How to model async service task in camunda and implement it in spring boot

Question

I use Camunda as bpmn engine in my spring boot application

Main idea: The first process is started in the controller, and after the response is returned to the client, the Second process should start. I do this using @Async(spring framework) to start the second process and I have two bpmn diagrams: firstProcess secondProcess

Simple implementation of the idea:

@RestController
public class SimpleController {
    @Autowired
    private CustomService asyncService;
    @Autowired
    private CustomService syncService;

    @GetMapping(value = "/request")
    public ResponseEntity<String> sendQuestion() {
        //start process described in first.bpmn
        syncService.startProcess("firstProcess");
        //start process described in second.bpmn asynchronously
        //controller responses to client without waiting for ending secondProcess
        asyncService.startProcess("secondProcess");
        return new ResponseEntity<>("OK", HttpStatus.OK);
    }
}

@Service
public class AsyncService implements CustomService {

    @Autowired
    private RuntimeService runtimeService;

    @Async
    public void startProcess(String key) {
        try {
            Thread.sleep(3000);
        } catch (InterruptedException e) {
            //
        }
        runtimeService.startProcessInstanceByKey(key);
    }
}

Questions: Is there a way to do these two processes in one process (as shown at both processes)? How should I implement this in the spring boot app? bothProcess

Artem Berezovski Artem Berezovski · Accepted Answer · 2020-05-27T18:52:21

You need use Call Activity Task specifying BPMN as CallActivity Type and corresponding process ids in Called Element field on the properties panel. Also don't forget uncheck Startable checkbox for your subprocesses.

How to model async service task in camunda and implement it in spring boot

1 Answers