HammurabiScala规则引擎
Hammurabi 是一个 Scala 编写的规则引擎,适合实现便于阅读的内部DSL。与其他 DSL 不同的是,Hammurabi 可直接使用宿主语言编写和编译规则。
示例规则:
rule ("Person to Fred’s immediate right is wearing blue pants") let { val p1 = kindOf[Person] having (_.name == "Fred") val p2 = any(kindOf[Person]) when { p2.pos equals p1.pos + 1 } then { assign color "blue" to p2 } }
评论