restrict a jBPL process to be created only once

[mscbug]

Hi,

I modeled a jBPL process and all works fine. I can create tasks, start and stop them, Now I would like to restrict this process to be able to be started only once. Where can I model such a behaviour?

My process defintion looks like this:

<?xml version="1.0" encoding="UTF-8"?>
<process-definition name="process-import">
    <start-state name="start">
        <transition to="import" />
    </start-state>
    <task-node name="import">
        <task name="import" description="Performes a reimport">
            <assignment actor-id="#{actor.id}" />
        </task>
        <transition to="done" />
    </task-node>
    <end-state name="done" />
</process-definition>

Thanks in advance,
Markus