dependency-injection

问题 I have a bit of a problem with understanding why @Context dependency injection returns collection of $Proxy(random number) instances instead of HttpServletRequest or HttpServletResponse. I am using Glassfish 3.1.2.2 with it's version of Jersey(Jersey: 1.11.1) and my app is built as EAR application. I have simple @Remote interface where I annotate my methods and REST services work without any problems, but the moment I try to access HttpServletRequest information it just causes problems. I

问题 I am using Ninject MVC3(version 3.0.0.0) for my ASP.Net MVC3 application installed using NuGet Package for Dependency Injection. Here is the Global.asax change: public class MvcApplication : NinjectHttpApplication { public static void RegisterGlobalFilters(GlobalFilterCollection filters) { filters.Add(new HandleErrorAttribute()); } public static void RegisterRoutes(RouteCollection routes) { routes.IgnoreRoute("{resource}.axd/{*pathInfo}"); routes.IgnoreRoute("favicon.ico"); routes.IgnoreRoute

问题 I believe this questions has been asked in some or the other way but i'm not getting it yet. We do a GWT project and my project leader disallowed to use GIN/Guice as an DI framework (new programmers are not going to understand it, he argued) so I try to do the DI manually. Now I have a problem with deep object graphs. The object hierarchy from the UI looks like this: AppPresenter->DashboardPresenter->GadgetPresenter->GadgetConfigPresenter The GadgetConfigPresenter way down the object

问题 In C++ I often use RAII-style objects to make code more reliable and allocate them on stack to make code more performant (and to avoid bad_alloc). But creating an object of concrete class on stack violates the dependency inversion (DI) principle and prevents mocking this object. Consider the following code: struct IInputStream { virtual vector<BYTE> read(size_t n) = 0; }; class Connection : public IInputStream { public: Connection(string address); virtual vector<BYTE> read(size_t n) override;

问题 I'm looking for a way to set up Log4j (or any other logger) so that I can see in log whenever Spring creates a bean or sets a bean property. Eg. something like this: 1:00:00 Creating bean Foo (Foo@ef5c94) 1:00:01 Creating bean Bar (Bar@147a87e) 1:00:02 Setting bean Foo (Foo@ef5c94) to Bar (Bar@147a87e) (...) Is this easily possible? I'm using Spring 2.5.6 (no choice there :/ ) and Log4j (version doesn't matter I expect). 回答1: Looks like org.springframework.beans.factory.support

问题 Our company creates an ejb in two artifacts. The impl artifact contains the implementations and the client artifact contains all the interfaces. This means that the impl artifact has a compile dependency on the client artifact. Now at runtime, the client artifact needs the impl artifact - otherwise the container cannot inject the required objects. This means that an ear needs to contain the impl artifacts for all client artifacts. Does this mean that the client artifact should have a runtime

问题 How do I inject a constant into some class using HK2 in jersey? With Guice I could have some class like public class DependsOnFoo { @Inject public DependsOnFoo(@Named("FOO") String foo) { ... } ... } and I would configure it in the injector with something like bind(String.class).named("FOO").toInstance(new String("foo")) What's the equivalent, if any, in HK2? 回答1: I'm in the process of learning hk2 coming from Guice. Honestly I am still in the weeds a little with the complexity of hk2 vs the

问题 I'm registering a service as a singleton in .NET Core. Yet I'm seeing the constructor for the singleton called multiple times. services.AddSingleton<DbAuthorizationOptions, ContextAuthorizationOptions>(); My context authorization options is just Dictionary of Entity Types to IValidators , The context authorization options are passed into the DBContext , to automatically run validations. During the registration of my services, I also register dynamic Validators with my container registered in

问题 I need to inject by @Autowired concrete implementation of a service class. Service interface: public interface PostService { ... } Implementation: @Service("postServiceImpl") public class PostServiceImpl implements PostService { ... } Methods in the service are with @ Transactional annotation And now I want to inject postServiceImpl to my controller - because I need to use one method from the implementation, that is not in the interface: @Autowired @Qualifier("postServiceImpl") private

问题 I would like to use dependency injection in a large Java 7 standalone application, but I am not really sure where to start. I have written a small test application: public class Main { @Inject MyInterface myInterface; public static void main( String[] args ) { Main m = new Main(); System.out.println(m.myInterface.getMessage()); } } with an interface: public interface MyInterface { String getMessage(); } and an interface implementation: @Singleton public class MyInterfaceImpl implements