Using Save Points in Dynamic Region

Question

Using Jdeveloper 11.1.1.3.0
Based on forum: Re: "Rollback" changes from a single View Object
As well as code corner: http://www.oracle.com/technetwork/developer-tools/adf/learnmore/007-cancelform-savepoint-169126.pdf
I've understood the use case and setups in using SavePoints in handling transaction to ensure that CRUD tasks will not affect certain areas of the calling taskflow. What i'm trying to implement now, is utilizing savepoints in the case of dynamic region.
I tried creating savePoints on the initializer and restoring them on the finalizer, but what i'm getting is a nullpointer exception because upon running the page containing the dynamic region, the initializer and finalizer seems to be activated twice.
Looking for some thoughts and suggestions that i can try for this scenario.
What i'm trying to achieve is to create a menu driven dynamic region but i'd like those region to handle and cleanup on their own without affecting the calling taskflow.
Thanks.

Answer 1

Hi Frank,
I would just like to clarify what you replied.
So basically, i'll create method in my taskflow as an default entrypoint which creates a savePoint. But since i'm using a dynamic region, then a return case will never be triggered, so in the taskflow configuration there is an option under general tab called SavePointRestoreFinalizer, so i'll set here the method that restores my savePoint programmatically with the same id i set when creating one.
Now another thought that i've been thinking of, is that whether this is the best approach to take or will placing a savepoint on the taskflow that contains the fragment with the dynamic region be a better place to set savePoints?
Hope to get some clarifications on this hehe.
Thanks for the time.