1 Reply Latest reply on Aug 3, 2006 1:55 PM by Koen Aers

    NPE from ProcessState

    Trevor Brosnan Newbie

      I have a simple example usage of the ProcessState node, where a parent process contains a reference to a child process via a ProcessState node. The process definitions are stored in a relational database.

      The child process actually executes successfully (I have a single node with an ActionHandler that prints the node name to System.out).
      However, I receive a NullPointerException in the ProcessState.leave() method - the executionContext.getSubProcessInstance() method call (first line in the method) returns null, and the next line then attempts to invoke a method on this null reference.

      I see from the debugger that the executionContext object in the ProcessState.execute() method is different from the executionObject I later see in the ProcessState.leave() method - though in both methods the subProcessInstance member of the executionContext object is null.

      Here are my two process definitions:

      <process-definition
      xmlns="" name="parent">
      <start-state name="start">

      </start-state>
      <end-state name="end1"></end-state>
      <process-state name="process1">
      <sub-process name="child"/>

      </process-state>
      </process-definition>


      <process-definition
      xmlns="" name="child">
      <start-state name="start">

      </start-state>
      <end-state name="end1"></end-state>

      <action name="action" config-type="bean" class="SysoutActionHandler">



      </process-definition>

      Any ideas? Given my limited analysis of the ProcessState.java code and related classes, I do not see how this can actually work - am I seeing a bug?

      Thanks