dynamic dmn execution with json payload

[Ravi Mangalagiri]

I have a simple dmn which I am trying to execute dynamically. and here is the payload - {loan: {"baseLoanAmount":450000,"transaction":{"insuranceAmount":52000}}}

Is there any api similar to this which takes context as string or JSONObject?

DMNContext dmnContext = new DynamicDMNContextBuilder(dmnRuntime.newContext(), dmnModel).populateContextWith(context);

I tried the following and had no luck.

Map<String, Object> context = new HashMap<>();

context.put("loan", new JSONObject().put("baseLoanAmount", new BigDecimal("450000")).put("transaction", new JSONObject().put("insuranceAmount", new BigDecimal("52000"))));

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Ravi Mangalagiri
703-505-4240 (c)

[Matteo Mortari]

Hi Ravi,

I'm not sure if I'm fully understanding your use-case this time, so I will advance some pointers:

A.

If you are looking to invoke DMN engine programmatically while being on the Kogito platform, you can use the Kogito API Incubation

blog post: https://blog.kie.org/2021/09/kogito-api-incubation.html

jira: https://issues.redhat.com/browse/KOGITO-1030

B.

If you are looking for a way to manually handle the context from string unmarshalling to the DMN context,

you can use directly the Jackson unmarshaller, this will return a (jdk) Map of entry value pairs of the most common types, and not JSONObject

then you can wire the generic Map unmarshalled by Jackson (which will contain "baseLoanAmount"-450000, "transaction"-a Map of "insuranceAmount"-52000, etc)

and then you can use the internal DynamicDMNContextBuilder to build a DMNContext.

Alternatively, you can rely on the Kogito API Incubation mentioned above.

Hope these are helpful pointers, and don't hesitate to let us know more details if something is still unclear?

MM

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Matteo Mortari

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[Ravi Mangalagiri]

Thanks Matteo.

I will go with option A.

One of the requirements : A springboot batch application be able to run dmn programmatically based on the payload (stored in a database)

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