0 Replies Latest reply on Jan 4, 2006 1:42 PM by Fred Muhlenberg

    task management and association with process instance

    Fred Muhlenberg Newbie

      Within jBoss, I am attempting to find all the tasks associated
      with a process instance yet I receive this exception every time
      the code runs. What is failing and how do I correct my code?

      As I'm writing this rant, I keep thinking that I don't have a task
      associated a process instance yet I assigned an actor in a
      task-node task handler and thought this is enough.


      411 List l = new ArrayList();
      412 // Find all executing processes with this definition
      413 ProcessInstance piarr[] = getExecutingProcesses( jbpms );
      414
      415 for (int indx = 0; indx < piarr.length; indx++)
      416 {
      417 ProcessInstance pi = piarr[indx];
      418
      419 l.addAll( pi.getTaskMgmtInstance().getTaskInstances() );
      420 }


      org.hibernate.HibernateException: null index column for collection: org.jbpm.graph.exe.ProcessInstance.instances

      Stack Trace
      org.hibernate.persister.collection.AbstractCollectionPersister.readIndex(AbstractCollectionPersister.java:652)
      org.hibernate.collection.PersistentMap.readFrom(PersistentMap.java:222)
      org.hibernate.loader.Loader.readCollectionElement(Loader.java:994)
      org.hibernate.loader.Loader.readCollectionElements(Loader.java:635)
      org.hibernate.loader.Loader.getRowFromResultSet(Loader.java:579)
      org.hibernate.loader.Loader.doQuery(Loader.java:689)
      org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:223)
      org.hibernate.loader.Loader.loadCollection(Loader.java:1916)
      org.hibernate.loader.collection.CollectionLoader.initialize(CollectionLoader.java:36)
      org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:520)
      org.hibernate.event.def.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:60)
      org.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:1562)
      org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:343)
      org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:85)
      org.hibernate.collection.AbstractPersistentCollection.readElementByIndex(AbstractPersistentCollection.java:160)
      org.hibernate.collection.PersistentMap.get(PersistentMap.java:127)
      org.jbpm.graph.exe.ProcessInstance.getInstance(ProcessInstance.java:136)
      org.jbpm.graph.exe.ProcessInstance.getTaskMgmtInstance(ProcessInstance.java:170)
      servlet.WorkflowAdminServlet.getProcessTasks(WorkflowAdminServlet.java:419)
      servlet.WorkflowAdminServlet.doPost(WorkflowAdminServlet.java:203)
      javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
      javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
      :


      I just can't seem to get anything related with tasks to do
      anything other then blow up -- even the tutorial examples (copied
      line for line) don't work but somehow the webapp does and I don't see
      the difference.

      Any suggestions are appreciated.