使用狀態會話，Drools BRMS火災和警報規則無法按預期工作

Question

我正在嘗試執行Drools文檔中的火災，灑水和警報規則。

我正在使用drools 6.5運行時，當我使用statefull會話（KIE會話）執行此示例時，我可以看到以下輸出，該輸出與文檔中提到的輸出不同。

以下是我在工作內存輸出中插入自動噴水滅火時看到的輸出：

一切都很好發出警報

根據文檔的實際輸出為：

一切正常發出警報開啟房間廚房的灑水裝置開啟房間辦公室的灑水裝置

感謝任何幫助，以找出為什么我沒有其他兩個規則被解雇的原因。

附加源代碼：

package com.company.license

import com.sample.dto.*

rule "When there is a fire turn on the sprinkler"
when
    Fire($room : room)
    $sprinkler : Sprinkler( room == $room, on == false )
then
    modify( $sprinkler ) { setOn( true ) };
    System.out.println( "Turn on the sprinkler for room " + $room.getName() );
end

rule "When the fire is gone turn off the sprinkler"
when
    $room : Room( )
    $sprinkler : Sprinkler( room == $room, on == true )
    not Fire( room == $room )
then
    modify( $sprinkler ) { setOn( false ) };
    System.out.println( "Turn off the sprinkler for room " + $room.getName() );
end

rule "Raise the alarm when we have one or more fires"
when
    exists Fire()
then
    insert( new Alarm() );
    System.out.println( "Raise the alarm" );
end

rule "Cancel the alarm when all the fires have gone"
when
    not Fire()
    $alarm : Alarm()
then
    retract( $alarm );
    System.out.println( "Cancel the alarm" );
end


rule "Status output when things are ok"
when
    not Alarm()
    not Sprinkler( on == true )
then
    System.out.println( "Everything is ok" );
end



package com.sample.dto;

public class Alarm {

}

package com.sample.dto;

public class Fire {
    private Room room;

    public Fire(Room room2) {
        // TODO Auto-generated constructor stub
    }

    public Room getRoom() {
        return room;
    }

    public void setRoom(Room room) {
        this.room = room;
    }
}

package com.sample.dto;

public class Room {
    private String name;


    public Room(String name){
        this.name = name;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

package com.sample.dto;

public class Sprinkler {
    private Room room;
    private boolean on;

    public Sprinkler(Room room) {
        // TODO Auto-generated constructor stub
        this.room = room;
    }
    public Room getRoom() {
        return room;
    }
    public void setRoom(Room room) {
        this.room = room;
    }
    public boolean isOn() {
        return on;
    }
    public void setOn(boolean on) {
        this.on = on;
    }
}

<?xml version="1.0" encoding="UTF-8"?>
<kmodule xmlns="http://jboss.org/kie/6.0.0/kmodule">
    <kbase name="rules" packages="rules">
        <ksession name="ksession-rules"/>
        <ksession name="statelesssession" type="stateless" default="true"/>
    </kbase>
    <kbase name="dtables" packages="dtables">
        <ksession name="ksession-dtables"/>
    </kbase>
    <kbase name="process" packages="process">
        <ksession name="ksession-process"/>
    </kbase>
</kmodule>

public class FireAlarmStateful {

    public static final void main(String[] args) {
        try {
            // load up the knowledge base
            KieServices ks = KieServices.Factory.get();
            KieContainer kContainer = ks.getKieClasspathContainer();
            KieSession ksession = kContainer.newKieSession("ksession-rules");

            String[] names = new String[]{"kitchen", "bedroom", "office", "livingroom"};
            Map<String,Room> name2room = new HashMap<String,Room>();
            Room kitchen =  new Room("kitchen");
            Room office =  new Room("office");
            ksession.insert( kitchen );
            ksession.insert( office );
            Sprinkler sprinkler1 = new Sprinkler( kitchen);
            Sprinkler sprinkler2 = new Sprinkler( office);
            ksession.insert( sprinkler1 );
            ksession.insert( sprinkler2 );
            ksession.fireAllRules();

            Fire kitchenFire = new Fire( kitchen );
            Fire officeFire = new Fire( office );
            FactHandle kitchenFireHandle = ksession.insert( kitchenFire );
            FactHandle officeFireHandle = ksession.insert( officeFire );
            ksession.fireAllRules();

            ksession.dispose();

        } catch (Throwable t) {
            t.printStackTrace();
        }
    }
}


Output I get is : 
Everything is ok
Raise the alarm

Output mentioned in the Drools Documentation:
Everything is ok 
Raise the alarm 
Turn on the sprinkler for room kitchen 
Turn on the sprinkler for room office

Answer 1

我已經解決了。 Fire對象的構造函數為空。

public Fire(Room room2) {
    // TODO Auto-generated constructor stub
}

我修好了它 。

public Fire(Room room2) {
    this.room =  room2 ;
}

而且有效。