Is there a way to start / stop jobExecutor or processEngine programatically?

Camunda 7 Topics Discussion & Questions
1

I’d like to choose the exact moment when jobExecutor (or the whole engine) is activated when starting my application so it waits until all other services are available. Is there a way to do so? Any of the following or similar?

  • processEngine.start()
  • processEngine.stop()
  • processEngine.jobExecutor.start()
  • processEngine.jobExecutor.stop()
2

Hi @mabertran,

I don’t quite understand if you want to attach a listener to one of those phases or trigger starting of engine from your code?

Cheers,
Askar

3

Do you use Spring? I just implemented a custom JobExecutor that implements SmartLifecycle to achieve this. Pretty simple and straight forward.

4

I want the engine not to start until all application services are set up, and this takes a while. The best way to achieve that is to manually tell the engine to start (or at least, the job executor).

In my application (grails) this would be done after Bootstrap.groovy

5

I use groovy, which uses spring so this might work. Is the code public?

6

Unfortunately: no … but I think I will either write a short blog or integrate it into the spring boot starter.

Basically:

  • extend the SpringJobExecutor with an own class and set it on the configuration. Your implementation must implement SmartLifecycle. This basically allows setting “phases” when to run the code. I just set it to Int.MAX, so it runs last. Make sure you use it as spring-bean, not just “new”.
  • in the config, set isJobExecutorActivate to false, so the executor is not started with the engine.
  • thats it
7

Thanks for the reply, I’ll try this one!