Catch Signal Events in a Spring Boot app

Camunda 7 Topics Discussion & Questions
1

Hi all.

I’m trying to catch signal events in a spring boot app with a embebed camunda engine.
For instance, if we want to catch the “Police Conditions Changed” signal in this process to execute some custom code:

It’s possible to configure some bean in the spring boot app to catch this signals?

Can you point me some directions?

Thanks for your help.

2

A Signal (and messages) is typically designed to signal other BPMN. If you want to trigger some code, have you looked at using a service task that points to your code? see: https://docs.camunda.org/get-started/spring/service-task/

1 Like
3

Hi @StephenOTT,

Thank you for your answer. That maybe a option for some of the processes but, in other, process’s execution don’t depend’s directly from that logic, we want to decouple the business logic from it.

4

Can you explain further what you are trying to do and why you want to do it with a signal

5

For instance, when process A ends, we want to (asynchrony) execute some business logic that checks some form data record in some of the tasks of process A and starts n instances of process B, using some of the data in variables.

Maybe using a model like this https://github.com/camunda/camunda-bpm-reactor. Based on that, I’m trying to use a custom ProcessEnginePlugin…

6

you can do this using Java Delegates. You just need to trigger your delegate in your End event as a execution Listener; Have the Delegate trigger your async code.