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I have a sample Hello project with following structure

C:\jbpmTrial\Hello is my workspace :  Hello is the project within jbpmTrial workspace

*Hello

   ------src

         ------org.example.sample.greeting

               -----Hello.java

               -----hello.jpdl.xml

               ------hello.png

               ------review.ftl

         ------- jbpm.cfg.xml

         ------- jbpm.hibernate.cfg.xml  

    jBPM Libraries

jbpm installation: C:\jbpm-4.4

Jboss: C:\jboss-5.1.0.GA

jdk:C:\jdk1.6.0_21

I modified the ant build file provided with sample examples to deploy Hello project. I am able to see deployment on jbpm console and even the task forms and view the sample println outputs produced from another function in Hello.java file using cmd.

However when i try to access the processEngine and program/code certain logic in the main method I get an error

Exception in thread "main" java.lang.ExceptionInInitializerError

at org.jbpm.pvm.internal.cfg.ConfigurationParser.<init>(ConfigurationParser.java:46)

at org.jbpm.pvm.internal.cfg.ConfigurationParser.<clinit>(ConfigurationParser.java:49)

at org.jbpm.pvm.internal.cfg.ConfigurationImpl.parse(ConfigurationImpl.java:137)

at org.jbpm.pvm.internal.cfg.ConfigurationImpl.setResource(ConfigurationImpl.java:116)

at org.jbpm.pvm.internal.cfg.ConfigurationImpl.setResource(ConfigurationImpl.java:50)

at org.jbpm.api.Configuration.setResource(Configuration.java:79)

at org.example.sample.greeting.Hello.main(Hello.java:26)

Caused by: org.jbpm.api.JbpmException: couldn't get resource urls for jbpm.user.wire.bindings.xml

at org.jbpm.pvm.internal.wire.xml.WireParser.<clinit>(WireParser.java:284)

... 7 more

Caused by: java.lang.NullPointerException

at org.jbpm.pvm.internal.wire.xml.WireParser.<clinit>(WireParser.java:281)

... 7 more

The error  is observed @ line:

ProcessEngine processEngine = new Configuration().setResource("C:/jbpmTrial/Hello/src/jbpm.cfg.xml").buildProcessEngine();

The main method that i am trying to run is :

public static void main(String args[])

{

String location="C:/jbpmTrial/Hello/src/jbpm.cfg.xml";

URL u = ClassLoader.getSystemResource(location);

ProcessEngine processEngine = new Configuration().setResource("C:/jbpmTrial/Hello/src/jbpm.cfg.xml").buildProcessEngine();

System.out.println("Hello world, Starting the flow");

System.out.println("Ending the flow");

}

jbpm.cfg.xml file is:

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

<jbpm-configuration>

  <import resource="jbpm.default.cfg.xml" />

  <import resource="jbpm.businesscalendar.cfg.xml" />

  <import resource="jbpm.tx.hibernate.cfg.xml" />

  <import resource="jbpm.jpdl.cfg.xml" />

  <import resource="jbpm.bpmn.cfg.xml" />

  <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" />

  -->

  <string name="jbpm.mail.smtp.host" value="smtp.gmail.com" />

  <string name="resource.mail.properties" value="jbpm.mail.properties" />

</jbpm-configuration>

Can anyone please explain me What is the root cause and give me pointers in appropriate direction to solve this. I am starting with Jbpm.