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From "Leonardo Uribe (JIRA)" <...@myfaces.apache.org>
Subject [jira] [Commented] (MYFACES-4045) Review Faces Flow reentrant condition
Date Fri, 13 May 2016 18:09:13 GMT

    [ https://issues.apache.org/jira/browse/MYFACES-4045?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15282931#comment-15282931
] 

Leonardo Uribe commented on MYFACES-4045:
-----------------------------------------

I can also confirm that the current flowScope implementations does not support to have more
than one flowScope of the same flow at the same time. So, in the hypothetical case, when the
user exit from A and B, the first flow A does not contain any previous values. 

> Review Faces Flow reentrant condition
> -------------------------------------
>
>                 Key: MYFACES-4045
>                 URL: https://issues.apache.org/jira/browse/MYFACES-4045
>             Project: MyFaces Core
>          Issue Type: Task
>          Components: JSR-344
>            Reporter: Leonardo Uribe
>            Assignee: Leonardo Uribe
>
> Checking some documentation of JSF 2.3, I noticed the following text:
> "... Because Flow instances are immutable, yet the flow stack is per-user, implementations
must make allowance for flow scoped data (managed beans declared to be FlowScoped and data
stored in the Map returned by getCurrentFlowScope()) to be fully re-entrant. For example,
consider an application with two flows, A and B, each with a single FlowScoped bean MyBeanA
and MyBeanB, respectively. Entry into flow A causes MyBeanA to become active. Calling from
A into B causes MyBeanB to become active. Calling back into A causes a new instance of MyBeanA
to become active, rather than reactivating the earlier instance of MyBeanA. ..."
> I remember this condition was discussed at some point in time, but I'm not sure if the
current implementation supports that scenario, so it is better to take a look at the code.



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