java - 在没有范围注释的情况下，由 @Produces 方法创建的 bean 的默认范围是什么？

Question

我有一个带有 @Produces 的方法创建 Apple 的注释。

当我像这样与 @ApplicationScoped 一起使用时

public class AppleProducer {
    @ApplicationScoped
    @Produces
    public Apple createApple() {
        return new Apple();
    }
}

然后 Apple 只为整个应用程序创建一次。

当我像这样将它与 @RequestScoped 一起使用时

public class AppleProducer {
    @RequestScoped
    @Produces
    public Apple createApple() {
        return new Apple();
    }
}

然后为每个请求创建它。

但是如果我不指定范围怎么办？

public class AppleProducer {
    @Produces
    public Apple createApple() {
        return new Apple();
    }
}

苹果多久会被创建一次？我每次访问都怀疑，这是正确的吗？有相关文档吗？

Answer 1

这是 @Dependent 。

根据2.4.4. Default scope中的“CDI (1.2) specification” :

When no scope is explicitly declared by annotating the bean class or producer method or field the scope of a bean is defaulted.

The default scope for a bean which does not explicitly declare a scope depends upon its declared stereotypes:

• If the bean does not declare any stereotype with a declared default scope, the default scope for the bean is @Dependent.

• If all stereotypes declared by the bean that have some declared default scope have the same default scope, then that scope is the default scope for the bean.

• If there are two different stereotypes declared by the bean that declare different default scopes, then there is no default scope and the bean must explicitly declare a scope. If it does not explicitly declare a scope, the container automatically detects the problem and treats it as a definition error.

If a bean explicitly declares a scope, any default scopes declared by stereotypes are ignored.