Call Activity - How to make the parent process not to wait until the sub process is finished.

[Gopan Sugathan]

Hi,

I am trying to spawn sub process from a main process using multi instance call activity.

However I have requirement for the main process not to wait for completion of the sub process and want the main process to continue further.

Is this possible in camunda ?

Kind regards,

Gopan

[thorben....@camunda.com]

Hi Gopan,

In this case, the call activity is not suitable I think. According to the BPMN specification, a call activity ends when the called process ends. There is no asynchronous call activity.

One way of implementing your use case is via message events. Your called process would have a message start event and instead of a multi-instance call activity, you would use a multi-instance send task.

Best regards,
Thorben

[Gopan Sugathan]

Hi Thorben,

Thank You very much that works. I have another question. I am trying to respond from each of  the sub process to main process using send Task from sub process and  receiveTask from main process at the same instant.

runtime.createMessageCorrelation("ZoneTestMessage").processInstanceId(parentPI).correlate();

The correlation is successful but I am getting an error 

rror] o.c.b.e.i.i.CommandContext - Error while closing command context

org.camunda.bpm.engine.impl.pvm.PvmException: already taking a transition

at org.camunda.bpm.engine.impl.persistence.entity.ExecutionEntity.take(ExecutionEntity.java:518) ~[camunda-engine-7.1.0-Final.jar:7.1.0-Final]

at org.camunda.bpm.engine.impl.bpmn.behavior.BpmnActivityBehavior.performOutgoingBehavior(BpmnActivityBehavior.java:102) ~[camunda-engine-7.1.0-Final.jar:7.1.0-Final]

at org.camunda.bpm.engine.impl.bpmn.behavior.BpmnActivityBehavior.performDefaultOutgoingBehavior(BpmnActivityBehavior.java:51) ~[camunda-engine-7.1.0-Final.jar:7.1.0-Final]

at org.camunda.bpm.engine.impl.bpmn.behavior.FlowNodeActivityBehavior.leave(FlowNodeActivityBehavior.java:44) ~[camunda-engine-7.1.0-Final.jar:7.1.0-Final]

at org.camunda.bpm.engine.impl.bpmn.behavior.AbstractBpmnActivityBehavior.leave(AbstractBpmnActivityBehavior.java:47) ~[camunda-engine-7.1.0-Final.jar:7.1.0-Final]

 

Kind regards,

Gopan

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[thorben....@camunda.com]

Hi Gopan,

This sounds like a bug. It would be great if you could share your (simplified) process models or even better provide a failing test case. For the latter, you can use the unit testing template of link [1].

Cheers,
Thorben

[1] https://github.com/camunda/camunda-engine-unittest

[Ingo Richtsmeier]

Hi Gopan,

I did it recently on project with this approach:

https://github.com/camunda/camunda-consulting/tree/master/one-time-examples/counterparty-onboarding#start-independent-subprocess

Have a look at the JUnit-Test for further clarification.

Kind Regards,

Ingo

[Gopan Sugathan]

Thank You very much Ingo and Thorben. I solved this using multi instance Send Activity and some custom intermediate queuing using scala.

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