Hello All,

I am a newbie in JBPM. I have been given task to create workflows.

I have already installed JBPM4.0, and JBOSS AS 5.0 and its running successfully.

I have also been able to run the examples provided in JBPM 4.0

I have referred the following document as a reference:

http://www.jorambarrez.be/blog/2009/07/01/jbpm4-hello-world/

So, starting from the basic example "helloworld" using above configurations, i am unable to create it successfully

I have created "java project"

Following are the files of my application:

helloWorld.jpdl.xml

<?xml version="1.0" encoding="UTF-8"?>

<process name="helloWorld" xmlns="http://jbpm.org/4.0/jpdl">
   <start g="17,64,48,48" name="start">
      <transition to="printHelloWorld"/>
   </start>
   
   <java class="com.tifr.jbpm4.helloworld.Printer" g="221,61,190,52" method="printHelloWorld" name="printHelloWorld">
      <transition to="theEnd"/>
   </java>
   
     <end g="523,60,48,48" name="theEnd"/>
</process>

Printer.java

package com.tifr.jbpm4.helloworld;

public class Printer {
     public void printHelloWorld()
     {
          System.out.println("<---------------->");
          System.out.println("Hello World");
          System.out.println("<---------------->");          
     }
}

helloWorldTest.java

package com.tifr.jbpm4.helloworld;

import org.jbpm.api.Configuration;
import org.jbpm.api.ExecutionService;
import org.jbpm.api.ProcessDefinition;
import org.jbpm.api.ProcessEngine;
import org.jbpm.api.ProcessInstance;
import org.jbpm.api.RepositoryService;

public class helloWorldTest {
     
     private static ProcessEngine processEngine;      
     private static RepositoryService repositoryService;
     private static ExecutionService executionService;
      
     static {
                     
      processEngine = new Configuration().buildProcessEngine();//.setResource("jbpm.cfg.xml").buildProcessEngine();
      System.out.println("processEngine: " + processEngine);     
      
      repositoryService = processEngine.getRepositoryService();//.get(RepositoryService.class);
      System.out.println("repositoryService: " + repositoryService);
      
      executionService = processEngine.getExecutionService();
      System.out.println("executionService: " + executionService);
      
     }
 
     
     public static void main(String[] args) {
          
          try
          {
          
          //create new deployment object and ask it to deploy your flow
           String deploymentId = repositoryService.createDeployment()
                                    .addResourceFromClasspath("com/tifr/jbpm4/helloworld/helloWorld.jpdl.xml")
                                    .deploy();
           
           //now we query the process definition
           ProcessDefinition processDefinition = repositoryService.createProcessDefinitionQuery().deploymentId(deploymentId).uniqueResult();
           
           //start the process instance with the Id of the process definition
           ProcessInstance processInstance = executionService.startProcessInstanceById(processDefinition.getId());

          }
          catch(Exception e)
          {     
               e.printStackTrace();
          }
     }
           
}

jbpm.cfg.xml

<?xml version="1.0" encoding="UTF-8"?>
<jbpm-configuraton>
     <import resources="jbpm.default.cfg.xml" ></import>
     <import resources="jbpm.tx.hibernate.cfg.xml" ></import>
     <import resources="jbpm.jpdl.cfg.xml" ></import>
     <import resource="jbpm.identity.cfg.xml" />
     
     <!-- Job executor is excluded for running the example test cases. -->
      <!-- To enable timers and messages in production use, this should be included. -->
      <!--
      <import resource="jbpm.jobexecutor.cfg.xml" />
      -->
          
</jbpm-configuraton>

jbpm.hibernate.cfg.xml

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
<session-factory>

<property name="hibernate.dialect">org.hibernate.dialect.oracle10gdialect</property>
<property name="hibernate.connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
<property name="hibernate.connection.url">jdbc:oracle:thin:@158.144.71.242:1521:dbatest</property>
<property name="hibernate.connection.username">jbpm</property>
<property name="hibernate.connection.password">jbpm</property>

<property name="hibernate.format_sql">true</property>
<property name="hibernate.hbm2ddl.auto">create-drop</property>

<mapping resource="jbpm.repository.hbm.xml" />
<mapping resource="jbpm.execution.hbm.xml" />
<mapping resource="jbpm.history.hbm.xml" />
<mapping resource="jbpm.task.hbm.xml" />
<mapping resource="jbpm.identity.hbm.xml" />

</session-factory>
</hibernate-configuration>

But when I run the helloWorldTest.java, it gives the following exception:

processEngine: org.jbpm.pvm.internal.cfg.JbpmConfiguration@fe64b9
repositoryService: null
executionService: null
java.lang.NullPointerException
     at com.tifr.jbpm4.helloworld.helloWorldTest.main(helloWorldTest.java:36)

Could any one please help me out in running this simple application.

Thanks in advance.

Best Regards,

Deepak Sharma