为什么 Wildfly 说在部署时我的 REST 资源文件用 @RequestScoped 注释，但事实并非如此？

Question

我有一个由 Resteasy 实现的 REST 服务。在服务中，我（通过 Guice）注入了一个应用程序（实现业务逻辑并且也注入了 EJB），其中注入了 @EJB。当我部署它时，Wildfly 10 在底部给我异常。

只是搜索错误消息，我发现我的 CDI（焊接？）配置可能有误。

 [org.jboss.weld.Bootstrap] (Weld Thread Pool -- 9) WELD-000167: Class digitallibrary.masterdata.dataservice.rest.api.resources.CurrencyResource is annotated with @RequestScoped but it does not declare an appropriate constructor therefore is not registered as a bean!

我有几个问题，因为我是这个领域的新手，我需要一些前进的方向，因为我不知道我是否没有读过一些东西来启动这个应用程序运行我遇到了一个奇怪的案例

Weld 是如何出现在@EJB 周围的？我知道我的会话 bean 以某种方式被注入，但我感觉它不需要任何配置就可以发生。
为什么 Weld 认为我的 CurrencyResource class 被注释了？不是。
总是需要配置吗？我已经检查了 Github 上的 Wildfly 示例项目，但我还没有看到配置。
我必须使用 beans.xml 吗？
有没有可能是嵌套注入导致的这个问题？
您需要我项目中的任何其他代码示例吗？

请在下面找到我的申请代码：

Resteasy 资源class:

@Path("/currency")
public class CurrencyResource {

    private final CurrencyAppInterface currencyApp;

    @com.google.inject.Inject
    public CurrencyResource(final CurrencyAppInterface currencyApp) {
        this.currencyApp = currencyApp;
    }

    @GET
    @Path("/currencies")
    @Produces(MediaType.APPLICATION_JSON)
    public Response getCurrencies() {
        System.out.println("stuff");
        Collection<String> currencies = new ArrayList<String>();
        currencies.add("curr1");
        currencies.add("curr2");

        return Response
                .status(Response.Status.OK)
                .entity(currencies)
                .build();
    }
}

Resteasy 应用文件：

@ApplicationPath("/api")
public class DigitalLibraryMasterDataDataservice extends Application {

    private Set<Object> singletons = new HashSet<Object>();

    public DigitalLibraryMasterDataDataservice(@Context ServletContext servletContext) {
    }

    @Override
    public Set<Object> getSingletons(){
        Injector injector = Guice.createInjector(new CurrencyModule());

        CurrencyModule currencyModule = injector.getInstance(CurrencyModule.class);

        singletons.add(currencyModule);

        return singletons;
    }
}

应用程序文件，实现业务逻辑并使用会话 bean。

public class CurrencyApplication implements CurrencyAppInterface {

    @EJB(name = "CurrencySessionBean")
    private CurrencySessionBean currencySessionBean;

    private CurrencyMapperInterface currencyMapper;

    @com.google.inject.Inject
    public CurrencyApplication(CurrencyMapper currencyMapper) {
        this.currencyMapper = currencyMapper;
    }

    @Override
    public Collection<CurrencyDto> getAllCurrencies() throws DigitalLibraryMasterDataDataserviceApplicationException {

        try {

            Collection<Currency> currencies = this.currencySessionBean.getAllCurrencies();
            Collection<CurrencyDto> mappedCurrencies = this.currencyMapper.MapCurrenciesToCurrencyDtos(currencies);
            return mappedCurrencies;

        } catch (Exception e) {

            throw new DigitalLibraryMasterDataDataserviceApplicationException("Error in application", e);

        }
    }
}

会话 Bean：

@Stateless
public class CurrencySessionBean implements CurrencySessionBeanLocalInterface {

    @PersistenceContext(name = "DigitalLibrary.MasterData.Dataservice.PU")
    private EntityManager em;

    @Override
    public Collection<Currency> getAllCurrencies() throws DigitalLibraryMasterDataDataserviceEjbSessionBeanException {

        try {

            List<Currency> currencies = this.em.createQuery("from Currency", Currency.class).getResultList();
            return currencies;
        } catch (Exception e) {

            throw new DigitalLibraryMasterDataDataserviceEjbSessionBeanException("Error querying currencies", e);
        }
    }
}

来自 Wildfly 的完整错误消息：

22:56:25,818 INFO  [org.hibernate.envers.boot.internal.EnversServiceImpl] (ServerService Thread Pool -- 69) Envers integration enabled? : true
22:56:26,117 WARN  [org.jboss.weld.Bootstrap] (Weld Thread Pool -- 9) WELD-000167: Class digitallibrary.masterdata.dataservice.rest.api.resources.CurrencyResource is annotated with @RequestScoped but it does not declare an appropriate constructor therefore is not registered as a bean!
22:56:26,275 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-5) MSC000001: Failed to start service jboss.deployment.unit."DigitalLibrary.MasterData.Dataservice.ear".WeldStartService: org.jboss.msc.service.StartException in service jboss.deployment.unit."DigitalLibrary.MasterData.Dataservice.ear".WeldStartService: Failed to start service
        at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1904)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:748)
Caused by: org.jboss.weld.exceptions.DeploymentException: WELD-001408: Unsatisfied dependencies for type Injector with qualifiers @Default
  at injection point [BackedAnnotatedField] @Inject private org.jboss.resteasy.plugins.guice.GuiceResteasyBootstrapServletContextListener.parentInjector
  at org.jboss.resteasy.plugins.guice.GuiceResteasyBootstrapServletContextListener.parentInjector(GuiceResteasyBootstrapServletContextListener.java:0)

        at org.jboss.weld.bootstrap.Validator.validateInjectionPointForDeploymentProblems(Validator.java:359)
        at org.jboss.weld.bootstrap.Validator.validateInjectionPoint(Validator.java:281)
        at org.jboss.weld.bootstrap.Validator.validateGeneralBean(Validator.java:134)
        at org.jboss.weld.bootstrap.Validator.validateRIBean(Validator.java:155)
        at org.jboss.weld.bootstrap.Validator.validateBean(Validator.java:518)
        at org.jboss.weld.bootstrap.ConcurrentValidator.doWork(ConcurrentValidator.java:68)
        at org.jboss.weld.bootstrap.ConcurrentValidator.doWork(ConcurrentValidator.java:66)
        at org.jboss.weld.executor.IterativeWorkerTaskFactory.call(IterativeWorkerTaskFactory.java:63)
        at org.jboss.weld.executor.IterativeWorkerTaskFactory.call(IterativeWorkerTaskFactory.java:56)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:748)
        at org.jboss.threads.JBossThread.run(JBossThread.java:320)

22:56:26,279 ERROR [org.jboss.as.controller.management-operation] (DeploymentScanner-threads - 1) WFLYCTL0013: Operation ("deploy") failed - address: ([("deployment" => "DigitalLibrary.MasterData.Dataservice.ear")]) - failure description: {
    "WFLYCTL0080: Failed services" => {"jboss.deployment.unit.\"DigitalLibrary.MasterData.Dataservice.ear\".WeldStartService" => "org.jboss.msc.service.StartException in service jboss.deployment.unit.\"DigitalLibrary.MasterData.Dataservice.ear\".WeldStartService: Failed to start service
    Caused by: org.jboss.weld.exceptions.DeploymentException: WELD-001408: Unsatisfied dependencies for type Injector with qualifiers @Default
  at injection point [BackedAnnotatedField] @Inject private org.jboss.resteasy.plugins.guice.GuiceResteasyBootstrapServletContextListener.parentInjector
  at org.jboss.resteasy.plugins.guice.GuiceResteasyBootstrapServletContextListener.parentInjector(GuiceResteasyBootstrapServletContextListener.java:0) "}, "WFLYCTL0412: Required services that are not installed:" =>["jboss.deployment.unit.\"DigitalLibrary.MasterData.Dataservice.ear\".WeldStartService"], "WFLYCTL0180: Services with missing/unavailable dependencies" => undefined }

Answer 1

首先，你的构造函数用

注释

@com.google.inject.Inject

那绝对不是right.The Inject注解来自javax.inject包

其次，您的 bean 必须有一个不带参数的构造函数。如果您希望通过构造函数 @Inject 某些东西，它必须是 CDI 知道的 bean。

你可以试试：

正在从 CurrencyResource 构造函数中删除参数。
修复@Inject 注释（javax.inject 包）

Answer 2

根据标题回答你的问题：默认情况下在 WildFly 中（如果启用了 CDI 和 JAX-RS），任何 JAX-RS 资源都由 CDI 扩展分析，如果它没有注释范围注解，@RequestScoped 自动添加。

还支持 构造函数注入 JAX-RS 资源是可选的，即规范不需要。而且我不确定 RESTEasy 是否支持这个...我认为它不支持。

Answer 3

这只是对之前答案的补充。

当您将构造函数更改为不带参数时，您还可以将注入移动到 init 方法而不是按字段注入。我们公司就是这样做的，我们也使用带标准 CDI 的 Wildfly 10。

喜欢这样的：

public CurrencyResource(){
}

@Javax.inject.Inject
public void init(final CurrencyAppInterface currencyApp){
  this.currencyApp = currencyApp;
}

Answer 4

感谢大家的回答！

我的代码有很多问题：

并非所有实现某些业务逻辑的代码都由@EJB 注释
我想通过 Guice 注入，不知何故导入混合了
有一个@EJB 注入，我在其中引用了 class 而不是接口

我是如何解决这个问题的：

我用业务逻辑重构了classes，全部都是stateless session bean
它们可以很容易地包含在 CDI 中，不再需要 Guice
我也解决了引用问题

效果不佳。

为什么 Wildfly 说在部署时我的 REST 资源文件用 @RequestScoped 注释，但事实并非如此？

Why Wildfly says that at deploy my REST resource file is annotated with @RequestScoped, however it is not?

java

dependency-injection

guice

jboss-weld