Global Event Listener - Error Boundary Event

Camunda 7 Topics Discussion & Questions
1

Hi,

I’m currently working on a simple workflow which contains an error boundary event.
I’m trying to implement an event listener which listens on error boundary events fired.

My company is using Spring (Version: 5.3) in conjunction with Camunda (Version: 7.12).

My current Java class declaration looks like this:

@DependsOn("processEngine")
@Service
@CamundaSelector(type = ActivityTypes.BOUNDARY_ERROR)
@RequiredArgsConstructor
@Lazy(false)
public class GlobalErrorBoundaryEventListener implements ExecutionListener {

I already tried to use “TaskListener” instead of “ExecutionListener” and “ActivityTypes.BOUNDARY_CANCEL” instead of “ActivityTypes.BOUNDARY_ERROR”, but nothing works as expected.

We already use TaskListeners and ExecutionListeners in our software and it works great, so I’m pretty sure I’m just doing it wrong.

I don’t want to have to implement an execution listener and manually add it to every boundary event I want to listen on.
Like this:

<bpmn:boundaryEvent id="Event_1nm5xdu" attachedToRef="ServiceTask_AnderungsvorschriftenInformationenSammeln">
  <bpmn:extensionElements>
    <camunda:executionListener delegateExpression="${eventFiredExpression}" event="start" />
  </bpmn:extensionElements>
  <bpmn:outgoing>Flow_1l13qar</bpmn:outgoing>
  <bpmn:errorEventDefinition id="ErrorEventDefinition_1qgbkjs" camunda:errorCodeVariable="errorCode" camunda:errorMessageVariable="errorMessage" />
</bpmn:boundaryEvent>

Is there a way to listen globally if an error event was fired?

If you need any more information, please let me know.

Have a nice day. :slight_smile:

2

Can you upload your model?
Generally you should be able to have global error handling using an event sub process, but it depends on your model.

3

BPMN Workflow:
collectLawchangeComposerElementsByLaw.bpmn (4.7 KB)

Screenshot:
image

4

And is this pattern being used multiple times in the process model or only this one time?

5

We use this error boundary event pattern multiple times in our processes.
But we’ve only listened to user task events via “TaskListener” until now.
I want to listen globally if error boundary events are fired.

6

A pattern like this would like you have a single error even waiting to catch an error from any task

image
image1221×630 20.1 KB

2 Likes
7

Thank you for this idea. :slight_smile:
I hope this will help someone out there! :wink:

But actually I imagined a much more universal solution for my problem.
I cannot change every process my company uses. We’re talking about hundreds of processes, distributed to different customers.
So I want to be able to hook on to the (Java-side) listener interfaces.

Like this one that we use successfully.
It fires every time a user task is created:

@DependsOn("processEngine")
@CamundaSelector(type = "userTask", event = TaskListener.EVENTNAME_CREATE)
@Service
@RequiredArgsConstructor
@Lazy(false)
public class GlobalTaskCreateListener implements TaskListener {

Isn’t there a possibility to do this for different events in Camunda?

8

Hi @stefan_geiss,

In the past I had implemented

  @Override
  public void notify(DelegateTask delegateTask) {
    if (TaskListener.EVENTNAME_COMPLETE.equals(delegateTask.getEventName())) {
      // Do this 
    } else if (TaskListener.EVENTNAME_UPDATE.equals(delegateTask.getEventName())) {
      // Do that
    }

But I haven’t had this requirement since long time.

Hope this helps, Ingo

1 Like
9

Thank you, I will try something like this.
But it’s still not the answer I’m looking for, so I’ll leave this topic open.