CODEWITHSUNDEEP
spring-bootcamundaorchestrationcamunda-modeler
scoder
scoder

Reputation: 2611

camunda bpnm spring boot activity delegates matching is not working

I downloaded the sample provided for spring micro services orchestration from GITHUB

it works as the details given in the description, but now I am trying t build my own workflow and not able to map how the call flow(code gets exectued) from one activity to other activity.

In the bpnm guide it shows the first activity name as Retrieve Shopping Cart and second one as Validate Address but when I start the workflow with rest call from the below code

public class ShoppingCartRestController {

    @Autowired
    private ProcessEngine camunda;

    @RequestMapping(value = "/{scId}/submit", method = RequestMethod.POST)
    public ResponseEntity<?> placeOrderPOST(@PathVariable("scId") String scId) {
        ProcessContext context = new ProcessContext();
        submitShoppingCart(scId, context);
        if (context.getError() != null) {
            return new ResponseEntity<>(context.getError(), HttpStatus.FORBIDDEN);
        }
        return new ResponseEntity<>(context.getResponse(), HttpStatus.OK);

    }

    private ProcessInstance submitShoppingCart(String scId, ProcessContext context) {
        return camunda.getRuntimeService().startProcessInstanceByKey(//
                "submitShoppingCart", //
                Variables //
                        .putValue(ProcessConstants.VAR_SC_ID, scId).putValue(ProcessConstants.VAR_CTX, context));
    }
}

from the above I am not able to get how it delegates to retrieve address and in turn that delegates to validate address and so on to end the flow ?

And how the process is linked from submitShoppingCart.bpmn (Name in this and Actual classes are not matching ?

Upvotes: 2

Views: 839

Answers (1)

Jan Galinski
Jan Galinski

Reputation: 12013

Question 2 first: java api and process match via the processes technical id. you see it in the "startProcessInstanceByKey" call: submitShoppingCart is the technical id of the process. In The modeller, you find it at the very top of the properties panel.enter image description here

Question 1: The camunda Java API links service Tasks to execution via JavaDelegate interfaces. So for each service task, there is a class that implements what should happen in its execute(DelegateExecution execution) method.

In spring projects, these delegates are in general referred to by their bean names ... in your example, the "Retrieve Shopping Card" service is backed by the ${retrieveShoppingCartActivity} delegate. By convention, the bean name equals the class name, so look for RetrieveShoppingCartActivity to see what's inside.

Upvotes: 1

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