聊聊drools session的不同

<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.drools</groupId>
            <artifactId>drools-bom</artifactId>
            <type>pom</type>
            <version>7.69.0.Final</version>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>

<dependencies>
    <dependency>
        <groupId>org.drools</groupId>
        <artifactId>drools-compiler</artifactId>
    </dependency>
    <dependency>
        <groupId>org.drools</groupId>
        <artifactId>drools-mvel</artifactId>
    </dependency>
    <dependency>
        <groupId>ch.qos.logback</groupId>
        <artifactId>logback-classic</artifactId>
        <version>1.2.11</version>
    </dependency>
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>1.18.22</version>
    </dependency>
</dependencies>

@Data
@AllArgsConstructor
public class Counter {
    /**
     * 名称
     */
    private String name;
    /**
     * 计数
     */
    private Integer cnt;
}

<kmodule xmlns="http://www.drools.org/xsd/kmodule">
    <kbase name="kabse-01" packages="rules.stateful" default="false">
        <!--
            type="stateful" 表示有状态的session
        -->
        <ksession name="stateful-session" default="false" type="stateful"/>
    </kbase>
    <kbase name="kabse-02" packages="rules.stateless" default="false">
        <!--
            type="stateless" 表示无状态的session
        -->
        <ksession name="stateless-session" default="false" type="stateless"/>
    </kbase>
</kmodule>

package rules.stateful
import com.huan.drools.Counter
// 将counter中的cnt的值递增一下
rule "stateful_rule_count_increment"
    when
        $counter: Counter( )
    then
        $counter.setCnt($counter.getCnt() + 1);
        System.out.println("rule_count_increment: count name:[" + $counter.getName()+"],cnt=[" + $counter.getCnt() + "]");
end
// 如果工作内存中同时存在 count-01 和 counter-02 则输出ok
rule "stateful_rule_count_exists"
    when
        Counter(name == "count-01") and Counter(name == "count-02")
    then
        System.out.println("ok");
end