Kogito Bug when using Declared Types and/or Traits

apache / incubator-kie-kogito-examples

Kogito examples - Kogito is a cloud-native business automation technology for building cloud-ready business applications.

http://kogito.kie.org

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Kogito Bug when using Declared Types and/or Traits #145

Open carlosthe19916 opened 4 years ago

carlosthe19916 commented 4 years ago

I've been trying to use Kogito and Quarkus but I ended up not being able to use all the features that Drools gives. I'm not sure where to raise this bug so I'll start reporting it here:

If I declare a type inside a .drl file the I have an exception: /classes/META-INF/native-image/org/acme/kogito/reflect-config/json.java (11:1) : class, interface, or enum expected.

To reproduce the error you only need to add a declared type inside a .drl file like this example: https://github.com/carlosthe19916/quarkus-quickstarts/blob/patch-1/kogito-quickstart/src/main/resources/org/acme/kogito/person-rules.drl#L6

If I use Traits I also have this exception message: cannot find symbol [ERROR] : method don(....)

Is this a problem that can be solved by adding some configuration or is it a bug? Is it possible to add an example using those features?

Note: I also reported this problem in https://github.com/quarkusio/quarkus-quickstarts/issues/488

evacchi commented 4 years ago

Hi @carlosthe19916

can you try the workflow described here? http://blog.athico.com/2020/03/kogito-ergo-rules-from-knowledge-to.html we are in the process of updating the quickstarts, some uses an older syntax.
traits are currently not supported. What are you trying to achieve?

carlosthe19916 commented 4 years ago

@evacchi Thank you very much for the link provided, it helped a lot.

Now I know that traits are not currently supported
My scenario is that I have 2 Objects (classes) which contains different structures, and the structure of both objects contains other objects inside (something like Person => address => postalCode); I'm using drools to process the first object and move it to the second object (the second object is like a richness version of the first object)... I was just trying to experiment with traits and see if it could help me

evacchi commented 4 years ago

interesting. You can obtain the same behaviour by creating two classes and have a constructor or factory method on the enriched one that copies over the values from the first. If you also need the polymorphic features of traits, you should be able to simulate it through inheritance or interfaces (an EnrichedPerson may extend an Person or you could implement an EnrichedPerson interface)

evacchi commented 4 years ago

PS: you can also get in touch with us through https://groups.google.com/forum/#!forum/kogito-development

rafaeltuelho commented 3 years ago

I hit this same issue today using Kogito 1.6.0.Final. Interesting that the Kogito docs use the DRL declare statement for defining Fact Types for all drools rules examples...

By the way, the workaround pointed in the post does not work...