Zeliang Huang [http://community.jboss.org/people/ossa] created the discussion "Joining JBPM transaction with my current application's transaction" To view the discussion, visit: http://community.jboss.org/message/640954#640954 -------------------------------------------------------------- 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.hbm2ddl.auto" value="update" />  -->             <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 ! -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/640954#640954] Start a new discussion in jBPM at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]