalent, but the former is preferred. 在大多数情况下,两个例子在功能上都是等同的,但前者是优选的。
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