无法将 ejbRef 转换为 ejb

发布于 2024-12-10 13:22:04 字数 2680 浏览 0 评论 0原文

QuestionCommonBusiness

public interface QuestionCommonBusiness {

    void create(Question question);
    void update (Question question);
    void delete(Question question);
    Question read(Integer id);

    List<Question> all();
}

QuestionLocalBusiness

public interface QuestionLocalBusiness extends QuestionCommonBusiness {

}

QuestionManagerEJB

@Stateless
@Local(QuestionLocalBusiness.class)
public class QuestionManagerEJB implements QuestionLocalBusiness {

    @PersistenceContext(unitName = "MyPU")
    private EntityManager entityManager;

    @Override
    public void create(Question question) {
        entityManager.persist(question);
    }

    @Override
    public void update(Question question) {
        entityManager.merge(question);
    }

    @Override
    public void delete(Question question) {
        entityManager.remove(question);
    }

    @Override
    public Question read(Integer id) {
        return entityManager.find(Question.class, id);
    }

    @Override
    public List<Question> all() {

        TypedQuery<Question> query = entityManager.createNamedQuery(
                "allQuestions", Question.class);
        return query.getResultList();
    }
}

QuestionController（JSF bean）...我不知道我是否正确使用了它

 @Named
    @RequestScoped
    public class QuestionController {

    @Inject
    private QuestionLocalBusiness questionManager;

    private List<Question> questions;

    @PostConstruct
    public void initialize() {
        questions = questionManager.all();
    }

    public List<Question> getQuestions() {
        return questions;
    }

}

<强>错误

HTTP 状态 500 -

类型异常报告

信息

描述服务器遇到内部错误（），导致其无法完成此请求。

例外

javax.servlet.ServletException：WELD-000049无法调用[方法] @PostConstruct public

com.myapp.interfaces.QuestionController.initialize() 上 com.myapp.interfaces.QuestionController@29421836

根本原因

org.jboss.weld.exceptions.WeldException: WELD-000049 无法调用 [方法] @PostConstruct public

com.myapp.interfaces.QuestionController.initialize() 上 com.myapp.interfaces.QuestionController@29421836

根本原因

java.lang.reflect.InitationTargetException

根本原因

java.lang.IllegalStateException：无法将 ejb QuestionManagerEJB 的 ejbRef 转换为接口类型的业务对象

com.myapp.application.QuestionCommonBusiness

note GlassFish Server 开源版 3.1.1 日志中提供了异常的完整堆栈跟踪及其根本原因。

原文

QuestionCommonBusiness

public interface QuestionCommonBusiness {

    void create(Question question);
    void update (Question question);
    void delete(Question question);
    Question read(Integer id);

    List<Question> all();
}

QuestionLocalBusiness

public interface QuestionLocalBusiness extends QuestionCommonBusiness {

}

QuestionManagerEJB

@Stateless
@Local(QuestionLocalBusiness.class)
public class QuestionManagerEJB implements QuestionLocalBusiness {

    @PersistenceContext(unitName = "MyPU")
    private EntityManager entityManager;

    @Override
    public void create(Question question) {
        entityManager.persist(question);
    }

    @Override
    public void update(Question question) {
        entityManager.merge(question);
    }

    @Override
    public void delete(Question question) {
        entityManager.remove(question);
    }

    @Override
    public Question read(Integer id) {
        return entityManager.find(Question.class, id);
    }

    @Override
    public List<Question> all() {

        TypedQuery<Question> query = entityManager.createNamedQuery(
                "allQuestions", Question.class);
        return query.getResultList();
    }
}

QuestionController (JSF bean)...I don't know if I use this correctly

 @Named
    @RequestScoped
    public class QuestionController {

    @Inject
    private QuestionLocalBusiness questionManager;

    private List<Question> questions;

    @PostConstruct
    public void initialize() {
        questions = questionManager.all();
    }

    public List<Question> getQuestions() {
        return questions;
    }

}

Error

HTTP Status 500 -

type Exception report

message

descriptionThe server encountered an internal error () that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: WELD-000049 Unable to invoke [method] @PostConstruct public

com.myapp.interfaces.QuestionController.initialize() on
com.myapp.interfaces.QuestionController@29421836

root cause

org.jboss.weld.exceptions.WeldException: WELD-000049 Unable to invoke [method] @PostConstruct public

com.myapp.interfaces.QuestionController.initialize() on
com.myapp.interfaces.QuestionController@29421836

root cause

java.lang.reflect.InvocationTargetException

root cause

java.lang.IllegalStateException: Unable to convert ejbRef for ejb QuestionManagerEJB to a business object of type interface

com.myapp.application.QuestionCommonBusiness

note The full stack traces of the exception and its root causes are available in the GlassFish Server Open Source Edition 3.1.1 logs.

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从此见与不见 2024-12-17 13:22:04

此问题与 Glassfish Weld 问题 16186 相关。 @Local 选择了错误的接口，即最上层接口。

您有 2 个选择：

只需使用 @EJB 即可。
摆脱 QuestionCommonBusiness 超级接口。

不用说，选项 1 是首选。

回复收藏 0 原文

三生一梦 2024-12-17 13:22:04

或者您可以在 @Local 注释中包含 QuestionCommonBusiness.class：

   @Stateless
   @Local({QuestionLocalBusiness.class, QuestionCommonBusiness.class)
   public class QuestionManagerEJB implements QuestionLocalBusiness {
      ...

Or you may include QuestionCommonBusiness.class in your @Local annotation:

   @Stateless
   @Local({QuestionLocalBusiness.class, QuestionCommonBusiness.class)
   public class QuestionManagerEJB implements QuestionLocalBusiness {
      ...

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