Accessing Quarkus @ApplicationScoped bean in Java Delegate execute method

Flowable Engine
1

Hello Flowable team!

I’m trying to inject and use a Quarkus @ApplicationScoped bean in the following class implementing JavaDelegate:

@ApplicationScoped
public class TestDelegate implements JavaDelegate {
    Logger logger = Logger.getLogger(this.getClass().getName());
    @Inject
    TestService testService;

    @Override
    public void execute(final DelegateExecution execution) {
        logger.info("TestService says: " + testService.test());
    }
}

TestService is a very simple @ApplicationScoped bean:

@ApplicationScoped
public class TestService {
    Logger logger = Logger.getLogger(this.getClass().getName());

    public String test() {
        return "Thanks for calling me!";
    }
}

I’ve tried the following BPMN configurations and none of them seems to be working.

Config 1

        <serviceTask id="externalSystemCall" name="Enter holidays in external system"
                     flowable:class="full.package.name.TestDelegate"/>

This configuration throws a NullPointerException on testService.test() as testService is null.

Config 2

        <serviceTask id="externalSystemCall" name="Enter holidays in external system"
                     flowable:expression="${testDelegate.execute}"/>

This configuration throws a org.flowable.common.engine.api.FlowableException: Unknown property used in expression: ${testDelegate.execute} with Execution[ id ‘26’ ] - definition ‘holidayRequest2:1:6’ - activity ‘externalSystemCall’ - parent ‘22’\r\n\tat org.flowable.common.engine.impl.el.JuelExpression.getValue(JuelExpression.java:54)

Config 3

        <serviceTask id="externalSystemCall" name="Enter holidays in external system"
                     flowable:delegateExpression="${testDelegate.execute}"/>

This configuration throws a org.flowable.common.engine.api.FlowableException: Unknown property used in expression: ${testDelegate.execute} with Execution[ id ‘35’ ] - definition ‘holidayRequest3:1:9’ - activity ‘externalSystemCall’ - parent ‘31’\r\n\tat org.flowable.common.engine.impl.el.JuelExpression.getValue(JuelExpression.java:54)

Config 4

        <serviceTask id="externalSystemCall" name="Enter holidays in external system"
                     flowable:delegateExpression="${testDelegate}"/>

This configuration throws a org.flowable.common.engine.api.FlowableException: Unknown property used in expression: ${testDelegate} with Execution[ id ‘44’ ] - definition ‘holidayRequest4:1:12’ - activity ‘externalSystemCall’ - parent ‘40’\r\n\tat org.flowable.common.engine.impl.el.JuelExpression.getValue(JuelExpression.java:54)

Would you have ideas about how to solve this? Or are Quarkus beans not supported yet?

Thanks in advance for your help!