Problem in invoking assignment handler using taskinstance.en

[prabuddha]

The method taskInstance.end() says it will end a task and might invoke the handler . what does that mean?
Currently its not invoking the handler.
Below is the code I'm using to assgn a task AssignTask.java
The Handler class is ApproveAccount.java.

The taskcontroller params are not accesible due the reason the signal is being done before assigning.

So what is wrong here ? Please explain

public class AssignTask {

 ProcessInstance processInstance = null;
 ContextInstance contextInstance = null;
 TaskMgmtInstance taskMgmtInstance = null;
 protected JbpmSession jbpmSession = null;
 protected GraphSession graphSession = null;
 protected TaskMgmtSession taskMgmtSession = null;
 protected ContextSession contextSession = null;

 static JbpmSessionFactory jbpmSessionFactory = JbpmSessionFactory
 .buildJbpmSessionFactory();


 static { jbpmSessionFactory.getJbpmSchema().createSchema(); }


 public AssignTask() {

 }

 public void buildProcessDefinition(String actor) {
 ProcessDefinition processDefinition = ProcessDefinition
 .parseXmlString("<process-definition name='AccountApproval'>"
 + " <start-state>"
 + " <transition name='submit' to='Approval' />"
 + " </start-state>"
 + " <controller>"
 + " <variable name='NAME'/>"
 + " <variable name='ADDRESS'/>"
 + " </controller>"
 + " <task-node name='Approval'>"
 + " <task name='Approve'>"
 + " <controller>"
 + " <variable name='NAME'/>"
 + " <variable name='ADDRESS'/>"
 + " <variable name='COMMENT'/>"
 + " </controller>"
 + " <assignment class='org.jbpm.tutorial.param.ApproveAccount' >"
 + " <assignee>" + actor + "</assignee> "
 + "</assignment>"
 + " </task>" + "<transition to='NewAccount' />"
 + " </task-node>" + " <end-state name='NewAccount' />"
 + "</process-definition>");
 JbpmSession jbpmSession = jbpmSessionFactory.openJbpmSession();
 jbpmSession.beginTransaction();
 graphSession = jbpmSession.getGraphSession();
 jbpmSession.getGraphSession().saveProcessDefinition(processDefinition);

 processInstance = new ProcessInstance(processDefinition);
 graphSession.saveProcessInstance(processInstance);

 processDefinition = graphSession
 .loadProcessDefinition(processDefinition.getId());
 processInstance = graphSession.loadProcessInstance(processInstance
 .getId());
 contextInstance = processInstance.getContextInstance();

 jbpmSession.commitTransaction();
 jbpmSession.close();
 }

 public void submitsApprovalTask(String actor) {

 buildProcessDefinition(actor);

 JbpmSession jbpmSession = jbpmSessionFactory.openJbpmSession();
 jbpmSession.beginTransaction();
 ProcessDefinition processDefinition = jbpmSession.getGraphSession()
 .findLatestProcessDefinition("AccountApproval");
 ProcessInstance processInstance = new ProcessInstance(processDefinition);

 Token token = processInstance.getRootToken();

 token.signal();

 TaskInstance taskInstance = (TaskInstance) processInstance
 .getTaskMgmtInstance().getTaskInstances().iterator().next();

 Map parameters = new HashMap();
 parameters.put("NAME", "JBPM");
 parameters.put("ADDRESS", "32,CTS");
 parameters.put("COMMENT", "One Billion Dollar Company");

 taskInstance.submitParameters(parameters);


 \\ testing the taskcontroller parameters submitted

 contextInstance = processInstance.getContextInstance();

 System.out.println(contextInstance.getVariable("NAME"));
 System.out.println(contextInstance.getVariable("ADDRESS"));
 System.out.println(contextInstance.getVariable("COMMENT"));


 jbpmSession.getGraphSession().saveProcessInstance(processInstance);

 jbpmSession.commitTransaction();
 jbpmSession.close();
 }

}

assigment handler

public class ApproveAccount implements AssignmentHandler {

 private static final long serialVersionUID = 1L;

String assignee;

 public void assign(Assignable assignable, ExecutionContext executionContext) {
 assignable.setActorId("CAG");

 ContextInstance contextInstance = executionContext.getContextInstance();

 TaskInstance taskInstance=executionContext.getTaskInstance();

 List taskFormParameters = taskInstance.getTaskFormParameters();

 \\ this is giving me the label names correctly but the values submitted are showing null.

 Iterator iter = taskFormParameters.iterator();

 while (iter.hasNext()) {
 TaskFormParameter tfp = (TaskFormParameter) iter.next();
 String label = tfp.getLabel();
 System.out.print(label);
 System.out.println(contextInstance.getVariable(label)); \\\ displays null
 }


 }
}

[kukeltje]

where did you read ending a task might invoke 'a handler' and why do you think it should be an assignmenthandler? The only handler ending a task could invoke is one on an event and that is not an assignmenthandler (although you can do an assingment in there yourself)

Ronald

[tgullo]

Why not send the task to a node that approves the account. That is, break the task into two?