从会话中删除bean [英] Removing beans from session

问题描述

我有一些 @SessionScoped CDI bean。以前所有这些都是JSF管理的bean（从JSF管理的Bean更改为CDI管理的Bean）。

I have some @SessionScoped CDI beans. Previously all of them were JSF managed beans (changed from JSF managed beans to CDI managed beans).

我正在执行以下操作，以删除一些在用户成功下达了在线订单。

I was doing like the following to remove some session scoped JSF managed after a user successfully places an online order.

Map<String, Object> sessionMap = context.getSessionMap();

sessionMap.remove("cartBean");
sessionMap.remove("orderItems");
sessionMap.remove("reviewOrderBean");
sessionMap.remove("intermediateLocaleBean");
sessionMap.remove("localeBean");
sessionMap.remove("currencyRateBean");
sessionMap.remove("currency");

因此，在订单处理完成后，所有内容均设置为默认值。这与销毁/无效整个HTTP会话无关，在该HTTP会话中，在成功终止订单处理后不能注销用户。

So that everything is set to default after order processing completes. This is irrelevant to destroying/invalidating the entire HTTP session where the user must not be logged out after order processing terminates successfully.

与JSF管理的bean不同，CDI bean通过某些CDI管理器实现（如Weld）存储在服务器的内存中。因此，它们在会话映射中不可用- Map< String，Object> 。

Unlike JSF managed beans, CDI beans are stored into server's memory by some CDI manager implementation like Weld. Therefore, they are not available in a session map - Map<String, Object>.

这怎么可能还是模拟了CDI Bean？

How can this be simulated anyway regarding CDI beans?

UPDATE：

The焊接文档：

请记住，一旦将bean绑定到上下文，它将保留在
中直到上下文被破坏为止。 无法通过
从上下文中手动删除bean。如果您不希望将
的bean无限期地放置在会话中，请考虑将另一个作用域与$一起使用b $ b缩短了寿命，例如请求或对话范围。

Keep in mind that once a bean is bound to a context, it remains in that context until the context is destroyed. There is no way to manually remove a bean from a context. If you don't want the bean to sit in the session indefinitely, consider using another scope with a shorted lifespan, such as the request or conversation scope.

因此，我想，如果不使用手工销毁一个bean很难

So I assume, it is hard to manually destroy a bean without destroying something else.

推荐答案

CDI 1.1引入了 AlterableContext 接口， destroy（Bean< T>）方法。

CDI 1.1 introduced an AlterableContext interface with a destroy(Bean<T>) method.

通过 beanManager.getContext（SessionScoped.class）获取会话上下文，向下转换为 AlterableContext ，然后使用适当的bean类型调用 destroy（）。

Get the session context via beanManager.getContext(SessionScoped.class), downcast to AlterableContext and then invoke destroy() with the appropriate bean type.

这篇关于从会话中删除bean的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！