DMN Validation in Custom WebController

[Rhett S]

Hi Kogito Team,

(as always. thanks for the support.)

I am attempting to write a custom controller in my Kogito project that will return back validation details on specific DMNs if triggered by client request.

My controller utilizes the Application bean from the auto-generated Kogito code.

@org.springframework.stereotype.Component
@RestController
@ComponentScan("org.kie.kogito.app")
public class HomeController {

@org.springframework.beans.factory.annotation.Autowired() @Qualifier("application")
Application application;

In a java method, I'm attempting to run the DMNValidator on the Traffic%20Violation DMN that I pull from the DecisionModel bean. I know that the Traffic%20Violation DMN has a couple validation warnings. (I can see them @ compile time.) But, in the red code, I get no output from the DMN Validation. What am I doing wrong? Grateful for help, and eager for a response, Rhett

        org.kie.kogito.decision.DecisionModel decision = application.get(org.kie.kogito.decision.DecisionModels.class).getDecisionModel("https://github.com/kiegroup/drools/kie-dmn/_A4BCA8B8-CF08-433F-93B2-A2598F19ECFF", "Traffic Violation");

        

        Set<DecisionNode> nodes = decision.getDMNModel().getDecisions();

        map.put("dmn-name", decision.getDMNModel().getName());

//this works! :-)

        int i = 0;

        for (DecisionNode n : nodes)

        {

            map.put("var" + String.valueOf(i), n.getName());

            System.out.println(n.getName());

        }

//this works! :-)

        Definitions definitions = decision.getDMNModel().getDefinitions();

        for (ItemDefinition item : definitions.getItemDefinition())

        {

            System.out.println(item.getName());

        }

//this doesn't work. validation warnings do not output. 

        DMNValidator validator = DMNValidatorFactory.newValidator();

        List<DMNMessage> messages = validator.validate(definitions);

        System.out.println("validation stuff");

        for (DMNMessage m : messages)

        {

            System.out.println(m.getText());

        }

[Rhett S]

Hi All, I was able to fulfill my need by using the JITRunner + Validator. thx.