Listing all tasks from a bpmnModel, including those from a called activity

[hiravgandhi]

Currently, I am retrieving a bpmnModel from runtimeService and using code from ProcessDiagramGenerator to get a list of all tasks in a process. However, I would like to be able to retrieve the tasks from the subprocesses called from CallActivities. How would I go about doing that?

[jbarrez]

You should use the BpmnModel you can get from the RepositoryService. That allows you to inspect the whole process definition using java pojo's.

[hiravgandhi]

Thank you Joram. I made a typo in my original question - I am using RepositoryService but I am a little confused as to how to go about doing printing out that list of tasks. The documentation on BpmnModel doesn't seem to be the greatest.

[frederikherema1]

Use getFlowElements() on the Process (fetched from the BPMNModel). If it's a UserTask, print it. If it's a CallActivity, use the "calledElement" property to get hold of the key of the referenced definition. With this key, fetch the ID of the latest definition and fetch it's BPMNModel -  and do the same handling as you did with the BPMNModel you're currently looping (recursively).

Do bare in mind that it's possible to use expressions in the calledElement value of a CallActivity XML. Make sure you only use process-definitions with a fixed pointer to a process definition key in order for the mechanism described above, to work.