Hi Jaco,
That should work. If this approach does not work, you can have a global variable at the process level and update them at every step and you can access directly activiti_ru_variable . It also depends on if your process is synchronous/asynchronous and make sure the Rest call gets the right process id before it moves to the next step.
In one of my use cases I use global variable to maintain the status of every task .That should definitely work .
