这是COLA规则引擎
hello world 案例:
RuleEngine ruleEngine = new DefaultRuleEngine();
Rule rule = new RuleBuilder()
.name("hello world rule")
.description("always say hello world")
.priority(1)
.when(facts -> true)
.then(facts -> System.out.println("hello world"))
.build();
Rules rules = new Rules();
rules.register(rule);
ruleEngine.fire(rules, null);