Important note

Easy Rules documentation has been moved to GitHub here. This website will be shutdown by the end of July 2017.

What is Easy rules?

Easy Rules is a simple yet powerful Java rules engine providing the following features:

  • Lightweight framework and easy to learn API
  • POJO based development
  • Useful abstractions to define business rules and apply them easily
  • The ability to create composite rules from primitive ones

In a very interesting article about rules engines, Martin Fowler says:

You can build a simple rules engine yourself. All you need is to create a bunch of objects with conditions and actions, store them in a collection, and run through them to evaluate the conditions and execute the actions.

This is exactly what Easy Rules does, it provides the Rule abstraction to create rules with conditions and actions, and the RulesEngine API that runs through a set of rules to evaluate conditions and execute actions.