[rules-users] Spring + Drools + Console Application

[Anderson Neves]

Hi everybody.

I am having a problem to instantiate a console application with Drools and
Sping. With Spring, I am able to instanciate a bean and print its value to
console, but with Spring + Drools I get this error:

Exception in thread "main"
org.springframework.beans.factory.BeanCreationException: Error creating bean
with name 'kbase': Invocation of init method failed; nested exception is
java.lang.RuntimeException: Unable to parser Reader
        at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1338)
        at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:473)
        at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409)
        at java.security.AccessController.doPrivileged(Native Method)
        at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:380)
        at
org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:264)
        at
org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
        at
org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:261)
        at
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:185)
        at
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)
        at
org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:423)
        at
org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:728)
        at
org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:380)
        at
org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
        at
org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)
        at com.test.Test.main(Test.java:10)
Caused by: java.lang.RuntimeException: Unable to parser Reader
        at org.drools.compiler.DrlParser.getParser(DrlParser.java:313)
        at org.drools.compiler.DrlParser.parse(DrlParser.java:141)
        at org.drools.compiler.DrlParser.parse(DrlParser.java:147)
        at
org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:263)
        at
org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:458)
        at
org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:519)
        at
org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:28)
        at
org.drools.container.spring.beans.KnowledgeBaseBeanFactory.afterPropertiesSet(KnowledgeBaseBeanFactory.java:103)
        at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1369)
        at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1335)
        ... 15 more
Caused by: java.lang.NullPointerException
        at java.io.FilterInputStream.close(Unknown Source)
        at
sun.net.www.protocol.jar.JarURLConnection$JarURLInputStream.close(Unknown
Source)
        at sun.nio.cs.StreamDecoder.implClose(Unknown Source)
        at sun.nio.cs.StreamDecoder.close(Unknown Source)
        at java.io.InputStreamReader.close(Unknown Source)
        at
org.antlr.runtime.ANTLRReaderStream.load(ANTLRReaderStream.java:92)
        at
org.antlr.runtime.ANTLRInputStream.<init>(ANTLRInputStream.java:68)
        at
org.antlr.runtime.ANTLRInputStream.<init>(ANTLRInputStream.java:52)
        at
org.antlr.runtime.ANTLRInputStream.<init>(ANTLRInputStream.java:48)
        at
org.antlr.runtime.ANTLRInputStream.<init>(ANTLRInputStream.java:40)
        at org.drools.compiler.DrlParser.getParser(DrlParser.java:308)
        ... 24 more

I use eclipse, and running from the IDE Spring + Drools in a console
application works fine. This problem happens when I generate an executable
jar and try the "java -jar" command.

My main method is below

public static void main(String[] args) {
        ClassPathXmlApplicationContext context = new
ClassPathXmlApplicationContext("appConfig.xml");
        StatefulKnowledgeSession ksession = (StatefulKnowledgeSession)
context.getBean("ksession");
        System.out.println(ksession);
}

And my applicationContext.xml is below

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:drools="http://drools.org/schema/drools-spring"
       xmlns:camel="http://camel.apache.org/schema/spring"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
                           http://drools.org/schema/drools-spring
http://anonsvn.jboss.org/repos/labs/labs/jbossrules/trunk/drools-container/drools-spring/src/main/resources/org/drools/container/spring/drools-spring-1.0.0.xsd
                           http://camel.apache.org/schema/spring
http://camel.apache.org/schema/spring/camel-spring.xsd">

      <drools:kbase id="kbase">
        <drools:resources>
            <drools:resource source="classpath:knowledgebase-config.xml"
type="CHANGE_SET" />
        </drools:resources>
    </drools:kbase>

    <drools:ksession id="ksession" type="stateful" kbase="kbase" />
</beans>

Any clue of what is cousing the problem? Thank you very much.

Regards,
Anderson
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