3:53 a.m.
Csaba K [https://community.jboss.org/people/chabee] created the discussion
"JPAWorkingMemoryDbLogger NullPointerException"
To view the discussion, visit: https://community.jboss.org/message/800237#800237
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*Hi,*
*I am a newbie JBPM user and I would like to get history log.*
*I use JBPM v5.3,I tried it with a sapmle process, and I get the Exception below:*
Exception in thread "main" java.lang.NullPointerException
at
org.jbpm.process.audit.JPAWorkingMemoryDbLogger.addProcessLog(JPAWorkingMemoryDbLogger.java:90)
at
org.jbpm.process.audit.JPAWorkingMemoryDbLogger.logEventCreated(JPAWorkingMemoryDbLogger.java:65)
at org.drools.audit.WorkingMemoryLogger.filterLogEvent(WorkingMemoryLogger.java:196)
at
org.drools.audit.WorkingMemoryLogger.beforeProcessStarted(WorkingMemoryLogger.java:421)
at
org.drools.event.ProcessEventSupport.fireBeforeProcessStarted(ProcessEventSupport.java:40)
at
org.jbpm.process.instance.ProcessRuntimeImpl.startProcessInstance(ProcessRuntimeImpl.java:167)
at
org.jbpm.process.instance.ProcessRuntimeImpl.startProcess(ProcessRuntimeImpl.java:138)
at
org.jbpm.process.instance.ProcessRuntimeImpl.startProcess(ProcessRuntimeImpl.java:130)
at
org.drools.common.AbstractWorkingMemory.startProcess(AbstractWorkingMemory.java:1077)
at
org.drools.impl.StatefulKnowledgeSessionImpl.startProcess(StatefulKnowledgeSessionImpl.java:315)
at com.sample.ProcessMain.main(ProcessMain.java:25)
*The java code:*
public class ProcessMain {
public static final void main(String[] args) throws Exception {
KnowledgeBase kbase = readKnowledgeBase();
StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();
*JPAWorkingMemoryDbLogger logger = new JPAWorkingMemoryDbLogger(ksession);*
ksession.startProcess("com.sample.bpmn.hello");
*logger.dispose()*;
}
private static KnowledgeBase readKnowledgeBase() throws Exception {
KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
kbuilder.add(ResourceFactory.newClassPathResource("sample.bpmn"),
ResourceType.BPMN2);
return kbuilder.newKnowledgeBase();
}
}
*I use an in-memory H2 database, I created the three tables (process,node and variable
log), the JTA datasource*
*is binded to this database in the jbpm-ds.xml file. My persistence.xml is the
following:*
<?xml version="1.0" encoding="UTF-8"
standalone="yes"?>
<persistence version="1.0"
xsi:schemaLocation=" http://java.sun.com/xml/ns/persistence
http://java.sun.com/xml/ns/persistence
http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd
http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd
http://java.sun.com/xml/ns/persistence/orm
http://java.sun.com/xml/ns/persistence/orm
http://java.sun.com/xml/ns/persistence/orm_1_0.xsd
http://java.sun.com/xml/ns/persistence/orm_1_0.xsd"
xmlns:orm=" http://java.sun.com/xml/ns/persistence/orm
http://java.sun.com/xml/ns/persistence/orm"
xmlns:xsi=" http://www.w3.org/2001/XMLSchema-instance
http://www.w3.org/2001/XMLSchema-instance"
xmlns=" http://java.sun.com/xml/ns/persistence
http://java.sun.com/xml/ns/persistence">
<persistence-unit name="org.jbpm.persistence.jpa"
transaction-type="JTA">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<jta-data-source>java:jboss/datasources/jbpmDS</jta-data-source>
<mapping-file>META-INF/JBPMorm.xml</mapping-file>
<mapping-file>META-INF/ProcessInstanceInfo.hbm.xml</mapping-file>
<class>org.jbpm.persistence.processinstance.ProcessInstanceInfo</class>
<class>org.drools.persistence.info.SessionInfo</class>
<class>org.drools.persistence.info.WorkItemInfo</class>
<class>org.jbpm.process.audit.ProcessInstanceLog</class>
<class>org.jbpm.process.audit.NodeInstanceLog</class>
<class>org.jbpm.process.audit.VariableInstanceLog</class>
<properties>
<property name="hibernate.dialect"
value="org.hibernate.dialect.H2Dialect"/>
<property name="hibernate.max_fetch_depth" value="3"/>
<property name="hibernate.hbm2ddl.auto" value="update" />
<property name="hibernate.show_sql" value="false" />
<!-- for AS7 -->
<property name="hibernate.transaction.manager_lookup_class"
value="org.jbpm.integration.console.JBPMTransactionManager" />
</properties>
</persistence-unit>
</persistence>
*Thanks for your help!*
*Csaba*
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