This project has been subject during a LV 1871 coding dojo.
It implements a rest based micro-service utilizing DMN decision tables and an embedded camunda process engine to provide a decision service.
It also shows how to unit-test decision tables and even complete decision requirement diagrams.
Find an article about that at https://medium.com/@davidibl/dmn-business-logic-at-a-glance-45af11359cf5
Have fun and feel free to contact me for further information.