4 Replies Latest reply on Sep 21, 2012 7:20 AM by soyeur

Tomcat6 + Spring + JBPM5.3 integration

soyeur Aug 14, 2012 7:08 AM

Hello

I have a web application configured to work in tomcat using spring . I'm trying to add JBPM workflow engine to my application.

I have configured persistence to work with MySql and JPA 2.0 in persistence.xml. and I have added a spring bean contaning transaction manager and EntityManagerFactory.

My probleme is I got the error saying could not parse knowledge when running the following:

KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
kbuilder.add(ResourceFactory.newClassPathResource("process/Evaluation.bpmn"), ResourceType.BPMN2); 

KnowledgeBuilderErrors errors = kbuilder.getErrors();



KnowledgeBase kbase = kbuilder.newKnowledgeBase();

The line in green check if there is any errors. it contain [ProcessLoadError: unable to parse xml : Exception class java.lang.NullPointerException : null]

Any help will be great

Thinx

1. Re: Tomcat6 + Spring + JBPM5.3 integration

jjborie Aug 15, 2012 11:24 PM (in response to soyeur)

Did you put : process/Evaluation.bpmn in src/main/resources ?

It should work.
Actions
2. Re: Tomcat6 + Spring + JBPM5.3 integration

soyeur Aug 16, 2012 6:50 AM (in response to jjborie)

Yes I did put process/Evaluation.bpmn in src/main/resources

By the way, I have the same project in JPA1.0 and it work but when upgrade to JPA2.0 my database was updated and user are inserted in organizationalentity table
but i have that message saying could not parse knowledge when loading Evaluation.bpmn into knowledge Builder.

Other think I'm trying to debug KnowledgeBuilderImpl which contain implementation of "kbuilder.add(resource,type)" but I can't find source (I'm working with eclipse)
have you any idea about how to do that?
Actions
3. Re: Tomcat6 + Spring + JBPM5.3 integration

zabalet Aug 16, 2012 7:54 AM (in response to soyeur)

Hi Houssem,

the full stack trace of these could be off help. But it seems that the ResourceFactory could not find the resource then returning a null at some point.
Actions

4. Re: Tomcat6 + Spring + JBPM5.3 integration

soyeur Sep 21, 2012 7:20 AM (in response to zabalet)

Sorry to respond too late.

Application-context.xml (Spring)

	<context:annotation-config />
	<tx:annotation-driven />

	<bean:bean id="jbpmEmf"
		class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">

		<bean:property name="persistenceUnitName" value="org-jbpm-persistence-jpa" />
	</bean:bean>

	<bean:bean id="jbpmTxManager"
		class="org.springframework.orm.jpa.JpaTransactionManager">
		<bean:property name="entityManagerFactory" ref="jbpmEmf" />
	</bean:bean>

	<bean:bean id="jbpTaskmEmf"
		class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
		<bean:property name="persistenceUnitName" value="org-jbpm-task" />
	</bean:bean>

	<bean:bean id="jbpmTaskTxManager"
		class="org.springframework.orm.jpa.JpaTransactionManager">
		<bean:property name="entityManagerFactory" ref="jbpTaskmEmf" />
	</bean:bean>

	<drools:grid-node id="node1"/>

	<drools:kbase id="kbase1" node="node1">

<drools:resources>

<drools:resource type="BPMN2" source="classpath:Evaluation.bpmn"/>

</drools:resources>

</drools:kbase>

<drools:ksession id="ksession1" type="stateful" kbase="kbase1" node="node1">

<drools:configuration>

<drools:jpa-persistence>

<drools:transaction-manager ref="jbpmTxManager"/>

<drools:entity-manager-factory ref="jbpmEmf"/>

</drools:jpa-persistence>

</drools:configuration>

</drools:ksession>

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'kbase1': Invocation of init method failed; nested exception is java.lang.RuntimeException: ProcessLoadError: unable to parse xml : Exception class java.lang.NullPointerException : null

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1455)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)

at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)

at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)

at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)

at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)

at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:567)

at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913)

at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464)

at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:385)

at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:284)

at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:111)

at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4206)

at org.apache.catalina.core.StandardContext.start(StandardContext.java:4705)

at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:799)

at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:779)

at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:601)

at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:943)

at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:778)

at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:504)

at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1317)

at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:324)

at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142)

at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1065)

at org.apache.catalina.core.StandardHost.start(StandardHost.java:840)

at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057)

at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)

at org.apache.catalina.core.StandardService.start(StandardService.java:525)

at org.apache.catalina.core.StandardServer.start(StandardServer.java:754)

at org.apache.catalina.startup.Catalina.start(Catalina.java:595)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:601)

at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)

at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)

Caused by: java.lang.RuntimeException: ProcessLoadError: unable to parse xml : Exception class java.lang.NullPointerException : null

at org.drools.container.spring.beans.KnowledgeBaseBeanFactory.afterPropertiesSet(KnowledgeBaseBeanFactory.java:121)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1514)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1452)

... 36 more

Go to original post