Question

在父抽象类中注入名为component的会话作用域是否存在问题？

这是设置：我有一个界面：

@Qualifier
@Retention(RetentionPolicy.RUNTIME)
@Target({ ElementType.METHOD, ElementType.FIELD, ElementType.PARAMETER, ElementType.TYPE })
public @interface CurrentTeacher { }

我用它来制作当前学生（在会话范围内）：

@Named
@SessionScoped
public class CurrentStudentBean implements Serializable {
    @Produces
    @Named("currentTeacher")
    @currentTeacher
    public Teacher getCurrentTeacher() {
        //...
        return currentTeacher;
    }
}

我按顺序注入它的相当混乱的部分。

page.xhtml-＆GT; UserBean.java

page.xhtml：

<p:commandButton action="userBean.deleteSubject()" value="delete" />

包含删除主题的操作。

@Named
@ConversationScoped
public class StudentBean.java extends BaseBean {
  @Inject
  StudentService studentService;
}

public abstract class BaseBean { 
  @Inject
  @CurrentTeacher
  private Teacher currentTeacher; //injection OK    

  public void deleteSubject() { 
    getService().deleteSubject();
    //returns studentService from UserBean and calls BaseService.deleteSubject();
  }
}

@Stateless
@LocalBean
public class StudentService extends BaseService {
}

public abstract class BaseService {
  @Inject
  @CurrentTeacher
  private Teacher currentTeacher; //injection FAILED, currentTeacher always null

  public void deleteSubject() {
    if(currentTeacher != null) { //do something }
  }

  public Student getTeacher() {
    return currentTeacher;
  }
}

父抽象类上的CDI注入失败

0 个答案: