Hi Guys,
I am quite inexperienced with JTA & JPA. I am trying to join JBPM5.1 transaction with my current application's transaction.
In my current application, I had obtained the transaction using things like this:
building the sessionFactotry:
//my current application uses the hibernate.cfg.xml
Configuration config = new Configuration().configure();
SessionFactory factory = new Configuration().configure().buildSessionFactory();
Usering the session factory:
factory.getCurrentSession().beginTransaction();
//do CRUD
factory.getCurrentSession().commit();
In the persistence.xml of jbpm-persistence-jpa-5.1.0.Final.jar I had put
<?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/persistence_1_0.xsd
http://java.sun.com/xml/ns/persistence/orm http://java.sun.com/xml/ns/persistence/orm_1_0.xsd"
xmlns:orm="http://java.sun.com/xml/ns/persistence/orm" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="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>same-datasource-as-my-current-applications</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.max_fetch_depth" value="3" />
<property name="hibernate.show_sql" value="false" />
<property name="hibernate.transaction.manager_lookup_class"
value="org.hibernate.transaction.WeblogicTransactionManagerLookup" />
</properties>
</persistence-unit>
</persistence>
In my JBPM StatefulKnowledgeSession creation, I had done something like this.
Environment env = KnowledgeBaseFactory.newEnvironment();
env.set(EnvironmentName.ENTITY_MANAGER_FACTORY, emf);
StatefulKnowledgeSession session = JPAKnowledgeService.newStatefulKnowledgeSession(knowledgebase, null, env);
I am able to manage transactions of both side separately by doing something like:
//commit to my application tables first
factory.getCurrentSession().beginTransaction();
//do CRUD
factory.getCurrentSession().commit();
//then commit to jbpm tables.
UserTransaction ut = (UserTransaction) new InitialContext().lookup("java:comp/UserTransaction");
ut.begin();
....
ut.commit();
This is working ok. But I prefer to combine the two transaction into one since they are supposed to be one work-unit.
I had trying for a week for to no avail. I am also quite confused with the fact that some hibernate apps are using hibernate.cfg.xml and some are using JPA specific persistence.xml . There are multiple copies of these XML files in different jars. I just couldn't get the whole picture of the thing. Any help is greately appreciated !