Drools6：规则互斥

public class Message {

    public static final int HELLO = 1;

    public static final int GOODBYE = 0;

    private String message;

    private int status;

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }

    public int getStatus() {
        return status;
    }

    public void setStatus(int status) {
        this.status = status;
    }

}

package com.china.lxl.droolstest.entity

import com.china.lxl.droolstest.entity.Message

rule "Hello"
    when
        m : Message(status == Message.HELLO, myMessage : message)
    then
        System.out.println(myMessage);
        m.setMessage("GoodBye");
        m.setStatus(Message.GOODBYE);
        update(m);
end

rule "GoodBye"
    salience 1
    activation-group "Bye"
    when
       m : Message(status == Message.GOODBYE, myMessage : message)
    then
       System.out.println("GoodBye");
end

rule "GoodBye1"
    salience 2
    activation-group "Bye"
    when
       m : Message(status == Message.GOODBYE, myMessage : message)
    then
       System.out.println("GoodBye1");
end