Incorrect Incoming Transition evaluation on Join Node

[pradeep.gulla]

I'm Using JBPM4.1 with SQLServer 2000.

My process xml contains a FORK node for assigning 2 parallel tasks.
I've created on extra Task Node which is not part of Fork but contains outgoing transition to JOIN.

When I'm trying to complete the 2 created tasks, execution is not forwarding.
JOIN node waits for the completion of extra task (which is not created).

Process definition:

<?xml version="1.0" encoding="UTF-8"?>
<process name="join_test" version="1" xmlns="http://jbpm.org/4.0/jpdl">
 <start><transition to="Assign Parallel Tasks"/></start>
 <fork name="Assign Parallel Tasks">
 <transition to="Task 1"/><transition to="Task 2"/>
 </fork>
 <task assignee="#{approver1}" name="Task 1">
 <transition to="wait"/>
 </task>
 <task assignee="#{approver2}" name="Task 2">
 <transition g="-104,-54" to="wait"/>
 </task>
 <!-- This won't particpate in workflow but still comes in the list of incoming transitions -->
 <task assignee="#{approver3}" name="Task 3">
 <transition g="-104,-54" to="wait"/>
 </task>

 <join name="wait">
 <transition to="Final task"/>
 </join>
 <task assignee="#{approver4}" name="Final task">
 <transition to="Finish"/>
 </task>
 <end name="Finish" state="Completed"/>
</process>

Test case:

public void testOptionalParallelAssignment() {
 HashMap variables = new HashMap();
 variables.put("approver1", "approver1");
 variables.put("approver2", "approver2");
 variables.put("approver3", "approver3");
 variables.put("approver4", "approver4");

 executionService.startProcessInstanceByKey("join_test", variables);

 //First Task Approval
 List<Task> taskList = taskService.findPersonalTasks("approver1");
 taskService.completeTask(taskList.get(0).getId());
 //Second Task Approval
 taskList = taskService.findPersonalTasks("approver2");
 taskService.completeTask(taskList.get(0).getId());
 assertTrue("Atleast One Task should be Active", taskService.findPersonalTasks("approver4").size() == 1);
 assertTrue("Final Task should present", taskService.findPersonalTasks("approver4").get(0).getName().equals("Final task"));
 }

How to remove this unwanted transition ??

[kukeltje]

Since you have a transition from task3 to the join, it is in the incoming transitions and the join expects an incomming token/execution. It cannot easily decide there will not be a token comming from task3.

Two things come to mind:
- implement your own join node
- use the n-out-of-m configuration (multiplicity attribute, see docs)

[pradeep.gulla]

thanx for ur quick reply.

The second option (multiplicity attribute) may not work for me :(
coz, number of transitions may vary as per my requirment.(0 to 7 and more)

Option 1 -> suits better for me. I've changed the JoinActivity of JBPM Source code and its working. But it should not be like this :)

I want to create my own custom join, but i don't know how to bind this Join :(
Any suggestions ??