I have been using this GitHub repo, GitHub - camunda/camunda-bpmn-js: Embeddable Camunda modeling distributions based on bpmn-js. In this UI, I can’t find any option to write Java code or to use a DRL file. I have a Drools rules (DRL) file. I need to map this DRL file in the business rule task using a rule flow group. Then, I need to execute the BPMN file to execute the BPMN diagram flow. Does anyone have any suggestions for my requirements?
camunda-bpmn-js is for BPMN only. For business rule tasks you can either choose DMN or job worker as an impementation.