dependency-injection

问题 I'm still at the beginning in learning scala in addition to java and i didn't get it how is one supposed to do DI there? can or should i use an existing DI library, should it be done manually or is there another way? 回答1: Standard Java DI frameworks will usually work with Scala, but you can also use language constructs to achieve the same effect without external dependencies. 回答2: A new dependency injection library specifically for Scala is Dick Wall's SubCut. Whereas the Jonas Bonér article

问题 I am having problems creating a custom UserStore using dependency injection when creating an ApplicationUserManager using the OWIN request pipeline. Background I am trying to migrate the user functionality in our web application from using the SimpleMembership to the new ASP.NET Identity. When starting a new MVC 5 project, the default implementation of the single page application uses ASP.Identity, using Entity Framework to implement the UserStore functionality. In my case, we are already

问题 So I have some plugins and libraries I want to use in my angular app and (currently) I am simply referencing those functions/methods as they were intended in 99% of apps in a way that completely ignores dependency injection. I have (for example) the javascript library "MomentJS" which deals with formatting and validating dates and I have uses for it throughout my app in controllers, services and filters. The way that I've learned (using AngularJS) is to create a service that references the

问题 I have been trying to implement Dagger2. Problem: When I use constructor injection, it works fine but when I use field injection, it throws an Error like below: Error:(6, 48) error: cannot find symbol class DaggerApplicationComponent /home/moderator/Downloads/Maulik/Sample Codes/Made/Dagger2Demo/app/src/main/java/com/dagger2demo/dagger2demo/di/component/ApplicationComponent.java Error:(18, 10) error: com.dagger2demo.dagger2demo.mvp.HomePresenter cannot be provided without an @Inject

问题 I'm using Unity and inject all my dependencies. Let's say that I have a Manager class like so public class Manager : IManager { public Manager(IRepository repository, string customerName) { } } And a repository class like: public class Repository : IRepository { public Repository(string customerName) { } } I'm using WCF and will resolve the manager and the repository once per request. I register all my types at service startup, but at startup i do not know the "customerName"-parameter. This

问题 Having trouble getting the value of a ConstructorArgument parameter passed to kernel.Get(). I want to use the parameter's value to determine which of two string values will be passed into the constructor. The parameter is in fact there when expected, I just can't get at its value. I end up with a null ref exception after calling the parameter's GetValue method: namespace MyNS.DBProviders { public abstract class DBProviderBase { private ObjectContext _db; public DBProviderBase(ObjectContext db

问题 My problem is simple! How can I resolve manually this registered interface: services.AddScoped<ICommandHandler<Command>, AddProductCommandHandler>(); This code not work and always return null : My DiContainer is like this: public class ProviderDiContainer : IDiContainer { private readonly ServiceProvider _container; public ProviderDiContainer(ServiceProvider container) { _container = container; } public T Resolve<T>() { return _container.GetService<T>(); } } Which is registered such: public

问题 My problem is simple! How can I resolve manually this registered interface: services.AddScoped<ICommandHandler<Command>, AddProductCommandHandler>(); This code not work and always return null : My DiContainer is like this: public class ProviderDiContainer : IDiContainer { private readonly ServiceProvider _container; public ProviderDiContainer(ServiceProvider container) { _container = container; } public T Resolve<T>() { return _container.GetService<T>(); } } Which is registered such: public

问题 I am creating one demo application to learn how to use repository pattern for performing Insert operation.I am using Nop Commerce**(http://www.nopcommerce.com) **code for repository pattern Error :No parameterless constructor defined for this object I have seen this link:MVC: No parameterless constructor defined for this object This is my Structure: My Repository interface : public partial interface IRepository<T> { void Insert(T entity); } My Service Layer : public partial interface

问题 I have a bean in module1-spring.xml - <bean id="parent" class="com.Parent"/> <bean id="service" class="com.Service"> <property name="parent" ref="parent"/> </bean> I want to override the bean in module2-spring.xml - <bean id="child" class="com.Child" parent="parent"/> I want child to be passed in service instead of parent . If I alias child as parent i.e. <alias id="child" alias="parent"/> then the parent attribute will read child instead of parent bean and fail on server startup with error-