How do I get processInstance info from the global listener?

Camunda 7 Topics Discussion & Questions
1

I want to get the processInstanceInfo from the global listener when I start the process

But ,It’s null.

ProcessInstanceId is not null.

@Slf4j
@Component
public class CamundaEventListeners {

    @Resource
    RuntimeService runtimeService;
    
    @EventListener
    public void onExecutionEvent(DelegateExecution executionDelegate) {

        //it's null 
        ProcessInstance processInstance =  runtimeService.createProcessInstanceQuery().processInstanceId(executionDelegate.getProcessInstanceId()).singleResult();
        log.info("Handling mutable DelegateExecution:{},{}", executionDelegate.getCurrentActivityName(),executionDelegate.getCurrentActivityId());
    }
   
}
2

Hello @Luka.xiaofeng ,

do you have a wait state before? If not, the process instance is not yet saved to the database and cannot be queried.

By setting async before on a start event, you will get your process instance saved to the database immediately.

@Niall this one is for you :joy:

1 Like
3

Thanks. @jonathan.lukas
I’ve set async before on a start event.

but execution listeners will not be invoked synchronously?

4

Hello @Luka.xiaofeng ,

indeed, ExecutionListeners are invoked synchronously.

Did the async before on start event solve the problem?

Jonathan

5

Hi @jonathan.lukas
I would probably solve the problem from a business perspective.

6

Hi @Luka.xiaofeng ,

what would that mean for you?

Jonathan

7

HI. @jonathan.lukas
Maybe I can use variables .
I just want to get the processinstance startuserId in listener.

8

Hello @Luka.xiaofeng ,

for this, there is a field in the start event called Initiator. By entering a value there, the userId of the user starting the process instance will be mapped to this variable.

image
image936×836 27.6 KB

This will do the trick.

Jonathan

1 Like
9

HI. @jonathan.lukas
It’s solved my problem.
Thanks.

1 Like
10

Hello Jonathan,

i have the similar problem im ExecutionListener on ServiceTask : that is next after Start Event:
Cannot fetch a ProccessInstance for processInstanceId by std. Query:
private ProcessInstance getProcessInstanceForId(String processInstanceId) {
return runtimeService.createProcessInstanceQuery().processInstanceId(processInstanceId).singleResult(); // .active() ??
}
// because it is not persisted
PROBLEM-1:

  1. if I don’t use a “before” : it gets Null ProcessInstance for processInstanceId in ExecutionListener

  2. if I use a “before” of SeviceTask : Process token it is hanging without execution of serviceTask !

before + after should : persist before and go towards User Task. Am I right ?

What is a problem ?

PROBLEM-2:
Timer does not fire

TA_Timer_Test
TA_Timer_Test2250×2340 455 KB

TA_Timer_Test.bpmn (17.0 KB)

1 Like
11

problem solved !!! It war a wrong property in application.yaml:
job-execution:
enabled: false

correct config for spring boot are:

see: Process Engine Configuration | docs.camunda.org

camunda:
bpm:
admin-user:
id: demo
password: demo
lastName: DemoAdmin
filter:
create: All Tasks
job-execution:
enabled: true
default-number-of-retries: 3

  1. Execution Listener + Timer requires System Threads (Camunda Jobs).
  2. But it is also important to set in start event “before” to persist a state (ProcessInstance) to camunda DB !
1 Like
12

Glad you found the solution to your problem!

In the future, please avoid reviving old threads and instead post a new thread for your problem. This helps everything stay organized for any future readers. Thank you!