2 Replies Latest reply on Nov 6, 2008 9:30 PM by Aldo Bonzi

    Seam with jBPM - task(slash)process id may not be null

    Jakub Naruszewicz Newbie

      Hi!


      I'm seam beginner and I have got problems with integrating seam with jBPM. (using JBoss AS 4.2 and Seam 2.0.2)


      I have got two Stateful Session Beans:


      @Stateful
      @Name("startProcess")
      @Scope(ScopeType.BUSINESS_PROCESS)
      
      public class StartProcessBean implements StartProcess{
              @In(value="processInstance", required=false, scope=ScopeType.BUSINESS_PROCESS) 
              @Out(value="processInstance", required=false)
              ProcessInstance processInstance;
                      
              @In(value="taskInstance", required=false, scope=ScopeType.BUSINESS_PROCESS)
              @Out(value="taskInstance", required=false)
              TaskInstance taskInstance;
              
              @Begin
              @CreateProcess(definition="todo")
              public String begin(){
                      log.info("begining");
                      return "success";
              }
              
              @Remove
              public void remove(){
                      log.info("removed");
              }
              
              @Logger
              Log log;
      }



      and


      @Stateful
      @Scope(ScopeType.BUSINESS_PROCESS)
      @Name("start")
      public class StartMyTaskBean implements StartMyTask {
              
              @Logger
              Log log;
              
              @In(required=false,value="processInstance")
              ProcessInstance processInstance;
              
              @In(required=false,value="taskInstance")
              TaskInstance taskInstance;
              
              
              @StartTask()
              public void beginTask() {
                      log.info("Task started");
              }
              
              @EndTask
              public void endTask(){
                      log.info("Task ended");
                      
              }
              
              @Remove
              public void remove(){
                      log.info("Removed");
              }
      }



      I'm invoking this beans methods from form:



      <h:commandButton value="Create process" action="#{startProcess.begin}"/>
      <h:commandButton value="Begin" action="#{start.beginTask}"/>
      <h:commandButton value="End" action="#{start.endTask}"/>
      



      When i click on Create process button everything looks ok, but when i try to begin task using Begin button, I see the debug page with message:



      Exception during request processing:
      Caused by javax.servlet.ServletException with message: "#{start.beginTask}: javax.ejb.EJBTransactionRolledbackException: task/process id may not be null" 



      Server logs looks ok, jbpm configuration also...


      Could anyone tell me, what is wrong?


      Thanks and regards!


      Jakub Naruszewicz