Ok! Thank you so much for your help. And do you know how can I insert a timer in this code: if when a user don't partecipate for 3 hours in a workflow to change at next user in list?
<?xml version="1.0"?>
<process-definition name="wkf">
<swimlane name="initiator" />
<start-state>
<task swimlane='initiator' name="start" />
<transition to="timerNode"></transition>
</start-state>
<state name="timerNode">
<timer name="scheduler" duedate='5 minutes' repeat='true'>
<transition to='choose participants node' />
</timer>
</state>
<task-node name="choose participants node">
<task name="choose-participant" swimlane="initiator" />
<transition to="condition on participants" />
</task-node>
<!-- add rights -->
<decision name="condition on participants">
<event type="node-enter">
<script>
<variable name="participant" />
<expression><![CDATA[executionContext.setVariable("previousActorId",
(participant == null ? executionContext.getJbpmContext().getActorId() :
participant.actors))]]></expression>
</script>
</event>
<transition to="setup rights">
<script>
<variable name="participants" />
<variable name="participant" access="write" />
<expression><![CDATA[participant =
participants.remove(0)]]></expression>
</script>
</transition>
<transition condition="#{empty participants}" to="follow transition" />
</decision>
<node name="setup rights">
<action
class="org.nuxeo.ecm.platform.jbpm.core.helper.AddRightsActionHandler">
<list>participants</list>
</action>
<transition to="validate node" />
</node>
<task-node name="validate node">
<task name="validate">
<event type="task-create">
<action
class="org.nuxeo.ecm.platform.jbpm.core.helper.TaskNotificationHandler" />
</event>
<controller
class="org.nuxeo.ecm.platform.jbpm.core.node.VirtualTaskInstanceController" />
<assignment pooled-actors="#{participant.actors}" />
</task>
<transition name="validate" to="condition on participants">
</transition>
<transition name="reject" to="validate after reject node" />
</task-node>
<task-node name="validate after reject node">
<task name="validate-after-reject">
<event type="task-create">
<action
class="org.nuxeo.ecm.platform.jbpm.core.helper.TaskNotificationHandler" />
</event>
<controller
class="org.nuxeo.ecm.platform.jbpm.core.node.ValidateRejectController"
/>
<assignment
pooled-actors="#{contextInstance.variables['previousActorId']}" />
</task>
<transition to="condition on participants" />
</task-node>
<node name="follow transition">
<action
class="org.nuxeo.ecm.platform.jbpm.core.helper.LifecycleTransitionActionHandler"
/>
<transition to="end" />
</node>
<end-state name="end">
<event type="node-enter">
<action
class="org.nuxeo.ecm.platform.jbpm.core.helper.RemoveRightsActionHandler" />
</event>
</end-state>
</process-definition>
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