Executing Child Taskflow Method from parent taskflow page

Question

Hi All,
I have one issue with checking dirty data form Parent Taskflow button to check dirty data update in Child Taskflow page's view Object.
JDev version: 11.1.1.3
Scenario :
Outer Container page has back button which need to check wherethere child taskflow has dirty data update or not. Child Taskflow transaction is always create new transaction and non-shared. But from ControllerContext, the root am service still associated with other viewobjects i.e. is loaded in others tabs in that outer container page, which is also checking dirty data from another tabs' viewobject dirty data checking (I need to avoid this issue that's why not working for me with controller context). I am thining to execute the child taskflow method from parent page on back button to check dirty data update for that tabs' page only. For it, how can we get access child taskflow method from parent page with static region taskflow. Is there any solution to implement like this? thank you so much.
- Robin

Answer 1

Hi,
this should work:
1. child task flow has input parameter "parentBean" defined.
2. The child task flow has a managed bean "ChildBean" defined in pageFlowScope with a property "parentBean" with setter/getter.
3. the parentBean input parameter references (in its value roperty) #{pageFlowScope.childBean.parentBean}
4. The parent bean is configured on the parent view task flow (viewScope) and passed as a task flow binding input parameter. The parent bean has a boolean property "childFlowTransactionDirty"
This allows the child bean to invoke the parent bean childFlowTransactionDirty to tell it that the transaction is dirty. On the parent view, you would just check the parentBean state for this property.
Next is how you set the value on the parentBean from the childTaskFlow. One option is to use a RegionController on the PageDef file of ADF bound views in the child task flow.
public class MyRegionController implements RegionController {
    public MyRegionController(){
    public boolean refreshRegion(RegionContext regionContext) {      
     int refreshFlag = regionContext.getRefreshFlag();
      //get access to the ChildBean and its parentBean property. Then call
      //ControllerContext .... to check the transaction state
      //update the childFlowTransactionDirty property
      ((DCBindingContainer)regionContext.getRegionBinding()).refresh(refreshFlag);
      return true;
    @Override
    public boolean validateRegion(RegionContext regionContext) {
        regionContext.getRegionBinding().validate();
        return false;
    public boolean isRegionViewable(RegionContext regionContext) {
        return regionContext.getRegionBinding().isViewable();
    @Override
    public String getName() {
        return this.getClass().toString();
}Next: When users press the back button in the parent view, you call the ParentView bean childFlowTransactionDirty to check the child task flow transaction to be dirty or not
Frank