为什么可以将@Stateless EJB注入@SessionScoped Managed Bean？
[英]Why is it possible to @Inject a @Stateless EJB into a @SessionScoped Managed Bean?
问题描述
Why is it possible to @Inject a @Stateless EJB into a @SessionScoped Managed Bean? 
为什么有可能@Inject一个@Stateless EJB成@SessionScoped Managed Bean的？
I am just very curious because it is not possible to use a @RequestScoped Managed Bean in a SessionScoped Managed Bean as managed property. 我只是很好奇，因为不可能在SessionScoped Managed Bean中使用@RequestScoped Managed Bean作为托管属性。
1 个解决方案
解决方案1
7 已采纳 2012-07-02 18:31:45
Why is it possible to @Inject a @Stateless EJB into a @SessionScoped Managed Bean?
That makes perfect sense. 这很有道理。 You might want to access a stateless component (eg a validation service) from within a stateful service (eg a shopping process). 您可能希望从有状态服务（例如购物流程）中访问无状态组件（例如验证服务）。 CDI references are proxied , so there is no technical problem with the resolution. CDI引用是代理的 ，因此解决方案没有技术问题。
I am just very curious because it is not possible to use a @RequestScoped Managed Bean in a SessionScoped Managed Bean as managed property.
You are referring to the JSF scopes, not the CDI scopes, right? 您指的是JSF范围，而不是CDI范围，对吧？ I cannot tell why that constellation might be forbidden, but both specifications are completely unrelated, so there is no " if A is true in JSF then B must be true in CDI "-relationship... 我不知道为什么这个星座可能是被禁止的，但两个规范都是完全不相关的，所以没有“ 如果A在JSF中是真的那么B必须在CDI中是真的 ” - 关系......
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