泽西岛 2.*.如何替换 Jersey 1.* 的 InjectableProvider 和 AbstractHttpContextInjectable [英] Jersey 2.*. How to replace InjectableProvider and AbstractHttpContextInjectable of Jersey 1.*

问题描述

我想创建一个类，其对象可以使用 @Context 注释(或者更好的自定义注释，用于需要将参数传递给注释的情况)注入到资源方法中.在 Jersey 1.* 我会使用 InjectableProvider(在我的例子中与 AbstractHttpContextInjectable 一起使用).我想要实现的是类似于 @Auth [1] 来自 dropwizard(使用 Jersey 1.7).

I would like to create a class whose objects can be injected using the @Context annotation (or better yet a custom annotation for cases where I need to pass an argument to the annotation) into resource methods. In Jersey 1.* I would have used InjectableProvider (in my case together with AbstractHttpContextInjectable). What I'm trying to achieve is something like @Auth [1] from dropwizard (which uses Jersey 1.7).

据我所知，Jersey 的注入功能已被 HK2 取代，我找不到我所描述的任何示例.

The injection capabilities of Jersey were replaced by HK2 as far as I know and I could not find any example of what I'm describing.

见这个问题 我在尝试遵循 Michal 指南时遇到的其他问题.

See this question for further problems I have encountered while trying to follow Michal's guide.

推荐答案

你需要实现InjectionResolver 接口来自 HK2.查看 Jersey 工作区中的现有实现:

You need to implement InjectionResolver<T> interface from HK2. Take a look at existing implementations that are present in Jersey workspace:

• ContextInjectionResolver 处理 @Context
• ParamInjectionResolver 处理 @PathParam、@QueryParam、...(通过它的子类)
• AutowiredInjectResolver 处理 @Autowired

• ContextInjectionResolver handling @Context
• ParamInjectionResolver handling @PathParam, @QueryParam, ... (via it's subclasses)
• AutowiredInjectResolver handling @Autowired

一旦你有了这个，你需要扩展来自HK2的>AbstractBinder并通过它的#configure()方法绑定你的InjectionResolver:

Once you have this, you need to extend AbstractBinder from HK2 and bind your InjectionResolver via it's #configure() method:

public class MyResolverBinder extends AbstractBinder {

    @Override
    protected void configure() {
        bind(MyInjectionResolver.class)
                .to(new TypeLiteral<InjectionResolver<MyAnnotation>>() {})
                .in(Singleton.class);
    }
}

... 并在您的应用程序类中注册此绑定器的实例(或通过 功能):

... and register an instance of this binder in your application class (or via feature):

功能:

public class MyFeature implements Feature {

    @Override
    public boolean configure(final FeatureContext context) {
        context.register(new MyResolverBinder());
        return true;
    }
}

注册MyFeature到Application:

public class JaxRsApplication extends Application {

    @Override
    public Set<Class<?>> getClasses() {
        final HashSet<Class<?>> classes = new HashSet<Class<?>>();
        classes.add(MyFeature.class);
        // Register other providers or resources.
        return classes;
    }
}

在ResourceConfig

new ResourceConfig()
        // Register either MyFeature
        .register(MyFeature.class)
        // or MyResolverBinder
        .register(new MyResolverBinder())
        // Register other providers or resources
        .packages("my.package");

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