[cdi-dev] [JBoss JIRA] (CDI-739) Scope mismatch can lead to subtle bugs

[Frigo Coder (Jira)]

     [ https://issues.jboss.org/browse/CDI-739?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Frigo Coder updated CDI-739:
----------------------------
    Steps to Reproduce: 
- Create a @RequestScoped provider
- Return a non-proxyable object from it
- @Inject the object into an @ApplicationScoped bean
- Call the bean once to initialize the object
- Call the bean subsequent times
- Watch the object stay the same and incorrect for subsequent calls


  was:
- Create a @RequestScoped provider
- Return a non-proxyable object from it
- @Inject the object into an @ApplicationScoped bean
- Call the bean once to initialize the object
- Call the bean subsequent times and watch the object stay the same




> Scope mismatch can lead to subtle bugs
> --------------------------------------
>
>                 Key: CDI-739
>                 URL: https://issues.jboss.org/browse/CDI-739
>             Project: CDI Specification Issues
>          Issue Type: Bug
>          Components: Beans, Contexts, Java EE integration
>            Reporter: Frigo Coder
>            Priority: Minor
>
> CDI allows injection of a non-proxyable object created by a provider into higher level contextes. This can lead to subtle bugs, see the following example, the first username that accesses the service is returned for other users:
> {code:java}
> @ApplicationScoped
> public class ServiceClass {
>     @Inject
>     @UserName
>     private String userName;
> }
> @RequestScoped
> public class UserNameProvider {
>     @Inject
>     private HttpServletRequest request;
>     @Produces
>     @UserName
>     public String userName() {
>         return request.getUserPrincipal().getName();
>     }
> }
> {code}
> CDI should fail to start when it detects such a situation. Do note that this bug does not require direct injection (Service->userName), it can occur transitively as well (Service->User->userName).



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