Get the root execution/processInstance for a given task

Camunda 7 Topics Discussion & Questions
1

Given only a taskId is it possible to get the “root” execution or “root” processInstance?

That means in case the task belongs to a sub process (or a call activity) - is there any change to get the overall “root” process that belongs to this task?

I did not find any way using the ProcessInstanceQuery or ExecutionQuery and their results to find “super Executions” (as it is possible for DelegateExecutions for example).

2

Hi Franz,

there is no API to get the root process instance of a task directly. But you can build this by your own, for example:

Task task = taskService.createTaskQuery().taskId(taskId).singleResult();
String processInstanceId = task.getProcessInstanceId();

ProcessInstance superProcessInstance = null;
do {
  superProcessInstance = runtimeService.createProcessInstanceQuery().subProcessInstanceId(processInstanceId).singleResult();
  if (superProcessInstance != null) {
    processInstanceId = superProcessInstance.getId();
  }
} while (superProcessInstance != null);

String rootProcessInstanceId = processInstanceId;

Does this help you?

Best regards,
Philipp

2 Likes
3

Hi Philipp,

thanks. That is what I was looking for.

Kind regards and good luck in 2017
Franz

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