Getting all Tasks by processinstanceId - including those in subprocesses

Camunda 7 Topics Discussion & Questions
1

Hello,

let’s assume that i have a given processinstance Id. Now i want to receive all tasks in that process instance, but i also want to receive the tasks in the subprocesses’ instances and in the subsubprocesses instances etc… In fact that i don’t know the number of nested subprocesses - how can i get all of these tasks? What would be an elegant solution, to archieve this? Something like:

public Task getAllTasks(String processInstanceId){
...
}

Many thanks in advance!

Best regards
Andy

2

Hey Andy,

you could use the businessKey to archive this.

Greets Chris

3

Hi Chris,

thank you for your quick reply. Can you specify, what you are meaning? I have never worked with business keys. I know, that the business key is a unique identifier like processinstanceId, but more meaningful for business purposes. Do you mean, that i have to give a business key when i’am starting a parent process instance? And when the engine is calling a subprocess it will forward the parent instance’s businessKey through the child processinstance?

And then i have just to query for tasks with the specified business key. Is that right?

Thank you :slight_smile:
Greets Andy

4

Hey Andy,

Do you mean, that i have to give a business key when i’am starting a parent process instance? And when the engine is calling a subprocess it will forward the parent instance’s businessKey through the child processinstance?

Exactly this is what I meant. I think we can improve the documentation about that topic.

Greets
Chris

5