inversion-of-control

问题 My view controllers need to send messages to a couple of model objects. How do I obtain references to these model objects inside the view controller? These model objects are "singletons" (in that there should only be one copy of them in the system at once) and they are used by multiple view controllers. So I can't instantiate them in the init method of each view controller. I can't use constructor injection as the runtime chooses the init method that gets used to create the view controller. I

问题 My view controllers need to send messages to a couple of model objects. How do I obtain references to these model objects inside the view controller? These model objects are "singletons" (in that there should only be one copy of them in the system at once) and they are used by multiple view controllers. So I can't instantiate them in the init method of each view controller. I can't use constructor injection as the runtime chooses the init method that gets used to create the view controller. I

问题 My view controllers need to send messages to a couple of model objects. How do I obtain references to these model objects inside the view controller? These model objects are "singletons" (in that there should only be one copy of them in the system at once) and they are used by multiple view controllers. So I can't instantiate them in the init method of each view controller. I can't use constructor injection as the runtime chooses the init method that gets used to create the view controller. I

问题 What I want: Resolve object A, and inside object A, I want use same container to resolve object C: public static void Work() { IUnityContainer con = new UnityContainer(); con.RegisterType<IA, A>(); con.RegisterType<IB, B>(); con.RegisterType<IC, C>(); var a = con.Resolve<IA>(); } interface IA { } interface IB { } interface IC { } class A : IA { public A(IB b, IUnityContainer con) { for (int i = 0; i < 10; i++) { var c = con.Resolve<IC>(); } } } class B : IB { }; class C : IC { }; Problem: On

问题 I need some help to understand what it's wrong in my configuration of the container. I based this implementation by using this example. Basically i need to implement some use case as database command based on that interface public interface IDatabaseCommand<TResult, TParam> { TResult Execute(TParam commandParam); } and i want to use a decorator that add the transaction safe functionality. Every command need to use a dedicated DbContext and the transaction has to be executed on that context To

问题 I am generally a c# developer but working on Java now and then I see a lot of dependency injection using Spring on private properties, with no public way of setting the value. I was surprised this actually works, but I guess it’s possible via reflection? Surely this is terrible practice?! I can't see how anyone unit testing or inspecting the class would possibly know that a private member needs to be set from some external framework. How would you even set the property when you are unit

问题 I have trouble with dependencies in my application in service layer. I have following class: <?php class UserService{ private $userRepository; private $vocationService; private $roleService; public function __construct(UserRepository $userRepository, VocationService $vocationService, RoleService $roleService) { $this->userRepository = $userRepository; $this->vocationService = $vocationService; $this->roleService = $roleService; } } There are only three dependencies which I'm injecting. Assume

问题 I've written a generic hubs which I'm having some issues with so to debug it I've decided to make a simple connection count like so: public class CRUDServiceHubBase<TDTO> : Hub, ICRUDServiceHubBase<TDTO> { public const string CreateEventName = "EntityCreated"; public const string UpdateEventName = "EntityUpdated"; public const string DeleteEventName = "EntityDeleted"; protected int _connectionCount = 0; public Task Create(TDTO entityDTO) { return Clients.All.InvokeAsync(CreateEventName,

问题 I am watching this course video about dependency injection and the instructor talked about di-container but did not explain in detail, now I read some articles and I want to confirm that now I am getting this right. Below is simple program and my question is, Is Program class below is kind of simplest di-container? if not how would simple di-container would be like interface Implementable { void doSmth(); } class A implements Implementable { @Override public void doSmth() { } } class B {

问题 I am trying to register a type by convention, I've simplified my case in this example: public abstract class BaseEntity{} public class EntityA : BaseEntity{} public class EntityB : BaseEntity{} public abstract class BaseClass { //... } public abstract class GenericBaseClass<T> : BaseClass where T : BaseEntity { //.. } public class ConcreteA : GenericBaseClass<EntityA> { //... } public class ConcreteB : GenericBaseClass<EntityB> { //... } I'm trying to find the way to register GenericBaseClass