JBoss Community

Mauricio,  I am trying to create a statefull session, but the error always goes into checking for JTA UserTransaction inside SingleSessionCommandService.

Here's the exception and below are my config files and java code. Hope its something simple you can point out!!! Thx

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14:03:06,392 ERROR [SingleSessionCommandService] Could not commit session

java.lang.NullPointerException

        at org.drools.persistence.jta.JtaTransactionManager.getStatus(JtaTransactionManager.java:197)

        at org.drools.persistence.jta.JtaTransactionManager.begin(JtaTransactionManager.java:150)

        at org.drools.persistence.SingleSessionCommandService.<init>(SingleSessionCommandService.java:120)

        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)

        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)

        at java.lang.reflect.Constructor.newInstance(Constructor.java:513)

        at org.drools.persistence.jpa.KnowledgeStoreServiceImpl.buildCommanService(KnowledgeStoreServiceImpl.java:116)

        at org.drools.persistence.jpa.KnowledgeStoreServiceImpl.newStatefulKnowledgeSession(KnowledgeStoreServiceImpl.java:54)

        at org.drools.persistence.jpa.JPAKnowledgeService.newStatefulKnowledgeSession(JPAKnowledgeService.java:122)

-----------------------persistence.xml----------------------------------------------

<persistence-unit name="org.jbpm.engine.persistence.jpa" transaction-type="RESOURCE_LOCAL">

    <provider>org.hibernate.ejb.HibernatePersistence</provider>

    <non-jta-data-source>java:jbpmDS</non-jta-data-source>

          <class>org.drools.persistence.info.SessionInfo</class>

    <class>org.jbpm.persistence.processinstance.ProcessInstanceInfo</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.Oracle10gDialect"/>

      <property name="hibernate.hbm2ddl.auto" value="validate" />

      <property name="hibernate.max_fetch_depth" value="3"/>

      <property name="hibernate.show_sql" value="true" />

      <property name="hibernate.transaction.manager_lookup_class" value="org.hibernate.transaction.JBossTransactionManagerLookup" />

    </properties>

  </persistence-unit>

</persistence>

---------------Spring config  file----------------------------------

          <jee:jndi-lookup id="processengine.dataSource" jndi-name="java:/jbpmDS"/>

          <context:annotation-config/>

          <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">

                    <property name="entityManagerFactory" ref="entityManagerFactory" />

          </bean>

          <bean id="entityManagerFactory"

                    class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">

                    <property name="persistenceUnitName" value="org.jbpm.engine.persistence.jpa" />

                    <property name="dataSource" ref="processengine.dataSource" />

          </bean>

          <bean id="processEngine" name="processEngine"

                    class="com.processengine.jbpm.impl.MyJBPMHandler">

                    <property name="emf" ref="entityManagerFactory" />

          </bean>

--------------End spring config file----------------------------------

-------------------MyJBPMHandler Java class-----------------------------------------

public class MyJBPMHandler{

private javax.persistence.EntityManagerFactory emf;

public EntityManagerFactory getEmf() {

                    return emf;

          }

          public void setEmf(EntityManagerFactory emf) {

                    this.emf = emf;

          }

          public void init(){

                    KnowledgeBase kbase  = KnowledgeBuilderFactory.newKnowledgeBuilder().newKnowledgeBase();

                    Environment env = KnowledgeBaseFactory.newEnvironment();

                    env.set( EnvironmentName.ENTITY_MANAGER_FACTORY, emf );

                    StatefulKnowledgeSession ksession = JPAKnowledgeService.newStatefulKnowledgeSession(kbase,null,env);

          }

}

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