Store user preferences accessible from view layer and ADF BC

Hi
I'm working with JDeveloper 11.1.2.1
We have an application with an application-level shared application module which contains VOs with bind variables to generate language dependent LOVs. From these VOs have to access the language.
We want to store user language and other user preferences in the future and these can be accessed by the view layer and ADF BC.
In addition, we want that application will be passivation safe and works properly in a cluster environment.
At first we opted to save the language in the HTTP session, but we access it from ADF BC ... and we would not want to break the MVC pattern. This article
Andrejus Baranovskis's Blog: Bad Practice for Session Scope Access in ADF BC
says that the MVC pattern only breaks when our application module can not be executed without the UI. We differentiate when run individually and when run as a logged in user to avoid this rupture. ¿Is this acceptable solution?
Otherwise, what is the best option to preserve the MVC pattern and also the passivation does not affect the proper execution of the application and not cause problems in the cluster (HTTP sessions are replicated, but the rest?)
I have seen that there are 2 more possible methods :
- Transient View Object
- User data map
The user data map discussed in this article seems an option,
Andrejus Baranovskis's Blog: Solution for Sharing Global User Data in ADF BC
but perhaps complicates the development and I don't know if shared application module would work properly. For example, we need the language of the user in the application-level shared application module VOs, but the user data map is available only in the session of the root application module no? If we have a method that gets the language within the shared application module, ¿when the method getSession.getUserData() execute, it will access the user data in the root application module or return null?
If you could tell us if we are correct using the HTTP session or else it is better that we use the user data map, it would be a great help.
Thanks

Hi,
this sounds like something that belongs in your Application Module. I would create a client method which would do your LDAP checks before calling your view object to create a new row. Have the client method return the result based on the success of your LDAP search.
Call this AM client method from the backing bean of the JSP and return a page flow based on the outcome of your client method.
The actual transaction with the database happens in your doDML method of the Entity Object (override the doDML method). But I would still implement this business logic in the AM.
regards,
Brenden

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