为什么 CDI 注入在某些模块中不起作用，而在其他模块中不起作用？

发布于 2024-11-26 22:19:23 字数 983 浏览 0 评论 0原文

在我的 Java EE 项目中，有几个“Java EE”模块和一个 Web 模块。其中一个 Java EE 模块向 CDI 提供了一个可供其他模块使用的类：

@ApplicationScoped
public class XFactory {

  @Produces @Actual
  public X create() {
     return new X();
  }
}

它们被注入到

   @SessionScoped
   public class Target implements Serializable {
       X x;

      @Inject
      public void setX(@Actual X x){
        this.x = x;
      }
   }

但是，这只适用于其中一个 Java EE 模块和 Web 模块。在所有剩余的 Java EE 模块中，注入始终失败，我不知道为什么：我得到的只是WELD-1408，不满足的依赖关系。

所有模块在适当的位置都有 beans.xml ，只要我不切换到注入，它们都可以工作。大多数目标 Bean 已在 JSF 中用作注入 Bean。 Java EE 模块的特殊之处在于，bean 被注入到 Web 模块中的 servlet 中，而不是 JSF 中。

该项目在 GlassFish 3.1 中使用 Java EE 6、EJB 3.1 运行。依赖关系由 Maven 3 管理。X 本身是Serialized，以满足钝化范围。

您以前遇到过这个吗？我可能做错了什么？

更新：上面添加了依赖管理备注。

更新：更正了Target中@Actual的位置。

更新：经过一天的实验后，用更多细节更新了描述。

原文

In my Java EE project, there are several "Java EE" modules and a web module.
One of the Java EE modules provides a class to CDI that is to be used by the other modules:

@ApplicationScoped
public class XFactory {

  @Produces @Actual
  public X create() {
     return new X();
  }
}

They are injected into

   @SessionScoped
   public class Target implements Serializable {
       X x;

      @Inject
      public void setX(@Actual X x){
        this.x = x;
      }
   }

However, this works only in one of the Java EE modules and in the web module. In all of the remaining Java EE modules, injection consistently fails, and I am clueless as to why: All I get is WELD-1408, unsatisfied dependency.

All of the modules have beans.xml in the proper places, they all work as long as I don't switch to injection. Most of the target beans are already in use as injected beans in a JSF.
What's special about the Java EE module that works is that the bean is injected into a servlet in the web module, not the JSF.

The project runs with Java EE 6, EJB 3.1 in GlassFish 3.1. Dependencies are managed by Maven 3. X itself is Serializable, to satisfy the passivating scopes.

Did you come across this before? What could I have done wrong?

Update: Added dependency management remark above.

Update: Corrected the position of @Actual in Target.

Update: Updated the description with more details after a day of experiments.

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