dependency-injection

问题 We use Spring's JdbcTemplate which is configured through Spring config as illustrated below. Is there a way to do this without injecting the data source? I'd like to just create the JdbcTemplate instance programmatically and "initalize" the datasource using TheOracleDS . Our current config: Java class private JdbcTemplate jdbcTemplate; @Resource(name = "myDataSource") public void setDataSource(DataSource dataSource) { this.jdbcTemplate = new JdbcTemplate(dataSource); } Spring config <jee:jndi

问题 The interfaces,commands and command handler set up as per instructions in Simpleinjector wiki. public interface ICommand { string Name { get; set; } } public class Command1 : ICommand { public string Name { get; set; } } public class Command2 : ICommand { public string Name { get; set; } } public interface ICommandHandler<TCommand> { void Execute(TCommand Command); } public class Command1Handler : ICommandHandler<Command1> { public void Execute(Command1 Command) { Console.WriteLine(Command

问题 Spring does DI and creates objects so that your program need not worry of creating objects. But the question here is when an instance of injected object is created. Is it when the main program makes use of the instance or at the time an instance of main program is created. 回答1: All beans in the context are instantiated, injected and initialized when the context starts up. By the time the first bean has been retrieved from the context, all beans are ready for use. There are two things that can

问题 I have started refactoring a small application to use a small DI container instead of having $registry::getstuff(); calls in my classes I inject them in a container. This has raised 2 questions, Q1 -> I extend Pimple DI class and create a container with dependencies specific to each object that will need DI. I then feed the object the whole shebang, and decrontruct it it in the constructor assigning the DI's objects to the class properties of the object I'm building. Should I be separating

问题 Not sure if this is possible or not. I need to return the correct implementation of a service based on an enum value. So the hand-coded implementation would look something like: public enum MyEnum { One, Two } public class MyFactory { public ITypeIWantToCreate Create(MyEnum type) { switch (type) { case MyEnum.One return new TypeIWantToCreate1(); break; case MyEnum.Two return new TypeIWantToCreate2(); break; default: return null; } } } The implementations that are returned have additional

问题 If I create a BaseController in my Asp.Net Core 2.0 web application that capsulizes some of the common dependencies are they still necessary in the actual controllers. For Example, the standard Account and Manage controllers in a default MVC 6 web application. public class AccountController : Controller { private readonly UserManager<ApplicationUser> _userManager; private readonly SignInManager<ApplicationUser> _signInManager; private readonly IEmailSender _emailSender; private readonly

问题 I have a small framework and I coded it like this. I'm not sure if it is called dependency injection or not. I don't know if it is like a design pattern or not. I also don't know and wonder if passing $this as param is a bad practice. Have a look at this; (Not a working example, just wrote those codes into browser for explanation.) /* This is engine model */ require_once('Database.class.php'); require_once('Image.class.php'); require_once('Misc.class.php'); require_once('BBCode.class.php');

问题 I'm trying to migrate a Playframework application from 2.4 to 2.5.3 and I have problems to get values from application.conf file: Before to get a value of from application.conf what I do was: Play.application().configuration().getString("label") Now as Play.application() is deprecated, I should use Dependency injection. Based on the framework documentation I use the following instructions: Define import : import javax.inject.*; import play.Configuration; Define class property : @Inject

问题 I am receiving the following strange dependency injection behavior when using custom HttpInterceptors in angular 5+. The following simplified code works fine: export class AuthInterceptor implements HttpInterceptor { constructor(private auth: AuthService) {} intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> { const token = this.auth.getToken(); return next.handle(req); } } export class AuthService { token: string; constructor() { console.log('AuthService

问题 I am using javaFX with Scene Builder in my project and I have many pages. I want to avoid complexity, that's why I want to use Spring framework. So please can anyone explain to me in details how to configure JavaFX with spring framework? 回答1: I searched for Spring and JavaFX integration sample but could not find a good one. So I worked on an example. You can look at this example application. https://gitlab.com/sunkur/SpringJavaFXController I hope it helps. 回答2: There are many ways to