Sharing transaction between regions and creating new records

Question

Hi all,
To simplify my scenario, I will use HR scema.
I have a fragment department.jsff. This one is showing records from a Departments table in a panelFormLayout. In here I have a button NEW that is bound to the CreateInsert operation from Deparment collection from HRDataControl. (so the ActionListener for the button is "#{bindings.CreateInsert.execute}".
This department.jsff has a task flow as a region (customer-tf) with input parameter. So in departmentPageDef, customer-tf is an executable with Refresh:ifNeeded and a parameter value: #{bindings.DepartmentId.inputValue}. The customer-tf, has as a default activity method call - which based on the input parameter value executes a query (viewcritwria) for Customer table, and than shows in a table Customer collection from HRDataControl.
So far so good. When I run the page, first record from Departnent collection is displayed in the form, the right value #{bindings.DepartmentId.inputValue} is passed as a input value to customer-tf, proper query is done for Customer collection and proper customer records are displayed in the customer region.
The problem I have is when the New button is pressed.
If on customer-tf for Transaction behavior I set: <No Controller Transaction> and "Share data controls with calling task flow" unchecked (so isolated), than when New button is pressed, new department record is created, and customer table shows no records. The customer-tf was restarted with a input parameter value of -10 (since DepartmentId is of type oracle.jbo.domain.DBSequence in Department table.) That is excellant.
But I want to share transaction. So if on customer-tf for Transaction behavior I set: <Use existing Transaction if possible> and "Share data controls with calling task flow" checked (so shared), I am tracing that new record is created in Department entity, but customer-tf is restarted with the old value of DeparmentId #{bindings.DepartmentId.inputValue}. New record is never shown on the page.
I want to be able to share transaction and data control. Somehow is second scenario, like a sharing prevents bindings value (#{bindings.DepartmentId.inputValue}) to get new value of -10.
Am I doing anything wrong??

Answer 1

I have figured it out.
The transaction management and sharing data controls.
It is different when the task-flow:
a) is a region inside a page or fragment (in here you are controlling only sharing data controls declaratively)
b) is called with a task low call activity from another flow and has a task flow return point (in here you are controlling transaction declaratively + sharing data controls)
I figured out this by carefully rereading from Fusion Developers Guide: chapter 18.3 (Managing transactions) , and chapter 16.4 (Sharing data control instances)
Regards