Finding relationship between processes

[Nicholas McRae]

Have been doing some thorough searching to find out how I can obtain parent/child processes of specific process instances. What I'm trying to do is send a notification e-mail with Java code when multiple sub-processes come together on the same gateway.

I'm working on the the following assumption:

- the remote API can't query for parent/child processes directly

Is this correct?

I've since looked into creating an event listener, but the issue is, while I can see when a sub-process has started and get its instance id, I need to map it to it's master process, and further a 'project' associated with the master process so I can e-mail the appropriate people. That brings me back to my original problem of not being able to get parent/children.

Does that make sense? Can you confirm my assumption? Are there any other avenues I can take?

[Kris Verlaenen]

Depends on which version you use.  With 6.2.0.Final, the information is already available in the ProcessinstanceLog.parentProcessInstanceId, and you can get it from REST, for example:
http://localhost:8080/jbpm-console/rest/history/instance/34

<process-instance-log>
  <process-instance-id>34</process-instance-id>
  <process-id>CallProcess.ChildProcess</process-id>
  <start>2015-03-27T23:36:24.864+01:00</start>
  <status>1</status>
  <parent-process-instance-id>33</parent-process-instance-id>
  <outcome xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:nil="true"/>
  <identity>krisv</identity>
  <process-version>1.0</process-version>
  <process-name>ChildProcess</process-name>
  <external-id>demo:CallProcess:1.0</external-id>
</process-instance-log>

Note that, if necessary, you can also get parent process instance information as metadata set on the process instance immediately after it was started:
https://github.com/droolsjbpm/jbpm/blob/master/jbpm-flow/src/main/java/org/jbpm/workflow/instance/node/SubProcessNodeInstance.java#L184

Kris

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