I'beginner in jBPM 'im using jBPM 3 and i want to invoke a deployed process with a main methode.

here my Class  main

package com.sample;

import org.jbpm.JbpmConfiguration;

import org.jbpm.JbpmContext;

import org.jbpm.db.GraphSession;

import org.jbpm.graph.def.ProcessDefinition;

import org.jbpm.graph.exe.ProcessInstance;

public class ClientApp {

    static JbpmConfiguration jbpmConfiguration=null;

    public static void main(String[] args) {

        jbpmConfiguration=JbpmConfiguration.parseResource("jbpm.cfg.xml");

        JbpmContext jbpmContext=jbpmConfiguration.createJbpmContext();

        GraphSession graphSession=jbpmContext.getGraphSession();

        //create parent process

        ProcessDefinition pdef=graphSession.findLatestProcessDefinition("loanProcess");

        ProcessInstance processInstance=pdef.createProcessInstance();

        //set default valus to the parent context variable

        processInstance.getContextInstance().setVariable("SSNValue", "123");

        processInstance.getContextInstance().setVariable("status", "false");

        org.jbpm.graph.exe.Token token=processInstance.getRootToken();

        token.signal();

        String ssn =(String) processInstance.getContextInstance().getVariable("SSNValue");

        System.out.println("***********************SSNVAlue: "+ssn );

        jbpmContext.close();

    }

}

When i run it i have this trace:

Exception in thread "main" java.lang.NoClassDefFoundError: javax/transaction/SystemException

    at java.lang.Class.getDeclaredConstructors0(Native Method)

    at java.lang.Class.privateGetDeclaredConstructors(Class.java:2357)

    at java.lang.Class.getConstructor0(Class.java:2671)

    at java.lang.Class.newInstance0(Class.java:321)

    at java.lang.Class.newInstance(Class.java:303)

    at org.hibernate.transaction.TransactionFactoryFactory.buildTransactionFactory(TransactionFactoryFactory.java:37)

    at org.hibernate.cfg.SettingsFactory.createTransactionFactory(SettingsFactory.java:418)

    at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:138)

    at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2073)

    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1298)

    at org.jbpm.persistence.db.DbPersistenceServiceFactory.getSessionFactory(DbPersistenceServiceFactory.java:105)

    at org.jbpm.persistence.db.DbPersistenceService.getSessionFactory(DbPersistenceService.java:81)

    at org.jbpm.persistence.db.DbPersistenceService.getSession(DbPersistenceService.java:86)

    at org.jbpm.persistence.db.DbPersistenceService.getGraphSession(DbPersistenceService.java:330)

    at org.jbpm.JbpmContext.getGraphSession(JbpmContext.java:636)

    at com.sample.ClientApp.main(ClientApp.java:15)