Decision Requirements Graph: How to evaluate programatically?

[StephenOTT]

Is there helpers for evaluating DRDs with an initial input?

Something similar to: ...dmnEngine.evaluateDecision(...) but working with the initial DRD?

Thanks

x-ref:

Evaluating DRD (chain of decision logic) via Java API

Hi, In a DRD chain of Decision Tables/ Literal Expression, I am able to evaluate individually each of them via DecisionService API. How can I evaluate complete DRD chain of decision tables/literal expression from Java API (Decision Service API) by passing input variables and getting the final output from the end of the Chain of decision logic in DRD.

[StephenOTT]

based on this section: https://docs.camunda.org/manual/7.12/user-guide/dmn-engine/evaluate-decisions/#decisions-with-required-decisions, it would seem it will eval based on the selected output decision / The decision that is last in the chain that will provide the final output? (So DRD helper would not be required as it would require the selection of the key to eval is the final output key?)

[dominikh]

Hi @StephenOTT

Yes that’s right, you get the result of the table you run. If the table has dependencies on other tables, they will be executed automatically. So in a DRD you have to specify the key of the table of which you want the result. An example (here the whole engine is booted) can be found here: https://github.com/Nlea/NY-cheesecake-process/blob/master/src/test/java/com/camunda/flowcovexample/DMNTest.java

[StephenOTT]

Thanks @dominikh