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Comment by leetrout | Hacker News Reader

One strong advantage is how well it integrates with Drools so if you’re a Java shop and happen to be using Drools you can just drop in optaplanner and have it optimize around facts.

Because it’s Java you can use it with all the various libraries and any compatible languages that support Java libs like kotlin and Scala.

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Drools is awesome and we use it in some of our projects. but it just feels very monolithic and not a cloud native solution. What are some good lightweight alternatives to drools?

Roll your own incremental score calculator ;)

Drools looks and sounds very good, but we already have a standard specification for workflow graphs called scxml and there are libraries which implement it and editors which can create it visually. I was hoping it would get more traction outside of Qt.

Kogito is a nice upgrade that we've now been experimenting with for some months https://kogito.kie.org/

Kogito dev here if you folks have questions :)

Thank you.

Is Kogito ready for production use? Does it have a UI that lets users develop their own rules?

we are working hard to deliver a stable version. stay tuned :) but it is still currently under heavy development. If you are interested in visually design rules, you might want to look into DMN!

OKAY, thanks. Does DMN integrate with Kogito? (maybe that's not a valid question?)

DMN is integral part of Kogito and they work really well. That was actually the main reason for us looking into that direction.

Yeah, it does. If you want to learn more about it, check this: http://learn-dmn-in-15-minutes.com (it's a quick course I created to cover DMN on Kogito world)

This is really cool. Will keep coming back to it and share it with users as we start using this more.

For decision tables, definitly look at Kogito and Drools-DMN as alternatives.

To declare incremental constraints in OptaPlanner, take a look at ConstraintStreams if you want to avoid learning DRL: https://www.optaplanner.org/blog/2020/04/07/ConstraintStream... It's very similar to Java 8 Streams (but incremental and under the hood it uses Drools).

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