dependency-injection

问题 I see that Composite pattern and dependency injection means public function __construct(ClassToUseInterface $class) { $this->class = $class } So, what's the difference ? 回答1: The code as presented in your question neither represents dependency-injection, nor does it represent the composite pattern. Your code represents what is known as Dependency inversion. Let's answer your question : One way for your code to truly represent Dependency injection is to call the construct function from code

问题 Hi, I'm about 2 weeks into building my application with ember.js, and the time has come to pull together my project layout into its final shape. To that end, I started looking into using Ember's register / inject mechanism instead of just creating global singletons and attaching them to my App object (for an excellent description of dependency injection in Ember, see here) I'm stuck with standard dependency injection dilemma - circular references. Let's say, I have two manager-like classes

问题 I want to write a factory for creating various types of "xxNotification" classes. My concrete "xxNotification" has dependencies registered with AutoFac. I would like to get/resolve instance of "xxNotification" using Autofac. How to do that? public interface INotification { void Notify(string Action, int OrderID); } public class MagentoOrderStateNotification : INotification { private readonly GenericRepository<Order> _orderRepository; private readonly OMRestIntegrationService

问题 I want to write a factory for creating various types of "xxNotification" classes. My concrete "xxNotification" has dependencies registered with AutoFac. I would like to get/resolve instance of "xxNotification" using Autofac. How to do that? public interface INotification { void Notify(string Action, int OrderID); } public class MagentoOrderStateNotification : INotification { private readonly GenericRepository<Order> _orderRepository; private readonly OMRestIntegrationService

问题 I am in this situation where my service interface is being implemented by two service classes. For example, IFooService is implemented by FooService and FooWithExtraInfoService Here is the interface: public interface IFooService { Foo GetEntity(string fieldName, stringFieldValue); } Here is FooService : public class FooService: BarService, IFooService { public FooService(ILogService logservice): base(logservice) { } public Foo GetEntity(string fieldName, string fieldValue) { //here goes the

问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 7 years ago . I've been reading about DI and best practices, and still haven't found the answer to this question. When should I use interfaces? Some

问题 I'm starting a Primefaces/Spring/Hibernate project and I'm still learning how to handle those components properly. But at this right moment, I'm facing a problem related to spring dependency injection that is freaking me out. I've been look for an answer for two days over the web and couldn't find what is wrong with my code. I've tried both approaches to autowire (@Autowire ans @Inject). Could someone take a look at my code and check what's going wrong ? My code is below. Here is the error

问题 Please note that I have changed the code in the question. Please see the server side code below (WCF Service): using System.ServiceModel; using System.ServiceModel.Web; using System.Text; using Castle.MicroKernel.Registration; using Castle.MicroKernel.SubSystems.Configuration; using Castle.Windsor; namespace WcfService1 { public class WindsorInstaller : IWindsorInstaller { public void Install(IWindsorContainer container, IConfigurationStore store) { container.Register( Component.For<IGreeting

问题 I want to use Unity dependency injection in WPF application. My Window throw System.Windows.Markup.XamlParseException: "For type MainWindow found no default constructor". This is my code: App.xaml.cs: IUnityContainer container = new UnityContainer(); container.RegisterType<MainWindow>(); container.RegisterType<IService, MyService>(); container.RegisterType<IRepository, MyRepository>(); container.Resolve<MainWindow>().Show(); MainWindow.xaml.cs: public MainWindow(IService service) {

问题 I'm having some issues with injection in the application I'm working on (using Spring Version 3.1.2). To start with, I'm seeing a lot of code like this: @Value("#{searchRequestBean}") private SearchRequest searchRequest; @Value("#{searchResponseBean}") private SearchResponse searchResponse; @Autowired private SavedSearchService service; Each of these three appears to have the effect of autowiring the specified bean/service into the class. What I don't understand is, what's the difference