There are numerous articles out there that will tell you not to roll your own rule engine and indeed there are lots of them out there. But unless you are solvi

There are numerous articles out there that will tell you not to roll your own rule engine and indeed there are lots of them out there. But unless you are solving a well known problem, I've always found the open source rule engines to be either opinionated or just too large/unwieldy. It's not THAT hard to make your own. You only ever a handful of chances in your career to implement a rule engine anyway - since they are usually the core of the software that a company sells. Make it right!