dependency-injection

问题 I'm a beginner with spring and I am having problem with basic context init and I can't find any easy tutorial. So what I want to do is basic dependency injection and I have seen I only have to mark classes as @Componant or @Service and inject them directly within target fiels with @Autowired. For this I need to set properly my spring context (I'll need to build a web service + use JPA so I want to build a webapp) I'm using JDK 1.8, maven 3.2.1 I want to do a basic dependency injection. => I

问题 So thanks to ng-annotate, now we can minify our code successfully when it looks like this: angular.module('YeomanApp') .controller('YeoCtrl', function ($scope) { $scope.awesomeThings = [ 'HTML5 Boilerplate', 'AngularJS', 'Karma' ]; }); Are there any advantages to this form over this form: angular.module('YeomanApp') .controller('YeoCtrl', ['$scope', function ($scope) { $scope.awesomeThings = [ 'HTML5 Boilerplate', 'AngularJS', 'Karma' ]; }]); The latter explicit dependency declaration seems

问题 While integrating StructureMap.MVC5 to an ASP.Net MVC5 web application, realized that it uses 3.1 version of SM and not 4+. Then tried taking the files included in this Nuget and changing it for SM4, but a lot of code was there and several incompatible calls across SM3.1 and SM4. With that, I ended up writing a simple IoC as below. Looking for advise on its shortfalls and what inefficiencies this have compared to the Nuget version linked here. Define Default Registry public class

问题 InvalidOperationException: Cannot resolve scoped service 'DrinkAndGo.Data.AppDbContext' from root provider. DrinkAndGo.Data.DbInitializer.Seed(IApplicationBuilder applicationBuilder) in DbInitializer.cs +13 AppDbContext context = DrinkAndGo.Startup.Configure(IApplicationBuilder app, IHostingEnvironment env) in Startup.cs +46 DbInitializer.Seed(app); using DrinkAndGo.Data.Models; using Microsoft.AspNetCore.Builder; using Microsoft.Extensions.DependencyInjection; using System.Collections

问题 I have been reading the official Session and application state documentation and have stumbled upon the following paragraph: Loading Session asynchronously The default session provider in ASP.NET Core loads the session record from the underlying IDistributedCache store asynchronously only if the ISession.LoadAsync method is explicitly called before the TryGetValue , Set , or Remove methods. If LoadAsync is not called first, the underlying session record is loaded synchronously, which could

问题 I have been reading the official Session and application state documentation and have stumbled upon the following paragraph: Loading Session asynchronously The default session provider in ASP.NET Core loads the session record from the underlying IDistributedCache store asynchronously only if the ISession.LoadAsync method is explicitly called before the TryGetValue , Set , or Remove methods. If LoadAsync is not called first, the underlying session record is loaded synchronously, which could

问题 Does anyone have a list of link(s) on the www for a good list of DI gotchas? I have been trying to inject controls using DI, in an asp.net webforms app and found that on recursive build up that ViewState is lost. Also would be helpful a list of articles where the developer needs to be aware to gotchas before taking teh big step in implementing IoC/DI in the app. 回答1: DI itself has no gotchas. Or more precisely, it would be like enumerating general programming gotchas, like passing a null

问题 Here I have a singleton, that I whant to inject to my application @Singleton @Path("singleton-bean") public class MyContext { private MyContext() { instances++; } private static MyContext instance; public static MyContext getInstance(){ if (instance == null) instance = new MyContext(); return instance; } public static int instances = 0; } Here's how I register it: @ApplicationPath("webresources") public class ApplicationConfig extends Application { @Override public Set<Object> getSingletons()

问题 I can't find right words for my question so i will let my code speak instead. I have Repository: class Repository { public Repository(DbContext ctx) { } } then i have this bindings: Bind<IRepository>().To<Repository>(); Bind<DbContext>().To<UserStoreContext>().When... Bind<DbContext>().To<CentralStoreContext>().When... and then i have class that needs to access both db's class Foo { public Repository(IRepository userRepo, [CentralStoreAttribute]IRepository centralRepo) { } } How should i

问题 I can't find right words for my question so i will let my code speak instead. I have Repository: class Repository { public Repository(DbContext ctx) { } } then i have this bindings: Bind<IRepository>().To<Repository>(); Bind<DbContext>().To<UserStoreContext>().When... Bind<DbContext>().To<CentralStoreContext>().When... and then i have class that needs to access both db's class Foo { public Repository(IRepository userRepo, [CentralStoreAttribute]IRepository centralRepo) { } } How should i