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No process or session info in database table
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created by <a href="https://community.jboss.org/people/rafaelsoledadem">Rafael Soledade</a> in <i>jBPM</i> - <a href="https://community.jboss.org/message/787027#787027">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hi,</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I'm developing a business process flow using jBPM, and so far I've created the BPMN and configured the persistence to work with my database. I've noticed a class mapping in the persistence.xml file for the tables SessionInfo, WorkItemInfo and ProcessInstanceInfo, and they are indeed successfully created in my MySQL schema. The problem is, once I start a new knowledge session and run my process instance, nothing is written in those tables, so I can't really restore sessions (not having persistence, then). What am I doing wrong here? Any help would be appreciated!</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Here's my code so far:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>.java main</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>// Load up the events knowledge base</p><p>                    KnowledgeBase eventKbase = readEventKnowledgeBase();</p><p>                    StatefulKnowledgeSession eventKsession = eventKbase</p><p>                                        .newStatefulKnowledgeSession();</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>                    // Load up the knowledge base</p><p>                    KnowledgeBase kbase = readKnowledgeBase();</p><p>                    StatefulKnowledgeSession ksession = null;</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>                    // Settings up JPA persistence</p><p>                    EntityManagerFactory emf = Persistence</p><p>                                        .createEntityManagerFactory("test");</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>                    Environment env = KnowledgeBaseFactory.newEnvironment();</p><p>                    env.set(EnvironmentName.ENTITY_MANAGER_FACTORY, emf);</p><p>                    env.set(EnvironmentName.TRANSACTION_MANAGER,</p><p>                                        TransactionManagerServices.getTransactionManager());</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>                    // create a new knowledge session that uses JPA to store the runtime</p><p>                    // state</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>                    ksession = JPAKnowledgeService.newStatefulKnowledgeSession(kbase, null,</p><p>                                        env);</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>                    // this session id - will have to be stored for recovery of session</p><p>                    int sessionId = ksession.getId();</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>                    System.out.printf("\n-----> Session ID: %d\n", sessionId);</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>                    // loads up the session with sessionId - not sure how to use this yet</p><p>                    // ksession =</p><p>                    // JPAKnowledgeService.loadStatefulKnowledgeSession(sessionId, kbase,</p><p>                    // null, env);</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>                    // uses custom process event listener</p><p>                    ksession.addEventListener(new CustomProcessEventListener(eventKsession));</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>                    // register work items</p><p>                    ksession.getWorkItemManager().registerWorkItemHandler("Notification",</p><p>                                        new MyWorkItemHandler(ksession));</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>                    // start transaction</p><p>                    UserTransaction transaction = (UserTransaction) new InitialContext()</p><p>                                        .lookup("java:comp/UserTransaction");</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>                    transaction.begin();</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>                    // Create the process instance</p><p>                    ProcessInstance processInstance = ksession.createProcessInstance(</p><p>                                        "com.sample.bpmn.hello", null);</p><p>                    System.out.println("\n-----> Starting new Business process "</p><p>                                        + processInstance.getProcessId() + " <ID:" + sessionId + ">\n");</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>                    // Start the BPM process</p><p>                    ksession.startProcessInstance(processInstance.getId());</p><p>                    transaction.commit();</p><p>                    // Did the process instance complete successfully ?</p><p>                    if (processInstance.getState() == ProcessInstance.STATE_COMPLETED) {</p><p>                              System.out.printf("\n-----> Business process "</p><p>                                                  + processInstance.getProcessId() + " <ID:" + sessionId</p><p>                                                  + "> successfully completed\n");</p><p>                    }</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>                    // free resources and end session</p><p>                    emf.close();</p><p>                    ksession.dispose();</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Custom Work Item Handler:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>public class MyWorkItemHandler implements WorkItemHandler {</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>          private KnowledgeRuntime session;</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>          public MyWorkItemHandler() {</p><p>          }</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>          public MyWorkItemHandler(KnowledgeRuntime session) {</p><p>                    this();</p><p>                    this.session = session;</p><p>          }</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>          public void executeWorkItem(WorkItem workItem, WorkItemManager manager) {</p><p>/**</p><p>                    // extract parameters</p><p>                    String from = (String) workItem.getParameter("From");</p><p>                    String to = (String) workItem.getParameter("To");</p><p>                    String message = (String) workItem.getParameter("Message");</p><p>                    String priority = (String) workItem.getParameter("Priority");</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>        // Artificial wait</p><p>        try {</p><p>            Thread.sleep(5000);</p><p>        }</p><p>        catch (Exception ex) {</p><p>        }</p><p>  </p><p>                    System.out.println("###work item handler operations###");</p><p>  </p><p>                    session.getWorkItemManager().completeWorkItem(workItem.getId(), null);</p><p>  </p><p>                    //manager.completeWorkItem(workItem.getId(), null);</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>          }</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>persistence.xml:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><persistence-unit name="test" transaction-type="JTA"></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>                    <provider>org.hibernate.ejb.HibernatePersistence</provider></p><p>                    <class>org.jbpm.persistence.processinstance.ProcessInstanceInfo</class></p><p>                    <class>org.drools.persistence.info.SessionInfo</class></p><p>                    <class>org.drools.persistence.info.WorkItemInfo</class></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>                    <properties></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>                              <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect" /></p><p>                              <property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver" /></p><p>                              <property name="hibernate.connection.url" value="jdbc:mysql://localhost:3306/test" /></p><p>                              <property name="hibernate.connection.username" value="root" /></p><p>                              <property name="hibernate.connection.password" value="12345" /></p><p>                              <property name="hibernate.connection.autocommit" value="false" /></p><p>                              <property name="hibernate.max_fetch_depth" value="3" /></p><p>                              <property name="hibernate.hbm2ddl.auto" value="create" /></p><p>                              <property name="hibernate.show_sql" value="false" /></p><p>                              <property name="hibernate.transaction.manager_lookup_class"</p><p>                                        value="org.hibernate.transaction.BTMTransactionManagerLookup" /></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>                    </properties></p><p>          </persistence-unit></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p></persistence></p></div>
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