Exclude BPMN files from scanner to avoid error

[Boi Hoogervorst]

Hi there,

I am currently building a project where we use Drools for making the decisions based on  DMN models and we use Camunda for the process side with BPMN models.

Currently i have two subfolders in my resources folder:

/resources/bpmn

/resources/dmn-models

Whenever i put a bpmn model in the /bpmn folder Drools will throw an exception in runtime when i want to execute a dmn model:

java.lang.RuntimeException: Unknown resource type: ResourceType = 'jBPM BPMN2 Language'

However, as I mentioned i do not want Drools to do anything with BPMN files, is there a way to exclude the BPMN files for Drools in the kmodule.xml / application.yml file?

regards,

Boi

[Matteo Mortari]

Hi Boi,

you could consider defining a no-op assembler, 

something ~like: https://github.com/tarilabs/demo20230612-unkresource/blob/8615bb07687bc1fd9f452069d3d930c5125d06d1/src/main/java/org/drools/demo/NoopMyKieAssembler.java#L6

and register it on the kieassemblers services: https://github.com/tarilabs/demo20230612-unkresource/blob/8615bb07687bc1fd9f452069d3d930c5125d06d1/src/main/resources/META-INF/services/org.kie.api.internal.assembler.KieAssemblerService#L1

the small demo: https://github.com/tarilabs/demo20230612-unkresource

demonstrates how doing this way the .bpmn2 file would get ignored by the no-op assembler on the kie-maven-plugin and Drools builder KIE API side of things.

Naturally, this takes care of having .bpmn2 file ignored by the Drools side of things so I would expect you will need to manage on the other process engine implementation side depending on your integration needs.

Hope this helps!

MM

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Matteo Mortari

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[Boi Hoogervorst]

Thank you Matteo!

It works perfectly! I had it working in 5 minutes based on the example you provided! (After hours of trying on my own)......

cheers!

Boi

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