I am facing the following errors when i start the process
Exception in thread "main" javax.persistence.PersistenceException: [PersistenceUnit: org.jbpm.persistence.jpa] Unable to build EntityManagerFactory
at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:677)
at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:126)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:52)
at org.jbpm.test.JBPMHelper.loadStatefulKnowledgeSession(JBPMHelper.java:147)
at org.jbpm.test.JBPMHelper.newStatefulKnowledgeSession(JBPMHelper.java:136)
at com.sample.ProcessMain.main(ProcessMain.java:20)
Caused by: org.hibernate.HibernateException: Could not obtain BTM transaction manager instance
at org.hibernate.transaction.BTMTransactionManagerLookup.getTransactionManager(BTMTransactionManagerLookup.java:50)
at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:367)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1341)
at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:867)
at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:669)
... 5 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.hibernate.transaction.BTMTransactionManagerLookup.getTransactionManager(BTMTransactionManagerLookup.java:47)
... 9 more
Caused by: bitronix.tm.utils.InitializationException: cannot open disk journal
at bitronix.tm.BitronixTransactionManager.<init>(BitronixTransactionManager.java:75)
at bitronix.tm.TransactionManagerServices.getTransactionManager(TransactionManagerServices.java:62)
... 14 more
Caused by: java.io.IOException: The process cannot access the file because another process has locked a portion of the file
at java.io.RandomAccessFile.read(Native Method)
at java.io.RandomAccessFile.readInt(RandomAccessFile.java:720)
at bitronix.tm.journal.TransactionLogHeader.<init>(TransactionLogHeader.java:96)
at bitronix.tm.journal.TransactionLogAppender.<init>(TransactionLogAppender.java:69)
at bitronix.tm.journal.DiskJournal.open(DiskJournal.java:151)
at bitronix.tm.BitronixTransactionManager.<init>(BitronixTransactionManager.java:62)
... 15 more
The source code for this process is
Processmain.java ---
package com.sample;
import org.drools.KnowledgeBase;
import org.drools.builder.KnowledgeBuilder;
import org.drools.builder.KnowledgeBuilderFactory;
import org.drools.builder.ResourceType;
import org.drools.io.ResourceFactory;
import org.drools.runtime.StatefulKnowledgeSession;
import org.jbpm.test.JBPMHelper;
/**
* This is a sample file to launch a process.
*/
public class ProcessMain {
public static final void main(String[] args) throws Exception {
startUp();
// load up the knowledge base
KnowledgeBase kbase = readKnowledgeBase();
StatefulKnowledgeSession ksession = JBPMHelper.newStatefulKnowledgeSession(kbase);
// start a new process instance
ksession.startProcess("com.sample.bpmn.hello");
System.out.println("Process started ...");
}
private static KnowledgeBase readKnowledgeBase() throws Exception {
KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
kbuilder.add(ResourceFactory.newClassPathResource("sample.bpmn"), ResourceType.BPMN2);
return kbuilder.newKnowledgeBase();
}
private static void startUp() {
JBPMHelper.startH2Server();
JBPMHelper.setupDataSource();
// please comment this line if you already have the task service running,
// for example when running the jbpm-installer
//JBPMHelper.startTaskService();
}
}
ProcessTest.java -------
package com.sample;
import java.util.List;
import org.drools.runtime.StatefulKnowledgeSession;
import org.drools.runtime.process.ProcessInstance;
import org.jbpm.task.TaskService;
import org.jbpm.task.query.TaskSummary;
import org.jbpm.test.JbpmJUnitTestCase;
import org.junit.Test;
/**
* This is a sample file to launch a process.
*/
public class ProcessTest extends JbpmJUnitTestCase {
public ProcessTest() {
super(true);
setPersistence(true);
}
@Test
public void testProcess() {
StatefulKnowledgeSession ksession = createKnowledgeSession("sample.bpmn");
TaskService taskService = getTaskService(ksession);
ProcessInstance processInstance = ksession.startProcess("com.sample.bpmn.hello");
assertProcessInstanceActive(processInstance.getId(), ksession);
assertNodeTriggered(processInstance.getId(), "Start", "Task 1");
// let john execute Task 1
List<TaskSummary> list = taskService.getTasksAssignedAsPotentialOwner("john", "en-UK");
TaskSummary task = list.get(0);
System.out.println("John is executing task " + task.getName());
taskService.start(task.getId(), "john");
taskService.complete(task.getId(), "john", null);
assertNodeTriggered(processInstance.getId(), "Task 2");
// let mary execute Task 2
list = taskService.getTasksAssignedAsPotentialOwner("mary", "en-UK");
task = list.get(0);
System.out.println("Mary is executing task " + task.getName());
taskService.start(task.getId(), "mary");
taskService.complete(task.getId(), "mary", null);
assertNodeTriggered(processInstance.getId(), "End");
assertProcessInstanceCompleted(processInstance.getId(), ksession);
ksession.dispose();
}
}