在使用spring 4安装drools 6时出错-- processData(LicenseCredential)方法对于Rule_Renewal_alert_for_60类型未定义]

Question

我对口水不熟悉。我用Spring4.1和drool-6.1.0.Final建立了一个新项目。但是，当我试图运行项目时，我会得到以下错误

Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'autoalert-ksession-stateless': Cannot resolve reference to bean 'autoalert-kbase' while setting bean property 'kBase'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'autoalert-kbase': Invocation of init method failed; nested exception is java.lang.RuntimeException: Error while creating KieBase[Message [id=1, level=ERROR, path=drools/rules/Rule.drl, line=27, column=0
text=[ function processDataprocessData (line:27): learnerCsvFileWriter cannot be resolved
]], Message [id=2, level=ERROR, path=drools/rules/Rule.drl, line=33, column=0
  text=Rule Compilation error The import defaultpkg.ProcessData cannot be resolved
The method processData(LicenseCredential) is undefined for the type Rule_Renewal_alert_for_60_days2039807096], Message [id=3, level=ERROR, path=drools/rules/Rule.drl, line=-1, column=0
text=Error importing : 'defaultpkg.ProcessData.processData']]

这里是我的spring和drools配置文件

drools-context.xml

<kie:kmodule id="autoalert-module">
    <kie:kbase name="autoalert-kbase" packages="drools.rules">
        <kie:ksession name="autoalert-ksession-stateless" type="stateless"  />
    </kie:kbase>
</kie:kmodule>

<bean id="kiePostProcessor" class="org.kie.spring.KModuleBeanFactoryPostProcessor"/>

applicationContext.xml

<context:annotation-config />              
<context:property-placeholder location="classpath:autoalert.properties" ignore-unresolvable="true" /> 

<import resource="classpath:database/datasource-tx.xml" />
<import resource="classpath:drools/drools-context.xml" />

<bean id="csvFileWriter" class="com.softech.vu360.autoalert.CsvFileWriter" />

<bean id="businessRuleProcessor" class="com.softech.vu360.autoalert.rule.BusinessRuleProcessor">
    <property name="statelessKieSession" ref="autoalert-ksession-stateless" />
    <property name="csvFileWriter" ref="csvFileWriter" />
</bean>

这是我的规则文件。

import com.softech.vu360.autoalert.util.Utility;
import static com.softech.vu360.autoalert.util.Utility.getCurrentDate;
import static com.softech.vu360.autoalert.util.Utility.getDate;
import static com.softech.vu360.autoalert.util.Utility.getMonthNameFromInt;
import com.softech.vu360.autoalert.model.LicenseCredential;
import com.softech.vu360.autoalert.model.Learner;
import com.softech.vu360.autoalert.CsvFileWriter;
import com.softech.vu360.autoalert.mail.EmailRegistrationService;
import java.util.Date;

global com.softech.vu360.autoalert.CsvFileWriter learnerCsvFileWriter;

function void processData(LicenseCredential licenseCredential){

    Learner learner = new Learner();
    learner.setLearnerName(licenseCredential.getLearnerName());  
    learner.setLearnerEmailAddress(licenseCredential.getLearnerEmailAddress());
    learner.setUserGUID(licenseCredential.getUserGUID());
    ...
    learnerCsvFileWriter.add(learner);

}

rule "Renewal alert for 60 days"
    when
        licenseCredential : LicenseCredential()
        (
            eval(licenseCredential.getRenewalDeadlineDay() == "0" && licenseCredential.getRenewalDeadlineMonth() == "0") && 
            eval(getCurrentDate().after(getDate(2, licenseCredential.getCourseCompletionDate().getDate(), licenseCredential.getCourseCompletionDate().getMonth()+1))) && 
            eval(getCurrentDate().before(getDate(1, licenseCredential.getCourseCompletionDate().getDate(), licenseCredential.getCourseCompletionDate().getMonth()+1))) 
         ) ||
        (
            eval(getCurrentDate().after(getDate(2, Integer.valueOf(licenseCredential.getRenewalDeadlineDay()), Integer.valueOf(licenseCredential.getRenewalDeadlineMonth()) ))) &&
            eval(getCurrentDate().before(getDate(1, Integer.valueOf(licenseCredential.getRenewalDeadlineDay()), Integer.valueOf(licenseCredential.getRenewalDeadlineMonth() )))) 
        )
    then
        System.out.println("Rule For 60 Days Called");      
        processData(licenseCredential);
end

这是我的POM文件：

<properties>
    <java-version>1.8</java-version>
    <junit.version>4.12</junit.version> 

    <!-- Spring -->
    <org.springframework.version>4.1.4.RELEASE</org.springframework.version>

    <!-- Drools -->
    <drools.version>6.1.0.Final</drools.version>
    <drools-maven-plugin.version>6.0.0.CR5</drools-maven-plugin.version>

    <maven-compiler-plugin.version>3.2</maven-compiler-plugin.version>
   ...

    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

</properties>

<dependencies>

    <!-- Spring -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>${org.springframework.version}</version>
    </dependency>
    ....
    <!-- Drools -->
    <dependency>
        <groupId>org.kie</groupId>
        <artifactId>kie-api</artifactId>
        <version>${drools.version}</version>
    </dependency>

    <dependency>
        <groupId>org.kie</groupId>
        <artifactId>kie-ci</artifactId>
        <version>${drools.version}</version>
    </dependency>

    <dependency>
        <groupId>org.kie</groupId>
        <artifactId>kie-spring</artifactId>
        <version>${drools.version}</version>
    </dependency>

    <dependency>
        <groupId>org.jbpm</groupId>
        <artifactId>jbpm-bpmn2</artifactId>
        <version>${drools.version}</version>
    </dependency>

    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-api</artifactId>
        <version>${org.slf4j-version}</version>
    </dependency>
</dependencies>

<build>
    <finalName>${project.artifactId}</finalName>
    <plugins>

        <!-- Maven compiler plugin -->
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.0</version>
            <configuration>
                <source>${java-version}</source>
                <target>${java-version}</target>
            </configuration>
        </plugin>
        ....
        <plugin>
            <groupId>org.drools</groupId>
            <artifactId>drools-maven-plugin</artifactId>
            <version>${drools-maven-plugin.version}</version>
            <extensions>true</extensions>
        </plugin>
    </plugins>
</build>

这是我的主要文件

public static void main(String[] args){ 

    final ApplicationContext context = new ClassPathXmlApplicationContext("classpath:spring/applicationContext.xml");

    LicenseCredentialDAO dao = (LicenseCredentialDAOImpl)context.getBean("licenseCredentialDAO");
    List<LicenseCredential> objectList = dao.select();

    BusinessRuleProcessor ruleProcessor = (BusinessRuleProcessor)context.getBean("businessRuleProcessor");
    ruleProcessor.configureAndApplyRulesOnObject(objectList);

    CsvFileWriter learnerCsvFileWriter = context.getBean("csvFileWriter", CsvFileWriter.class);
    learnerCsvFileWriter.writeCsvFile("abc.csv");

}

这是我的BusinessRuleProcessor课

public class BusinessRuleProcessor {
    private StatelessKieSession statelessKieSession;
    private CsvFileWriter csvFileWriter;

    // getters and setters

    public void configureAndApplyRulesOnObject(List<LicenseCredential> objectList){

        statelessKieSession.setGlobal("learnerCsvFileWriter", csvFileWriter);
        statelessKieSession.execute(objectList);

    }
}

为什么我会犯错误

function processDataprocessData (line:27): learnerCsvFileWriter cannot be resolved

Rule Compilation error The import defaultpkg.ProcessData cannot be resolved

The method processData(LicenseCredential) is undefined for the type Rule_Renewal_alert_for_60_days2039807096]

请帮帮忙。

谢谢

Answer 1

奇怪的是，函数processDataprocessData中显示了一个错误，这个错误不在您发布的DRL中，但另一个错误是没有函数processData，它出现在DRL中。你伪造密码了吗？

但问题很简单，您不能在函数中引用全局。若要使用全局值，请将其作为参数传递。

function void processData(LicenseCredential licenseCredential,
                          CsvFileWriter learnerCsvFileWriter ){
    ....
}

rule ...
then
    System.out.println("Rule For 60 Days Called");      
    processData(licenseCredential, learnerCsvFileWriter);
end

请向口水小组投诉！