java - 无法将 @Stateless EJB 注入(inject) CDI bean(多模块)Jakarta EE 8

Question

将遗留项目迁移到 Jakarta EE 8(Maven EAR 在 Wildly 26 上构建)

-WebApp.ear
    -WebApp-entities.jar
    -WebApp-ejb.jar
    -WebApp-web.war
    -WebApp-mobile.war
    -WebApp-api.war

该结构是基于 wildfly-jakartaee8-with-tools 原型(prototype)创建的

我要注入(inject)的 DAO 是一个使用 @LocalBean 无接口(interface)的 @Stateless bean，例如。

@Named
@LocalBean
@Stateless
@TransactionAttribute(TransactionAttributeType.REQUIRED)
public class UserDAO extends GenericDAOBean<User,Long> {

    @PersistenceContext(unitName="ReadOnlyDatabase")  private EntityManager readOnlyEntityManager;
    
    /**
     * Default constructor
     */
    public UserDAO() {
        //Super call to construct AbstractDAO
        super();
    }
    
    public User findNonDeletedByEmail(String email){
        String s = "from User where email = :email and disabled = false";
        Query query = this.getEntityManager().createQuery(s);
        query.setParameter("email", email);
        try{
            return (User)query.getSingleResult();
        }catch(NoResultException nre){
            return null;
        }catch(Exception e){
            return null;
        }
    }
    
}

我的 CDI bean 是 WAR 模块中的标准 @RequestScoped bean，它试图注入(inject) DAO 以执行登录

@Named
@RequestScoped
public class LoginBean implements Serializable {


private static final long serialVersionUID = 1504441323094295359L;

@Inject private SecurityContext securityContext;
@Inject private UserDAO userDAO;
@Inject private FacesContext facesContext;
@Inject private ExternalContext externalContext;

private String username, password;

public void login() throws IOException {
  
    Credential credential = new UsernamePasswordCredential(username, new Password(password));
  
    User user = userDAO.findByEmailForUserLogin(username);
   AuthenticationStatus status = securityContext.authenticate(
           getRequest(facesContext),
           getResponse(facesContext),
           AuthenticationParameters.withParams()
                   .credential(credential));
  
   switch (status) {
       case SEND_CONTINUE:
           facesContext.responseComplete();
           break;
       case SEND_FAILURE:
           facesContext.addMessage(null,
                   new FacesMessage(FacesMessage.SEVERITY_ERROR, "Login failed", null));
           break;
       case SUCCESS:
           facesContext.addMessage(null,
                   new FacesMessage(FacesMessage.SEVERITY_INFO, "Login succeed", null));
           externalContext.redirect(externalContext.getRequestContextPath() + "/user/home.xhtml");
           break;
       case NOT_DONE:
   }
  
}

private static HttpServletResponse getResponse(FacesContext context) {
   return (HttpServletResponse) context
       .getExternalContext()
       .getResponse();
}

private static HttpServletRequest getRequest(FacesContext context) {
   return (HttpServletRequest) context
       .getExternalContext()
       .getRequest();
}

public String getUsername() {
    return username;
}

public void setUsername(String username) {
    this.username = username;
}

public String getPassword() {
    return password;
}

public void setPassword(String password) {
    this.password = password;
}

当我从 JSF 页面调用 login() 方法时，出现以下错误:

Target Unreachable, identifier 'loginBean' resolved to null: javax.el.PropertyNotFoundException

如果我注释掉 userDAO 注入(inject)，方法调用正常，所以我知道是 UserDAO 导致了问题，没有其他错误

在服务器启动日志中，我可以看到 UserDAO 已成功注册，例如:

    java:global/WebApp/Web-entities/UserDAO!com.webapp.dao.beans.UserDAO
java:app/Web-entities/UserDAO!com.webapp.dao.beans.UserDAO
java:module/UserDAO!com.webapp.dao.beans.UserDAO
java:global/WebApp/Web-entities/UserDAO
java:app/Web-entities/UserDAO
java:module/UserDAO

我在/web-inf/beans.xml (war) 和/meta-inf/beans.xml (jar) 中定义了 beans.xml，它们都是 bean-discovery-mode="annotated"

我的 EJB 模块作为 Maven 依赖包含在 WAR .pom 中，带有 <scope>provided</scope>

我也试过用@EJB注入(inject)也有同样的错误

更新:

我发现通过设置 <ear-subdeployments-isolated>false</ear-subdeployments-isolated>在 boss-deployment-structure.xml 中允许注入(inject)工作，但是这会产生跨模块重复依赖和类路径错误的问题，所以我认为它不是正确的解决方案(我们的遗留 EE 6 项目隔离了 EAR 部署，并且DI 工作正常)

Answer 1

最终通过向 jboss-deployment-structure.xml 中的 EJB 和 Entity 模块添加模块依赖关系来实现这一点，如下所示...

<sub-deployment name="WebApp-web.war">
    <dependencies>
        <module name="deployment.WebApp.ear.WebApp-entities.jar" />
        <module name="deployment.WebApp.ear.WebApp-ejb.jar" />
    </dependencies>
  </sub-deployment>

注入(inject) WAR 现在可以正常工作，这在旧版 EE 6/JBoss 7 应用程序中不是必需的，因此类加载行为一定已经改变