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Call Activity and BusinessKey Update

Question asked by doganmesut on May 12, 2016
Latest reply on May 12, 2016 by doganmesut
Hey guys,
I am currently facing an issue. Lets say I have a process called X and the other process is Y which is called by Call Activity.
and Y is called as a subprocess by X. But I realised that businesskey of X is cannot be copied for Y. I found a solution that I put a service task just before first task of Y and I called  a method in this service task to copy business key of X. But if you take a look below method it seems ok but the problem is process instance alywas null. I couldnt figure why. If you could help me I will be glad. Thanks!

    public void updateBusinessKey(DelegateExecution execution) {
        ProcessInstance processInstance = runtimeService.createProcessInstanceQuery().includeProcessVariables()
        String referenceId = (String) processInstance.getProcessVariables().get(PROCESS_REFERENCE_ID);
        runtimeService.updateBusinessKey(processInstance.getId(), referenceId);
        LOGGER.debug("BusinessKey has been updated succesfully. Process Instance ID : " + processInstance.getId());