ADF Taskflow programatic refresh

Refreshing a taskflow sometimes becomes very essential in scenarios where we have multiple pages/fragments in a task flow and the business process requires multiple taskflows and each taskflows are interconnected.

For example :

Taskflow 1 has Pagefragment1, Pageframent2, Pagefragment3 and are executed in the same sequence based on your busines scenario.

Taskflow 2 has Pagefragment3, Pageframent4, Pagefragment5

Now on completion of Taskflow 1 (i.e Pagefragment 3), we call taskflow 2 and for any reason based on business logic we have to  go back to taskflow1. Surprisingly, taskflow1 starts at Pageframent 3 and NOT at Pageframent1, even though we set the default task for Taskflow1 as Pageframent1.

In such a scenario, we need to refresh the task flow that we instead to call by getting handler to the taskflow binding and refresh the taskflow. Refresh of taskflow re-renders/re-executes the taskflow starting from the default selection in the task flow. Below is the code snippet to do the same.

DCTaskFlowBinding tf = (DCTaskFlowBinding) JSFUtils.resolveExpression("#{binding.mytaskflow}");

//Refresh taskflow

tf.getRegionModel().refreshh(FacesContext.getCurrentinstance());