jbang drools.java (improved)

drools.java

///usr/bin/env jbang "$0" "$@" ; exit $?
//JAVA 16
//REPOS jitpack=https://jitpack.io/
//DEPS com.github.evacchi:drools-jbang-starter:main-SNAPSHOT

// example
// jbang <url> '{ "name":"Mario", "age":40 }' '{ "name":"Mark", "age":37 }'

package org.kie.example;

import static java.lang.System.*;
import org.kie.api.*;
import org.kie.api.builder.*;
import org.kie.api.runtime.*;
import com.github.evacchi.*;
import com.fasterxml.jackson.databind.ObjectMapper;


public class drools {
    public static record Person(String name, int age) {}

    final static String drl = """
    package org.kie.example;
    import org.kie.example.drools.*;

    rule MyRule when
       $mark: Person(name == "Mark")
       $older: Person(name != "Mark" && age > $mark.age)
    then
        System.out.printf("%s is older than %s", $older.name(), $mark.name());
        System.out.println();
    end

    """;

    public static void main(String... args) throws Exception {
        var kieSession = 
            DroolsLauncher.create()
                .withRules(drl)
                .session();

        var mapper = new ObjectMapper();
            for (var s: args) {
            var person = mapper.readValue(s, Person.class);
            kieSession.insert(person);
        }

        kieSession.fireAllRules();
        kieSession.dispose();
    }

}