dependency-injection

问题 Hope the Question is self explanatory ClassA.java @Component @Scope(ConfigurableBeanFactory.SCOPE_PROTOTYPE) public class ClassA implements InterB { private static int counter=0; private int objectid = 0; @Autowired InterA abcd; public ClassA() { super(); this.objectid = ++counter; } @Override public void dododo() { System.out.println("instance number "+objectid++); abcd.doit(); } } ClassB.java @Component @Conditional(OracleDBEngineCondition.class) public class ClassB extends DummyParent

问题 I have a controller in my angular application that requires some server-side initialization. I would like to do it synchronously, meaning that the data should be fetched before the controller is initiated. I synchronously load and inject data into many other controllers using the routeProvider in application configuration: $routeProvider .when('/Home', { templateUrl: 'default/home', controller: 'homeController', resolve: { 'InitPageData': ['initPageService', function (initPageService) {

问题 I am reading the Pro Spring 2.5 book and I have a question to how dependency injection works. I understand the BeanFactory and doing dependency lookups. Now I read about dependency injection and I have some questions. Based on what I understand you want to limit the lookups to the minimum such as looking up an object for boot strapping the application. Then dependency injection will take care of the rest. However I don't understand this works. Let say you have a beanfactory, you get an

问题 Stuck on this problem for a while. I'm trying to integrate Tomcat 9, JDK 10, Jersey 2.23, HK2 (for DI) along with Automatic dependency injection. I've followed this tutorial, but getting below error, I've searched a lot but couldn't find anything on that. I've used dependency to generate "META-INF/hk2-locator/default" which is getting generate properly. Dependency <dependency> <groupId>org.glassfish.hk2</groupId> <artifactId>hk2-metadata-generator</artifactId> <version>2.4.0</version> <

问题 I have a project using Jersey v2.25.1. I was using Jersey's inbuilt HK2 injection to perform dependency injection, and everything worked fine. Fast forward to now, I decided to update to Jersey v2.27. When I ran my project, I got the following exception: java.lang.IllegalStateException: InjectionManagerFactory not found After some googling, I found that I needed to add the jersey-hk2 dependency. Doing so made me get the following exception: org.glassfish.hk2.api.UnsatisfiedDependencyException

问题 I'm trying to retro-fit (bad idea I know, but better late than never) IOC and DI into an existing solution. The code base is made of up about 30 projects, each which have classes in them which have little or no visibility to the outside world. Being relatively new to the IOC thing I'm trying to use best practise when reworking the code, and it seems best not to pass the IOC container around or make it static, hence I'm trying to do everything via constructor injection. However, and here comes

问题 I'm trying to use autofac DI in my application. I created a wrapper class to abstract away all the autofac dlls: FrameworkDependencyResolver : Logger, IFrameworkDependencyResolver In this class I hold the container builder, and register all my dependencies in the application root. After registering my types I build it and hold the container: Icontainer _container; ContainerBuilder _builder public FrameworkDependencyResolver() { _builder = new ContainerBuilder(); } Deep in my application i

问题 I am using windsor castle as my IoC container, and has run in to a bit of a problem. This is best explained in code, so I´ll give it a try. I have a factory class, that should provide me with implementations of a certain interface: public interface IObjectCreatorFactory { IObjectCreator GetObjectCreator(Type objectType); } public interface IObjectCreator { T CreateObject<T>(IDataRow data); bool SupportsType(Type type); } Implementation of the factory class could look like this, though I am

问题 This question already has answers here : Closed 9 years ago . Possible Duplicate: Help with Dependency Injection in .NET Hi friends, It is a couple of days that I've been seeing Dependency Injection in some websites ! Would you please say : What is it ? What's the benefits of using it ? Thanks a lot. 回答1: Dependency Injection is a very simple concept (the implementation, on the other hand, can be quite complex). Dependency Injection is simply allowing the caller of a method to inject

问题 I'm using Ninject to resolve dependencies and it's working swimmingly until now. In this example, I actually need a list of objects initialized based on data stored in my App.config. However, Ninject keeps returning an empty list. The snippet below is an example of what I tried. I've included the constructors for the class hierarchy for some context. public ServiceSchedulerBuilder(IList<ITextExportService> textExportServices) { _textExportService = textExportServices; } public