如何在运行grizzly的java se上启用web服务(jaxrs/jersey)中的CDI注入？

Question

如何允许CDI将资源注入到宁静的Web服务资源中？我使用焊接2(cdi),泽西(jaxrs)和灰熊(网络服务器)在标准java上运行.这是我简单的网络资源:

import training.student.StudentRepository;
import javax.inject.Inject;
import javax.ws.rs.*;

@Path("student")
public class StudentWebResource {
  @Inject
  private StudentRepository studentRepository;  

  @GET
  @Path("count")
  @Produces(MediaType.TEXT_PLAIN)
  public Integer getCount() {
    return studentRepository.studentCount();
  }
}

这是我如何焊接启动我的简单Web服务器:

public class Main {
  public static void main(String[] args) throws Exception {
    startCdiApplication();
  }

  public static void startCdiApplication() throws Exception {
    Weld weld = new Weld();
    try {
      WeldContainer container = weld.initialize();
      Application application = container.instance().select(WebServer.class).get();
      application.run();
    } 
    finally {
      weld.shutdown();
    }
  }
}

我怀疑的代码需要修改,以通知球衣使用焊接CDI注入分辨率:

...
import org.glassfish.grizzly.http.server.HttpServer;
import org.glassfish.jersey.grizzly2.httpserver.GrizzlyHttpServerFactory;
import org.glassfish.jersey.jackson.JacksonFeature;
import org.glassfish.jersey.server.ResourceConfig;

public class WebServer implements Application {

  /*
   * startup the grizzly http server to make available the restful web services
   */
  private void startWebServer() throws IOException, InterruptedException {
    final ResourceConfig resourceConfig = new ResourceConfig().packages("training.webservice").register(new JacksonFeature());
    final HttpServer server = GrizzlyHttpServerFactory.createHttpServer(getBaseUri(), resourceConfig);
    server.start();
    Thread.currentThread().join();
  }

  ...

  @Override
  public void run() throws IOException, InterruptedException {
    startWebServer();
  }
}

Answer 1

看到这个stackoverflow帖子后,我实现了以下解决方案.不确定它是否是最好的路线,但它确实有效.

我创建了一个hk2 Binder并注册了Binder:

public class WebServiceBinder extends AbstractBinder {

  @Override
  protected void configure() {
    BeanManager bm = getBeanManager();
    bind(getBean(bm, StudentRepository.class))
        .to(StudentRepository.class);
  }

  private BeanManager getBeanManager() {
    // is there a better way to get the bean manager?
    return new Weld().getBeanManager();
  }

  private <T> T getBean(BeanManager bm, Class<T> clazz) {
    Bean<T> bean = (Bean<T>) bm.getBeans(clazz).iterator().next();
    CreationalContext<T> ctx = bm.createCreationalContext(bean);
    return (T) bm.getReference(bean, clazz, ctx); 
  }
}

然后将ResourceConfig实例化从上面修改为:

final ResourceConfig resourceConfig = new ResourceConfig()
    .packages("training.webservice")
    .register(new JacksonFeature())
    .register(new WebServiceBinder());

Answer 2

选定的答案可以追溯到前一段时间.在自定义HK2活页夹中声明每个绑定是不切实际的.我只需要添加一个依赖项.尽管它是专为Glassfish设计的,但它完全适合其他容器.我正在使用Tomcat/Grizzly.

   <dependency>
        <groupId>org.glassfish.jersey.containers.glassfish</groupId>
        <artifactId>jersey-gf-cdi</artifactId>
        <version>2.14</version>
    </dependency>

以下是JerseyTest的示例(如果您从main方法运行它,则相同的原则).我只需声明对weld-se的依赖并在实例化我的资源之前声明一个Weld容器 - 正如你所做的那样 - 并且它开箱即用.

public class GrizzlyTest extends JerseyTest {
    private Weld weld;
    private WeldContainer container;

    @Override
    protected Application configure() {
        weld = new Weld();
        container = weld.initialize();
        return new ResourceConfig(MyResource.class);
    }

    @Test
    public void test() {
        System.out.println(target("myresource").request().get(String.class));
    }

    @After
    public void after() {
        weld.shutdown();
    }
}