[jboss-user] [jBPM Users] - Conditional Task Assignment with Fork

[pradeep.gulla]

Is it possible to assign conditional tasks with Fork node in JBPM.

As per my requirement, workflow should allow optional Parallel tasks and a mandatory sequential task.
But I'm getting some issues while conditionally assign tasks with fork.

Process definition:


  | <?xml version="1.0" encoding="UTF-8"?>
  | <process name="conditional_task" version="1" xmlns="http://jbpm.org/4.0/jpdl">
  | 	<start g="27,32,80,40">
  | 		<transition to="Validate Approval Seqence"/>
  | 	</start>
  | 	<!-- Checks which sequence to initiate ie., Either Parallel or Sequential -->
  | 	<decision expr="#{isOptionalTasksExists}" name="Validate Approval Seqence" g="257,31,80,40">
  | 		<transition name="true"  to="Assign Parallel Tasks" g="-24,2"/>
  | 		<transition name="false" to="Sequential Task" g="564,54:-75,-21"/>
  | 	</decision>
  | 	<!-- Parallel Task Assignment -->
  | 	<fork name="Assign Parallel Tasks" g="258,139,80,40">
  | 		<transition to="validateFirstParallelTask"/>
  | 		<transition to="validateSecondParallelTask"/>
  | 	</fork>
  | 	<!-- Conditional Task Assignment -->
  | 	<decision name="validateFirstParallelTask" g="135,221,80,40">
  | 		<transition to="First Parallel Task">
  | 			<condition expr="#{firstParallelApprover != null}"/>
  | 		</transition>
  | 	</decision>
  | 	<task assignee="#{firstParallelApprover}" name="First Parallel Task" g="71,325,169,40">
  | 		<transition name="Approve" to="wait for other tasks" g="-45,-18"/>
  | 	</task>
  | 	<decision name="validateSecondParallelTask" g="384,221,80,40">
  | 		<transition to="Second Parallel Task">
  | 			<condition expr="#{secondParallelApprover != null}"/>
  | 		</transition>
  | 	</decision>
  | 	<task assignee="#{secondParallelApprover}" name="Second Parallel Task" g="308,324,204,40">
  | 		<transition name="Approve" to="wait for other tasks" g="-45,-18"/>
  | 	</task>
  | 	<join name="wait for other tasks" g="270,436,80,40">
  | 		<transition to="Sequential Task"/>
  | 	</join>
  | 	<!-- Sequential Task -->
  | 	<task assignee="#{sequentialApprover}" name="Sequential Task" g="494,437,147,40">
  | 		<transition name="Approve" to="Finish" g="-45,-18"/>
  | 	</task>
  | 	<end name="Finish" state="Completed" g="778,431,80,40"/>
  | </process>

This definition forces me to supply either (2 Parallel and 1 Sequential) or (0 Parallel and 1 Sequential) approvers, but not 1 Parallel and 1 Sequential.

Thanks in Advance

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