Spin + FEEL setup

[raft]

Hi All,

I have a DMN utilizing FEEL and have expressions like:

kpis.`1708` = 0

I use this DMN inside a BPMN as a Business Rule Task.

When I provide the input to DMN as a Java Map, it all works okay. However when the input is Spin JSON, it fails saying context contains no entry with key ‘1708’.

execution.setVariable('kpis', map);  // -> this works
execution.setVariable('kpis', Spin.JSON(map)); // -> this fails

I’m pretty sure the Spin has the entries, since I print it to console. And I even converted it back to Map, which also works fine.

execution.setVariable('kpis', Spin.JSON(map).mapTo(Map.class)); // -> this works too

Any clues?

This is running inside spring-boot-starter. Following are FEEL related dependencies:

		<dependency>
			<groupId>org.camunda.feel</groupId>
			<artifactId>feel-engine</artifactId>
			<version>1.12.4</version>
		</dependency>		
		<dependency>
			<groupId>org.camunda.bpm.extension.feel.scala</groupId>
			<artifactId>feel-engine-plugin</artifactId>
			<version>1.10.1</version>
		</dependency>

Thanks,
Hakan

[McAlm]

Hello @raft,
The quotes are not needed, have you tried without them?

Best, McAlm

[raft]

Hi @McAlm,

I guess in this case they are needed, because the entry is a number. Kinda special character.

But yes, I tried with alphanumeric entry names and without the quotes. Same result.

Best

[McAlm]

Whenever you jsonify your objects the keys will be always represented as String as this is defined by JSON itself.
Map<Object, Object> map = new HashMap<Object, Object>();

	map.put(Integer.valueOf(7401), Integer.valueOf(1407));
	map.put("Palim", "Palam");

	SpinJsonNode json = JSON(map);
	execution.setVariable("kpis", json);
	execution.setVariable("kpis2", Spin.JSON(map).mapTo(Map.class));

[raft]

Hi @McAlm,

True, JSON keys are always strings, but this is not related to JSON but FEEL. kpis.1708 is not a valid FEEL expression. As mentioned in feel-scala documents, if there are special characters in keys they should be wrapped in backquotes.

Anyway, this is not working with alphanumerical keys and without backquotes either. I tried it again. Any other suggestions?

Btw, how do you enable that Variables section in the Camunda cockpit? it doesnt show up in my spring boot app.

Thanks

[McAlm]

The Variables inspection is an enterprise feature. It is not contained in the CommunityEdition.

[McAlm]

I’m seeing the problem, have the same here. The FEEL expression actually is correct, that is the way how a context is queried.The problem seems to be related to the jsonification of the Map.

@Philipp_Ossler: Do you have an idea here?

[Philipp_Ossler]

Using Camunda 7.14, it works for me

I can start a process that calls the business rule task. I use the REST API with the following variables:

{
 "variables":{
   "x" : {
     "value" : "{\"10\":\"x\"}",
     "type": "json"}
 },
 "withVariablesInReturn": true
}