SpringBoot - activiti - Get ProcessVariables

Question

I have this piece of code :

    List<ProcessInstance> instances =
                    processEngine.getRuntimeService().createProcessInstanceQuery().processInstanceId(processInstanceId).list();

instances.forEach(this::listProcessInstance);

    private void listProcessInstance (ProcessInstance processInstance) {
    
                log.info("<-------------- ProcessInstance ---------------> {} ", processInstance);
                log.info(String.valueOf(processInstance.getProcessVariables()));
                log.info("<-------------- ProcessInstance --------------->");
    
    
        }

where ProcessVariables is null, but going on the tabla there are info:

select * from ACT_RU_VARIABLE where PROC_INST_ID_ = 76759;

Answer 1

For performance reasons the default query does not return the process variables. You have to explicitly tell the query to include the variables:

 List<ProcessInstance> instances = processEngine.getRuntimeService().createProcessInstanceQuery().processInstanceId(processInstanceId).includeProcessVariables().list();